Sanyo VHR-H772EV Service Manual Download

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DECK MECHANISM ADJUSTMENT

4-15

4.Guide Roller Height Adjustment

Adjustment Procedure

1) Confirm if the Tape runs along the Tape Guide Line of the

Lower Drum.

2) If the Tape runs the Bottom of the Guide Line, turn the Guide

Roller Height Adjustment Screw to Clockwise direction.

3) If it runs the Top, turn to Counterclockwise direction.
4) Adjust the Height of the Guide Roller to be guided to the

Guide Line of the Lower Drum from the Starting and Ending
Point of the Drum.

Purpose: To regulate the Height of the Tape so that the Bottom of the Tape runs along the

Tape Guide Line on the Lower Drum.

Test Equipment/ Fixture

• Post Height Adjusting Driver

Test Conditions (Mechanism Condition)

• Play or Review Mode

Adjustment Point

• Guide Roller Height Adjustment

screws on the Supply and Take-Up
Guide Rollers.

Fig. C-4-1

Upper Flange

Guide Roller
Retaining Screw

Guide Roller Height
Adjustment screw

ADJUSTMENT DIAGRAM

Test Equipment/Fixture

• Oscilloscope
• Alignment Tape
• Post Height Adjusting

Driver

Test Equipment Connection Points

• CH-1:PB RF Envelope
• CH-2:NTSC: SW 30Hz

PAL: SW 25Hz

• Head Switching Output

Point

• RF Envelope Output

Point

Test Conditions VCR(VCP) State

• Play an Alignment Tape

Adjustment Point

• Guide Roller Height

Adjustment Screws

Fig. C-4-2

Fig. C-4-3

P3 POST
ADJUSTMENT

P2 POST
ADJUSTMENT

Turn the Roller Guide Height
Adjustment Screw slightly
to flatten the waveform.

Tracking control at center

RF ENVELOPE OUTPUT TEST POINT

OSCILLOSCOPE

HEAD SWITCHING OUTPUT TEST
POINT

Turn(Move) the tracking
control to both directions

4-1. Preliminary Adjustment

4-2. Precise Adjustment

Adjustment Procedure

1) Play an Alignment Tape after connecting the Probe of the

Oscilloscope to the RF Envelope Output Test Point and
Head Switching Output Test Point.

2) Tracking Control(in PB Mode) : Center Position(When

this Adjustment is performed after the Drum Assembly
has been replaced, set the Tracking Control so that the
RF Output is Maximum).

3) Height Adjustment Screw : Flatten the RF Waveform.

(Fig. C-4-2)

4) Turn(Move) the Tracking Control(in PB Mode)

Clockwise and Counterclockwise.(Fig. C-4-3)

5) Check that any Drop of RF Output is uniform at the

Start and End of the Waveform.

If the adjustment is excessive or insufficient the tape
will jam or fold.

NOTE

Waveform Diagrams

Connection Diagram

Summary of Contents for VHR-H772EV

Page 1: ... 143 182 31 U K KR2LN EV4 SP2 PR E2 EV3 IR2 PAL Spain Portugal VHR H772EV Product Code 143 182 32 Europe VHR M292EV Product Code 143 182 33 Europe VHR M292IR VHR H772SP Product Code 143 182 38 Product Code 143 182 35 39 Ireland VHR H792E Product Code 143 182 29 U K VHR H792IR Product Code 143 182 37 Ireland Spain Portugal VHR H802E Product Code 143 182 30 U K KR4HN EV SP PR E IR E2 ...

Page 2: ...uit 3 2 ELECTRICAL TROUBLESHOOTING GUIDE 3 4 1 Power Circuit SMPS 3 4 2 Servo Circuit 3 7 3 System Front Panel Circuit 3 10 4 Y C Circuit 3 12 5 Tuner IF Circuit 3 16 6 Hi Fi Circuit 3 19 BLOCK DIAGRAMS 3 21 1 Power Block Diagram 3 21 2 Tuner IF NICAM A2 Block Diagram 3 23 3 VPS Block Diagram 3 24 4 Y C Block Diagram 3 25 5 Hi Fi Block Diagram 3 26 6 System Block Diagram 3 27 CIRCUIT DIAGRAMS 3 29...

Page 3: ...tment 4 14 3 Checking Torque 4 14 4 Guide Roller Height Adjustment 4 15 4 1 Preliminary Adjustment 4 15 4 2 Precise Adjustment 4 15 5 Audio Control A C Head Adjustment 4 16 5 1 Preliminary Adjustment 4 16 5 2 Confirmation of Tape Path between Pinch Roller and Take up Guide 4 17 5 3 Precise Adjustment Azimuth Adjustment 4 17 6 X Value Adjustment 4 17 7 Adjustment after Replacing Drum Assembly Video...

Page 4: ... LD LED LD VTG CTL Loading Voltage Control LECHA Letter Character L M Level Meter LP Long Play LPF Low Pass Filter M MAX Maximum MD Modulator MECHA CTL Mechanism Control MIC Microphone MIN Minimum MIX Mixer Mixing M M Monostable Multivibrator MMV Mono Multi Vibrator MOD Modulation Modulator MODEM Modulator Demodulator MPX Multiplex N NR Noise Reduction O OSC Oscillator OSD On Screen Display P PB P...

Page 5: ...s and those specified for compliance with various regulations regarding spurious radiation emission 3 Use Specified internal wiring Note especially 1 Double insulated wires 2 High voltage leads 4 Use specified insulating materials for hazardous live parts Note especially 1 Insulation Tape 2 PVC tubing 3 Spacers 4 Insulation sheets for transistor 5 Observe that wires do not contact heat producing p...

Page 6: ...el only Note This table is unofficial and for reference only Be sure to confirm the precise values for your particular country and locality Leakage Current test Confirm specified or lower leakage current between B earth ground power cord plug prongs and externally exposed accessible parts RF terminals antenna terminals video and audio input and output terminals micro phone jacks earphone jacks etc...

Page 7: ... of Power Control and Timer Control are switched to Low As a result POWER Switching TR is kept from generating heat and fire POWER for each IC 5V POWER Modulator 5VT POWER AVCP IC Short protection off mode DJ01 Diode in PROPOSAL FOR APPLYING SHORT PROTECTION IIC BUS 5VT SW POWER CONTROL MASTER TIMER CONTROL 5VT SW SLAVE with 5V SLAVE with 5V 5 3VA Timer Control AVCP IC TUNER Conception BLOCK Diagr...

Page 8: ...t from that for cus tormer s country MP KEY In case of PAL VCR if holding the REC button on the front panel and the CLEAR button on the remote control handset for 5 7 seconds with power being switch all and no tapes OK is LED becomes on This is the state that initializing EEPROM is finished MP KEY s function MP KEY sets EEPROM s data up to the initial state SERVICE NOTICE ON REPLACING EEPROM TIMER...

Page 9: ... F1 00000000 OPTION5 50 00000000 OPTION6 08 00000000 VHR H772SP OPTION1 7C 00000000 SPAIN OPTION2 C0 00000000 OPTION3 81 00000000 OPTION4 F1 00000000 OPTION5 50 00000000 OPTION6 08 00000000 WR OK I EXIT MOVE F G EDIT DE 1 DETECT NEW EEPROM OPTION EDIT SCREEN Eeprom EDIT screen automatically appears if replacing Eeprom For SANYO model change a remocon key by using fol lowing JIG key SANYO MODEL FRO...

Page 10: ...CIR standard 625 lines 50 fields PAL colour signal Recording format PAL B G VHR M262EV M292EV H772EV VHR M272SP SPAIN H772SP SPAIN M272SP PORTUGAL H772SP PORTUGAL PAL I VHR M292E H792E H802E PAL I I VHR M292IR H792IR Input level VIDEO IN SCART RCA type 1 0 Vp p 75 ohm unbalanced Output level VIDEO OUT SCART type 1 0 Vp p 75 ohm unbalanced Signal to noise ratio More than 43 dBm Audio Input level AU...

Page 11: ......

Page 12: ...o No 1 Re assembly Flow 3 Place the unit like Fig 2 1 4 Check and replace Electrical parts NOTE 1 Insert Video Cassette Tape inversely like Fig 2 1 to check and replace defective parts 2 In disassembling and reassembling be careful not to damaged CST switch Timer C B A Main C B A Housing Deck Assembly Timer C B A Housing Deck Ass y Cassette Tape Upside Down Main C B A Positioned Upside Down ...

Page 13: ... 452 330 323 A43 283 280 284 300 T U 7 0 1 T U N E R 2SCART 1SCART 452 320 452 452 A42 A49 250 462 462 A00 LED502 LED501 457 464 A 5 4 3 2 1 B C D NOTE Refer to SECTION 5 REPLACEMENT PARTS LIST in order to look for the part number of each part _ OPTIONAL PARTS ...

Page 14: ...S CABLE SET ASS Y Optional parts 810 806 REMOCON 900 PACKING RF 803 PACKING LF 803 BOX CARTON 802 BAG SOFT SHEET 804 INSTRUCTION MANUAL 801 NOTE Refer to SECTION REPLACEMENT PARTS LIST NOTE in order to look for the part number of each part 2 3 ...

Page 15: ......

Page 16: ...RT JACK Hi Fi SYSTEM AVCP Micom T U N E R Speak ez SW IC SECAM VPS EEPROM CLK IC W501 H S W E2PROM C S M P S A V W502 DISPLAY DOT CLK Measurement point Adjustment point SECTION 3 ELECTRICAL ELECTRICAL ADJUSTMENT POINTS ARRANGEMENT ...

Page 17: ...LK LED TRK is a Initial c press Front Play key on set and 0 key on Remocon again Then check the blink OFF ON on CLK LED Then check blink PG waveform on oscilloscope Check the PG a Connect the CH1 of the oscilloscope to the H SW and CD2 to the Video out for the VCR b Trigger the mixed Video Signal of CH2 to the CH1 H SW W501 W502 and then check the distance time difference which is from the selecte...

Page 18: ...LECTRICAL ADJUSTMENT PROCEDURES WAVEFORM Attension and Reference a The PG checking must do when RF Level is Maximum and SERVO system is Locking MTR MODE b V H SW Level is 2Vpp H SW Composite VIDEO 6 5H 416us ...

Page 19: ... 7 Is there DC voltage at the IC101 Pin 4 Is there about 2 5V at the IC103 Vref Is the D106 normal Check the Main PCB 5 3VA Line short Replace the F101 Use the same Fuse Replace the BD101 Replace the R101 Is Vcc about 13 15V permittable at the IC101 Pin 3 Check or Replace the D103 Replace the IC102 Replace the IC103 Replace the D106 NO YES YES YES YES YES YES YES YES NO NO NO NO NO NO NO ...

Page 20: ...s 5 3VA work normally Check whether 5 3VA is out of order YES NO NO 7 Power Circuit SMPS 2 No 12VA Capstan 3 No 12VA CANAL Buffer Is Voltage about 12V put into the Q155 C Check or Replace the Q155 YES YES No 12VA Is Vcc about 13VA put into the Q155 E Replace the Peripheral Circuitry of D160 YES NO ...

Page 21: ...out 4 7V put into the Q152 Q151 Base Check the Q163 Q162 whether it works normally Check or Replace the Q152 Q151 YES YES No 5VT 5V Is the Q163 Q162 Base H Is 5 3VA put into the Q152 Q151 collector Check the µ com Control YES YES NO NO 3 6 ...

Page 22: ...pear at IC501 pin 8 Does the CFG divide waveform appear at IC501 pin 9 Do the CTL pulses move when TRK is operated Replace IC501 Does the Video Envelope waveform appear at IC501 Pin 24 NO YES YES YES YES YES A Is the height of the CTL Head adjusted correctly NO Replace IC501 NO Check AVCP IC NO Adjust the CTL Head ...

Page 23: ... PWM waveform appear at IC501 Pin 107 Check the Components and foil Pattern Connected to IC501 Pin 107 PMC01 Pin 12 for shorts Do DFG Pulses appear at IC501 Pin 104 B NO NO NO NO Check Power Does Drum PWM appear at IC501 Pin 107 Do DFG Pulses appear at PMD01 Pin 3 Check Drum Monitor Ass y Check the Components and foil pattern between PMC01 Pin 11 and IC501 Pin 104 for shorts Replace IC501 YES YES ...

Page 24: ...e IC501 Does 13VA appear at PMC01 Pin 2 Does 2 8V appear at PMC01 Pin 9 Check Connector and Capstan Motor Ass y Check the Components and foil Patterns Connected between IC501 Pin 108 and PMC01 Pin 9 for shorts Does the CFG signal appear at IC501 Pin 9 Does Capstan PWM appear at IC501 Pin 108 Check the components and foil pattern connected between IC501 Pin 108 and PMC01 Pin 9 for shorts C NO NO NO...

Page 25: ...Signal Do Take up reel pulses appear at the base of Q514 Replace the Take Up Reel Photocoupler in the Deck RS501 Auto stop Does SW30 waveform appear at IC501 Pin 105 Do Take up reel pulses appear at IC501 Pin 49 Change IC501 A NO NO NO NO YES 3 System Front Panel Circuit 3 10 ...

Page 26: ...d by lack of lubrication due to dried grease or oil Is 5 4VA applied to R544 Check the power Check IC501 Pins 68 69 70 71 Check the CST SW and peripheral circuitry Check the power B NO NO NO YES NO YES Non working finction buttons Is the voltage of IC501 Pin 36 5V Does LED Ass y display change when a function button is pressed Replace IC501 Replace the defective switch Check the power Check IC506 ...

Page 27: ... signal appear at the Emitter termi nal of the Q307 Q308 Check the 5 2VT 5 4VA Line Power Circuit Is I2 C BUS signal applied to the IC301 Pins 68 69 Check C316 AGC Chck the path of the signal between the IC301 Pin 5 and IC501 Pin 17 Replace the IC301 Does the 12VT 5 4VA appear at the Emitter termi nal of the Q307 Q308 Replace the Q307 Q308 Check the 12VT 5 4VA Line Power Circuit Check the System C...

Page 28: ...1 Pin 105 Check the V H S W level Check R303 R304 Replace the IC301 Refer to SYSTEM I2 C BUS CHECK Trouble Shooting Is the V H S W signal applied to the IC301 Pin 70 Is V H S W H about 3 4V at the IC301 Pin 70 Clean the Drum Check the path of the Y Luminance RF signal Check C327 Check the path of the Y Luminance RF signal Check the C312 Does the Y Luminance RF signal appear at the IC301 Pin 76 Is ...

Page 29: ...or signal appear at the IC301 Pin 25 Check the line of the 5 2VT 5 4VA Line Power Circuit Replace the X301 Check the Color Pass Check the Color Rotary Circuit IC501 pin 99 Check the Color Rotary level Check the R303 Does the X301 4 43MHZ oscillate Replace the IC301 Does the Color signal appear at the IC301 Pin 21 Is Color Rotary H about 3 4V Replace the IC301 NO YES YES YES YES NO NO NO NO NO YES ...

Page 30: ...e System of REC H the IC501 Pin 47 the D301 Replace the IC301 Check the line of the 5 2VT 5 4VA Line Power Circuit Check PB Mode Is the REC H signal about 4V applied to the IC301 Pin 80 Check the circuit of the IC301 Pins 85 86 Check REC Luminance Pass Color Pass Does PB Mdoe operate normally Does the REC RF signal appear at the IC301 Pins 88 89 94 95 Check the Drum Drum Connector YES YES YES YES ...

Page 31: ...0VT applied to TU701 Pin 16 Is 5VT applied to TU701 Pin 13 Does the Clock signal appear at TU701 Pin 11 Does the data signal appear at TU701 Pin 12 Replace Tuner Check the signal flow from TU701 Pin 24 to IC301 Pin 67 Does Sync appear at IC501 Pin111 Check the signal flow from IC501 Pin19 to JK901 Pin19 YES YES YES YES YES YES YES NO NO NO NO NO Check the liC Data signal of µ com Pin 60 NO 3 16 ...

Page 32: ...01 Pin 18 Check the Tuner Audio signal at IC301 Pin 13 Check the Audio signal at IC301 Pin 11 Check 5VT power Chekc the signal flow from TU701 Pin21 to IC301 Pin 13 Replace IC301 NO NO NO YES YES YES Check the signal flow from IC301 pin 11 to IC901 Pin 6 YES ...

Page 33: ...the Audio of IC801 Pins 2 3 Check the Audio of IC801 Pins 18 19 Check the signal flow from IC801 pins 18 19 to JK901 Pins 1 3 Check 5V power Check the Tuner Audio of TU701 Pin 21 Replace X751 Check the IIC Clock and Data at IC751 Pins 12 13 Check the signal flow from IC751 Pins 30 31 to IC801 Pins 2 3 Check the IIC Clock and Data at IC801 Pins 42 43 YES YES YES YES YES YES YES NO NO NO NO NO NO ...

Page 34: ...hen Replace IC801 Check Ports of µ COM Replace IC801 Hi Fi Playback No sound Check the Hi Fi Selection Switch and the Tape quality Is the RF Envelope at IC801 Pin 44 over 2Vp p Check the Signal path of Audio Output Do Audio signals appear at IC801 Pin 16 L CH 17 R CH Check IC801 Pin 42 Data Pin 43 Clock A YES NO YES NO NO NO NO 6 Hi Fi Circuit Hi Fi Model YES YES YES YES YES ...

Page 35: ...ts of µ COM Check Audio input signal of IC801 Pins 2 3 TU A 6 7 Scart 1 Replace IC801 B Check IC801 Pin 42 Data Pin 43 CLOCK Do Audio signals appear at IC801 Pins 16 17 YES YES YES Do FM Audio signals appear at IC801 Pin 36 Check the Contact Points of Drum Connector if good then Replace the Drum YES YES NO NO NO NO 3 20 ...

Page 36: ...ssembly P4 Chassis Embossing A 5 T 17 Opener Lid Chassis Embossing A 5 T 17 18 Arm Assembly Pinch Shaft A 5 T 17 19 Lever T Up Arm T Up 1 Hook A 5 T 17 18 20 Belt Capstan Motor Capstan 3 Screw A 6 B 21 Lever F R Locking Tab A 6 B 20 21 22 Clutch Assembly D35 Washer A 6 B 23 Break Assembly Capstan Locking Tab A 6 B 24 Gear Drive Gear Cam Washer Hook A 7 B 25 Gear Sector 1 Hook A 7 B 20 21 23 26 Pla...

Page 37: ...e the Drum assembly 3 Unhook H1 H2 and separate the Holder FPC and Cap FPC 1 1 Drum Motor 1 Remove two Screws S2 and disassemble the Stator of the Drum Motor 2 Remove two Screws S3 and separate the Rotor of the Drum Motor from the Drum Sub assembly When reassembling confirm A portion of the Drum Sub assembly whether the Carbon Brush is in there or not Fig A 1 NOTE Fig B 1 Holder FPC Drum FPC Cap F...

Page 38: ...e Top Arm Assembly F L Spring Lever S W Gear Assembly Rack F L Chassis Opener Door Brackert Assembly L D Motor Holder Assembly CST B C D E H6 A B Lever Assembly S W H8 Fig A 2 Fig A 2 1 Fig A 2 2 Fig A 2 6 Fig A 2 7 Fig A 2 5 Fig A 2 3 Fig A 2 4 ...

Page 39: ...remove it through the guide hole of the chassis 5 Bracket assembly L D Motor Fig A 2 4 1 Unplug the Connector C1 2 Unhook three Hooks H3 H4 H5 on bottom side of the Chassis lift up the Bracket assembly L M and disassem ble the Bracket assembly L D Motor 6 Gear Assembly Rack F L Fig A 2 5 1 Move the Gear Assembly Rack F L in direction of arrow A and unhook the Hook H6 pulling back in front 2 Separa...

Page 40: ...e direction and lift it up 10 Head F E Fig A 3 2 1 Breakaway the A portion of the Head F E from the Embossing of the Chassis turn it to counterclockwise direction and lift it up 11 Base assembly A C Head Fig A 3 3 1 Remove the Screw S4 and lift the Base assembly A C Head up A Arm Assembly Cleaner Base Assembly A C Head S4 Head F E A Chassis Fig A 3 Fig A 3 1 Fig A 3 3 Fig A 3 2 ...

Page 41: ...mbly RS Fig A 4 2 1 Unhook the Spring RS from the Hook H10 of the Chassis 2 Lift the Brake assembly T up 14 Arm assembly Tension Fig A 4 3 1 Unhook the Spring Tension from the Hook H11 of the Arm assembly tension 2 Unhook the Hook H12 of the Base Tension and lift the Arm assembly Tension up Difference for Springs 15 Reel S Reel T Fig A 4 4 1 Difference for Reel S Reel T Spring TB Spring RS Spring ...

Page 42: ...akaway the B portion of the Opener Lid from the Embossing of the Chassis 2 Turn the Opener Lid to clockwise direction and lift it up 18 Arm assembly Pinch Fig A 5 3 1 Lift the Arm assembly Pinch up 19 Lever T up Fig A 5 4 Arm T up Fig A 5 5 1 Unhook the Hook H13 of the bottom Chassis and lift the Lever T up up 2 Lift the Arm T up up When reassembling confirm the C portion of the Arm assembly Pinch...

Page 43: ...apstan 2 Remove the three Screws S5 on bottom Chassis and lift the Motor Capstan up 21 Lever F R Fig A 6 3 1 Unlock the Locking Tab L1 as Fig A 6 3 and lift the Lever F R up 22 Clutch assembly D35 Fig A 6 4 1 Remove the Washer W1 and lift the Clutch assembly D35 up 23 Brake assembly Capstan Fig A 6 5 1 Pull the Locking Tab L2 back in direction of arrow and lift it up Fig A 6 1 Fig A 6 2 Fig A 6 3 ...

Page 44: ...he Gear Cam Hole B in a straight line after the Gear Drive Hole C is aligned with the Chassis Hole as Fig 25 Gear Sector Fig A 7 3 1 Unhook the Hook H15 of the Base Loading on bottom Chassis and lift the Gear Sector up 26 Plate Slider Fig A 7 4 1 Just lift the Plate Slider up 27 Lever Tension Fig A 7 5 1 Unhook the A portion of the Lever Tension from the Hook H16 of the Chassis 2 Turn the Lever Te...

Page 45: ...he two Holes of the Gear assem bly P2 and P3 in a straight line after confirmation whether the Gear Sector Hole A and the Plate Slider Hole B are aligned or not as Fig 30 Base assembly P2 Fig A 8 3 Base assembly P3 Fig A 8 4 1 Move the Base assembly P2 in direction of arrow A along the Guided Hole of the Chassis and disassemble it on bottom side 2 Move the Base assembly P3 in direction of arrow B ...

Page 46: ...ion Fig A 9 2 1 Breakaway the A portion of the Base Tension from the Embossing of the Chassis 2 Turn the Base Tension to counterclockwise direction and lift it up 33 Arm assembly Idler Jog Fig A 9 3 1 Make narrower the two parts A and B as Fig A 9 3 2 Lift the Arm assembly Idler up When disassembling be careful not to be caught the D part by the Chassis as Fig NOTE Fig A 9 1 Fig A 9 2 Fig A 9 3 ...

Page 47: ...00 D006 4 Torque gauge adaptor Parts No D09 R001 5 Post height adjusting driver Parts No DTL 0005 6 Type driver ø 5 2 Alignment tape Parts No NTSC DTN 001 PAL DTN 0002 3 Torque gauge 3 600g Cm ATG 3 Parts No D00 D002 SRK VIDEO CASSETTE TORQUE METER VHT 303 S R K V H T S SRK V HT T 300 250 200 150 50 0 300 250 200 150 50 0 100 ...

Page 48: ... is as below Fig C 2 4 Remove the Screw which fixes the Deck Mechanism and Main Frame and confirm if the Gear Cam is aligned with the Gear Drive as below Fig C 1 A 5 Confirm if the Mode S W on the Main P C Board is aligned as below Fig C 1 B 6 Remount the Deck Mechanism on the Main P C Board and check each operation Gear Cam Gear Drive C Mode S W B L D Motor Assembly Gear Cam Chassis Hole Gear Cam...

Page 49: ...aptor with the Torque Gauge affixed The Torque reading to measure occurs when the Tape abruptly changes direction from Fast Forward of Rewind Mode when quick bracking is applied to both Reels SRK VIDEO CASSETTE TORQUE METER VHT 303 S R K V H T S SRK V HT T 300 250 200 150 50 0 300 250 200 150 50 0 100 Test Equipment Fixture Torque Gauge 600g cm ATG Torque Gauge Adaptor Cassette Torque Meter SRK VH...

Page 50: ...velope CH 2 NTSC SW 30Hz PAL SW 25Hz Head Switching Output Point RF Envelope Output Point Test Conditions VCR VCP State Play an Alignment Tape Adjustment Point Guide Roller Height Adjustment Screws Fig C 4 2 Fig C 4 3 P3 POST ADJUSTMENT P2 POST ADJUSTMENT Turn the Roller Guide Height Adjustment Screw slightly to flatten the waveform Tracking control at center RF ENVELOPE OUTPUT TEST POINT OSCILLOS...

Page 51: ...Screw Fig C 5 3 A C Head Tape Tape 0 2 0 25mm P4 5 1 Preliminary Adjustment Height and Tilt Adjustment Perform the Preliminary Adjustment when there is no Audio Output Signal with the Alignment Tape 1 Initially adjust the Base Assembly A C Head as shown Fig C 5 1 by using the Height Adjustment Screw B 2 Play a Blank Tape and observe if the Tape passes accu rately over the A C Head without Tape Cur...

Page 52: ...ly adjust the Azimuth Adjustment Screw A and the Tilt Adjustment Screw C for Maximum Output of the 1Khz and 7Khz segments while maintaining the flattest Envelope differential between the two Frequencies Adjustment Procedure 5 3 Precise Adjustment Azimuth adjustment 6 X Value Adjustment Fig C 5 4 1KHZ Oscilloscope Alignment tape SP only Screw Driver Type 5mm CH 1 PB RF Envelope CH 2 NTSC SW 30Hz PA...

Page 53: ...hanism Condition Play the blank tape Play an alignment tape Adjustment Points Guide Roller Precise Adjustment Switching Point Tracking Preset X Value Checking Adjustment Procedure Play a blank tape and check for tape curling or creasing around the roller guide If there is a problem then follow the procedure 4 Guide Roller Height and 5 Audio Control A C Head Adjustment RF ENVELOPE OUTPUT TEST POINT...

Page 54: ... pinch roller If locations marked with o do not operate normally after cleaning check for wear and replace See the EXPLODED VIEWS at the end of this manual as well as the above illustrations See the Greasing Page 4 22 for the sections to be lubricated and greased NOTE o o o o Dirt on video head Dirt on tape transport system Low volume Sound distorted Tape does not run Tape is slack o In Review and...

Page 55: ...yl Alcohol Touch the cleaning patch to the head tip and gently turn the head rotating cylinder right and left Do not move the cleaning patch vertically Make sure that only the buckskin on the cleaning patch comes into contact with the head Otherwise the head may be dam aged Thoroughly dry the head Then run the test tape If lso propyl Alcohol remains on the video head the tape may be damaged when i...

Page 56: ...h Inside Top side 2 Base Tension Boss inside Hole 3 Arm Assembly F L U Groove 4 Arm Take up Rubbing Section 5 L D Motor Gear Wheel Part 6 Shaft 7 Arm Assembly F L of Buming Inside Hole 8 Reel S T Shaft G381 Yellow 9 Brake T Groove Guide Rail Base Loading Gear Drive Gear Sector Gear Cam Gear Part Bracket Side L Bracket Assembly Door 5 7 8 1 2 6 4 3 Slider Guide Slider Guide 1 Loading Path Inside To...

Page 57: ...MAINTENANCE INSPECTION PROCEDURE 4 22 GEAR F R GEAR AY P2 P3 Lever F R Base Tension Boss Cam ...

Page 58: ...d sensor Check syscon circuit NO YES YES YES NO NO NO 1 Deck Mechanism A NO NO NO No F R modes Is the present mode F R Mode Is the mode SW assembled correctly refer to Pages 4 14 Is the normal voltage supplied to the Capstan Motor Vcc1 Vcc2 Does terminal voltage Vctl of Capstan Motor supply side more than 4V Check Servo Power Circuits Replace the Capstan Motor Does the Capstan Motor rotate Do the ...

Page 59: ...age 4 14 Check spring Pinch Replace Drum Motor Check Servo Syscon Check the Syscon µ COM No cassette loading Insert the cassette Check Holder Assembly CST Is there variation for CST IN S W Output In Tape with REC Tab L H L In Tape without REC Tab L H L H Does the CST IN S W work normally Does the lever Assembly S W work normally Check Syscon Circuit Check Syscon Circuit Replace CST IN S W YES YES ...

Page 60: ...ensors ok Check Syscon Circuit Check Syscon Circuit Check Servo Syscon Does the Capstan Motor turn Is the terminal voltage of the Drum Motor more than 2 3V Replace the Drum Motor Is the Vcc voltage of the Drum Motor normal Check the clutch and the Idler Assembly YES YES YES YES YES YES YES YES NO NO NO NO NO Is the terminal voltage of Capstan Motor supplied more than 4V Replace the Capstan Motor I...

Page 61: ... C Board 5V YES Is there a short circuit between cassette switch and GND on main P C Board Remove the short circuit part or Replace the main P C Board NO Check Mode switch location and syscon circuit Replace CST IN Switch YES NO YES NO NO Replace CST IN Switch NO NO Cassette will not eject Does the L D motor rotate in reverse Check L D Motor or Drive IC Replace lever Assembly Switch Does the Lever...

Page 62: ...embly F L Check the power of L D Motor Is the Holder Assembly Cassette assembled correctly Replace the Gear Rack F L Does the Gear Assembly Rack F L work Does the Opener Door work Does the Arm Assembly F L work Does the L D Motor work Does the Holder Assembly Cassette move the Arm Assembly F L Replace the Front Loading Mechanism Assembly YES YES YES YES NO NO NO YES NO YES NO YES NO C ...

Page 63: ...4 28 EXPLODED VIEWS 117 103 105 117 100 106 107 A21 114 113 112 110 115 A24 116 102 A23 032 A22 109 054 054A 1 Front Loading Mechanism Section ...

Page 64: ...29 401 402 001 008 011 031 079 017 032 024 406 020 021 028 019 018 029 030 026 A03 A04 A01 002 002A 025 027 022 003 004 006 007 010 405 014 015 009 409 013 023 016 405 012 402 OPTIONAL PART 2 Moving Mechanism Section 1 ...

Page 65: ...EXPLODED VIEWS 4 30 051 052 517 061 056 058 518 052A 055 060 410 070 069 076 032 077 068 064 066 065 067 A11 078 A12 3 Moving Mechanism Section 2 ...

Page 66: ...O O O O O O BRAKE ASSEMBLY RS 020 LG4970R 0128A O O O O O O SPRING COIL D35 TB 021 LG4421R 0006A O O O O O O BRAKE ASSY T 022 LG6520D00002A O O O O O O HEAD CIRC D35 FE ST FE HEAD 023 LG3040R 0057A O O O O O O BASE LOADING 024 LG4261R 0024A O O ARM ASSEMBLY IDLER H 024 LG4261R 0029A O O O O ARM ASSEMBLY IDLER N 025 LG4810R 0118A O O O O O O BRACKET L D S NSP 026 LG4680R D002A O O O O O O MOTOR MEC...

Page 67: ...EMBLY SANYO DI EVENT ECY909NP A49 LG6871R 5501B O O O O O O PWB PCB ASSEMBLY TOTAL ECY SERIES RIGHT KEY 4TOOL 3P 250 LG3110R 0223G O O O O O O CASE TOP 0128 A288G SIDE SCREW 4EA 260 LG3210R 0023B O O O O O O FRAME MAIN VII PJT 60HR NSP 280 LG3720R F198B O O PANEL VIDEO FRONT CLK W O J B589G ECY201 NSP 280 LG3720R F198B O PANEL VIDEO FRONT CLK W O J B589G ECY201 NSP 280 LG3720R F198C O O PANEL VIDE...

Page 68: ...O O O O O CABLE COAXIAL 1200M M PAL PAL DOUBLE SHIELD 808 LG534 002C O O O O O O BATTERY MANGANESE AAM UM 3 SEOTONG 1 5 V LOL 1 810 LG6851RP0003A O O O O O O CABLE ASSY RF CABLE ASSY RF SCART RCA USING 900 LG6711R1P043A O REMOTE CONTROLLER ASSEMBLY N7 ECY909I NA4USS SANYO W VID 900 LG6711R1P043B O O REMOTE CONTROLLER ASSEMBLY N7 ECY208P NA3GSS SANYO W SHOW 900 LG6711R1P043C O O O REMOTE CONTROLLER...

Page 69: ...A SS50V M FM5 TP 5 C321 LG0CX6800K408 O O O O O O CAPACITOR TUBULA T C 68P 50V J SL TA26 C322 LG0CE1064F638 O O O O O O CAPACITOR ELECTROLYTIC 10M SRA 16V M FM5 TP 5 C323 LG0CE1064F638 O O O O O O CAPACITOR ELECTROLYTIC 10M SRA 16V M FM5 TP 5 C324 LG0CE4754K638 O O O O O O CAPACITOR FIXED ELECTROLYTIC 4 7UF SRA SS 50V 20 FM5 TP 5 C325 LG0CE1064F638 O O O O O O CAPACITOR ELECTROLYTIC 10M SRA 16V M ...

Page 70: ...54K638 O O O O O O CAPACITOR FIXED ELECTROLYTIC 4 7UF SRA SS 50V 20 FM5 TP 5 C535 LG0CE4754K638 O O O O O O CAPACITOR FIXED ELECTROLYTIC 4 7UF SRA SS 50V 20 FM5 TP 5 C543 LG0CN2220F668 O O O O O O CAPACITOR TUBULAR HIGH DIELEC 2200P 16V M X TA26 C544 LG0CQ4732K409 O O O O O O CAPACITOR FIXED FILM 0 047UF S 50V J PE TP C545 LG0CN3330K518 O O O O O O CAPACITOR FIXED TUBULAR High d 0 033UF 50V K B TA...

Page 71: ...ULAR High d 0 1UF D 50V 80 20 F Y5V TA C810 LG0CE1064F638 O O O CAPACITOR ELECTROLYTIC 10M SRA 16V M FM5 TP 5 C811 LG0CE1064F638 O O O CAPACITOR ELECTROLYTIC 10M SRA 16V M FM5 TP 5 C813 LG0CE1064F638 O O O CAPACITOR ELECTROLYTIC 10M SRA 16V M FM5 TP 5 C814 LG0CE1064F638 O O O CAPACITOR ELECTROLYTIC 10M SRA 16V M FM5 TP 5 C817 LG0CE1064F638 O O O CAPACITOR ELECTROLYTIC 10M SRA 16V M FM5 TP 5 C818 L...

Page 72: ...4B O O O O O O IC MICRO CONTROLLER HD6432197SA06F HITACHI 112 QFP IC503 LG0IAL241600B O O O O O O IC ATMEL AT24C16 IC504 LG0IKE703100A O O O O O O IC KEC KIA7031P 3P 3 1V RESET TAPING IC505 LG0IKE704200B O O O O O O IC KEC KIA7042P 3P 4 2V RESET TAPING IC506 LG0ILNRPY001A O O O IC LINEAR PT6955 PTC 24P SOP TP LED DRIV IC506 LG0ILNRPY001A O O O IC LINEAR PT6955 PTC 24P SOP TP LED DRIV IC751 LG0IIT3...

Page 73: ...KTC3205 TP Y KTC2236A KEC Q157 LG0TR120309AE O O O O O O TRANSISTOR SRC1203 TP AUK TO92 22K 22K Q159 LG0TR127309AA O O TRANSISTOR KTA1273 TP Y KTA966A KEC Q161 LG0TR534309BA O O TRANSISTOR 2SC5343 L TP AUK TO92 Q162 LG0TR534309BA O O O O O O TRANSISTOR 2SC5343 L TP AUK TO92 Q163 LG0TR120109AC O O O O O O TRANSISTOR SRC1201 TP AUK TO92 4 7K 4 7K Q164 LG0TR120309AE O O O O O O TRANSISTOR SRC1203 TP ...

Page 74: ...ED CARBON FILM 3 9K OHM 1 6 W 5 00 TA26 R319 LG0RD5600F608 O O O O O O RESISTOR FIXED CARBON FILM 560 OHM 1 6 W 5 00 TA26 R320 LG0RD1500F608 O O O O O O RESISTOR FIXED CARBON FILM 150 OHM 1 6 W 5 00 TA26 R321 LG0RD1201F608 O O O O O O RESISTOR FIXED CARBON FILM 1 2K OHM 1 6 W 5 00 TA26 R322 LG0RD1001F608 O O O O O O RESISTOR FIXED CARBON FILM 1K OHM 1 6 W 5 00 TA26 R323 LG0RD5601F608 O O O O O O R...

Page 75: ...O O O O RESISTOR FIXED CARBON FILM 560 OHM 1 6 W 5 00 TA26 R563 LG0RD5601F608 O O O O O O RESISTOR FIXED CARBON FILM 5 6K OHM 1 6 W 5 00 TA26 R564 LG0RD2702F608 O O O O O O RESISTOR FIXED CARBON FILM 27K OHM 1 6 W 5 00 TA26 R566 LG0RD4701F608 O O O O O O RESISTOR FIXED CARBON FILM 4 7K OHM 1 6 W 5 00 TA26 R567 LG0RD1002F608 O O O O O O RESISTOR FIXED CARBON FILM 10K OHM 1 6 W 5 00 TA26 R568 LG0RD6...

Page 76: ...FIXED CARBON FILM 4 7K OHM 1 6 W 5 00 TA26 R831 LG0RD4701F608 O O O RESISTOR FIXED CARBON FILM 4 7K OHM 1 6 W 5 00 TA26 R8R1 LG0RD5600F608 O O O RESISTOR FIXED CARBON FILM 560 OHM 1 6 W 5 00 TA26 R8R2 LG0RD5600F608 O O O RESISTOR FIXED CARBON FILM 560 OHM 1 6 W 5 00 TA26 R901 LG0RD0752F608 O O O O O O RESISTOR FIXED CARBON FILM 75 OHM 1 6 W 5 00 TA26 R901 LG0RD1501F608 O O O O O O RESISTOR FIXED C...

Page 77: ...LG6700PFPL03C O O O TUNER I TADC U301D LG PAL FS Y2K2 TU701 LG6700PFPL03E O TUNER G K I TADC M301D LG PAL FS Y2 X301 LG6202R2443AC O O O O O O RESONATOR CRYSTAL HC49U BUBANG 4 433709MHZ 15 X501 LG6212AA2100C O O O O O O RESONATOR CRYSTAL HC 49S BUBANG 10MHZ 30 PPM X502 LG6202R DA01A O O O O O O RESONATOR CRYSTAL CFS 308 CITIZEN 32 768KHZ X751 LG529 021Q O O O RESONATOR CRYSTAL 49U BUBANG 18432000H...

Page 78: ...R 0008A O O O O O O BRAKE ASSEMBLY RS 020 LG4970R 0128A O O O O O O SPRING COIL D35 TB 021 LG4421R 0006A O O O O O O BRAKE ASSY T 022 LG6520D00002A O O O O O O HEAD CIRC D35 FE ST FE HEAD 023 LG3040R 0057A O O O O O O BASE LOADING 024 LG4261R 0024A O ARM ASSEMBLY IDLER H 024 LG4261R 0029A O O O O O ARM ASSEMBLY IDLER N 025 LG4810R 0118A O O O O O O BRACKET L D S NSP 026 LG4680R D002A O O O O O O M...

Page 79: ... FRONT CLK W O J B589G ECY201 NSP 280 LG3720R F198D O O PANEL VIDEO FRONT CLK MONOJ B589G ECY201 NSP 280 LG3720R F198F O O PANEL VIDEO FRONT CLK HIFI B589G ECY909N NSP 280 LG3720R F198G O PANEL VIDEO FRONT CLK W O J B589G VCR E NSP 283 LG3580R V019C O DOOR CASE CST VHR H792E NICAM ECY901NI 283 LG3580R V020B O DOOR CASE CST VHR M292E M291IR ECY201I 283 LG3580R V020E O O DOOR CASE CST VHR M272SP ECY...

Page 80: ...A B C D E F DESCRIPTION SPECIFICATION REMARKS 900 LG6711R1P043A O REMOTE CONTROLLER ASSEMBLY N7 ECY909I NA4USS SANYO W VID 900 LG6711R1P043C O O O O O REMOTE CONTROLLER ASSEMBLY N7 ECY200P NA3GSS SANYO W O SH Remote Control Section ...

Page 81: ...J SL TA26 C322 LG0CE1064F638 O O O O O O CAPACITOR ELECTROLYTIC 10M SRA 16V M FM5 TP 5 C323 LG0CE1064F638 O O O O O O CAPACITOR ELECTROLYTIC 10M SRA 16V M FM5 TP 5 C324 LG0CE4754K638 O O O O O O CAPACITOR FIXED ELECTROLYTIC 4 7UF SRA SS 50V 20 FM5 TP 5 C325 LG0CE1064F638 O O O O O O CAPACITOR ELECTROLYTIC 10M SRA 16V M FM5 TP 5 C326 LG0CN1030F678 O O O O O O CAPACITOR TUBULA HIGH DIELE 0 01M 16V M...

Page 82: ...EC 2200P 16V M X TA26 C544 LG0CQ4732K409 O O O O O O CAPACITOR FIXED FILM 0 047UF S 50V J PE TP C545 LG0CN3330K518 O O O O O O CAPACITOR FIXED TUBULAR High d 0 033UF 50V K B TA26 C546 LG0CE4764J638 O O O O O O CAPACITOR AL ELECTROLYTIC 47UF SRA SS 35V M FM5 TP 5 C547 LG0CN1030F678 O O O O O O CAPACITOR TUBULA HIGH DIELE 0 01M 16V M Y TA26 C551 LG0CQ3332K409 O O O O O O CAPACITOR FIXED FILM 0 033UF...

Page 83: ...16V M FM5 TP 5 C818 LG0CE4754K638 O O O CAPACITOR FIXED ELECTROLYTIC 4 7UF SRA SS 50V 20 FM5 TP 5 C819 LG0CE1064F638 O O O CAPACITOR ELECTROLYTIC 10M SRA 16V M FM5 TP 5 C820 LG0CQ6822K409 O O O CAPACITOR POLYESTER MYLAR 6800PF S 50V J PE TP C821 LG0CE4764F638 O O O CAPACITOR ELECTROLYTIC 47M SRA SS 16V M FM5 TP 5 C822 LG0CE1064F638 O O O CAPACITOR ELECTROLYTIC 10M SRA 16V M FM5 TP 5 C823 LG0CE1064...

Page 84: ...MK LD501 LG4931R 0017C O O O O O O HOLDER ASSY LED DI CKD LOCAL ES501 LG4931R 0050C O O O O O O HOLDER ASSEMBLY END DI ES502 LG4931R 0050C O O O O O O HOLDER ASSEMBLY END DI FH01 LG586 008B O O O O O O HOLDER FUSE CLIP TP SINSUNG FH02 LG586 008B O O O O O O HOLDER FUSE CLIP TP SINSUNG IC101 LG0IPMGSK003A O O O O O O IC POWER MANAGEMENT STR A6351 SANKEN 8 DIP ST SMPS IC103 LG0IKE431000A O O O O O O...

Page 85: ...6630R BE01L O O O O O O CONNECTOR CIRC BOARD TO BOAR JE612 12 JAE EUN 12P 2 0MM PMK02 LG561 843D O O O O O O CONNECTOR TUC P05P B1 TAIKO B B 5PIN PMK04 LG6631R E007K O O O O O O CONNECTOR ASSEMBLY 8283 9073 3 PIN 150M M UL1061 PW101 LG561 292B O O O O O O CONNECTOR GP390 LGC 3P 3 96 STRAIGHT SN Q151 LG0TR127309AA O O O O O O TRANSISTOR KTA1273 TP Y KTA966A KEC Q152 LG0TR127309AA O O O O O O TRANSI...

Page 86: ...BON FILM 2 2 OHM 1 6 W 5 00 TA26 R314 LG0RD1001F608 O O O O O O RESISTOR FIXED CARBON FILM 1K OHM 1 6 W 5 00 TA26 R315 LG0RD0472F608 O O O O O O RESISTOR FIXED CARBON FILM 47 OHM 1 6 W 5 00 TA26 R316 LG0RD1000F608 O O O O O O RESISTOR FIXED CARBON FILM 100 OHM 1 6 W 5 00 TA26 R317 LG0RD5601F608 O O O O O O RESISTOR FIXED CARBON FILM 5 6K OHM 1 6 W 5 00 TA26 R318 LG0RD3901F608 O O O O O O RESISTOR ...

Page 87: ...O O O O RESISTOR FIXED CARBON FILM 4 7K OHM 1 6 W 5 00 TA26 R560 LG0RD4701F608 O O O O O O RESISTOR FIXED CARBON FILM 4 7K OHM 1 6 W 5 00 TA26 R561 LG0RD5600F608 O O O O O O RESISTOR FIXED CARBON FILM 560 OHM 1 6 W 5 00 TA26 R562 LG0RD5600F608 O O O O O O RESISTOR FIXED CARBON FILM 560 OHM 1 6 W 5 00 TA26 R563 LG0RD5601F608 O O O O O O RESISTOR FIXED CARBON FILM 5 6K OHM 1 6 W 5 00 TA26 R564 LG0RD...

Page 88: ...8 O O O RESISTOR FIXED CARBON FILM 1K OHM 1 6 W 5 00 TA26 R830 LG0RD4701F608 O O O RESISTOR FIXED CARBON FILM 4 7K OHM 1 6 W 5 00 TA26 R831 LG0RD4701F608 O O O RESISTOR FIXED CARBON FILM 4 7K OHM 1 6 W 5 00 TA26 R8R1 LG0RD5600F608 O O O RESISTOR FIXED CARBON FILM 560 OHM 1 6 W 5 00 TA26 R8R2 LG0RD5600F608 O O O RESISTOR FIXED CARBON FILM 560 OHM 1 6 W 5 00 TA26 R901 LG0RD0752F608 O O O O O O RESIS...

Page 89: ...49 LG556 219B O O O O O O SWITCH TACT THVV502GAA POSTECH DC 12 V 5 T101 LG642 015G O O O O O O TRANSFORMER SMPS SJE 015G SHT 015G SJ SH CS LSE TU701 LG6700PFPL03B O O TUNER B G TADC G301D LG PAL FS Y2K2 TU701 LG6700PFPL03E O O O O TUNER G K I TADC M301D LG PAL FS Y2 X301 LG6202R2443AC O O O O O O RESONATOR CRYSTAL HC49U BUBANG 4 433709MHZ 15 X501 LG6212AA2100C O O O O O O RESONATOR CRYSTAL HC 49S ...

Page 90: ...MEMO ...

Page 91: ...SANYO Electric Co Ltd Osaka Japan Jun 02 K Printed in Japan ...

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