Scully 280B Series Instruction And Maintenance Manual Download

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Summary of Contents for 280B Series

Page 1: ...e plate affixed to the recorder This is of utmost impor ance when ordering spare parts or concerns service information Figure 1 depicts a typic name plate for a Model 280B and what the CODE numbers represents Scully 280 B I Professional Recorder Reproducer I r 01 02 ______ __ XX 03 DICTAPHONE CORP MTN VIEW CA MADE IN U S A 04 05 06 NAB 3 75 7 5 IPS NAB 7 5 15 IPS IE C 7 5 15 IPS NAB 15 AES 30 IPS ...

Page 2: ...oducers Instruction and Maintenance Manual AUDIO ELECTRONICS DIVISION OF DICTAPHONE CORPORATION 475 Ellis Street Mountain View California 94043 U S A 415 968 8389 TLX 345524 Serial No _ _ _ __ Catalog No 200612 03 Julv 1977 Date Received _ _ _ __ Printed in U S A ...

Page 3: ...h are warranted for 90 days Dictaphone will replace all parts free of charge for 90 days Thereafter Dictaphone will replace all parts except for motors and heads free of charge except for labor during the balance of the warranty period The original using buyer must properly fill out and send the warranty card to the factory within ten days from delivery to establish beginning of warranty period Fa...

Page 4: ...CONNECTIONS 2 3 SECTION 3 OPERATION 3 1 3 1 GENERAL 3 1 3 2 TAPE THREADING 3 1 3 3 SELECTI G SPEED AND APPLYING POWER 3 1 3 4 PLAYBACK MODE 3 1 3 5 STOPPING THE UNIT 3 1 3 6 RECORD MODE 3 1 3 7 SYNC MODE 3 3 3 8 EDIT MODE 3 3 SECTION 4 PREVE NTIVE IVIAINTENANCE 4 1 4 1 GENERAL 4 1 4 2 CLEANING 4 1 4 3 LUBRI ATION 4 1 4 4 DEMAGNETIZING 4 1 SECTION 5 FUNCT IONAL CHECKS AND ADJUSTMENTS 5 1 5 1 GENERA...

Page 5: ...tment 7 3 7 5 Tension Posts 7 3 7 6 Pinch Roller Adjustment 7 6 7 7 Constant Tension Adjustment 7 8 7 8 ATL Adjustments 7 9 7 9 CHECKOUT AND ALIGNMENT PROCEDURES 7 9 7 10 Test Equipment Required 7 10 7 11 Preliminary Procedures 7 10 7 12 Playback Alignment 7 10 7 13 Record Alignment 7 12 7 14 Record Bias Set 7 12 7 15 Record Calibrate Alignment 7 16 7 16 Record Equalization 7 16 7 17 Erase Alignme...

Page 6: ...Setup 7 10 7 12 Electronics Assembly Top View 7 11 7 13 Equalization PWA Adjustments 7 12 7 14 Record Playback Amplifier PWA Adjustment and Test Points 7 13 7 15 Regulator Bias Oscillator and Amplifier PWA 7 14 7 16 Bias Amplifier PWA Adjustment and Test Points 7 15 8 1 Transport Logic Schematic Diagram 8 3 8 2 Regulator Bias Oscillator and Amplifier PWA 8 5 8 3 Bias Amplifier PWA Schematic Diagra...

Page 7: ...ort Control Logic Harness Assembly 8 79 8 35 Transport Control Power Harness Assembly 8 81 8 36 Capstan Motor Assembly 8 83 8 37 Scrape Filter Assembly 8 85 8 38 Record Head Assembly 8 87 8 39 Playback Head Assembly 8 89 8 40 Head Cable Assembly 8 91 8 41 Erase Head Assembly 8 93 8 42 PWB and Erase Head Cable Assembly Full Track 8 95 8 43 PWB and Erase Head Cable Assembly 4 Track 8 97 8 44 Power S...

Page 8: ...LAA 500 Line Amp PWA 8 70 Tension Sensor PWA 8 71 Light Sensor Assembly 1 1 Models of 280B Series Recorder Reproducer 1 2 Specifications 2 1 Power Supply Jumper 6 1 Transport Logic Operation 8 1 Schematic Diagrams and Parts List 8 2 Abbreviations 8 3 Manufacturers Code Numbers and Addresses 8 143 8 145 8 153 8 155 8 157 8 159 8 160 1 2 1 2 2 3 6 5 8 24 8 161 8 163 vii ...

Page 9: ...lications that require exacting performance specifications and reliability standards The complete Wlit consists of a tape transport mechanism and electronics assembly The equipment can be mounted in a console or a standard 19 inch 48 26 cm equipment rack The configurations of the 280B Series are listed in Table 1 1 Complete specifications for the 280B Series are contained in Table 1 2 Figure 1 1 P...

Page 10: ...lent in s cm s Frequency Response 30 00 76 2 2 dB at 50 Hz to 20 kHz 15 00 38 10 2 dB at 30 Hz to 18 kHz 7 50 19 05 2 dB at 30 Hz to 15 kHz 3 75 9 52 2 dB at 30 Hz to 10 kHz Signal to Noise Ratio Using 3M 206 tape or equivalent at peak record level of 500 nWb m with weighted noise and equalization Full Half Two Four Four in s Track Track Track Track Track 0 25 0 25 0 25 0 50 0 25 1 30 00 72 dB 68 ...

Page 11: ...l speed 0 1 in 200 ms with a full supply reel From Play tape moves less than 1 5 inches 3 81 cm after pressing STOP At wind speed tape stops in less than 5 seconds Less than 60 seconds for 2400 foot 730 5 meter NAB type A reel 0 25 inch tape To l1 5 inches 28 2 cm CCIR Floating Bridging 10 Kilohms impedance minimum level 200 mV 24 dBm into 600 ohm Load output impedance 60 ohms 105 to 125 or 220 to...

Page 12: ...itched automatically when tape speed is selected A RECORD READY switch on the record playback control panel allows recording on any or all channels Each record playback control panel con tains a vu meter that indicates playback or record levels One record playback control assembly is provi ded for each channel One regulator bias oscillator and amplifier PWA provides dc voltages and bias sig nals f...

Page 13: ...r 7 5 in s Monitor speaker Speaker accessory Accessory The monitor is available for single NAB 7 5 or 15 in s IEC 7 5 or 15 in s channel systems It mounts in the electronics DIN lEC 3 75 or 7 5 in s assembly and has its own volume control NAB AES 16 or 30 in servo equipped Console Cabinets models lEC AES 15 or 30 in s servo equipped One and two channel models Four channel Special equalizations ava...

Page 14: ...le the console riser and electron ics shelf F Fasten this assembly to the top of the console with th e bolts provided 2 3 CONSOLE MOUNTING A Mount the transport into the cutout on the top surface Tighten the mounting screws Remove the capstan flywheel from the hard ware bag and mount it on the capstan motor shaft B Mount the electronics assembly in the elec tronics cabinet above the transport In s...

Page 15: ...ARANCE LECTRlNICS ASSY l l I 1 r 4 1 ll I 1 _ CI nnI 1L lL 1 ______ 19 ___ __ jj 11I32 10 l L CONVERSION TABLE FOR 280B MOUNTING DIMENSIONS Figure 2 1 Mounting Dimensions INCHES 11 32 1 1 2 1 3 4 2 2 1 4 2 7 8 4 METRIC METRIC EQUIVALENT INCHES EQUIVALENT 8 73 mm 4 3 4 12 07 em 3 811 m 5 1 4 13 34 em 4 45 em 8 1 2 21 59 em 5 08 em 10 25 40 em 5 72 em 15 3 4 38 10 em 7 30 em 19 48 26 em 10 16 em ...

Page 16: ...tronics assemblies are used connect cable W3 between the J123 power transfer connector on all electronics assemblies D If the remote control assembly is used con nect its cable to remote socket J111 on the transport control chassis assembly Installation E Connect cable W4 between ac power plug J201 on the power supply and a 115 120 volt 50 60 Hz power source If the recorder is operated at a differ...

Page 17: ...NEL I CHANNEL I CHAHNEl 2 I POWER 3 HEAD INPUT INPUT JIX ____ JI_ A____ J ELECTRONICS uNIT 0 0 o o CH 4 L r ER Jl23 lINE QUl LINE IN 20174 0 JI20 014 Jllg au El 2 TftAMSf ER NtUT SOQI T INPUT PCMER _ _ _ 1 HEAD INPUT JI25 B I J IIO I p o J _ I I l 4 liT VAC SO SOH CMLL P U IDEHTIf ICATtoN NOTES r PUO ou_v Pl UG MUST BE INSTALLED AND WITH JUMPEft IN PLACE AS SHOWN 200159 WHEN SERVO IS NOT USED CABL...

Page 18: ...Model 280B Installation JUMPER WIRE SEE DETAIL A DETAIL A Figure 2 3 Power Supply Jumper 2 5 2 6 ...

Page 19: ...nge tape speed while in the Play mode Damage to the machine may result 3 4 PLAYBACK MODE A Thread the recorded tape on the transport B Set the Monitor switch to PLAYBACK C Set the Function switch to SAFE D Press the START pushbutton 3 5 STOPPING THE UI IIT Press the STOP pushbutton to halt tape motion from any mode The 280B automatically stops if the tape breaks or end of tape is reached This is p...

Page 20: ... FAST FORWARD BLUE 7 STOP WHITE 8 START GREEN 9 CAPSTAN LOW HIGH 10 EDIT YELLOW RECORD PLAYBACK CONTROLPAI IEL 1 RECORD INDICATOR LAMP 2 FUNCTION SELECTOR SWITCH RECORD READY RED SAFE GREEN SYNC ORANGE 3 RECORD PLAYBACK MONITOR MONITOR SWI TCH 4 PLAYBACK LE VE L 5 RECO RD LEVEL 6 VU METER Figure 3 1 Controls and Indicators ...

Page 21: ...rded channel may be obtain ed from the recording head stack This is accomp lished by setting the Function switch on the appropriate record playback control panel to the SYNC position Figure 3 2 Tape Threading Path Operation 3 8 EDIT MODE The Edit mode can only be entered from or dis abled by the Stop mode To edit the tape A Set the Function switch to SAFE and the Monitor switch to PLAYBACK B With ...

Page 22: ...y type be cause dirt and dust particles may be forced into rotating parts D Use a rubber band to hold the tape break arm and manually move the reels Moisten a Q tip with isopropyl alcohol and squeeze out excess fluid Contact the pressure roller with the Q tip and sweep the tip up and down the surface until all oxide is removed from the pressure roller Change the applicator as soon as it becomes fo...

Page 23: ...m in the head circuitry A With power to the recorder switched off turn on the demagnetizer and put its tips against the poles straddling the head gaps in the cen ter of the head B Slowly rub the padded tips up and down against the face of the head a few times c Slowly travel to the next head and repeat this demagnetizing procedure until each head has been demagnetized D Very slowly pull the demagn...

Page 24: ...he STOP lamp lights E Press the FAST pushbutton and check that the FAST lamp lights and the tape moves forward in a fast wind F Press the FAST pushbutton Check that the FAST lamp lights and the tape moves in a fast rewind G Press the STOP pushbutton H Input a signal such as 1000 Hz to the ma chine Set the MONITOR switch to RECORD and adjust the RECORD LEVEL control for the desired level on the vu ...

Page 25: ...ransport START pushbutton has been pressed and the Function Selector switch is in the SYNC position the sync relay on the motherboard is energized to pennit switching of the record head for the selected channel s to the playback moni toring mode while recording on other channels This feature allows the operator to synchronize recording with previously recorded material on the selected channel s 6 ...

Page 26: ...EC STATUS 25V 25V ___ _ PLAYBACK r R 6__o 7 1f___j HEAD 5 POWER SUPPLY 40 V r UNREG 117 VAC i SYNC 25V 25V REL PLAY 3 EQ 2 tJll LINE IN 1 25V PLAY 0 CAL ER IlLUM 25V BIAS ADUST SQU ELCH FUNCTION TIMING CIRCU IT FRONT PANEL AGC t 2009328 Figure 6 1 System Block Diagram ...

Page 27: ...Model 280B Theory of Operation TRANSPORT ATL CONTROL AC CAPSTAN SOLENOID ASSEMBLY MOTOR Figure 6 2 Transport Bottom View 6 3 6 4 ...

Page 28: ...ON ON ON OFF ON OFF OFF OFF ON ON OFF FROM PLAY I I I I a a I a a I TAPE U7 3 U7 4 U7 9 UR 3 U8 6 US S U8 12 U5 9 US 7 US 4 ON OFF OFF OFF OFF OFF OFF OFF OFF OFF ON ON OFF BREAK 0 I 0 0 0 0 0 a 0 0 U10 9 ul la U I II U12 13 U 12 1 U12 4 U7 2 U 12 5 U3 3 U9 6 U9 8 OFF OFF OFF OFF ON OFF OFF ON OFF OFF ON ON OFF EDIT I 0 I 0 0 I 0 I I I WIND TO US 7 US 4 US 13 UI 8 US S US I U2 6 U2 3 U4 11 U3 6 U ...

Page 29: ...s adjusted by means of roundhead screws 5 that pass through access holes in the head bridge mounting plate 3 on either side of the center fastening screw 7 The left hand screw has a spring which floats the left side of the head assembly Only the right hand screw is used to adjust the azimuth B Zenith is adjusted by means of two Allen set screws 4 that pass through access holes in the head bridge m...

Page 30: ...B SETSCR 201728 r I I I I t yf I 1 c r 0 I 0 r I k I I T I 1 r Tr J I L J I m r 11_ I I j N I EWS Ie top t p I I I I I I I I I I I I I I 4J lId I BRAKE ADJUSTMENT ACORN NUTS 2 LOCKNUTS 2 BRAKE DISC Figure 7 1 Brake Adjustments ...

Page 31: ...mbly 9 is centered in the slot of the photon coupler on the PWA B Connect a voltmeter using the 0 to 5 Vdc minimum range between ground a Ul l on the transport logic PWA Figure 8 32 Loosen two screws 18 on motion direction sensor bracket 4 Hold reel knob on supply motor and rotate it back and forth slightly Position the motion direction sensor bracket until the voltage switches from 0 to 3 5V mini...

Page 32: ...GE MOUNTING SCREWS 9 PLAYBACK HEAD SHIELD 3 HEAD BRIDGE MOUNTING PLATE 10 SCRAPE FILTER ASSY 4 HEAD ZENITH ADJUSTMENT ACCESS 11 RECORD HEAD STACK ASSY 5 HEAD AZIMUTH ADJUSTMENT SCREW 12 ERASE HEAD STACK ASSY 6 SCRAPE FILTER ROTATION ADJUSTMENT SCREW 13 TAPE GUIDE POSTS 7 HEAD ROTATION ADJUSTMENT SCREWS 14 INPUT TAPE GUIDE Figure 7 3 Head Adjustment 7 4 ...

Page 33: ...Model 280B Maintenance 2X 5 2 1 17 2 t 2 3 2 X LX 4X Figure 7 4 Motion Direction Sense Adjustment 7 5 ...

Page 34: ...ut The rubber pinch roller bearing has been selected for minimum radial runout The radii of the inner and outer raceways of this bearing are larger than the ball therefore some rocking freedom can be felt When the pinch roller is actuated this freedom Figure 7 6 Pinch Roller Adjustment allows the face of the pinch roller to align with the capstan thereby minimizing tape distortion from any scrubbi...

Page 35: ...Model 280B Maintenance J204 MECH ELECT 1 4 I TEST PA S 201 1 2 R204 R204 Figure 7 7 Power Supply 7 7 ...

Page 36: ...observe the VOM It should indicate 85 5 volts rms D Tum R204 cw until the voltage drops 3 volts rms Record this voltage Tighten the lock nut on R204 E Check that the optical grating is rotating in the center of the opto coupler slot as shown in Figure 7 8 A and B F Loosen the setscrew on the coupler Figure 7 8A and move the dancer arm to the fully ccw from the top position Position the opti cal gr...

Page 37: ... mm from the front face of the solenoid as shown in Figure 7 10 Then tight en the two adjustment screws 6 securely D Loosen the setscrew 1 in the actuating arm and position the tape lifter post 9 so that it clears the tape by 0 025 to 0 050 inch 0 635 to 0 270 mm when the solenoid is de ener gized NOTE When the ATL is correctly ad justed the felt bumpers will stop the motion of the ATL at both ext...

Page 38: ...erform the following procedures make the test setup shown in Figure 7 11 and proceed as follows A Thread a standard reproducer alignment tape on the recorder B Set controls as follows CAPSTAN speed selector switch to HIGH Function switch to SAFE Monitor switch to PLAYBACK PLAYBACK LEVEL switch to CAL C Open the electronics drawer for access to cali bration adjustments Figure 7 12 t 400 H A FILTER ...

Page 39: ...Model 28GB Maintenance RECORD PLAYBACK CONTROL PANEL MOTHERBOARD PWA REGULATOR BIAS OSCILLATOR AMPLIFIER PWA Figure 7 12 Electronics Assembly Top View 7 11 ...

Page 40: ...Adjust bias level potentiometer RIO on the regulator bias oscillator and amplifier PWA for 40 volts p p using the oscilloscope C On four track systems repeat steps A and B to adjust R6 on the bias amplifier PWA Fig ure 7 16 for channels three and four D Install 3M 206 tape or equivalent E Set Function switch to RECORD and CAP STAN speed switch to HIGH F Press START and then RECORD pushbut tons on ...

Page 41: ......

Page 42: ...7 14 Maintenance Model 280B TP2 BlK TPJ RED TP4 VEL R10 TP1 VEL BIAS LEVEL SET Figure 7 15 Regulator Bias Oscillator and Amplifier PWA ...

Page 43: ...Model 280B Maintenance TP1 YELLOW BIAS LEVEL SET R6 Figure 7 16 Bias Amplifier PWA Adjustment and Test Points 7 15 ...

Page 44: ...rrespond to record and playback heads 7 18 Depth of Erase A Record a 1000 Hz tone at 6vu 10 dBm on voltmeter for several minutes Remove input signal Model 280B B Rewind tape to beginning of 1000 Hz tone C Connect the output of the machine through a 1000 Hz filter to the ac voltmeter D Place the machine in the Record mode and check the erase head rotation for proper gap control E Erase should be at...

Page 45: ...nonic It should be less than 0 6 H Adjust calibration on wave analyzer to 1V reading 1 Reset wave analyzer to 1 5 kHz third har 7 21 Flutter monic To check flutter use ANSI S4 3 1972 method J Readjust selector knob on wave analyzer until Flutter shall not exceed the values listed on page a reading is indicated on the meter 1 2 7 17 7 18 ...

Page 46: ...T 8 1 GENERAL This section of the manual contains all schematic schematics are at the front of the section followed diagrams parts list and assembly drawings for the by the parts list Each parts list precedes its rela Model 280B Series Recorder Reproducers All ted assembly drawing 8 1 8 2 ...

Page 47: ...2 1 J OJ C 4 40K V Ri 1 1 1 tI stT Ni i 7c I LA S l l 2 l I Tt tc 6 1 5 0 Schematic Diagrams and Parts List Model 280B 5V 5v 5 1 Jc05 e c p Al 0 R O L MF J204 r R E TL F t V n KI 8 t t TrR R PS I l H lt PL j O 3 J2L2 3 J2W 7 i J 3 rST t lAf R 1_2 D I ffi K e J 209 l l3 J 2 J 2L 0 ill j 00J 209 7e l 1 rrJ I c U J JOTES G L ESS TlI l RWI SP EC Fl E l f 1 M Is i I N H IA S I l JiC l l I rl IC ARE 1 l...

Page 48: ...07 R8 7 50V RI9 33K t 2N44 N61l4C 1 680 0 14 R42 2 2 K R43 1 22 K R44 20 K 1 1o 4C7 3 V 2N29JSA 0 2 25VOC REG CR 3 CR2 C23 C4 R9 RI8 RI S t MJ E 680 1 R20 3055 CR6 22 K rd 1 Ff 1 00 K 22 K R7 27 R 7 0 11 lOO K C7 R 2 CI S CI2 R31 i r 25V f o IK 10K t 1 c c I FF 002 POLY 1 002 POLY RIO 010 63V 2 5 I F 03 63V 2 5 R6 BC409C CR5 2COK 2N S457 27 R21 BIAS l R33 TP 4 22K L VE 1 80 YE L LOW Ae J C5 t R32 ...

Page 49: ...Ft IJAL L S ARE IN O IS 1 4 WI PI03 2 V II 1 r l 01 04007 C Uf 50V 201 R2 390 R3 390 RII I RIO I R9 4 7 f Q2 04107 p I YELLOW 4OVf P RI 160 KHZ NOMINAL 4 7 w II 10 3 o f I s REFI R NC DESIGNATIONS LAS T US O NOT US O RI6 GNO 8 201817C Figure 8 3 Bias Amplifier PWA Schematic Diagram 8 7 8 8 ...

Page 50: ...I I NOTES Unless o therWise spl cified I 2 Al l capacitC ncl va lu s ire In microfarads 35V i 20 I 3 All di odes are 5 0 05 All tr3mistors are Be 550 For hold 5 r I I vice allerna te for Q12 15 16 15 2N5089 I For Ql 4 6 8 18 14 are tN5039 or I BCS49C I t Two Raysistors in Mono ICI1l0Y IIJmper I R4 n mono s 820 1 2W l lVJ 6 RelaY i K 1 K2 schematic I l_ as vi ew ed from bottom i 2 Cl01 C102ar 02 2S...

Page 51: ...D PA IR 0 06B F 1 O p F OI 5 uF 20 K I MEG 20K I MEG OK 20K 220K 5 220 K 5 4 7K 5 4 7K S 4 7K 5 4 7K S 220 A R 03 04 05 06 IEC NAB liES IEC AES DIN lEe 7 S ISIPS 15 30 Irs IS 3 r S 3 75 1 5 5 MATCHED ATCI iED M TCHED MATCHED PAIR PAIR PA IR PAIR 0068 F 10068 F 0 0f F 00 6d I S I OOpF 0 0 68 F I OIS pF I 20K I MEG 20K I MEG SK 20 K 3301 330K 4 7K S 4 7K S 4 7K 5 4 7K 5 4 7K S 220 AIR AIR OVpf SIOOp...

Page 52: ...F r 5l t7k 7 H I 7 H 8 J 9 K I u B 9 t 3 O n 0 Z _ IO L I M r 0 II M IU o r _ 12N V 12 N V KI EQU I Tt _ _H_ L p L A Y I N C NDI R G BT 2 5 1 REG 25V 8 25V r H Jl2 JJU JJ2 1 CH N I REC P e CHAN 2 R C P8 REGUL ATOR 81AS OSC NOTES u r JLESS OTHERWISi SPECIFI ED I ALL RES ISTANC E VALl E ARE IN OH MS 1 4W IO 6 REF JI 26 2 ALL CAPACI TANCE ALU S ARE IN MICROFARADS 1 0 3 REL AYS PINS NOT USED KI PIN 8 ...

Page 53: ... I TO 23 P I T O cl4 240 VAC 220 VAC 125 VAC 1 5 VAC 1 0 5 VAC R2 01 VVV C20 1 4 7K 1C2 02 2W EUT 6 8LU 0 0 eRN T 2900 Uf 10 lZgoOUF E4 E3 SOV rh 50V f20 1 BRN eRN POWE R INPUT 105 2 10 1 1 I IH ATSINK TOIl Q UE CON T 14 R D rEL 5 AMP G lN 1 r l CUIt E ND 15 RN R4 I P20 4 J 204 I w 1 0K R20 5 rr I 2 R Z03 L2K TB202 1 TENSION C TB202 2 y EL 7 WHT 1 R2 10 K I PWA L MOTOR CONT VIO NEUT_7 _ OZ510 r E4...

Page 54: ...pF NOT FOR SERVO MOTOR Sill TBI 0 1 IjTAPE BREA K 5V o SWITCH T81 02 I 2av j T 6A PIOI RE F T81038 TAPE BREAK CHA S GND TAPE JIOI BREA K RP 5V djij JI04 o 0 I ul PINCH o 2 ROL LER JI03 Q J 2 0 3 5v D XUIOI 24V o TRANSPORT LOGI C ASSY 201600 n REFI o J204 G J209 8 8 f v CAPS TAN MOTOR i II t f 8 JI07 I l rfl lli i L n1 O ff I I I r t 18 1 I J I IIII M CIO CI02 aUF 4UF INVERTER CI03 Q o auF i 9 t t ...

Page 55: ...1I K 4 MONO DI 100 2 K STeREO 005 005 170 27Q v A 4rfl STER O Y4 STEREO 002 00 2 2 20 IW 2 20 1IV A 200625C viewed from socket side Dl 1EL D A o IILl l 1 PB 1 4EAD C ONNEC OR5 r R ED Z RI R E D F 2 O RN 4 2 5 elf 0RN E L o YE L Ell RZ FJ YEL J 4 C21 4 7 8LU BLU 3 H NOTE S l h VLEn orHERWIU S CIFIC 1 f1 lD NOr CON VECTE El cz RE SELEL ED 0 1 EIt E El D l JO Jl L ALU I Ri HOWN COMPONENT VALUES PA Z ...

Page 56: ...I r r I RI lOOK R 2 220 I I I I I f I I I I I I I I I I L _ 1 I L _ _ _ _ E 2 I o I WeT E2 O I L ___ Figure 8 10 Motion Direction Sensor PWA SI 04 8 SI04 7 SYNC RELAY POOI 3 SI04 3 REC PB SWITCH SI03 1 25V GNO 201512 JOI 4 J 5 1 25V R9 RIO 10K 7 25V 3 QI 2N5461 2 J 6 NC 8 1 25V RII lOOK 25V iC4 10 35V Figure 8 11 Squelch PWA 8 21 ...

Page 57: ...___ II 8 6 5 4 14 15 ORN BlK ORN WHT RED BlK RED BlK RED WHT NO I iC RECORD L _ 1 REWIND lAMP REWIND L_ J SI031 2 i i i FAST FORWARD lAMP I NO I FAST FORWARD L __ J B l U B l K ______ STOP lAMP STOP PLAY lAMP PLAY 5V 24V GND NOTES I NC NORMAllY CLOSED SI05 IS NOT USED 201714 RECORD REWIND FAST FORWARD STOP PLAY CONTACT OF SIOI THRU Figure 8 12 Remote Control ...

Page 58: ...grams and Parts List 4 1 K 2N3 306 ADl FOR 2N4105 lOUTPUT 5YMI 1ETRY In fz w I 8K I BK b 4 22 0p 2 50 l5V 02 ISv INPUT GND DUTPUT 2 5V 250A7004C Figure 8 13 Line AmplifierPWA Monitor and Speaker Assembly Schematic Diagram 8 23 ...

Page 59: ...02690 01 1 1 Transport assy 2 trk mono 1 2 trk 0 25 see Fig 8 15 for bkdwn 202690 02 1 Transport 0 50 see bkdwn assy 4 trk Fig 8 15 for 202690 03 1 Transport assy stereo 1 4 trk 0 25 see Fig 8 15 fo fo r bkdwn 202690 04 1 Transport see Fig assy 4 trk 0 25 8 15 for bkd m 202690 05 1 Electronics assy FT see Fig 8 50 bkdwn chan for 1 200576 01 1 1 1 1 Electronics assy chan 1 and 2 see Fig 8 50 for bk...

Page 60: ...ch kit 112150 4 4 8 4 4 8 Screw pnh 10 32x3 8 110091 8 8 8 8 8 8 Screw ovh 10 32x5 8 110283 8 8 8 8 8 8 Washer brass J 10 lIeA l1 padded 111104 N P C1812 73484 1 1 1 1 1 Ree l 0 25 10 5 metal empty 112171 RB 1 4x10 1 2 66346 1 Reel 0 50 10 5 metal empty 112172 RB 1 2x10 1 2 66346 1 1 1 1 Console assy mono s tereo see Fig 7 6 for bkdwn 200600 03 1 1 Console assy quad see Fig 8 62 for bkdwn 200600 0...

Page 61: ...n 0 062 dia male 160030 1854 27264 1 1 1 1 1 1 Cable back tie mount adhesive 162228 ABMS AD 06383 1 1 1 1 1 1 Cable tie nylon 162297 1 1 1 1 1 Tape splicer 0 25 183019 TS8D 02773 1 Tape splicer 0 50 183020 TSV50 02773 1 1 1 1 1 1 Head demagnetizer 183017 30112 2J50 72653 1 1 1 1 1 1 Head cleaning pads 183018 22 9000 09071 1 1 Monitor speaker panel assy see Fig 8 68 for bkdwn 201499 01 1 Conversion...

Page 62: ... Standard head cover 502010001 02 6 1 1 1 Intcon cable assy mono 200568 02 stereo see Fig 8 17 for bkdwn 7 1 1 Intcon cable assy quad 200568 03 see Fig 8 17 for bkdwn 9 1 1 1 1 1 Screw flh 6 32 x 1 4 1 10020 10 1 1 1 1 1 Screw set cup pt 110136 6 32 x 1 8 1 1 1 1 1 1 1 Tape break switch assy 200547 01 see Fig 8 1 8 for bkdwn 12 1 1 1 1 Dancer assy 1 4 see Fig 202692 01 8 22 for bkdwn 13 1 Dancer a...

Page 63: ...z s e e Fig 8 20 for bkdwn Capstan motor kit 3 75 7 5 ins 50 Hz see Fig 8 20 for bkdwn Pinch roller assy 0 25 tape see Fig 8 21 for bkdwn Pinch roller assy 0 50 tape see Fig 8 21 for bkdwn Tape break arm assy 0 25 tape see Fig 8 23 for bkdwn Tape break arm assy 0 50 tape see Fig 8 23 for kdwn fiead bridge assy mono FT 0 25 see Fig 8 24 for bkdwn Head bridge assy mono 1 2 trk stereo 2 trk 0 25 see ...

Page 64: ...er tension sensor Scre w btnhd 10 32 x 5 8 Sc rew b tnhd 8 32 x 1 4 Screw flh 8132 x 1 2 Sere ovh 6 32 x 3 4 Sere pnh 6 32 x 1 4 Screw pnh 6 32 x 1 2 Lockwasher int t no 6 Screw pnh 6 32 x 5 8 Knob 11 16 x 13 32 Lcob asher int t no 8 Spacer sensor mtg Sc rew pn h 8 32 x 1 2 Cable ie nylon 16 21981 Cable tie mount adhesive back Pan e l assy front dress std Panel front dress B zc l red button Panel ...

Page 65: ...ansport ass i continued Screw b t nhd 10 32 x 1 2 Screw btnhd 10 32 x 3 4 Housing cap dancer Screw btnhd 8 32 x 1 1 4 Brkt airpot mtg Bel lcrank Screw btnhd 8 32 x 1 2 Spring extension dancer Brkt sensor mtg Light sensor assy see Fig 8 71 for bkdwn Tension sensor PylA see Fig 8 70 for bkdwn Screw pnh 6 32 x 1 4 Washer flat 6 SST Nut hex 4 40 Airpot modified Nut hex 8 32 Washer lock ext t 8 202690 ...

Page 66: ...ModeJ 280B Schematic Diagrams and Parts List 2 X 4 3 44 58 3X I o 33 l X zx e e e f2 E F o GY 202690A Figure 8 15_ Transport Assembly 1 of 2 8 31 ...

Page 67: ...0B Schematic Diagrams and Parts List 6 9 Z 41V I DuMM Y P U6 p s R r o C ITEJ 1 p 2 U IC Omf t TlO AlI l PAl2 T OF 2GOe o j o 79 J Z etr VIE W A A CflL c 2 1 9 Figure 8 15 Transport Assembly 2 of 2 202690A 8 32 ...

Page 68: ...rque motor brake assy 201693 01 supply see Fig 8 28 for bkdwn 7 1 To rque motor brake assy 201713 01 takeup see Fig 8 29 for bkdwn 9 1 ATL linkage assy see Fig 502010400 11 8 30 f o r bkdwn 10 1 Head platform base plate 502010400 51 assy 1 Head base plate 508010402 01 502010202 3 Standoff head bridge 3 Setscrew ovp 8 32 x 110103 1 2 1 1 1 Arm assy pinch roller 201546 01 1 Arm pinch roller 201545 0...

Page 69: ...y cont d 202689 18 5 Lockwasher int t 6 111023 19 8 Nut hex 10 3 2 x 5 16 111123 20 8 Lockwasher int t 10 111025 21 1 Spacer brass 6 32 x 0 375 1 4 od 112058 21 2 1 83330 22 2 Torque spacer 502060002 23 4 Screw pnh 6 32 x 3 4 110180 24 1 Washer flat nylon 111131 NW25 6874 95987 25 4 Screw btnhd 10 32 x 1 00 110132 26 1 Screw pnh 6 32 x 1 2 110175 8 34 ...

Page 70: ...s and Parts List o 2S 4X o o e 12 2X o o o 108X o o e e o o o o o ryREF 4X REF II NOT ES oGJ o I ASSY NUMBER IS Z02 DB XX 2 WIRES AND CABLES ARE OMITTED FOR CLAR ITY 10 a o o o 202689A Figure 8 16 Transport Subassembly 1 of 2 8 35 8 36 ...

Page 71: ...Model 280B Schematic Diagrams and Parts List G r G 23 l 0 r I F l l A 1 _VA o 1 1 c 4 5 11 I 3 11 J a C Figure 8 16 Transport SlI bn mbly 2 of 2 202689A 8 31 8 38 ...

Page 72: ...2 1 779 Bl DBt1 25P DBS 1221 1 D32 tt659 COOl rD t r T NO 02 6 60 5170 5 51105 7 1785 7 17 85 71785 J O 7 10 1 0 _ _ J TQ PI J _I i rpOM uc re c 0 N ICI N fu I 1_ 1 1 Q t CHAN ONL Y Model 280B Schematic DiagraJru and Parts List 9 16 fU c r P 21 jf1 I o J II I r Ci R 0 8 11 L 1 e5 B 0 i 01 Ii r t l LA _ 18 l A 1 125 I OT ro t 13 J 5 4 03 SHOWN RsJON rA eR5 r o4 r N JOT L cl A r NIvM f Q I O O c B x...

Page 73: ...7 01 t I I 1 1 Plate tape break switch 200551 2 2 Screw pnh 2 5 6 x 5 8 110169 3 2 Washer flat 112 111001 4 2 Term pin 0 062 dia female 18 22 AWG 160029 15 61 27264 5 1 Conn rcpt 3 hole 160045 1625 3RI 27264 9 1 Switch SA hi lever ratio 162172 E61 50H 01963 10 2 Spacer brass 0 25 4 1 4 od x 11 2011 2340 83330 1 1 2 Lockwasher int t 2 111021 o 4 0 m t Figure 8 18 Tape Break Switch Assembly 8 41 ...

Page 74: ...ate assy see Fig 8 33 for bkdwn 202670 01 7 TB 101 thru TB103 3 3 Solder lug 2 point 162222 863 G3330 8 4 4 Lockwasher int t 6 111023 9 JllO 1 1 1 2 1 2 Conn female Washer flat 8 soc 6 160052 111003 S 3308 AB 13150 12 5 5 Nut 6 32 kep ext lockwasher 111063 13 2 2 Cable back tie mount adhesive 162228 ABMS AD 06383 14 17 17 Screw pnh 6 32 x 1 4 110174 15 5 5 Spacer 6 32 unc x 0 75 112055 16 2 2 Scre...

Page 75: ...202669 01 J 0 Cable Lie nylon IT IC 5 t nf 1 pt I G2J1S 1i oa SST l S l B 06J83 178 0 I 0 1 n I PW AS 5Y M Jill I l OTES J5 S 1 Y A P I 6 1Z I CJZ 11 0 o vU i fULl J W JI A T 4 ClEAR 9u bV l Al MR f hIP n M rt 4 N I OR I Tt 1 o 41_ Jt r J M 1 1 U L r_ H I 6 t 1 Ao4 Utl PI MoIU S J 41 r J 1f JI U or Ir M 7 _ 5 I P C 16 HI A q o T6A j A l t 4 4 r 1 T JIO J s I1tJ f b L S p I tJ Jr 1 CNMJt FlU 6 t J ...

Page 76: ...1 Capstan motor dSSy 3 75 7 50 50 Hz se e Fig 8 36 for bkdwn 200S63 03 4 1 Capstan motor assy 7 S0 15 0 50 Hz see Fi g 8 36 fo r bkd m 2 00563 0 5 1 1 Flywh ee l ma c ine d 2002 90 02 6 1 1 1 1 Shie l d capstan motor 20045 9 02 8 1 1 Flywhee l machined 2002 90 03 9 10 1 1 1 1 1 1 1 1 Setscrew o vp ll cn hd 10 32 x 1 2 Dummy plug a ssy i nve rte r 11 0162 202376 01 Pl10 1 1 1 1 Con n plug wit h cov...

Page 77: ... 0 625 ad x 0 196 w Ret a i ning ring 11 2099 Ro ll e r Cl SSy 0 50 tape 2015 44 02 Hub a s s y pi nch rol l er 2 01 U9 02 0 5 0 t ape Bca r i ng rdl 0 250 id x I 12 0 0 0 625 o d x 0 196 w Re ta i n i ng r Ing 1 i 2 099 ShclL t pi nch rollar 0 150 20 1669 01 It ape S haft pinch rol l er 0 5 0 1669 02 cape Spa cer 2 a p i nc h rol l r I 50 10 50200 0 2 50 Spacer c ap p inch rolle r I 50 2 050 2 0 ...

Page 78: ... 1 01 7 1 Dancer arm assy 202531 02 9 5 5 5 lasher 0 375 cd x 0 257 id 3 x 0 03 0 thk 10 1 1 1 Retaining ring 11 2102 1 1 1 Washer 0 375 cd x 0 257 id 11111 0 x 0 003 thk 5103 25 79136 12 1 1 1 Washer 0 375 ad x 0 257 id p 0 005 thk 13 2 2 2 Washer 0 375 ad x 0 257 id 111 112 x 0 01 0 thk I I 14 2 2 2 washer 0 375 ad x 0 257 1 109 x 0 001 th k 15 1 1 1 Sha ft dancer pivo t 20 1827 0 3 16 1 pancer ...

Page 79: ... 1 Microswitch adj col lar 501030106 5 1 1 Spring torsion 502030102 1 6 1 Spring adj collar 50103010 3 7 1 1 Cap pressure roller blk 50 1050205 0U 8 1 1 Base section t ape guide 501030302 01 9 1 1 Top section tape g ui de 501030302 0 2 10 1 Spacer tape guide 0 25 501030302 0 10 1 Spacer t ape guide 0 50 502030302 01 1 11 Screw filhd u uO une x 1 10222 5 8 11 1 Screw f i Ihd u uO une x 110223 7 8 1...

Page 80: ...te r e o 202712 06 2 t rk DIN s ee Fig 8 14 f o r NH 2I 1 1 1 1 1 1 1 Hea d bridge mtg platfo rm 200784 01 I 2 2 2 2 I 2 I 2 1 a e g uide p o st 0 25 50201 0102 01 ass y p ar t s not s o ld sep arat el y 3 2 Ta pe g u i d e post assy 0 50 502010104 01 a rt s not sold sepa r ately 4 1 1 1 1 1 1 Scra Je f ilter ass y 0 25 20 1929 01 0 50 s e e F ig 8 37 fo r bkdwn 5 1 Rcd hd stack a s s y 2 trk 1 20...

Page 81: ... 1 PE hd st ack assy FT 0 25 200579 01 see Fig 8 39 for b kdwn 17 1 PE hd stack ass y 2 trk 2005 79 0 2 0 25 see Fig 8 39 for bkdwn 1 8 1 PE hd s tac k a s s y s t e r eo 200579 03 4 trk 0 25 see Fig 8 39 for bkdwn 19 1 PE h d stack assy q uad 200 57 9 04 4 trk o 25 s ee Fi g 8 39 f o r bkdwn 20 1 PE hd s tack a ss y 4 trk 200579 05 0 50 s ee Fi g 8 39 f o r bkdwn 2 1 1 PE hd stack assy 2 trk 2005...

Page 82: ... f R PAIlT NO CODE DENT NO I Model 280B Schematic Diagrams and Parts List 4 RJR AU MODEL a PT 0 0 I TEM 2 2 U ED O l D l 1 T R D O 1 lX rOE r I r3 tB I 1 I 1 I C t o Q I I 0 2 2 _ I _J_ 3 2 I l t 0 1 9 I 0 1 o I 1 1 6Q I I _ i i t u 3zJ Ii I I I I 1 I 1 la 4X 1 JT I II 3 t 1 1 3 el I C JI I 1 I I I V I I v P 1 9 I 1 19 1 1 0 I Z I T r P I CAr L T 10 o J X CIEPT I Q D WR l lO 0 fl Irfj T I I S IOI ...

Page 83: ...271 90 10 12 11 Screw pn 8 32 x 1 4 1 1 10168 Setscrew c tl p 6 3 2 U 1 C I 11 013 JI B Sets e r o vp 10 32 un x 1 1 10 16 2 1 2 Was r fl at 8 I 1 11 004 I 15 1 la3 er flat 0 227 c 1 2 oc 0 0 9 t hk Lo c k asher i nt t fI Ro ll ir 1 8 dia x 7 16 1 11 109 8 1 11 0 24 I j 121 20 17 A Urit Lng a rr 501050 101 18 Cor n p lU9 no l e 16 00 35 16 2 5 3P l 27 26 1 9 Term male p i n 22 q 0 0 62 di 16 0028 ...

Page 84: ...0035 Term pin 0 062 dia 160028 male I 22 ga Setscrew ovp 10 32 x 0 25 11 10113 Setscrew cup pt 4 40 x 110226 1 4 Screw pnh 8 32 x 1 4 110 168 Washe r flat 18 11 100 U Lockwashe r int t 8 1 1102 U Pin roll 0 125 x 0 07 112120 Pin cotter 0 06 d ia x 3 4 1 1212 U Ivasher I flat 0 227 id x 111098 0 50 ad l r Tl CODI PA RT DENT 1 0 NO 15 UU 27190 1625 3P l 2726 1560 2726 1 96310 1 7373 8 u c T I I r 5I...

Page 85: ...82389 J20 1 9 1 Co rd a c power 1 601 26 P2392 823 89 Ref J201 17 3 Fu seho l der 3AG 162000 342 004 7 5915 F20 1 F202 F203 18 1 Fus e 3 AG 1 0A 162006 31200 1 759 15 F203 19 1 Fuse 3 AG 3 0A 16200 8 31 2003 75915 F20 2 20 1 Fuse 3AG 5 0A 162009 312005 75915 F2 01 21 2 Tie strip 4 poin t 162078 53F 71785 TB2CT TB20 22 4 Se re truss hd 6 32 x 1 4 1 10 12 2 23 1 Scre w pnh 6 32 x 5 8 11 0206 24 4 Sc...

Page 86: ... 32 x 1 2 110175 43 2 Screw pnh 4 40 x 3 8 110172 44 3 Washer lock int t 1 2 111028 45 1 Heatsink assy 202522 01 46 S201 47 J203 1 1 Sw Conn rcpt 6 position 162111 160047 518 1625 6R 83330 27264 48 P204 1 Conn 3 position 160045 1625 3R1 27264 53 R204 1 Res var 250 K 2 10 156112 380 C2 12697 54 R205 1 Bridge rectifier 153069 750B4L 81483 55 RV201 1 Varistor 153022 VP130A10 72653 58 R203 1 Res carb ...

Page 87: ... sensor PWA see Fig 8 47 for bkd m 201620 01 Bracket sensor motion direction 201689 01 Solenoid brake see Fig 8 48 plate assy for bkdwn 502060200 Brake plate assy 8 49 for bkdwn see Fig 201704 01 Bushing Teflon 502060404 Clamp cable 0 187 id nylon 112411 8911 83330 Motion direction arm assy sensor 201702 01 Brake disc assy 201828 01 Setscrew x 3 8 cup pt 10 32 110149 Pivot motion direction arm act...

Page 88: ... 1 L l Figure 8 27 Primary Power Supply 8 63 Schematic Diagrams and Parts List NOTES II Transformer ref fo r orientati on 01 pri mary l0 wires colors brn grn red blu yel gry orn vio red yel grn yel Secondary 3 wires colors two blk wht oMount item 35 ref capacitor mounting clamp QtY 2 so that screw heads are accessible from outside of assembly Crimp item 63 to red wire of item 14 PI sha ll be capab...

Page 89: ...Parts List 4 xl 4 Y 3 REF 2 2 REF NOTES 1 Part No is 201693 01 Set spacing of item no 10 from item no 2 in accordance with assembly procedure no 201 771 to dimension shown 201693A Figure 8 28 Torque Motor and Brake Assembly Supply 8 65 ...

Page 90: ...200565 01 Fig 8 45 for bkdwn 1 2 Torque motor brake plate 502060300 assy see Fig 8 46 for bkdwn 1 3 Brake disc assy 201828 01 2 Setscrew cup pt 10 32 110149 x 3 8 4 1 Brake plate assy see Fig 201704 01 8 49 for bkdwn 5 1 Solenoid brake plate assy 502060200 see Fig 8 48 for bkdwn 2 Bushing Teflon 6 502060404 7 4 Screw pnh 10 32 x 1 2 110329 8 4 Lockwasher int t 10 111025 4 Screw pnh 8 32 x 1 2 1101...

Page 91: ...arts List 6 REF 2 REF REF 2 4 REF NOTES 1 Part No i5 201713 01 o Set spacing of item No 3 from item No 2 in accordance with assembly procedure No 201771 to dimension shown 201713A Figure 8 29 Torque Motor and Brake Assembly Take Up 8 67 ...

Page 92: ... 1 1 1 2 1 1 1 1 2 1 1 2 2 ATL li nkage assy see Fi g 8 1 6 for NHA Lever defeat Knob tape lifter Lifter tape Spacer l ink Arm tape lifter Rod tape guide Screw pnh 8 32 x 3 8 Setscrew ovp 8 32 x 3 16 Screw truss hd 6 32 x 1 4 Lockwasher int t 8 Dowe l pin 0 250 dia x 2 50 Washer spri ng 0 1 90 id 0 375 od Washe r flat 6 Order items a unit 5 and 11 as 8 68 ...

Page 93: ...Model 280B Schematic Diagrams and Parts List NOTE I Assemble pins with ends flush to surface of 502010401 01 502010400 11 F Figure 8 30 ATL Linkage Assembly 8 69 ...

Page 94: ...ee Fig 8 16 for NHA 502060600 1 1 Reel table assy 502060601 01 1 olded assy turntable 400038 3 Reel pin 7 in 502060603 2 Disc turntable 400037 4 2 Set screw 10 32 x 5 16 110259 5 A R Foil sensing tape 66 7 32 x 162347 84 9 800 4486 5 66346 2 OLE PATTE R tV TO ALLoW FoR PlfJ CLv RA CE 5 REF 502060600 DETAIL A Figure 8 31 Turntable Reel Assembly Parts Location ...

Page 95: ...R2 R10 R22 Ref 2 1 2 1 7 6 9 1 5 2 2 8 3 Transj20rt logic PWA see Fi g 8 19 for NHA Res carb 1800 5 1 4W Res ww 1Oll 50 0 2W Res carb 4 7 1 5 1 4W Res c a rb 47 ll 5 1 4W Res carb 220 ll 5 1 4 v Res carb 1 kll 5 1 4W Res carb 2 2 kll 5 1 4W Res carb 3 9 kll 5 1 4 W Res carb 1 5 k0 5 1 4W Res carb 150ll 5 1 4W Res carb 27 kll 5 1 4 W Re s c a rb 1Oll 5 1 2W Res carb 68 kll 5 1 4W 202781 149078 1490...

Page 96: ... 6 Cap Ta rdl 20 35V ld 1 0 JF 171003 TAG 20 1 0 35 20 71468 C40 1 Cap Ta rdl 20 35V ld 2 2 Il F 171006 TAG 20 2 2 35 20 71468 C21 1 Cap elctlt aluminum vert mintr 10 J F 63V 164065 503Dl060063BB 76289 Cl C9 C15 C26 C37 5 Cap Ta rdl 20 35V ld 10 JF 171013 TAG 20 10 35 20 71468 C2 1 Cap Ta rdl 20 6 3V ld 47 JF 171014 TAG 20 47 6 3 20 71468 Cll C28 2 Cap eer disc 0 1 JF 80 20 12V 163082 UK10 l04 715...

Page 97: ...04713 CR15 CR17 2 Diode 153007 1N695 07933 U10 U12 2 IC 15500 2 SN7402 N 33809 U1 U7 2 IC 155035 SN7414 N 33809 U2 1 IC 155008 SN7408 N 33809 U3 U4 U6 U9 4 IC 155015 SN7432 N 33809 U8 1 IC 155041 SN7411 N 33809 U11 1 IC 155044 SN74121 N 33809 U5 1 IC 155053 SN74249 N Ref K1 K3 3 Skt relay 4pdt pc 156002 RA78702 OOOOA K1 K3 3 Relay 4pdt 24 Vdc 156008 RA4DO 24 OOOOA Ref K1 K3 3 Spring hold down 1560...

Page 98: ...2781 continued 8 32 27264 J203 J204 160011 A 2403 8A Wafer assy 8 circuit 46 2 27264 J202 J205 A 2403 12A 160012 Wafer assy 12 circuit 47 2 314 AG 37D 91506 Ul U4 U6 U12 162342 Skt IC DIP 14 pin 11 Ref 91506 U5 162343 316 AG 37D Skt IC DIP 16 pin Ref 1 C44 1 Ca p cer mono 470 pF 163090 3418 100C 00656 15 50V 471 K 53 5 Transipad 152083 Ref Q2 Q3 Q6 Q8 ...

Page 99: ... OF TRANSISTORS CATHODE OF DIODES AND POSITIVE DXj 41 SIDE OF CAPACITORS 26 o MARK DASH NUMBER AND ISSUE LETTER WHERE SHOWN REF USING 12 HIGH CHARACTERS AND BLACK EPOXY INK C OU H LUSH ON BOARD KI 2 3 3x 42 REFERENCE REF TH TRANSIST R SCHEMATIC 202783 20280 8 202869 202870 PADS wrTH TABS INDICATE EIrr CITTER or T ANSISTOR AND PIN I OF DUAL IN pNE ON 1 5 DETAIL A SCALE 4 1 J 2027S1A Figure 8 32 Tra...

Page 100: ...5 VA 0 009 Re S 102 1 Pus ht u t t o n red 1621 84 01 9 3iJ12 0 4 42 6 Ref S105 5 106 2 Pushbutton b lu 162185 01 931 313 04 26 Re f 5108 1 Pu s hbutton grn 1621 86 0 1 931314 04426 Ref 5 107 1 Pushbu tton dht 162 187 01 9 31 311 04 426 Ref 5 110 1 Pus hbu tton ye l 162 188 01 931315 04 26 Ref 5 102 5105 5 108 5110 6 Lamp bulb indicator 162157 335 717 12 6 Loc kwasher I int t 0 472 id 19 3 2 od 11...

Page 101: ...2 Conn sq wire 12 holes 160024 2139 12 2 27264 P202 P205 3 2 Conn plug 3 holes 160035 1625 3P 27264 J 101 J 108 5 1 Conn rcpt 15 holes 160050 1625 15R1 27264 J 111 6 34 Term sq wire crimp style 160000 2378 T 27264 Ref 22 26 ga P202 P205 P207 P208 7 5 Term pin 0 062 dia male 160030 1854 27264 Ref 22 ga Jl0l Jl08 8 1 4 Term pin 0 062 dia 160031 1855 27264 Ref female 22 ga J 109 J 111 i C j tJ8 0 7 c...

Page 102: ...45 1625 3R1 27264 3 J103 J l 06 2 Conn rcpt 9 holes 1 60004 1625 9R 27264 4 J107 J109 2 Conn rcpt 12 holes 160049 1625 12Rl 27264 5 J102 1 Conn p l ug 15 holes 160040 1625 1 5P 27264 7 16 Term sq wire 22 26 ga crimp style 160000 2378 T 27264 8 15 Term pin 22 ga 0 062 dia male 160030 1854 27264 9 Ref C101 C1 0 3 6 Term ga qdisc 0 250 22 18 1600 16 AA 1140 98 41 0 10 33 Term pin female 22 0 062 ga d...

Page 103: ... OI 8 510 81 M SI08 MH TBI02 3 35 n l f 2 7 H 5 58 59 1 70 7 7 89 CD JfOt o f CIOI v 18 00 CI02 lZ SI18 0 3 S ilO 8b 11 1i 0 7 G r j1 103 I 4 10 JZ n 5 3 1 37 80 JIIG B 3J 4O 9 fo 7 l1 7J I10 fO 5 II iNIOI 3 J o 10 o JfOif 2 Jill pt I z NOTES 1 Assembly number is 202669 01 2 Mark reference designation on connectors 3 Wire numbers not used 31 34 38 39 41 42 45 50 60 67 68 69 74 75 77 202669A Figure...

Page 104: ... NHA caps t an mo tor as s y 7 S0 15 0 50 Hz Isee Fig 8 20 f o r NHA Motor capst a n h yst sync 60 Hz Ho tor c apstan hys t sync 6 0 Hz Moto r cap s t a n hyst s y n c 50 Hz No t o r caps t an hyst sync 50 ft z Term p i n 0 062 dia mal e 18 22 ga Co nn l ug 12 hole 200563 01 2 0 56 3 02 200S 6 3 03 200568 0 0 10 1 0706 0 1 010702 0 101 0705 0 101 0 704 160028 160039 D84 HCEZU 52F D8 H CEZ U 52B D ...

Page 105: ...1 1 Mount 201934 0 1 4 1 Roller 5020 10302 02 3 2 Bea ring fl a nged ba ll 11 2005 55632 3 163 3 0 187 5 id x 0 3125 od FCHHE LO 1 6 1 Grip ring 11 223 7 5555 18 7 9136 3 2 X 1 I NOTES 1 Assembly part no is 201929 01 2 Install items 3 4 or 5 on shaft as shown and secure with item 6 Assembly to be free of end play with item 6 properly installed 2019298 Figure 8 37 Scrape Filter Assembly 8 85 ...

Page 106: ...200517 05 2 1 1 1 1 1 Head mtg platform 200581 01 3 1 Head cable assy see Fig 502011200 01 8 40 for bkdwn 4 1 1 1 Head cable assy see Fig 502011200 02 8 40 for bkdwn 5 1 1 1 1 1 1 Screw btn hd 6 32 x 3 4 110074 6 2 2 2 2 2 Setscrew oval pt 6 32 x 110110 1 4 blk oxide 7 1 Record head assy 200602 02 8 1 Head mtg platform 200581 02 9 1 lRecord head 180007 STR 4BN31 11983 E099 10 1 Head cable assy see...

Page 107: ...iagrams and Parts List 2 x Zx NOTES 1 Assembly number is 200603 XX_ See parts list_ o Connector keyway orientation shown except 4 track version rotated 90 counterclockwise 2X _ 200603F Figure 8 38_ Record Head Assembly 8 87 ...

Page 108: ...579 05 0 50 see Fig 8 24 for NHA Ref Playback head ass i 2 trk 200579 06 DIN 0 25 see Fig 8 24 for NHA 1 1 Playback head assy 200602 03 1 1 1 1 2 Head mtg platform 1 200581 01 1 3 Playback head assy 200602 01 4 1 Head cable assy see Fig 502011200 01 8 40 for bkdwn 1 1 1 5 Head cable assy see Fig 502011200 02 8 40 for bkdwn 1 1 1 1 6 1 1 Screw btn hd 6 32 x 3 4 110074 2 2 7 2 2 2 Setscrew ovp 6 32 ...

Page 109: ... 32 x 0_50 Screw pnh 6 32 x 1 00 Spring I compression 0_240 od x 5 16 PART NO 20 0579 502011400 44 200602 09 110360 110072 110076 112509 IFH PART O CODE DENT_ NO I I I I Model 280B Schematic Diagrams and Parts List I O5 6 05 2 s 2X 15 2X 18 II I I NOTES 1 Assembly number is 200579 XX 2 Connector key way orientation shown except 4 track version rotated 90 0 counterclockwise 2X ill For connections t...

Page 110: ...200 02 502011200 04 160032 16105 6 16 1057 I 126 220 P1 39 070 P 139 0 77 02660 11983 119 83 R ED D O T 0 20 11 20 C 2 l T CZ I I L E H J I I ll J W rl CZ I 2 2 LA C_ I_r A A O j 0 0 E i 0 r U E H I 0 J J 0 H 4 TI iz 4TR z O l JLY 0 4 OfJLY Z O P IN O DP A VI l L B BL I C e j z LAt J1 D A II B O LD STYLE FULL TR 14 CO J lECTOR O t JLY FU 111 t Re NOTES rD Apply shrink tubing 161047 to unused cable...

Page 111: ...2 3 1 Head 0 25 assy 4 trk stereo 200602 04 4 1 Head 4 trk quad 0 50 180005 5 1 1 1 1 Head mtg platform 200581 01 6 1 Head mtg platform 200581 02 7 1 Head Fig cable assy FT 8 42 for bkdwn see 200623 01 8 1 Head cable assy 2 see Fig 8 42 for trk bkdwn 200623 02 9 1 Head cable assy 4 trk stereo 0 25 see Fig 7 42 for bkdwn 200623 03 10 1 Head cable assy PWB and erase quad see Fig 8 43 for bkdwn 20094...

Page 112: ...hematic Diagrams and Parts List NOTES 05 1 Assembly number is 200742 XX Connector keyway orientation shown except 4 track 112 inch version rotated 90 counterclockwise 2X 200742E Figure 8 41 Erase Head Assembly 8 93 ...

Page 113: ...assy 4 trk 1 1 1 1 Cable wi plug 161056 P139070 11983 2 1 1 1 PWB erase hd matching bd 200624 01 4 1 1 1 Conn plug 9 pin male 160032 126 220 02660 p112 1 5 Cap polyest film 0 01 167028 192P1039R8 56289 C2 uF 10 80V 6 2 Cap mylar 0 0051 167063 Type 3 29979 C1 uF 10 80V C2 7 2 Cap polyest film 0 0047 167026 192P4729R8 56289 C1 uF 10 80V C2 8 2 Cap mylar 0 002 uF 5 167058 Type 3 29979 C1 100V C2 9 1 ...

Page 114: ...0 0 4 HEAD CONNECTOR INSTALLED AT NEXT ASSY NOTES 1 Assembly number is 200623 XX Cut unused cable at connector item 1 on mono version only 02 SHOWN o Letter E shown not on silkscreen omitted for clarity 5 Shield on cables are not used 200623E 1 50 5 Figure 8 42 PWB and Erase Head Cable Assembly Full Track 8 95 ...

Page 115: ... for NHA Ref PWB and erase h e ad cable 200947 04 assy 4 trk 1 4 1 2 Cable wi plug 161057 P139077 11983 2 2 2 PWB erase hd matching bd 200624 01 3 2 Ca ble wi plug 161056 P139070 11983 4 1 1 Conn plug 9 pin male 160032 12622 02660 P112 6 4 Cap my lar 0 0047 uF 167026 192P4729R8 56289 C1 10 80V C2 7 4 Cap polyest film 0 0068 167046 192 P6829 R8 56289 C1 uF 10 80V C2 9 4 4 Res carb 390 l 15 1 2W 150...

Page 116: ... CABLE NO 4002 4 00 2 1c I05CD 4TRK 14 3 0 I 3 0 I YEL 1 50 05 BLU 04 VEF SION A B HEAD CONNECTORS NOTES 1 Assembly number is 200947 01 and 200947 04 3 Letter E shown not on silkscreen omitted for claritY 4 Shields on cables are not used Select item C1 and C2 to be selected at next a y 4 1 11Z 00 200947G Figure 8 43 PWB and Erase Head Cable Assembly 4 Track 8 97 8 98 ...

Page 117: ... 1005 Model 280B Schematic Diagrams and Parts List Mm CODE PART IDE NT O 0 4 l n 02 81 1170 E2 00 I LJ t L E8 1 C9 ell ZD3 Ref CZ05 R201 CRZOZ 2x 7 REF C20Z 7J bx R201 REF lN5 40a 0 5 2 77 JHII2 C S2 9 2U05080 146 i WM f2 P lJ RE F R201 10 4 1 2x 5 B NOTES 1 A n embly number is 20059 01 f 4 SQu re poJd indicates oexitive leod of C CO c ttllode Iud 01 dlode_ r5 For H151 3 latI0l l of C102 InnaH n a...

Page 118: ...Model 280B for lfR PART Schematic Diagrams and Parts List DESCRIPTION motor assy see 8 28 and 8 29 motor plug 9 hole qdisc 0 250 ga pin 0 062 dia ga butt end 2 pin B X p 2 WHT i3lU 2 TO B AI WHT ORG _ 5 SOL TEQtv1S RED I BLK MOTCR I HT j LEADS f GRN Figure 8 45 Torque Motor Assembly 8 101 8 102 ...

Page 119: ... see Figs 8 28 a nd 8 29 for NHA Torque motor brake plate 5020 6 0300 502060 30 1 i t 2 2 Sp ring brake plate 502060303 3 4 Spacer 8 32 x 1 1 4 112068 83 68 83330 4 4 Screw Elh 8 3 2 x 1 2 110032 5 2 Sc rew flh 8 32 x 1 1 2 1 10037 6 2 Nut hex 8 32 111054 7 2 Nut 8 32 hex elastic s t op 111048 I j 1 1 4 j CD 502060300 B Figure 8 46 Torque Motor Brake Plate Assembly 8 103 ...

Page 120: ...onn rcpt 3 hole 160045 Pl08 9 3 Term pin 0 062 dia 160029 Ref female Pl08 14 2 Screw pnh 4 40 x 5 16 110306 15 2 Lockwasher int t 4 111022 16 2 ut hex 4 40 x 1 4 small 111125 pattern H13A l 08806 1625 3Rl 27264 15 6 1 27264 01 o I o NOTES 1 Assembly number is 201620 01 oAll wires to be inserted and soldered on circuit side of board REF WIRE LIST FROM TO COLOR GAUGE LENGTH EI P108 3 BLK 20 19 5 E2 ...

Page 121: ...ee Fig s 8 2 8 a nd 8 2 9 fo r NHA Soleno id b r ake p l ate Fe lt s him Sole noid assy modi fi ed Solenoid body Te r m qd i sc 0 2 50 Screw f l h 8 32 x 3 i n 5 02060 2 00 i 5 020 6 0201 5 02060203 502060 405 0 1 162099 160016 AA 1140 11 00 39 98 41 0 NOTE Align hole in brake plate with plunger hole in solenoid using fixture 502060200 Figure 8 48 Solenoid Brake Plate Assembly 8 105 ...

Page 122: ...rake plate 502060401 1 2 Felt pad 502060402 3 1 Solenoid modified 502060405 plunger 4 1 Screw pnh 8 32 x 0 25 11016B 5 0 01 Loctite 112410 222 05972 oz 6 1 Shoe cmpsn 201705 01 6 2 t t 4 2 2 4 5 3 NOTES I PART NO IS 201 70 4 01 CENTER ITEMS 2 AND 6 ON ITEM 1 AS SHOWN IjAPPLY ITEM 5 TO THREADS OF ITEM 00 NOTALL OW A NY EXCESS TO ADHERE TO ITEMS I ANO 3 201704A Figure 8 49 Brake Plate Assembly 8 106...

Page 123: ...5 16 StOp sync swi t ch Nut hex 2 56 UNC Rec PB equa l izatio n l A NAB 3 75 7 5 inl s see Fig 8 57 for bkdwn Rec PB equalizati on PWA NAB 7 5 15 0 in s see Fig 8 57 for bkdwn Re c PB equalization PWA l Ee 7 5 15 0 inls see Fig 8 57 for bkdwn Rec PB equal i zati o n PWA NAB 15 in s AES 3 0 in s see Fig 8 57 for bkdwn Re c PB e q ua l i z a ti o n PWA IEC 15 i n s AE S 30 in s see Fig 8 57 f o r bk...

Page 124: ... 56 f or bkdwn 2 4 Rec PB equalization PWA 200605 01 NAB 3 75 7 5 inls see Fig 8 57 for bkdwn 2 Rec PB equalization PWA 200605 02 NAB 7 5 15 0 inls see Fig 8 57 for bkdwn 5 2 ReclPB equalization PWA 200605 03 IEe 7 5 15 0 inls see Fig 8 57 for bkdwn 6 2 Rec PB equalization PWA 200605 04 NAB 15 inls AES 30 inls see Fig 8 57 for bkdwn 7 2 ReclPB equ a lization PWA 200605 05 IEe 15 inls AES 30 inls s...

Page 125: ...ontrol bottom panel 200464 01 7 1 1 1 Trim control panel top 200464 02 8 2 2 2 Handle control panel 200478 01 9 2 2 2 Latch chassis slide 200736 01 10 1 pr 1pr 1pr Chassis slide 200521 C245 153 16499 1 1 3 3 3 Washer flat 6 111003 12 17 17 17 Screw pnh 6 32 x 3 8 110170 13 8 8 8 Screw pnh 8 32 x 3 8 110171 14 8 8 8 Screw 6 32 x thread 1 2 cutting pnh 110186 15 3 3 3 Nut 6 32 kep ext lockwasher 111...

Page 126: ...t plu IJO 1110 8 2 fli P l AIR I I I Compou nd heu 16 180 sllli tm X l power 1S 02 htt 2008B6 0 1 I 1 I I I I GU ide Pr B 162 ISS Flc J 12 ij J1 1 I 1 I 13t t lP C Clntt o l lne i 1 1001J9 0 Model 280B Sche matic Diagrams and Parts List MFR ICOllr o APf l I A J IJ rAE I PART Inf T o 0 DART NO I C U I Pn I I 200 5 0 CWo j O Oc 5 r O l k OOS 04 V J rq l 5 v 5r i c 3 7f rJ t 1 j W 2 v rr J i i D loU ...

Page 127: ...kll 5 1 4W Res c arb 27 kn 5 1 4W Res ca rb 1II 5 1 4W Res carb 4 711 5 1 2 1 Res ca rb 1 5 k r 5 1 2W Res var 5 kll Cap polyest film 0 001 F 10 20 0V Cap met polyest flat film 0 47 wF 10 250V Cap met pol yest fl at f ilm 0 1 llF 20 250V Cap ta rd l ld 2 2 wF 20 35V Cap e lctlt 4 7 ll F 25V Cap cer di s c 10 pF 10 10 0V Xstr xstr Xs tr Xs t r 149011 149091 14 9056 149074 1490 47 1491 36 150 303 15...

Page 128: ...r bias input 201812 01 TP1 1 Test point yel 162176 1177 71002 TP2 1 71002 TP3 1 Test point blk 162175 1177 Test point red 162174 1177 71002 L1 1 Inductor 1 0 H 10 149085 9320 30 43543 Ref 2 Screw pnh 4 40 x 3 8 110172 01 Q2 39 2 Washer flat 4 111002 40 2 Nut hex 4 40 UNC 111052 41 2 Lockwasher int t 4 111022 42 A R Compound heatsink 162180 340 71984 silicone 43 2 Washer insulating fiber 111138 231...

Page 129: ... Q4 RI3 B 2K RI5 I 1 2 1 R3 390 Q5 BC409C RI2 3 3K CI 10 PF11 00V 1 C6 2 2UF 35V RIO 1 1 IK RII IK CRI soos CR 2 S005 Q I D4007 REFERE NCE DESIGNATIONS LA S T USED NOT USED RI6 8 LI CR2 Q5 TP TI P NOTE I U l LESS OTHERWISE ALL 1 4 LI IO A H RESISTOR VALUES I 5 TPI YELLOW 40V P P SPECI c IED ARE IN OHMS 160 KHZ NOMINAL C5 47UF PART Of 250V PI03 RF BIAS R8 1 5K I ZW 5 Figure 8 53 Bias Amplifier Sche...

Page 130: ...5V lJF 163015 Type M 25 9 14 18 Ref J 125 25 25 25 Contact skt straight pc 160143 030 1990 000 71468 or 71785 K1 K2 2 2 Relay 3 2 k R 2 4 Vdc 156061 Rl0 E2816 1 77342 Tl T2 1 2 2 Xfmr 15 k R t o 600 R 157005 A 65 J 71 468 J121 J122 J124 2 3 3 Conn PW B edge 12 co ntac t s double readou t 160098 50 24B l0 717 85 J l1 7 J l1 9 J l1 8 J120 1 1 2 2 2 2 Conn Conn 3 contact 3 pin 160077 160066 XLR 3 31 ...

Page 131: ... J 123 9 9 9 Term pin female dia PC mount 0 062 160108 SDl779 27264 33 1 Plug plastic 0 812 dia 162238 P 812 95760 35 1 Plug plastic 1 00 dia 162239 P 1000 95760 Re f Jl15 Jl16 1 1 Plate headphone jack 200858 01 37 2 2 2 Screw pnh 4 40 une x 1 4 110173 38 4 8 8 Screw flh 4 40 x 3 8 110011 39 4 8 8 Nut hex machine 4 40 unc 111052 40 1 2 2 Washer flat 0 38 id 111007 4 1 6 10 10 Lockwasher int t 4 11...

Page 132: ...y o 1 1 2 U A OJN t t tR r t b 14 w r JF coV eeo 1IIr 5J 1P I I T I o l 8 R r AP SII o _ C I L J 1o J12 f I SC l O Nf If V t I O A r 7 i Jf f f fts_t 1 Ji A A E2 EJ I Q R H 0 O i NC T 51 J I t J4 I 0 1 0 L fL j v uo Schematic Diagrams and Parts List JI27 3 o TO 7 AAlj S f aR Hf r J tI l 455 2 D J D 6 LCI01 2 t J 1i EI flU 501 0 1 VPPLJE O lIn r t ANSFORM o n T CIR l llr S t T N6 IVI LIST J3 3 J Ar...

Page 133: ...ll 5 1 4W 149011 R11 R29 R30 R35 R42 6 Res 1 4W carb 2 2 k ll 5 149098 R26 1 Res 1 4W carb 3 3 kll 5 14 909 1 R5 R39 2 Res carb 4 7 kll 5 149056 R3 4 1 Re s 1 4W carb 5 6 kQ 5 149092 R31 1 Res carb 10 kD 5 1 41 1 149070 R28 1 Res carb 330 1l 5 1 4W 14909 5 R9 R20 R2 1 R43 4 Res ca r b 22 kll 5 1 4W 149013 R13 1 Res carb 27 k ll 5 1 4W 14 90 47 R8 1 Res carb 33 k ll 5 1 4W 14 9101 R15 R17 2 Res 1 4...

Page 134: ...str 152020 D40D5 03508 C19 1 Cap Ta rdl 20 35V ld 10 JF 171013 TAG 20 10j 35 20 80795 Q3 1 Xstr PET 152055 2N5457 27014 Q 14 1 Xstr pwr 152024 MJE3055 04713 Q2 Q15 2 Xstr silicon 152046 2N2905 A 04713 Q1 1 Xstr silicon NPN 152047 D40D7 03508 Q8 1 Xstr silicon PNP 152048 D41D7 03508 36 1 Heatsink 200530 01 CR2 CR3 CR5 CR6 4 Diode 153000 1N4148 03508 CR1 CR4 2 Diode 153001 So05 12060 VR2 1 Diode 12V...

Page 135: ...C16 C21 6 Cap polyest 0 1 IJF 20 flat 250V film 167019 C280AE P100K 80031 C8 1 Cap Ta rdl 20 35V Id 2 2 IJF 171006 TAG 20 2 2 35 20 71468 C5 1 Cap cer disc 20 500V 0 001 F 163058 Type BA 91418 C12 C14 C15 3 Cap 63V ps 0 002 IJF 2 5 170009 RPF 71590 TP3 1 Test point red 162174 TP2 1 Test point blk 162175 TP1 TP4 2 Test point yel 162176 L1 1 Inductor 10 IJH 10 149085 9320 30 43543 60 2 Washer fiber ...

Page 136: ...REF 02 I 1 0 NO 8 55 65 Ref Q2 Q15 66 Ref Q1 Q8 67 Ref Q1 Q8 68 76 77 2 2 2 3 Regulator bias osc ampl PWA continued Transipad xs tr spacer Screw pnh 4 40 x 3 8 Washer flat 4 Support xstr mtg Term sq wire crimp style Conn 3 pin j 200470 02 152083 110172 111002 202643 01 160001 2478 27264 160020 2139 3 2 27264 8 124 ...

Page 137: ...is 200470 XX f1J Square pads indica1e positive lead of capaci10r cathode lead of diode 0 SQuare pads indicate emitter of transistor _ b t 17 Jumpers may be replaced by zener diodes to 33 meet U S requirements jf necessary EI j 30 1 _ _ _ _ Item 64 heatsink compount is to be used 1 JW 0 2 QI5 REF __ 111 J 5 1 21 between hearsink and mounting surface of QI O 3 l 1 1 _ t Z S o 01 08 014 I cc F t RH C...

Page 138: ... ll 20 kll 10 200 545 11 M2 0 5 01 1 21 6 Rec PB ampl PWB subassy see Fig 8 58 for bkdwn 200699 02 7 Cant panel harness assy see Fig 8 59 for bkdwn 200588 03 R1 01 1 Res var 5001l 156051 70A1N04 8 P5010 01 121 9 2 2 Screw flh 2 56 unc x 1 4 110000 10 2 2 Screw pnh 6 32 x 3 16 110176 1 1 3 3 Screw pnh 4 40 unc x 3 16 110192 12 3 3 Lockwasher int t 4 111022 13 2 2 Lockwasher int t 6 111033 14 2 os 1...

Page 139: ...d 22 AIR AI R Tape psa double sided 162252 1 2 in w 26 1 1 Squelch PWA see Fig 7 61 201510 01 for bkdwn 27 2 2 Screw pnh 6 32 x 5 16 110181 28 2 2 Washer flat 6 111003 R104 1 1 Res carb 5 6Q 5 1 4w 149148 C1 01 2 2 Cap cer disc 0 02 IF 163016 Type M 25 9141 8 C102 20 25V E1 1 1 Standoff insulated brn 160206 4872 1 05 11 12284 2 56 1 Ref 1 Panel dress knob 112382 7099 09353 S103 ...

Page 140: ...E DETAIL B 2X r HARJ WARE R su8 455 Y 2 0 0699 0 r J _ 13 6 1 2 a VERS OM Dt4TR u ve2SlbtV WJO lYPe I 01 MOAIO rel 5TZREO dUM 02 I MO O VL L rCK NOTES 0 1 I 0 __ I A55fMBL T NUMBER 15 20054 J XX f3 II 19 4 f3l REF WIRE Llsr 200588 J n 0 o G Leo PSI SHORT E040 I 1 NO LeAD 2 1 REI M L f SI 1 I o Ir l15 q i 30 fUr C O I C J2 1lI04 TO BE S JLPCIl D ETAI FR J ITEM 17 REI 5 104 ro IrEM II Ji I 01 H SWIT...

Page 141: ... egualization PWA 200605 04 NAB 15 i n s AES 30 in s see Figs 8 50 8 51 and 8 65 f or NHA Ref Rec PB egualization PWA 200605 05 lEC 15 in7s AES 30 in s see Figs 8 50 8 51 and 8 65 for NHA Ref Rec PB egua l izat ion PWA 200 605 06 DIN lEC 3 7 5 7 5 i n s see F i gs 8 50 8 51 and 8 65 f or NHA R5 1 1 1 1 Res var 5 kr 1 56035 3359W 502 8029 4 R6 1 Res var 5 kf 156035 3359W 502 80294 R1 3 4 4 Res v ar...

Page 142: ...C3 1 1 Cap ps 0 0051 uP 5 63V 1 70026 2222 424 2 8003 1 5102 C3 C5 2 2 c ap ps 0 0051 uF 5 63V 170026 2222 42 4 2 80031 5102 R8 1 Res carb 220 kl l 5 1 4 W 1 49072 C1 1 1 1 1 1 1 200785 01 C2 Cap matched pair 0 0068 uF pr pr pr pr p r pr C7 1 1 16 7030 Cap polyest film 0 0 15 uF 192P1539R8 56289 10 80V C7 2 2 Cap polyest film 0 _015 167030 192p1539R8 5628 9 C8 uF 10 80V C4 1 Cap polyest film 0 006...

Page 143: ...Model 280B Schematic Diagrams and Parts List A 04 SHOWN 200605K Figure 8 57 Record playback Equalization PWA 8 133 ...

Page 144: ...om shield 200506 01 4 T2 5 1 1 1 1 Xfmr line Brac ket PWA mtg 15 7 006 200430 01 S81 X 81095 6 2 2 Spacer brass 6 x 0 25 112021 7 2 2 Sp a cer brass 6 x 0 50 112023 8 4 4 Screw pnh 6 32 unc x 0 38 110170 9 2 2 Screw pnh 6 32 x 1 25 110228 10 4 4 Nut hex kep washer 6 32 x ext 1 4 lock 111115 11 2 2 Lockwasher ext t 6 111033 12 2 2 Washer shoulder fiber 6 extruded 111050 13 1 1 Plate scr ew 200737 0...

Page 145: ... o T 2 o 4 2 7 2 2X 8 2 r 5 2 2 3 NOTES I 455cMSL Y NUMBER IS 200 3 3 X X r l R l iVIRING OF T 2 R FER TO 11II RIN6 t J l4TA TABLE 2 WIRING DATA WlI E NO FJa Nf To COLOR LEN6TH A R T2 U 1 2 T2 RELJ 2 A R 3 T2 GRI I 3 A R T2 BLK 4 A R Figure 8 58 Record Playback PWB Subassembly 8 135 ...

Page 146: ...assy see Fig 8 56 for NHA 200588 03 t 1 P002 1 Conn 0 156 sq wire centers 6 ho l e 160022 2139 6 2 27264 2 POOl 1 Conn 0 156 sq wire centers 12 hole 160024 2139 12 2 27264 3 Ref POO 1 P002 22 Term 22 26 sq ga wire crimp style 160000 2378 T 27264 25 PO 1 1 Conn 0 156 sq wire cen ters 8 hole 160023 2139 8 2 27264 26 2 Term 18 24 sq ga wire c r imp style 160001 24 7 8 27264 ...

Page 147: ... E O UP A D CI MPED TOGE THE w TH TE M 2J REC I DOD I WIPE NO C OLOI Aw6 f ROW TO 8 OW 1 1 1 1 H l W rT M 22 A H t11 O C fAD Zq Fl OA 4 OAANGE j GREE N cotv 22 A 22 C H l E G 2 U G 1 BLUE H G Co 8 BLUE A J e VIOLET I IJ 10 6RA A G II WHilE J G 1 11 BlAu e G I I T 8 J 6 10 14 WJ lT REO G I I Ii W If El A 1 3 11 M1T GRlJ E F r 18 WW BlU D Co IOj ZO 2 1 MlTjBLU 22 SI II LD I C 9l E A C Et D2 0 FlOlJ ...

Page 148: ...9073 1 4 v R3 2 Res carb 1 Mll 5 1 4W 1 49087 R12 Rl 2 Res carb 180 kll 5 149097 R2 1 4W C3 1 Cap flat film 0 068 IlF 167018 C280AE P68K 80031 20 250V C2 1 Cap met polyest rdl ld 167080 MKT1822 OOOOA 0 22 1F 10 100V 422 0 Cl 1 Cap flat film 0 22 1 F 167020 C280AE P220K 80031 20 250V C4 1 Cap Ta rdl ld 10 1F 171013 TAG 20 10 71468 20 35V 35 20 R5 1 Res carb 47011 5 1 4W 149010 Q2 3 Xstr NPN TO 92 1...

Page 149: ...l o t t O IE NOTES Square pad indicates positive lead of capacitor cathode lead of diodes pin 1 of connector JO 1 Pad with tab indicates emitter of transistors source of FET Figure 8 60 Squelch PW A 8 139 ...

Page 150: ...2 2 Inductor 4 7 mH 149065 2307 475 71895 L2 J103 1 1 Conn PWB 160128 50 70B l 71785 R47 1 1 Res carb 5 611 5 1 4W 149148 R16 3 3 Res carb 10n 5 1 4W 149055 R35 R36 R24 1 1 Res carb 47 0 5 1 41 1 149115 R9 3 3 Res carb 1000 5 1 41 1 149063 R1 9 R21 R18 1 1 Res carb 2200 5 1 41 1 149118 R25 2 2 Res carb 3300 5 1 41 1 149095 R38 R33 2 2 Res carb 390n 5 1 4W 149054 R34 R11 1 1 Res carb 4700 5 1 41 1 ...

Page 151: ...2 R50 1 1 Res 1 4 1 met a l ox i de 68 Q 1 14 9112 R4 1 Res ca r b 820 Q 5 1 2 150330 R4 2 1 1 Res 1 4VJ carb 220 kQ 5 14 9 072 R4 6 1 1 Res 1 4W carb 3 3 0 k Q 5 149067 R49 1 1 Re s 5 me ta l 1 2VJ oxide 100 k Q 1 490 28 R5 1 1 1 Res 1 4W metal oxide 100 Q 1 150089 R14 1 1 Res carb 10 Q 5 1 2W 150307 R4 1 Res carb 1 k l 5 1 2W 1503 3 1 Q2 Q3 2 2 Xstr 152050 2N440 1 03 508 Q5 1 1 Xstr 152051 2N4 4...

Page 152: ... C26 1 1 Cap 1 kV 2 C5 2 Cap C16 var 20 k Q 156036 var 5 k Q 156035 carb 3 6 k Q 5 150386 12 pin PCB 160012 6 pin PCB 160010 Ta rdl ld 1 0 IF 171013 35V Ta rdl ld 150 IF 171035 6V Ta rdl ld 2 2 IF 171006 35V cer disc 10 pF 5 163025 cer disc 99 pF 10 163028 163023 cer disc 560 pF 10 Ta rdl ld 1 IF 20 171003 cer disc 0 001 IF 163058 500V cer disc 330 pF 10 163047 elctlt 150 lJ F 25V 164023 Ref 2 2 S...

Page 153: ...02SAT iI l ypc II _29 22n 1l 2ii S i0 2 Type J F 222 2 2 1902 ClC 10 I c 2 01 CODE mtl T Nu 8003 1 11II18 0 2199 iOOll 91 18 800Jl 07 1 Oall J 0 J l 130 0 nl l TQ f L Tn N STD R i f I1H T 0 c JF 4 1 _ I d f r 0 NOT S l 3JSohd da 1 lin m J IC i lU i cathooe end of d odl l 4 o o o _ C Oi JJOGGG Q8 02 C J c s i I Y9 Y ylV 1 1 Occ GET l1 L 13 c _ Squafl lId ndlClltlt po Iltl e e3d of capacitor CoiItho...

Page 154: ... 24 for bkdwn 200580 05 4 Pinch roller assy see Fig 8 21 for bkdwn 201543 02 5 2 1 8 2 Pwr and logic transfer cab l e assy Conn plug 9 hole Term pin 0 062 d ia male 18 22 ga Cab l e tie nylon 200843 01 160003 1625 9P 160028 1560 162 19 8 SST IM N 7 Conversion kit console ampl enclosure see Fig 8 64 for bkdwn 200961 03 P 8 2 Adj guide assy 1 4 to 1 2 in Tape guide Moving segmen t Screw pnh 6 32 x 5...

Page 155: ... 8 64 Ref 3 2 9 4 15 2 16 17 4 29 Ref Conversion kit console amp1 enclosure mono stereo to quad see Fig 8 63 for NHA Angle ampl enclosure Screw wood flh 8 x 1 2 End ampl enclosure Spacer ampl enclosure Thd rod 10 32 x 12 Console assy see Fig 8 62 This Fig not illustrated 200962 03 200599 01 110154 201275 01 201276 01 112326 200600 ...

Page 156: ...0 1 4W 150031 R6 R4 2 2 Res carb 2 7 k 10 150136 R7 1 4W Cl 2 2 Cap Ta rdl ld 10 ll F 171013 TAG 20 101 71468 C4 20 35V 35 20 C2 2 2 Cap cer disc 0 01 llF 163015 91418 C3 80 20 25V Type M 25 Kl 2 2 Relay 3 2 k 24 Vdc 156061 Rl0 E 2816 1 77342 K2 T2 1 1 Xfmr 15 000 to 600 n 157005 A 65 J 81095 J122 1 1 Conn PWB edge 12 contac t 160098 50 24B l0 71785 double readout Jl19 1 1 Conn 3 pin female 160077...

Page 157: ...76 Fig 8 50 27 Ref Ref Xport assy see Fig 8 15 200575 28 1 1 Equalization PWA NAB 200605 01 3 75 7 5 in s see Fig 8 57 for bkdwn 29 1 1 Equalization PWA NAB 200605 02 7 5 15 0 in s see Fig 8 57 for bkdwn 30 1 1 Equalization PWA IEC 200605 03 7 5 15 0 in s see Fig 8 57 for bkdwn 31 1 1 Equalization PWA NAB 200605 04 15 0 in s AES 30 0 in s see Fig 8 57 for bkdwn 32 1 1 Equalization PWA IEC 200605 0...

Page 158: ...6 Ref S102 S103 2 2 Pushbutton blue 162185 01 931314 04426 Ref S104 1 1 Pushbutton white 162187 01 931311 04426 Ref S105 1 1 Pushbutton green 162186 01 931313 04426 Ref S101 1 1 Pushbutton red 162184 01 931312 04426 11 1 1 Cable clamp 5 16 id 112136 12 2 2 Spacer 0 25 6 32 x 1 0 ad thd 112057 13 4 4 Screw 6 32 x machine 3 8 truss hd 110322 14 1 1 ILockwasher int t 6 111023 15 4 Screw truss 4 x 3 8...

Page 159: ...ams and Parts List FIG QUANTITY PER ASSEMBLY iVIFR CODE PART DESCRIPTION PART WENT NO 03 04 REF i O NO I I 8 66 Remote control ass 200925 contl nuedj Ref 5 5 Lamp bulb indicator 162157 335 71744 5101 5105 33 1 1 Washer flat 6 111003 ...

Page 160: ...3 TABL MOOU 3 0 r 1M8 04 PMlEL Mou vr O loJ 28C11J 1MB 03 SHOWN NOTE Panel mount version supplied with extra mating connectors and pins items 19 26 and 27 on 04 version Model 2808 Custom cable length limited to 50 ft 200925G Figure 8 66 Remote Control Assembly 8 153 ...

Page 161: ... NO 1 lVIFR PART 0 CODE IDENT NO 8 67 Ref Conversion kit stereo mono FT see Fig 8 14 NHA to for 201285 01 i R4 2 Res carb 820 Q 1 0 1 4W 150166 R53 2 Raysistor 160101 CK2101 07933 3 1 Head Fig bridge assy see 8 24 for bkdwn 200580 01 11 Ref Rec PB ampl 8 62 PWA see Fig 200455 This Fig not illustrated ...

Page 162: ...monitor speake r Con n rc pt 3 ho le 1600 5 J2 I 1600 30 male 22 ga Te r n pin 0 062 di a I I I 160031 f ema l e 22 ga I T e t m pin 0 062 C 11 I J I 1 10173 Sc rew f lh 4 40 x 1 4 12 110192 Screw f lh U 110 x 3 16 13 1 11022 Lo c y usher I in t t 4 1 111 002 la sher I fl at 4 15 1111 63 W asher fla t ny l o n 16 x 16 0 370 o d x 0 0 15 162041 speaker 400 45Z 17 111 062 4 40 Nut kep ext l ockwa sh...

Page 163: ...1 2 1 149 1 36 10 Res c arb l OOn 15 I UW 14 9 0 63 11 Re s 1 41 1 carb 1 8 k r 5 1 49071 12 I Re s 1 4l i c arb 4 7 k Q 5 149056 13 14 1 1 1 1 1 1 1Res Res I UW carb ca r b 33 k n i s I U I 1 149101 470 k 5 149161 15 I 1 I Xstr to 1 audio pair I lP I PNP 152010 16 Xstr 152 008 17 Xstr 152009 18 He atsink I dual 162365 IFR PART NO ET6P8 X0 40 A2 WH11 0 5GA T22 Type Sfl C28 0AE P 220K Type H 2 5 33...

Page 164: ...nsor PWA Fig 8 15 fo r NHA see 202 499 01 5 Q l 1 Photon co upler 162 435 H13B2 03508 6 P203 1 Conn plug 60 hole 160037 1625 6 PI 27 26 4 7 4 Te r m pin 0 062 d i a mal e 160038 15 60 2726 4 ASSV 202 El E2 ___ __ J NOTES 1 Assembly number is 202499 01 oA ll w ires to be inserted and soldered on ci rcuit side of board 202499A Figure 8 70 Tension Sensor PWA 8 159 ...

Page 165: ...s see 202 505 0 1 Fig 8 1 5 for NHA 1 1 Ho lder l ight s e nso r 202487 0 1 2 1 Clamp ho l der 20 2486 01 3 1 Sensor ligh t 2 0 2488 01 4 2 Setscrew ovp 4 40 x 3 3 2 1101 77 NOTES CD Iden tify assy no 202505 01 by bag and tag 3 Orient item 1 to item 2 as sh own o Louvers in item 3 to be oriented in the direction shown 202505A Figure 8 71 Light Sensor Assembly ...

Page 166: ...wn breakdown gen generator blk black genl general blu blue gry gray brkt bracket H henry btnhd button head hd head cap capacitor hex hexagon carb carbon Ie integrated circuit ccw counterclockwise id inside diameter cd cadmium In inch cer ceramic instl installation cmpsn composition int internal cndct conductor intercon interconnecting coax coaxial IcV kilovolt conn connector ld lead cont control l...

Page 167: ...rinted wiring board pwr power qdisc quick disconnect rcpt receptacle rdl radial rec record ref reference reg regulator res resistor rh right hand rmt remote SCR silicon controlled rectifier 8 162 sh met skt sltd sm spdt sq sta std sw symm sync t Ta term thd thk trk V var vert W wi wlo wht ww xfmr xport xstr yel 4pdt J1 n sheet metal socket slotted small single pole double throw square station stan...

Page 168: ...nc Long Island N Y 05972 Locktite Corp Newington CT 06004 Bassick Div of Stewart Warner Corp Bridgeport CT 06383 Panduit Corp Tinley Park Ill 06540 Amatom Electronic Hardware Div of Mite Corp New Haven CT 06915 Richco Plastic Co Chicago Ill 07109 Oaktron Industries Inc Monroe Wis 07556 Calabro Plastics Inc Unitrack Div Upper Darby PA 07933 Semiconductor Div of Raytheon Mfg Co Mountain View CA 0880...

Page 169: ...sformer Co Div 46384 Penn Engineering and Mfg Co 50092 Glass Beads Co 50294 NMB Corp 51705 ICO Rally Div of Rally Industries 56289 Sprague Electric Co 66346 Minnesota Mining and Mfg CO Minicom Div 70472 Associated Spring Co 70903 Beldori Corp 71002 Birnbach Radio Co 71400 McGraw Edison Co Bussman Mfg Div 71468 ITT Cannon Electric Inc 71590 Centralab Electronics 71744 Chicago Miniature Lamp Works 7...

Page 170: ...himoor Inc Long Island City N J 79727 C W Industries Warminster PA 80031 Mepco Electra Inc Morristown N J 80223 United Transformer Corp New York N Y 80294 Bourns Inc Riverside CA 81095 Triad Transformer Corp Venice CA 82389 Switchcraft Inc Chicago Ill 83259 Parker Seal Culver City CA 83330 Smith Herman H Inc Brooklyn N Y 83486 Elco Industries Rockford Ill 84970 Sarkes Tarzian Inc Broadcast Equip D...

Page 171: ...his addendum provides adjustment procedures for the constant tension feature of the SCully Model 2808 AUDIO ELECTRONICS DIVISION OF DICTAPHONE CORPORATION 475 Ellis Street Mountain View California 94043 U S A 415 968 8389 TLX 345524 CATALOG NO 200612 01 eriel No ______ March 1977 Printed in U S A Date ReceiMd _____ ...

Page 172: ...tape speed The tension sensor PWA Figure 1 con sists of an opto coupler and an optical grating which control the amount of light which reaches the transistor The optical grating is mechanically connected to the tension sensor dancer arm As the dancer arm moves in response to changes in tape tension the tension sensor PWA initiates changes in the holdback voltage applied to the supply reel r 202499...

Page 173: ...r in the slot of the opto coupler Put the machine In Play mode and observe the VOM 85 5 volts rms It should indicate d Turn R204 voltage cw until the voltage drops 3 volts Tighten the lock nut on R204 rms Record this e Check that the optical grating is rotating In the opto coupler slot as shown in Figure 2a and 2b center of the f Loosen the setscrew on thE coupler Figure 2a and move the dancer arm...

Page 174: ...igure 2 Adjustment Procedures h Place a tape tensiometer on the tape between capstan Adjust spring on constant tension obtain proper tension as shown below O 25 in tape 3 5 to 4 5 oz O SO in tape 7 to 8 oz head bridge and figure 2d to i Close screw valve on airpot until the damping effect causes arm to bounce as it returns to the stop Open screw valve enough to allow smooth travel of the arm Open ...

Page 175: ...R N c F 201 3 POWER INP UT I05 2a ov 6C I 8RN d P e lr TOR Ul Cc NTPf L 1 EoIrEL 5 AMP UHi N T G N O 15 REo G N 18201 NEuT 7 VIQ l 2 I 0 1 r _ I PWA TlN ON rh 2 0Z4 L2K ZOJ I I A3 JYEL 6 202 2 _ __ ____ I I QI j _ _ m I 0 780 1 l E I c I I 2 0 3 I r I wKT E21 il I 19 29v EI6 1 OEO YEL R 2cJ C201 2900 50v GRN le I l a20 20 u l O j WH C20 33 uF l OG BLU R202 INI342 A201 V v V 4 7K 2w 1 0 9 20 1 202 ...

Page 176: ...ions for the 2858 Tape Reproducer Information contained in this appendix includes data applicable only to the 2858 which is not covered in the 2808 technical manual AUDIO ELECTRONICS DIVISION OF DICTAPHONE CORPORATION 475 Ellis Street Mountain View California 94043 U S A 415 968 8389 TLX 345524 Serial No _________ March 1977 Catalog No 202378 01 Date Received ________ Printed in U S A ...

Page 177: ... Assembly 1 3 1 7 Optional and Accessory Equipment 1 3 II INSTALLATION 2 1 2 1 General 2 1 2 3 Cabling Interconnections 2 1 2 3 Performance Checks 2 2 III OPERATION 3 1 3 1 General 3 1 3 3 Operating Controls 3 1 IV THEORY OF OPERATION 4 1 4 1 General 4 1 4 3 Electronics Assembly 4 1 4 7 Power Supply 4 3 V TRANSPORT MAINTENANCE 5 1 ...

Page 178: ...ation 6 5 6 17 Signal to Noise LINE OUTPUT 6 5 6 19 Noise Level SPEAKER OUTPUT 6 5 6 21 LINE OUTPUT Di stortion 6 7 6 23 SPEAKER OUTPUT Distortion 6 7 6 25 Flutter 6 7 SCHEMATICS PARTS LISTS AND RELATED DATA 7 1 ILLUSTRATIONS Page Scully Model 285B Tape Reproducer Installed In Accessory Console 1 0 Mounting Dimensions 2 1 285B Interconnection Diagram 2 3 Rear View of 285B Showing Location of Conne...

Page 179: ...t Assembly 7 12 Transport Subassembly 7 19 Transport Control Chassis Assembly 7 24 Transport Control Panel Harness Assembly 7 27 Harness Assembly Transport Control Power 7 30 Harness Assembly Transport Control Logic 7 32 Harness Assembly Audio Control 7 35 Head Bridge Assembly 7 36 Reel Stabilizer Assembly 0 25 Tape 7 38 Play Electronics Assembly 7 41 Amplifier PWA 2 Channel Audio 7 42 Power Suppl...

Page 180: ...General Information Model 2858 Figu e 1 1 Scully Model 2858 Tape Rep oduce Installed in Accesso y Console 1 0 ...

Page 181: ...are contained in Table 1 2 All models use O 25 inch tape Table 1 1 Models of 285B Tape Reproducer MODEL NUMBER DESCRIPTION 285B FT 285B 2 285B 24 Full Track Monophonic Two Channel Stereophonic Two Channel Stereophonic Two Track Four Track 1 3 HEAD ASSEMBLY 1 4 The head assembly contains three head stacks playback and two dummies The playback stack contains a full half or quarter track head refer t...

Page 182: ...61 dB dB dB FLUTTER AND WOW Weighted peak IEC 386 1972 flutter tape flutter using a ANSI S4 3 1972 prerecorded 15 in s 0 08 7 5 in s 0 1 3 75 in s 0 2 DISTORTION Recorded on 280B using 3M 206 tape 3rd harmonic distortion of 500 Hz signal at 500 nWb m is less than 3 at standard operating level 250 nWb m is less than 0 6 Speaker out 1 at 3 0 Watts into 8 0hm resistive load OUTPUTS Line 17 dBm into 6...

Page 183: ...e playback head is through a plug in cable The heads are mounted on a bridge assembly so that they may be conveniently exchanged to adapt to any desired track configuration 1 5 ELECTRONICS ASSEMBLY 1 6 The electronics assembl y is contained in an enclosure mounted under the transport tape deck It consists of a two channel amplifier All adjustments are accessible from the top of the tape deck by re...

Page 184: ...NTERCONNECTIONS 2 4 Interconnect the reproducer as shown in Figure 2 2 and detailed below Connector locations are shown in Figure 2 3 a Check that dummy plug PlIO is installed in J IIO on the transport control chassis b If the remote control assembly is used connect its cable to remote socket JIll on the transport control chassis I 2 4 5 1 28 5 365 1 30 5 I 25 I Fi g ur e 2 1 Moun t i n g Di me n ...

Page 185: ... not be used in a stereo phone jack CAUTION Check that the TAPE TENSION switch located on the side of the power supply assembly Figure 2 3 is in the 1 4 position f Connect cable W4 between ac power plug J20l on the power supply and a l1S 120 volt SO 60 Hz power source If the reproducer is operated at a different line voltage the jumper on the power transformer input winding should be changed see F...

Page 186: ...134 liNE OUTPUT Cf lAfJNEL 2 J201 A C POWER TlII L2 SPEAKER OUT CHANNEL I IBH 5 SPEAKER OUT CHANNEL 2 J130 PllIY ELECTRONICS Jl31 VOLUrf CONTROLS AND PHOOE JACX AUTO TAPE 1I FTER SO LEN OID r 1 r u EU UR O IZsl 201935 I I L I _ fSuPPL I T O RQUE I L O I L ITRANSPORT _ __ J 202366 01I _ _ _ F20lj JIOJ h I I I J I SIDE I L __ _ _J I L___ _ _ 0 c P51A MO roR NOTES UNLESS OTHERWISE SPECII IED PlIO DUr...

Page 187: ...dicate the mode of operation of the transport Controls for the 285B are identical to those of the 280B except for the VOLUME control and the PHONES jack 3 3 OPERATING CONTROLS VOLUME control CH 1 outer knob Controls loudness of the speaker or headphones connected to channel 1 VOLUME control CH 2 inner knob Controls loudness of the speaker or headphones connected to channel 2 Figure 3 1 Controls an...

Page 188: ...Model 285B PHONES jack Provides connections for headphones to the output of the reproducer Disconnects speaker circuit when headphones are inserted CAUTION Monaural headphones must not be used in a stereo phone jack ...

Page 189: ...ed components High or low speed equalization is selected by the CAPSTAN LOW HIGH switch on the trans port control panel through the transport logic PWA and applied to analog switch Ul and inverter Q5 The amplifiers of Ul close the solid state relay contacts when 2 5 to 5 5 volts appears at their inputs and open when 0 to 0 4 volt appears at their inputs Equali zation is adjusted by variable resist...

Page 190: ... _ _ I VOLUME I I I I I RIOI 291 II TBI I CHI 1 1 1 1 I ONES I I SPEAKER I CHI 4 I PLAYHEAD I L__ J OUT PREAMP L ____ J R23 U2 4 1 LINE DRI VER H 001 I I 1 POWER SUPPLY I ASSY I R2 1 U 2 T2 1J134 1 1INE DR IVER CH 2 g r I LINE OUT I RELAY LOGICI I ASSY I I 1 I I 1 VOLUME 2 I U3 C30 I II TBI PWR CH2 1 RI02 I AMPL r ONES II SPEAKER I I I I II OUT I L __ _ _ _ JI J 202392A Figure 4 1 285B Reproduce S...

Page 191: ... transformer has a tapped primary winding to compensate for different power sources The transformer is factory wired for 115 120 volt 50 60 Hz power source If the reproducer is operated at a different line voltage the jumper on the power transformer input winding should be changed see Figure 7 3 The output of the power transformer is applied to a commercial power supply regulator PSR1 The regulato...

Page 192: ...Model 285B Trans port Maintenance SECTION 5 TRANSPORT MAINTENANCE Transport maintenance of the 285B is identical to the 280B 5 1 5 2 ...

Page 193: ...nd alignment procedures should be performed at the time of installation and at other times deemed desirable by the user In stereo machines these procedures must be repeated for each channel The degaussing and head alignment proce dures described in Section 5 of the 280B manual should be performed prior to any checkout and alignment 6 5 Test Equipment Required 6 6 The following test equipment or eq...

Page 194: ... 6 1 and proceed as follows a Thread tape on machine b Set controls as follows CAPSTAN speed selector switch to HIGH TENSION switches to proper position for reel sizes c Install a 600 ohm load resistor across the LINE OUTPUT plug 6 9 Power Supply 6 10 Plug the machine into a source of power and measure the voltage of the B buss It should be 24 2 volts dc on the logic chassis If it is not adjust th...

Page 195: ...Electronics Maintenance OSCILLOSCOPE 8 0HM LOAD ACVM 1 I 000 SPEAKER LINE OUTPUT OUTPUT CHAN 1 CHAN 1 POWER SUPPLY WEIGHTING FILTER FLUTTER METER DISTORTION ANALYZER 600 0HM LOAD Figure 6 1 Initial Tes t Setup 6 3 ...

Page 196: ...3 Playback Head Azimuth 6 14 Install azimuth alignment tape and while playing back at 16 kHz adjust the rotation and then the azimuth of the play head only for the maximum reading on the AC Voltmeter Figure 6 2 Power Supply Voltage Adj ustment ...

Page 197: ... CH 2 4 dBm 1 High Speed 10 kHz HI CH 1 4 dBm 2 High Speed 10 kHz HI CH 2 4 dBm 1 Low Speed 10 kHz LO CH 1 4 dBm 2 Low Speed 10 kHz LO CH 2 4 dBm 6 17 Signal to Noise LINE OUTPUT 6 18 Connect LINE OUTPUT CHAN 1 to ASA A weighted filter and the filter to the ACVM Install a bulk degaussed roll of tape on the machine Press START pushbutton The ACVM should indicate a maximum level indicated below afte...

Page 198: ...6 6 Electronics Maintenance Model 285B H I CH I J LO CH I LO CH2 HI CH2 LEVEl CHI LEVEl CH2 Fi gur e 6 3 Equ a lization and Level Adjustment Points ...

Page 199: ...ck channel configurations The third harmonic distortion of the reproducer should be less than 0 6 Repeat for channel 2 6 23 SPEAKER OUTPUT Distortion 6 24 Connect distortion analyzer across SPEAKER OUTPUT CHAN 1 with the 8 ohm load in parallel Adjust VOL UME control to 3W output Third harmonic distortion should be less than 1 more than measured in paragraph 6 22 6 25 Flutter 6 26 Connect LINE OUTP...

Page 200: ...s Lists and Related Data SECTION 7 SCHEMATICS PARTS LISTS AND RELATED DATA This section contains the schematic diagrams and a replaceable parts list of those assemblies of the 285B which are different than the Model 280B 7 1 7 2 ...

Page 201: ...r 19 i IIO V OAB I 201982A INTEGRATED CIRWI T DATA TyPE f Z4V GNO NC UI LFI333I 12 4 5 13 U2 LM378 14 1 4 10 II IZ U3 LM379 I 3 4 11 12_ 2 13 NOT S UNL ESS OT lER M SPECIFI I ALL RESISTORS VALu S AR IN O lMS 1 4W S 2 ALL CAPACli NC E VALUE S t RC IN uFo 3 ALL TRANSISTOR AR E 2 lSOB 7 REF DE SIC NA O J LAST U5 O NO U D R49 I c 7 QS U3 T I p E I 8 I 7 1 Two Ch ann el Amplifier Schemat i c Diag ram W...

Page 202: ...BIOI mTAPE 8REAK o 0 t5V SWITCH T8102 I o 0 24 V 0 T i5A PIOI REF T81038 TAPE BRE AK CKAS GND TAPE JIOI BREAK f D 5V JI04 OJ II il N B B B 2 tlV B EJ 8 I 1 1111 I co F 1 l JP20 208 CIOI CI02 0 0 CI0 3 4UF 4UF 4UF 9 7 JI08 TORQU BRAKE f3l REF i 9 24V MOTION 1 10TOR SOL ENOID REF CAPSTJ l l0 l iR I l l PIIO fi F REF DES _ CT ROM CS DIRECnt PI07 If 6 ORN INVERTER PLUG _ I H_T _O 11 Lfl s r NOT USED P...

Page 203: ...34 ffl LI NE OUTPUT CHAN NEL 2 NOT S I AC VOlTA GES ARE S V AC oJUMPER WIRe PROVIDED rOR OPTIONAL VOLTAG E S Lr CTION T81 r I SPEAKER OUTPUT 2 CHANNEL I COMM 3 141 SpeAKE R OUTPUT I2J CHANNEL 2 VOLTAGE rROM TO 05 T153 2 T83 5 r 5 TB3 2 TB3 4 125 T83 2 T83 _ 3 220 TB 3 2 T82 0 2 40 T83 2 T152 5 RL r De SI GNATION LAS T US D NOT USCG 2 02 FJ TJ lRU FlOO 1 TNRU 5 2 00 520 7 63 7201 71 THRU noo J20 1 ...

Page 204: ... PI 32 I L 16 1 U T 1 S 17 1 p V 1 v T U R 1 8 t r A 5 r E t r B 6 E F t F 7 H H J 1 1 1 Iii JI 141 ABC D1 202662 F X l 2 W Y l r g Y W b l X K N b 1 HA r CW L I R c J t VU HU rr i I j 4 5 1 2 3 T 5 1 7 f 87 1 519 871 I I II 5 9 I M 01 TRANSPORT CO ROL CHASSIS ASSY 202351 POw q SUPPLY ASSY 2019 77 Figure 7 4 Audio Interconnect Harnes s As s embly 7 9 7 10 ...

Page 205: ...s Lists and Related Data SECTION 7 SCHEMATICS PARTS LISTS AND RELATED DATA This section contains the schematic diagrams and a replaceable parts list of those assemblies of the 285B which are different than the Model 28GB 7 1 7 2 ...

Page 206: ...i padded brs 111104 N P C1812 73484 10 1 1 1 Reel 10 5 met empty 0 25 112171 RB l 4xl0 5 66346 14 1 1 1 Console assy mono stereo 201931 01 18 1 1 1 Remote control assy panel mount see Fig 7 66 in 280B manual for bkdnl 200925 04 17 1 1 1 Remote control assy table mount see Fig 7 66 in 280B manual for bkdn 200925 03 21 1 1 Conversion kit stereo to FT mono 202390 01 11 1 1 1 Conn plug 15 hole 160040 ...

Page 207: ... trk 0 25 see Fig 7 13 for bkdn Head bridge assy stere o 1 4 trk 0 25 see Fig 7 13 for bkdn Capstan servo instl kit console see servo supplement Capstan servo instl kit rack see servo supplement Capstan motor kit 3 75 7 5 in s 60 Hz see Fig 7 20 in 280B manual for bkdn Capstan motor kit 7 5 15 0 in s 60 Hz see Fig 7 20 in 280B manual for bkdn Capstan motor kit 3 75 7 5 in s 50 Hz see Fig 7 20 in 2...

Page 208: ...i ned P in c h 1 011 1 1 ssy 0 2 tape s e iCJ 7 21 I II 28 013 mo nUi1J ror bkcJ n Ree stabi l l zcr Cl SSy 0 2 ta pc s ec Fi g 7 14 for hkd n Til l br c l k d rill LlsSy 0 2 tupc sec l i9 7 23 Ln 280B m tl ll U 1 J D r l k un Reel knob ClSc Y Lu be aucl i o u j Iu b re l I c rd C r i nCJ Serc nil 6 1 2 x 1 4 icr w b t 1 lei JO 32 x r 8 SeIL w r h 8 3 2 2 x Scr e w ovh J 2 x 3 4 Screw pnh 12 x 1 4...

Page 209: ...ansport assy cont inued 2023 66 50 1 1 Kno b concentri c inner 112 445 PC 1N18 23 480 51 1 1 Knob concentric outer 112444 2N2BC 23480 52 1 Knob 162421 PC2M2B 23 480 2 53 2 2 Cabl e tie mount adhesive 1622 28 ABMS AD 06383 54 8 8 8 Ca ble tie nylo n 0638 3 162198 SSTHI MP06 38 3 56 1 1 1 Dummy plug assy inverter 202376 ...

Page 210: ... 53 54 where applicable to prevent I interference vvi th moving parts Orient capstan motor servo with leads exiting where shown Capacitor supplied with tem 9 thru 12 installed in relay chassis A item7 8 E Apply item 55 adhesive to each corner of motor shield part of item 9 12 V I I 3e Use this plug item 56 in lieu of the plug supplied with items 9 12 o 5 E r 7 f2 i If F F iJ l e 7 6 rr a 3 C C A8 ...

Page 211: ... l_ CD _ J J t r 0 Q r tQ t r 11 rj I I I q i I r O I I I I L L L W c 1 II I 1C VIII i 1 I O l I _ j I I I I I I o I I o CO N 0 N o N ...

Page 212: ... 1 7 fo r bkd n Power supply a s s y see 1 5 1 20169 3 01 supp l y see Fig 7 28 in 280B manual for bkdn Torque motor brake assy 1 6 1 201713 01 takeup see Fig 7 29 in Torque moto r bra ke assy 7 1 1 28 0B manu a l for bkdn 5020 104 00 11 7 30 in 280B ma nua l f or bkdn ATL l i nk a ge assy see Fig 1 1 8 5020 1040 0 5 1 assy Head p latf orm base p late 1 1 9 508010402 01 He a d bas e plate 1 1 5020...

Page 213: ... 16 UNF 111123 22 8 8 Lockwasher int t 10 111025 23 1 1 Spacer brass 6 32 x 0 375 1 4 od 112058 2121 83330 13 2 2 Torque space r 502060002 24 4 4 Screw pnh 6 32 x 3 4 110180 25 1 1 Washer flat nylon 111131 NW25 6874 95987 26 4 4 Screw btnhd 10 32 x 1 00 110132 27 5 5 Screw pnh 6 32 x 1 2 110175 28 2 2 Screw pnh 8 32 x 5 8 110083 14 1 Transport assy se e bkdn control chassis Fig 7 8 for 202351 01 1...

Page 214: ...d e 1 285 B BOTTOM VIE W 4 Cl 09 24 LX 8 REF o oI O t o o 6 08 n 5 4X NOTE i P SS 1 NUM LR I 10L 104 XX 2 Wlli p lO C r LE S R i OV ITT O COR CL RIT i XI 22 Fi J I T1 l E l i 1 i Ii 1 vi 7 21 7 22 202364B ...

Page 215: ...Hodel 2SSD T OP VIEW 26 4 29 2X o o e e o 27 REF 9 II 2 X 17l 8X t F ig r t 7 _ 7 _lf rt b Z J 2 f 2 2023646 7 23 7 2 4 ...

Page 216: ... 1 1 Lockwasher int t 3 8 111027 8 5 5 Lockwasher int t 6 111023 9 1 Harness assy audio stereo see Fig 7 12 bkdn for 201979 02 10 1 Harness assy audio mono see Fig 7 12 for bkdn 201979 01 11 2 2 Washer flat 6 111003 12 5 5 Nut 6 32 kep ext x 5 16 lockwasher 111063 13 2 2 Cable back tie mount adhesi ve 162228 ABMS AD 06383 14 17 17 Screw pnh 6 32 x 1 4 110174 15 5 5 Spacer 6 32 unc x 0 75 112055 16...

Page 217: ... 1 R fJ I l S t 110 A A Ti2t I JSpukT LOGIC P 7 L SSY S I C D B 1 I K TAMP IN APf C X LOC ATIOf J SI O IIVN XUIOI AP PL Y iTEM z LI CR A lL TO ITE M It ol TALL LOCKI V ASI IEH A uO Ai IT r A 1 G Q OJT510E or t IA S Ir i w J n ART5 SuP lED JUI TH H lRhf 55 0 0 2X 5cq C2 A A Figure 7 8 Tr a sp o rt l Chas 8 i Con tr Assembly 2023518 7 25 7 26 ...

Page 218: ... sw control chassis 202331 01 3 S105 5 108 SllO 5 Sw pushbutton 162183 01 748510 04426 4 S101 S104 2 Sw rotary 162151 1575 VA 04009 I 5 S103 1 Sw rotary 162133 1565 XC 04009 7 Ref S105 S106 2 Pushbutton blu 162185 01 931313 04426 8 Ref S108 1 Pushbutton grn 162186 01 931314 04426 9 Ref S107 1 Pushbutton wht 162187 01 931311 044 26 10 Ref Sll O 1 Pushbutton yel 162188 01 931315 04426 II Ref S105 S1...

Page 219: ...7 9 14 162222 Term strip solder 2 pt 863 83330 TB 10 2 TB 101 TB 103A 3 15 Term strip solder l pt 1 51 B 71785 TB 103B 162087 16 1 Socket xstr raised boss 152064 8080 1G3 91506 xu 101 23 3 Lockwasher int t 3 8 lll027 19 1 Harness assy xport control 202345 01 logic see Fig 7 ll for bkdn 20 1 Harness as s y xport contro l 202344 0 1 Power see Fig 7 10 for bkdn ...

Page 220: ...lO N N N u r S JP L E i T r I 5 I TC J TO RE 1AIN ON T 1 S S ID PA NE L 4 DW N Q 3 o M O O I I Y E 1 f I It AL T R I P 2 OIN By Wt I I N Te M 11 l V 1 C S Ol rC 2C AW c Tt i U R lvE T 4 LE5 01 IT M 14 A ND SO DE 3X A S r4c w N N D E A IL EF TI3 I0 3A T B 3 l M 5 N A I ST E P I PO I N T TO BE 10 D I ED e v SOL E IN G C M I W R e SOL ID 2 0 W sO I e H RI I l r 1 l O t E S r I r M tS J Il A R TO TB 1...

Page 221: ...Rl 27264 3 Jl03 Jl06 2 Conn rcpt 9 holes 160004 1625 9R 27264 4 Jl07 Jl09 2 Conn rcpt 12 holes 160049 1625 12Rl 27264 5 Jl02 1 Conn plug 15 holes 160040 1625 15P 27264 7 P203 P204 15 Term sq wire crimp style 160000 2378 T 27264 8 Jl02 15 Term pin 0 062 dia male 160030 1854 27264 9 Ref Cl0l Cl03 8 Term ga qdisc 0 250 22 18 160016 AA 1l40 98410 10 30 J l03 J104 Jl06 Jl07 Jl09 Term pin female 22 0 06...

Page 222: ...q l 2 109 I 1 lA 1 1 4 J t 3 0 C IX T 5 CIO 1 7 6 J I 4_ 7 j c I 1 J s 0 3 ClO J1 J 7J NOTES A 5SE 8 Y U i 8EJ 6 2 02344 Ol Z t ERcvCE NS 6A A cWS ON CL oI v CTORS 3 wlflE J lU YfBtR5 J OT USED 9JJ JI J M n 4 2 u t 1 1 4 14 Jiii7J 7l o 202344A 7 31 ...

Page 223: ...n sq wire 6 holes 160022 2139 6 2 27264 2 p202 P205 2 Conn sq wire 12 holes 160024 2139 12 2 27264 3 J10l J108 2 Conn plug 3 holes 160035 1625 3P 27264 5 Jlll 1 Conn rcpt 15 holes 160050 1625 15Rl 27264 6 Ref P202 P205 P207 P208 32 Term sq wire crimp style 160000 2378 T 27264 7 Ref J10l J108 5 Term 22 ga pin 0 062 dia male 160030 1854 27264 8 Ref J109 Jlll 13 Term pin female 0 062 dia 160031 1855 ...

Page 224: ... Ja 2I IT r k J JI I i j J 0 ffi 1 I I IO ll l 1 21 H J1 I _ 0 G Z f f1 J JIII 0 12 1 VerE5 RlA J jV PS N T f W t l l 6 30 7 IO tl 4 J 7A 1 SI S 3 202345 Fig uroe 7 11 Horn e ss As s en bly Tro onspo ro t ControoZ Logi c 7 33 7 3 4 ...

Page 225: ... I0 k r1 Solder lug 3 8 dia hole Jack phono mono 3 cond Re s var lk 0 audio tape r 2019 79 02 160210 162396 156098 162159 16204 2 156115 i r r P AnT 1 RT O l 201979 01 66105 4 14 B LM 21 98 L1 2A 70AIN132P 103R CO E InE T 0 00779 82389 71450 82389 011 21 20 0 I I TI r o _ jL 12 UI 24lt 01 I _ l t I 1 y T S I I DEh Tl T Y f S E t 1B Y NUfY1 c 2 f 17 XX BY 7AC7 J Do NOT OQ E SS WIRE AC R O S C Et JT...

Page 226: ...ely 502010102 01 3 1 1 1 Scrape filter assy 0 25 see Fig 7 20 for bkdn 201929 01 4 2 2 2 2 2 2 2 2 2 Dummy hd stack assy Dummy hd assy Hd mtg block 202341 01 202343 01 200581 01 4 4 4 Setscrew ovp 6 32 x 1 4 110110 4 4 4 Screw pnh 6 32 x 3 4 110074 5 1 PB hd stack assy FT 0 25 see Fig 7 18 for bkdn 202348 01 6 1 PB hd stack assy 2 trk 0 25 se e Fig 7 39 in 280B manual for bkdn 200579 02 7 1 PB hd ...

Page 227: ...I o I I I T I I Il l I a T I 01 01 S II I 0 MU T er P RALI I I TO HEAD Mod e l 285 B 4X F T EDGE OF eR D E PL ATE 2023658 P gure 7 13 He d Br lge Assemb l y 7 37 ...

Page 228: ...m 7 1 501030302 01 Base section tape guide 1 8 501030302 02 Top section tape guide 1 9 501030302 03 Spacer tape guide 0 25 1 10 5555 25 79136 112106 Grip ring 12 1 79136 5555 31 Grip ring 112127 13 1 N5000 102 79136 Retaining ring 112128 2 14 77039M3BT2 29337 Bearing ball 112006 2 15 W0492 007 S 70472 Washer spring 0 350 id x 111029 16 1 0 492 od 97015 73734 Washer thrust 0 260 id x 111019 2 17 0 ...

Page 229: ...E IT E M 1 0 W IT I ITEM 4 APPL I EM L L BE TWE r J i OLlC 1 0 11E M I A toJ 0 S I I F I H M G ItoJSTALL ROLL P I N ITEN L 1 0 IOUe I G l ITUIA I 0 RIO A IN STAe IL LE R PR INb liLM w DfU 01 Ji R o I Ot l 0 1 L i ROLL PI f lOULO PRO T RllDF_ O 0 1 IN 2025678 7 39 7 40 ...

Page 230: ... 202338 01 3 1 Harness assy audio intcon see Fig 7 19 for bkdn 201987 01 4 1 Bushing OPEN CLOSED 11 2498 OCB 875 28520 5 2 Guide PWB 1 62155 RAD4 1 25 07556 6 4 Screw pnh 4 40 x 1 4 110060 7 2 Screw pnh 4 40 x 1 2 110062 8 4 Washer flat 4 111002 9 2 Nut 4 4 0 kep ext l oc kwasher 111062 10 4 Lockwasher int t 4 111022 J I1 4 REF r I__ _ l JI30 201985A REI Fi gure 7 15 Play EZ e tr on i c s Assemb l...

Page 231: ...R4 6 R4 7 R27 6 Res carb 2 k l 5 1 41 l 149098 R32 1 4W R44 R4 5 R31 4 Res c arb 2 2 k l 5 149091 R1 8 1 4W Rl 7 2 Res carb 3 3 k r 5 R4 1 2 Res carb 8 2 k ll 5 149074 R4 3 1 4W 14 9013 R3 0 R29 2 Res ca rb 22 k l S 1 41 l 14901 2 R1 6 R15 2 Res ca rb 47 kQ 5 1 4W R39 2 Res carb 56 kll 5 1 4W 149048 R40 R4 2 1 Res carb 100 k ll 5 149073 1 4W R5 4 Res carb 330 k l 5 149067 R6 1 4W Rl 1 R12 R25 4 Re...

Page 232: ...near 154019 LM379M 27014 Tl T2 2 Xfmr 600 line 2 57006 S 81 X 81095 TP1 TP3 3 Test point 162203 7030B 7 88245 Cl C2 2 Cap 50V cer mono 470 pF 163090 UR15155050 471K 80031 C5 C6 C9 Cl0 4 Cap 50V cer mono 0 001 F 163087 lC067102X 9500C4 56289 C17 C18 C25 C26 4 Cap ceramic mono o 033 F 50V 163085 2C067333X 9500 56289 C7 C8 2 Cap poly film 10 80V 0 01 F 167028 192Pl039R8 56289 C19 C20 2 Cap Ta 4 7 F 2...

Page 233: ...164072 1000 25 8218 25088 C33 1 Cap e1ct1t 2200 F 40V 164073 2200 401 820E 55 Re f Tl T2 2 Spacer insulator 202333 01 53 2 Washer ext t 4 111032 54 2 Screw pnh 4 40 x 3 8 110172 56 Ref U3 1 He at sink PCB mount 162397 641 90372 57 Ref U3 4 Spacer 3 8 od 6 x 3 16 long x 112446 8734 83330 58 5 Screw pnh 6 32 x 1 2 110175 59 8 Washer flat 6 111003 60 7 Nut kep 6 32 x 5 16 111063 61 1 Spacer phenolic ...

Page 234: ...2 _A w AS E l 1 f c OR c I _ 2J 1 p l _D1 RI j I 1 E E S J I o R O P E R L E C R Ic A t CNN C T I C N f ND A u i E E c C jr T i i qMA o C ON DU C T I O I y Tt v 2 BE A __V O f 3 Zl vf I IOT SOL OE R l ii I1 T 5 1I JK TABS 0F I II t le t NK L1 N T C c E 1 E OI 0 e E t Lr E L C A _ 6 A v TelY 3 0 T E r c e C T A T C loC l _ G j4E F o C C u R v n I Fi 4 4E I K T 1 1 0 BOTI I jl 1E C E L D 1 rE I t 3G...

Page 235: ...26 pos i tion 13 Ref J132 18 Skt contact female 14 Ref J132 1 Skt guide center female 15 Ref J132 1 Pin guide center male 16 P102 1 Conn rcpt 15 hole 17 J201 1 Conn ac power 18 12 Term pin female 0 062 di a 19 Pl09 1 Conn 12 pin 20 Ref Pl09 2 Pin conn male 201977 01 201935 01 202756 01 201936 01 162297 202719 01 202334 01 160220 162304 160066 160208 160210 160212 160213 160050 160125 160029 160039...

Page 236: ...cable adhesive backed Cord a c power Screw flh 4 40 x 3 8 Screw pnh 6 32 x 1 2 Screw pnh 6 32 x 1 4 Screw pnh 6 32 x 3 8 Screw truss hd 6 32 x 1 4 Screw pnh 8 32 x 3 8 Screw pnh 4 40 x 1 4 Nut hex machine 4 40 Nut keps ext lockwasher 4 40 Nut keps ext lockwasher 6 32 Washer flat 8 Lockwasher ext t 4 Lockwasher int t 6 Washer flat 6 Lockwasher ext t 8 201977 01 162008 162420 162111 112136 112315 11...

Page 237: ...t _ I j r r l 1 CI I J Jr _L T R l1 rJ It wIA i r l C G A h C NI J r N 0 1 1 r 1 1 1 1 rl l H f 1 11 1 1 I11r I N f I I II let R f I _ tD l IIJAlr W IP I 5 1 JI r II I N r M CK t I F rn I I 1 t I j I Y S 0 C 1E 11T I L T H I 1 0 1 i J D o j J 1 v tl t r oA I J c S f Ci l_ r r AC I 4 t _ T 11 E Fi gu r e 1 17 Peuer SuppZy A SGe bL 7 49 7 5 0 201977C ...

Page 238: ...form 4 1 202347 01 125 220 Head cable assy 5 1 02660 160032 P139 070 Conn p lug 9 pin 1 11983 161056 110074 Cable w plug 1 Sere pnh 6 32 x 3 4 2 6 110110 Setscrew ovp 6 32 x 1 4 7 2 11 2509 1100 76 Spring compression 1 8 Screw pnh 6 32 x 1 00 1 9 8 ZX 1 I NoTE 2 IDENTIFY ASSEMBLY NUMBER A OJ 2023 4 8 01 By INK iTi M APPRO WHERE IOWN oCONNECTOR K Y WA Y o ENrA TJ N 5H O vVA 202348A Figu f e 7 1 8 P...

Page 239: ...26 pas 2 2 00779 66103 4 Re f Pl3 1 P132 160211 Contact pin male 3 42 0077 9 200389 4 Ref P131 160213 Pin guide center male 2 4 p 13 2 200390 4 00779 Ref 160212 Socket guide center 2 5 female P1 3I Pl3 2 00779 Ref 11 243 1 201229 1 Clamp strain relief 2 6 short Pl31 P13 2 12 6 221 16 0089 02660 J 114 Conn female 9 pin 7 1 0 I _ _ _ J l o ORIENT PIN A THI S END 0 fOt J I 1 l32 IrEM 4 THIS EN D 8 o ...

Page 240: ...237 556 32 Class 3 FCHHE LO l 5555 1 8 PCG 4 31633 79136 1 3 4 6 1 2 1 1 Mount scrape filter Bearing flanged ball 0 1875 id x 0 3125 od Roller scrape fil t e r Grip ring 2 X NOTES 1 Assembly part no s 201929 01 2 Install items 3 4 on shaft as shown and secure with item 6 Assembly to be free of end play w th tem 6 properly nstall ed 2019298 F o u r e 7 O Sc ra pe Filter Mount ABsembly 7 53 7 54 ...

Page 241: ... 1 I j I 1 a It I 1M j 01 J III t l 0 I i i l I I I ...

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Scully 280B Series, Instruction And Maintenance Manual

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