JVC HR-DVS2EK, Service Manual

Page 1: ...tput VHS DECK VIDEO AUDIO Signal system PAL type colour signal and CCIR monochrome signal 625 lines 50 fields Recording system DA4 Double Azimuth head helical scan system Format S VHS VHS PAL standard Signal to noise ratio 45 dB Horizontal resolution SP LP 250 lines VHS 400 lines S VHS EP 220 lines VHS 350 lines S VHS Frequency range 70 Hz to 10 000 Hz Normal audio 20 Hz to 20 000 Hz Hi Fi audio M...

Page 2: ...40 2 18 3 Linearity adjustment 2 41 2 18 4 PB switching point adjustment 2 41 2 18 5 Error rate adjustment 2 41 2 18 6 Error rate measuring method 2 41 2 19 TAPE EJECTION 2 42 TABLE OF CONTENTS Section Title Page Section Title Page 3 ELECTRICAL ADJUSTMENT VHS 3 1 PRECAUTION 3 1 3 1 1 Required test equipments 3 1 3 1 2 Required adjustment tools 3 1 3 1 3 Color colour bar signal Color colour bar pat...

Page 3: ...e specified for compli ance with recognized codes pertaining to X ray emission Consequently when servicing these products replace the cath ode ray tubes and other parts with only the specified parts Under no circumstances attempt to modify these circuits Unauthorized modification can increase the high voltage value and cause X ray emission from the cathode ray tube 12 Crimp type wire connector In ...

Page 4: ... between terminals and surrounding metallic parts See table 1 below 4 Leakage current test Confirm specified or lower leakage current between earth ground power cord plug prongs and externally exposed accessible parts RF terminals antenna terminals video and audio input and output terminals microphone jacks earphone jacks etc Measuring Method Power ON Insert load Z between earth ground power cord ...

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Page 6: ...tment information for installation Fig 1 1 1 1 2 3 4 5 Step Loc No Fig No Point Note Part name Top cover Bracket COM1 4 S1 3 S2 2 L1 L2 2 S3 1 Front panel assembly COM2 8 L3 CN7507 WR1 CN3011 WR2 Note 1 2 3 4 2 1 3 DISCONNECTION OF CONNECTORS WIRES CONNECTOR FPC CONNECTOR FPC Fig 1 3 1 Fig 1 3 2 Fig 1 3 3 Fig 1 3 4 CONNECTOR FPC Fig 1 3 5 CONNECTOR FPC CONNECTOR FPC 1 4 SCREWS USED CABINET COMPONE...

Page 7: ...mbly method COM section Note 5 When removing the SW REG board assembly or Regula tor board assembly unhook the several spacers connect ing it with pliers from the top side Note 6 Perform the work by leaving fan motor attached to the rear cover except when replacing the fan motor When attaching the rear cover please be careful with the wiring Fig COM1 Top cover 7 S2 5 S2 4 S1 3 S1 6 S2 2 S1 1 S1 1 ...

Page 8: ...17 S4 12 S4 11 S4 10 S4 23 23 S4 S4 23 S4 21 S4 Display board assembly LED SW board assembly Jog board assembly Jack board assembly Eject SW board assembly Knob Jog Knob Shuttle 3 2 5 CN5325 CN5324 WR8 WR5 Foil side Note 1 WR4 Foil side Note 1 WR6 WR7 CN5321 CN5322 L6 Spacer Note 5 L6 Spacer Note 5 CN5323 4 27 S5 WR3 Supporting tape side Note 1 L4 Spacer Note 5 L5 CN5301 26 S5 ...

Page 9: ... the Main board assembly take care not to damage the sensors on the Main board assembly D3001 LED Q3002 Start sen sor Q3003 End sensor S3002 S cassette switch Fig 1 Fig 2 Fig 3 Procedures for Lowering the Cassette holder assembly As the mechanism of this unit is integrated with the Housing assembly the holder must be lowered and the two screws un screwed when removing the Mechanism assembly Proced...

Page 10: ...e Note 2 WR12 Foil side Note 2 WR14 Foil side Note 2 CN5321 14 S3 16 S5 15 S3 9 S6 8 S6 11 S6 10 S6 12 S6 13 S6 WR16 Foil side Note 2 CN5322 CN703 WR15 CN2601 CN3014 WR13 Foil side Note 2 WR12 Foil side Note 2 WR14 Foil side Note 2 CN5321 Fig V4 17 S3 5 Note When installing the Mechanism assembly secure the screws S8 in the order of a b ...

Page 11: ...y etc together before removing the major parts Note 2 Take care not to scratch or damage the drum assembly by the cleaner assembly when performing work Note 3 Take care not to damage the board assembly when de taching parts Note 4 When attaching the FPC be sure to connect it in the cor rect orientation Fig D1 Fig D2 1 Note 1 WR18 WR19 CN1501 WR17 WR7 CN5501 CN5506 4 S5 3 S5 2 S5 1 S5 Base 2 CN5502...

Page 12: ...R22 WR21 WR25 WR23 WR24 CN5503 CN5504 CN5001 CN5502 CN5505 Earth plate 8 S11 13 S4 L3 4 12 S4 11 S4 14 S13 16 S13 15 S13 5 Note 2 6 20 S5 WR15 CN3501 CN3701 CN1001 CN1002 WR14 Note 3 Supporting tape side Note 3 Foil side Note 4 WR16 WR8 17 S5 19 S5 18 S5 ...

Page 13: ...CN2601 A 1 2 6 7 3 4 5 B E Front panel assembly PATCH CORD PTU94017B CN7507 Main board assembly CN3011 CN3014 CN703 CN2601 CN7508 CN7509 CN5322 CN5321 CN3701 CN3501 C D CN1002 Fig 1 8 1 Service position VHS side Table 1 8 1 Installation 1 Stand up the bottom chassis assembly so that the DV Regulator side is in the lower position 2 Connect the PATCH CORD to the three FPCs then con nect CN3014 CN750...

Page 14: ...U94022 13 QUQ212 1340CG D PTU94022 15 QUQ212 1540CG E YTU94072 06 QUQ210 0640CG F YTU94074 15 QUQ105 1540AA G YTU94074 26 QUQ105 2640AA H YTU94074 20 QUQ105 2040AA Table 1 8 3 Installation For the PATCH CORDS see Table 1 8 3 The patch cords that are indicated in Table 1 8 3 are in one package 1 Connect a PATCH CORD to the FPC and connect the end to the connector CN1002 2 Connect PATCH CORDS to the...

Page 15: ...for Lowering the Cassette holder assembly on page 1 5 of 1 6 HOW TO REMOVE THE MAJOR PARTS VHS section 6 The cassette holder lowers and when the loading has completed the mechanism enters the desired mode Main board assembly Terminal board assembly S Sub board assembly 3D Digital 2M board assembly Demodulator board assembly VR401 D A LEVEL ADJ Fan Swithing regulator board assembly Regulator board ...

Page 16: ...ide Foil side Foil side A C HEAD DRUM Treat the wire according to the figure not to overlap in TP Make a crease Supporting tape side B Should be confirmed that wire not touch to IC of the Stator board assembly After attach the Mechanism assembly treat the wire according to the figure The 21 22 wires should be treat under the P R MDA board assembly CN1502 CN3501 CN1101 CN3701 CN1001 CN5505 CN5503 C...

Page 17: ...AIN CN1 UPPER DRUM 13 FPC 11 WR11 A C HEAD CN1 MAIN CN2001 7 FPC 12 WR12 MAIN CN3014 DV MAIN CN1002 6 FPC 13 WR13 MAIN CN703 DV MAIN CN3501 6 WIRE 14 WR14 MAIN CN2601 DV MAIN CN3701 8 FPC 15 WR15 DV MAIN CN1502 SENSOR 15 FPC 16 WR16 PRE REC MDA CN5002 DV MAIN CN2001 26 FPC 17 WR17 PRE REC MDA CN5506 DV MAIN CN1501 20 FPC 18 WR18 PRE REC MDA CN5507 DV HOUSING MOTOR 4 WIRE 19 WR19 PRE REC MDA CN5502...

Page 18: ...ion at the moment of emergency 4 Mechanism mode position at the moment of emer gency Note For the emergency detail information 1 see 1 11 4 Emergency detail information 1 3 Transmit the code 59 from the Jig RCU once again The FDP shows the emergency detail information 2 in the form of 5 6 7 5 Type of the cassette tape in use 1 6 Winding position of the cassette tape in use 7 Type of the cassette t...

Page 19: ...en the housing load increases during ejection the loading motor is stopped because of lack of headroom in its drive torque Housing load increasing factors Temperature environment low tempera ture etc mechanism wear or failure 3 The sensor switch for detecting the end of ejection are not functioning normally 4 The loading motor drive voltage is lower than specified or power is not sup plied to the ...

Page 20: ... compression OFF as a result of POWER OFF 16 Mode transition to STOP with pinch roller compression ON as a result of POWER ON 18 Mode transition to PLAY 1A Mode transition to FWD SEARCH 1C Mode transition to REC 1E Mode transition to FWD STILL SLOW 20 Mode transition to REV STILL SLOW 22 Mode transition to REV SEARCH 24 Mode transition from FF REW to STOP 26 Mode transition to FF 28 Mode transitio...

Page 21: ... tape T 5 08 0E C cassette thick tape TC 10 09 15 C cassette thick tape TC 20P 0A 0B Small reel thick tape T 20 0A 16 C cassette thin tape TC 30 0A 16 C cassette thin tape TC 40 0D 0F Small reel thick tape T 40 11 14 Small reel thick tape T 60 15 18 Small reel thick tape T 80 DF 160 17 1A Small reel thick tape T 80 DF 180 19 1D Small reel thick tape T 100 1D 21 Small reel thick tape T 120 DF 240 1...

Page 22: ...l failures If you cannot remove the cassette tape which is loaded be cause of any electrical failure manually remove it by taking the following steps 1 Unplug the power cable and remove the top cover bracket and front panel assembly See 1 3 DISASSEM BLY ASSEMBLY METHOD 2 Unload the cassette by manually turning the loading mo tor of the mechanism assembly toward the front In do ing so hold the tape...

Page 23: ...Fig 2 1 3d 4 In the same way as in the electrical failure instructions in 2 1 3 1 4 remove the top guide 5 Raise the cassette tape cover By keeping it in that posi tion draw out the cassette tape case from the cassette holder and take out the tape 6 By hanging the pinch roller arm assembly spring back on the hook take up the slack of the tape into the cas sette Fig 2 1 3d Fig 2 1 3c Pole base asse...

Page 24: ... guard Press lever assembly Lid guide Guide arm assembly Reel disk take up side Sub brake assembly take up side Main brake assembly take up side Idler arm assembly Idler lever Main brake assembly supply side Reel disk supply side Rec safety lever Tension brake assembly Adjust pin Tension arm assembly Pole base assembly supply side Full erase head Pole base assembly take up side T1 T26 T25 T24 T23 ...

Page 25: ...y as this will cause damage to the video head 2 To clean the parts of the tape transport system other than the upper drum use a piece of closely woven cloth or a cotton swab soaked with alcohol 3 After cleaning make sure that the cleaned parts are com pletely dry before using the video tape 3 Lubrication With no need for periodical lubrication you have only to lu bricate new parts after replacemen...

Page 26: ...otary encoder B 1 2 2 11 Clutch unit B 1 2 2 12 Change lever assembly B 3 2 2 12 Direct gear B 4 2 2 12 Clutch gear B 5 2 2 12 Coupling gear 2 B 6 2 2 13 Link lever B 1 2 2 14 Cassette gear B 2 2 2 14 Control cam B 2 2 2 14 Worm gear B 1 Lid guide T B 5 2 2 15Control bracket1 B 1 2 2 15Control plate B 6 2 2 16Loading arm gear supply side B 7 2 2 16Loadingarmgear take upside B 8 2 2 16Loading arm g...

Page 27: ...ration in response to phases of the rotary encoder internal switch positions the mechanism may not operate properly unless such parts as the rotary encoder control plate loading arm gear control cam cassette gear limit gear relay gear and drive gear are installed in their correct posi tions Especially this model is not provided with any cassette hous ing assembly so that cassette loading and unloa...

Page 28: ...y into the groove See Fig 2 2 3g 4 While swinging the lock lever R of the cassette holder assembly toward the front put the legs A and B into the rail See Fig 2 2 3g 5 Drop the three legs on the left side of the cassette holder assembly into the groove at one time See Fig 2 2 3h 6 Slide the whole cassette holder assembly toward the front to bring it to the eject end position 7 Install the limit ge...

Page 29: ...the audio control head remove the three screws B while controlling the compression spring Fig 2 2 6a Fig 2 2 6c Fig 2 2 4a 2 2 5 Guide Arm Assembly and Press Lever Assembly 1 How to remove 1 Remove the spring and expand the lug of the lid guide in the arrow indicated direction Then remove the guide arm assembly by pulling it up 2 Remove the press lever assembly by pulling it up See Fig 2 2 5a Tens...

Page 30: ...mbly are correctly in stalled as indicated in Fig 2 2 8b 3 Making sure that the connector for the capstan motor is correctly mounted and securely tighten the three screws A Note When the capstan motor has been replaced with a new one perform recording in the EP or LP mode for at least 2 minutes at normal temperatures immediately be fore starting the FF REW or SEARCH operations Ag ing Spacer Spacer...

Page 31: ...the rotary encoder guide in the arrow indicated direction and remove the change lever assembly 2 Remove the slit washer retaining the direct gear and re move the latter Take care so as not to lose the washer and spring See Fig 2 2 12a 2 2 10 Rotary Encoder 1 How to remove 1 Remove the screw A and remove the rotary encoder by pulling it up See Fig 2 2 10a Fig 2 2 10a Rotary encoder Front side Screw...

Page 32: ...t of the rotary encoder guide Mark E Fig 2 2 13c Worm gear Control cam Main deck guide hole Control cam guide hole Cassette gear 2 2 14 Cassette Gear Control Cam and Worm Gear 1 How to remove 1 Remove the control cam by lifting it 2 Open the two lugs of the cassette gear outward and pull the latter off 3 Remove the belt wound around the worm gear and the loading motor 4 Open the lug of the lid gui...

Page 33: ...embly shaft Section D Section D Section A Hole A 3 Install the control plate so that the section A of the load ing arm gear shaft fits into the hole A of the control plate the section B of the control plate guide into the hole B and the control plate comes under the section C of the rotary encoder guide and the section D of the loading arm gear shaft while press fit the pole base assmebly sup ply ...

Page 34: ... main deck 3 Remove the lugs B and C of the sub brake assembly take up side from the main deck and remove the sub brake assembly take up side Fig 2 2 19a Spring Sub brake assembly take up side Lug B Lug A Lug C Fig 2 2 20a Lug D Lug C Spring Lug E Lug A Lug B Main brake assembly take up side Reel disk take up side Main brake assembly supply side Notch 2 2 20 Main Brake Assembly take up side Reel D...

Page 35: ... 24a 4 Place the upper drum assembly hole a over the rotor assembly holes b with three holes to be aligned and tighten the two screws B See Fig 2 2 24a Lug Idler lever Hook Idler arm assembly Slit washer Fig 2 2 23a Stator assembly Flat cable Take care not to mix up the polar faces when installing Screws A Fig 2 2 24a 2 2 21 Tension Brake Assembly Reel Disk supply side and Tension Arm Assembly 1 H...

Page 36: ...4 Position the collar assembly as indicated in Fig 2 2 25c while controlling its up down movement 5 Secure the collar assembly in position with a hexagonal wrench while pressing its top with the fingers 6 After installation gently turn the upper drum assembly with your hand to make sure that it turns normally Then install the brush and the spring 7 Install the rotor assembly and stator assembly ac...

Page 37: ...duce the V PB FM waveform while pressing the chan nel buttons during playback If a drop in level is found on the left side turn the guide roller of the pole base assembly supply side with the roller driver to make the V PB FM waveform linear If a drop in level is on the right side likewise turn the guide roller of the pole base assembly take up side with the roller driver to make it linear See Fig...

Page 38: ...F A C head base Mechanism assembly Specified value G Maximum V PB FM waveform Adjustment tool H A C head positioning tool PTU94010 1 Play back the alignment tape A1 2 Apply the external trigger signal to D FF E to observe the V PB FM waveform at the measuring point D 3 Press the channel buttons simultaneously to enter the manual tracking mode This also brings tracking to the center centre 4 Loosen...

Page 39: ...from the Jig RCU When the VCR enters the stop mode the adjustment is completed 5 If the VCR enters the eject mode perform adjustment for the audio control head phase X value again Signal A Alignment tape LP stairstep PAL MHPE L Mode B PB Auto adjust Equipment C Oscilloscope Measuring point D TP106 PB FM External trigger E TP111 D FF Adjustment part F Jig RCU Code 50 Specified value G STOP mode Max...

Page 40: ...304 2 320 4 335 IN FF REW OUT PLAY Direct gear Change lever 2 ON HALF REV HALF FF REW OFF Tension arm ON CONTACT OFF Main brake S ON CONTACT OFF Main brake T ON OFF Sub brake S ON OFF Sub brake T ON OFF OFF ON Capstan brake ON OFF Rec safety switch Operation mode ON PLAY ON REV CONTACT OFF C INS Pinch roller SUPPLY CENTER TAKE UP Idler position READY RESET Take up lever ON OFF Guide arm Timer REC ...

Page 41: ...2 20 ...

Page 42: ...L1 L5 1 2 1 Drum assembly T 2 3 S2 2 3 3 2 Motor bracket assembly T 2 4 S2 2 4 4 3 Middle catcher assembly T 3 3 S2 1 2 3 4 5 6 7 5 Parts to be removed in disassembly assembly such as screws washers and springs and the points Symbol Name Point S Screw W Washer P Spring Connector lock L soldering SD shield etc Example W1 Remove the washer W1 P1 Remove the spring P1 6 Notes for disassembly assembly ...

Page 43: ... Figs 2 10 1 to 6 for details Note This mechanism assembly has another ASSEMBLY mode However this mode cannot be identified from the markings because it corresponds to an intermediate po sition between the C IN C mode and S FF H mode This mode can be confirmed by the rotary encoder phase See Fig 2 10 7 1 Checking the mechanism mode R ENC 20 ROTARY ENCORDER 2 1 3 MAIN CAM GEAR 0 C IN ASSEMBLY S FF ...

Page 44: ...SSEMBLY mode Motor Bracket Assembly Loading Motor Wire Brown Wire Red DC 3 V Rotary Encoder Marking Colored red H C ASSEMBLY Note In this ASSEMBLY mode only the 2 gear teeth of the rotary encoder are marked red coloring Fig 2 10 7 ...

Page 45: ... MAIN CAM 0 0 SUB CAM ON OFF S REV PLAY FF REW ON 1 ON 2 OFF ON 1 ON 2 OFF ON OFF ON REV MODE PRESS UP ON PLAY MODE OFF OFF ASSY HALF LOADING ON OFF OFF 2 OFF 1 ON OFF 2 OFF 1 ON SUP CENTRRING S REV C IN ASSEMBLY S FF LOADING END PLAY REV STOP FF REW 0 15 33 33 40 40 15 166 66 140 140 193 33 160 160 226 66 185 185 273 33 220 220 306 66 245 245 36 17 169 66 87 190 33 196 33 223 66 229 66 270 33 276...

Page 46: ...T 2 13 8 S2 2 L13 10 Position alignment 21 20 Base plate assembly T 2 13 8 S2 2 L14 22 21 Ent guide base assembly T 2 13 9 S2 23 22 Worm wheel 2 T 2 13 9 11 Phase alignment 24 23 Timing belt T 2 13 9 25 24 Center gear assembly T 2 13 9 26 25 Reel drive pulley assembly T 2 13 10 W1 27 26 Push plate T 2 13 10 W1 28 27 Clutch lock gear 2 T 2 13 10 W3 29 28 Clutch lock gear 1 T 2 13 10 P6 30 29 Tensio...

Page 47: ...2 26 Fig 2 12 1 2 19 42 1 18 41 3 17 12 16 36 20 4 32 26 10 33 24 13 28 21 11 22 8 34 35 14 37 7 29 30 23 9 25 5 15 38 39 31 6 40 TOP VIEW ...

Page 48: ...l not to damage the drum assembly when removing it Note 4 The bracket DV may come in the way of re moval of screw 7 Be sure to remove the bracket before proceeding to the screw removal 2 13 DISASSEMBLY ASSEMBLY 1 A Cassette Housing Assembly B Mechanism Assembly Fig 2 13 1 1 S1 A 2 S1 L2 L4 L5 L1 L3 B Note1 Fig 2 13 2 5 S2 1 2 3 S2 4 S2 7 S2 6 S2 9 S2 8 S2 Note2 Note2 Note4 Note3 2 1 Drum assembly ...

Page 49: ...ook a first then with hook b After attaching it set it to the positioning shown in Step 3 and confirm that band arm plate sub assembly 7 can be rotated in the direction of the arrow as shown below 3 3 Middle Catcher Assembly 4 Reel Cover Assembly Fig 2 13 3 Fig 2 13 4 3 13 S2 L6 L6 4 12 S2 10 S2 11 S2 Note5 4 5 Pinch Roller Arm Assembly 6 Sub Brake Assembly 7 Band Arm Plate Sub Assembly 8 Tension ...

Page 50: ...ig 2 13 5 Fig 2 13 6 Note 9 When attaching the sub deck assembly make sure to adjust the phase of the control plate 6 11 Sub Deck Assembly 12 Main Brake Sup Assembly 13 Main Brake Take up Assembly W1 10 9 13 12 11 18 S2 15 S2 16 S2 17 S2 L10 L11 P4 P5 Note9 ...

Page 51: ...rkings face oppo site to each other 8 18 Guide rail Take up assembly 19 Guide rail Sup assembly 20 Base plate assembly 14 L12 L12 17 15 16 11 19 S2 25 S2 20 19 20 S2 21 S2 24 S2 22 S2 18 23 S2 L13 L14 Note10 Fig 2 13 8A 19 18 7 14 Reel disk assembly Sup 15 Reel disk assembly Take up 16 Prism 17 Control plate ...

Page 52: ...attach the worm wheel 2 22 10 25 Reel drive pulley assembly 26 Push plate 27 Clutch lock gear 2 28 Clutch lock gear 1 Fig 2 13 9A Align the phase of the rotary encoder assembly 34 then attach it by aligning the phase hole of the mecha nism assembly 26 S2 21 22 24 23 Note11 27 W1 W3 P6 28 26 W1 25 34 22 Phase alignment Mark Red ...

Page 53: ...nect gear 2 33 Connect gear 2 Fig 2 13 11A Align the phase of the main cam 35 then attach it by fitting the bosses into the cam slot Note 13 How to attach the charge arm assembly 31 Fig 2 13 11B Align the phase of the sub cam 38 then attach it by fitting the boss into the cam slot L17 29 30 31 L16 L15 W1 Note12 Note13 34 30 29 35 Boss Phase alignment 38 31 39 Boss Phase alignment Phase alignment 2...

Page 54: ...embly can be removed by displacing it in the direction of the arrow 30 S2 34 L18 37 36 35 W1 29 S2 Note14 Note15 Note16 Note15 Note15 COLLAR 34 35 Phase alignment Mark colored red 35 37 36 Phase alignment Phase alignment Phase alignment Boss Boss Align the phase of the main cam 35 then attach it by placing the red coloured markings on 2 gear teeth within the encircled area Phase alignment L18 37 A...

Page 55: ...ctly The clutch lock lever assembly can be removed by displacing it in the direction of the arrow Align the phases of the arm gear 2 assembly 39 and clutch lock lever assembly 40 then attach them by fitting the boss into the lower cam slot and tighten the screws 15 41 Capstan motor 42 Drum base deck Fig 2 13 15 31 S2 40 38 L19 39 Note17 Note17 Note17 Note18 32 S2 33 S2 34 S2 42 41 P7 ADJUST NUT 39...

Page 56: ...9 34 23 24 20 36 40 27 26 B 28 39 5 31 25 33 9 21 13 11 14 15 16 6 2 38 42 3 19 41 37 32 1 18 10 4 W2 P3 14 S3 15 S2 23 S2 22 S2 10 S2 11 S2 3 S2 4 S2 24 S2 5 S2 12 S2 34 S2 27 S2 28 S2 P7 ADJ NUT 32 S2 33 S2 26 S2 30 S2 25 S2 29 S2 W1 W1 W1 W1 W1 COLOR W3 P6 W1 31 S2 20 S2 18 S2 21 S2 17 S2 7 S2 9 S2 8 S2 6 S2 19 S2 13 S2 W1 16 S2 Fig 2 14 1 ...

Page 57: ...t assembly 3 Middle catcher assembly 17 Control plate 18 Guide rail Take up assembly 19 Guide rail Sup assembly 6 Sub brake assembly 24 Center gear assembly 27 Clutch lock gear 2 29 Tension control arm assembly 30 Brake control arm assembly 35 Main cam 36 Arm gear 1 assembly 26 Push plate 25 Reel drive pulley assembly 37 Centering arm assembly 28 Clutch lock gear 1 38 Sub cam 5 S2 3 S2 4 S2 7 S2 6...

Page 58: ...rm sub assembly 9 EXIT guide arm assembly 10 Swing arm assembly 21 Ent guide base assembly 22 Worm wheel 2 23 Timing belt 31 Charge arm assembly 32 Connect gear 2 33 Connect gear 2 34 Rotaly encoder assembly 39 Arm gear 2 assembly 40 Clutch lock lever assembly 41 Capstan motor 42 Drum base deck 12 Main Brake Sup assembly 13 Main Brake Take up assembly 14 Reel disk assembly Sup 16 Prism 15 Reel dis...

Page 59: ...Wheel 2 See Fig 2 13 9A Arm Gear 1 Assembly See Fig 2 13 13B Rotary Encoder Assembly See Figs 2 13 9A and 2 13 13A Main Cam See Figs 2 13 13A and 2 13 13B Centering Arm Assembly See Fig 2 13 13B Clutch Lock Lever Assembly See Fig 2 13 14A Arm Gear 2 Assembly See Fig 2 13 14A Sub Cam See Fig 2 13 14A ...

Page 60: ...ing assembly in advance 1 Set the mechanism mode to the PLAY mode See pages 2 20 and 21 2 Loosen a screw A 3 Check the location of the tip section B of the tension arm assembly to make sure that it is within area C If it is located outside turn part D to bring it within the specified area 4 Tighten the screw A Note Tightening torque for the screw A 0 06 Nm 0 6 kgfcm ...

Page 61: ...tem are required use the following order for the adjustments 2 18 2 Adjustment The actual adjustment requires the following preparation 1 Tools required for adjustment Alignment tape US MC 1 PAL MC 2 SSS software PTU94016 3 Guide driver YTU94085 Jig connector cable PTU94018B PC cable US QAM0099 002 PAL QAM0099 005 Jig RCU PTU94023B 2 Procedure 1 Take out the 7 screws 1 to 7 then remove the top cov...

Page 62: ...gnment tape Play the alignment tape then set ATF Auto Tracking Find in Deck Controller of the SSS Software to ON Note 3 Connect an oscilloscope CH Slope and while triggering it with the HID signal observe the ENV OUT waveform The linearity adjustment is complete if the PB ENV waveform is ideally stable and varies ideally according to the tracking variation To close play a prerecorded tape and chec...

Page 63: ...is slack wind it up by turning the shaft on the topside of the capstan motor in the direction of the arrow using a pointed tool chip IC replacement jig This operation may be difficult because the shaft is lo cated below the housing motor of the cassette housing assembly Be careful not to damage parts during it 4 After confirming that the tape is fully wound up take out the cassette tape by turning...

Page 64: ...ON TAPE MANAGER OFF Unless otherwise specified all measuring points and adjustment parts are located on the Main board In the Signal column of the adjustment chart Ext S input means the Y C separated video signal and Ext input means the composite video signal input Jig RCU PTU94023B Alignment tape SP stairstep PAL MHPE Alignment tape LP stairstep PAL MHPE L LPF PTU93006 Alignment tape SP stairstep...

Page 65: ...justment tool H Jig RCU PTU94023B 1 Record the signal A2 in the mode B1 and play back the recorded signal 2 Press the channel buttons simultaneously to enter the manual tracking mode This also brings tracking to the center centre 3 Set the VCR to the FWD slow 1 6 mode 4 Transmit the code F from the Jig RCU to adjust so that the noise bar becomes the specified value G on the TV monitor in the slow ...

Page 66: ...5 Release the EVR mode of the VCR by transmitting the code F1 from the Jig RCU again When the EVR mode is released the adjusted data is memorized Fig 3 3 2a EE Y level H rate Specified value G 3 3 2 EE Y level Fig 3 3 3a PB Y level H rate Specified value G 7 Release the EVR mode of the VCR by transmitting the code F1 from the Jig RCU again When the EVR mode is released the adjusted data is memoriz...

Page 67: ...roller so that the higher level channel be comes the specified value G of the note B level as shown in Fig 3 3 4b Adjust before recording then con firm it by playing back 10 After adjustment record the signal A3 then playing it back again At this time confirm that there is no invert ing phenomenon or noise appearing on the playback screen 11 Release the EVR mode of the VCR by transmitting the code...

Page 68: ...djust with the channel buttons on the VCR or on the remote controller so that the A PB FM level of the higher channel level becomes the specified value G1 Adjust before recording then confirm it by playing back 8 If the specified value G1 is not obtained adjust with the channel buttons so that the waveform level of the lower channel level becomes the specified value G2 Adjust before recording then...

Page 69: ... is to prevent separation of the pattern 3 The connectors are fragile Be careful when plugging or unplugging a wire 3 6 2 Equipment required for adjustment 1 Personal computer Windows compatible 2 Color monitor 3 Oscilloscope 2 CH 100 MHz or more 4 Frequency counter Alignment tape US MC 1 PAL MC 2 SSS software PTU94016 3 Jig connector cable PTU94018B PC cable US QAM0099 002 PAL QAM0099 005 Jig RCU...