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SERVICE MANUAL

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1. Wire Board to board B B The connector of the side to remove conn no CONNECTOR PN Main CN101 Digital CN761 WR2b Main CN103 Digital CN762 B Destination of connectors conn no CONNECTOR Pnn Rza Mam onara lt Operation jack CNrab 13 Main CN3102 Junction CN710 Main CN200 e i 14 e 4 e Drum assembly le Main M aa Kea DVD unit igital CN2201 40 DVD unit lt gt Regulator CN5303 Junction CN7106 J D ID A J DII OIII 6 IoalNIN DISI D c g lo lo Digital CN1404 CN7108 CN1001 Digital CN1001 CN7109 CN1002 Digital CN1002 CN4104 CN1801 Jack ont er Digital CN1801 1 Junction CN7108 2 Junction CN7109 2 0 Junction CN7104 Main CN3103 Main CN2601 Junction CN7107 Regulator CN5304 Regulator CN5301 Regulator CN5302 3 1 2 How to read the procedure table This table shows the steps for disassembly of the externally fur nished parts and board assemblies Reverse these steps when re assembling them 8 8 4 15 11 13 15 15 2 VIDI D D D DD o 6 NINININI N o oo ojolo v 2 SD1a P1a W1a CN1 WR1a 2 S1c 1 2 3 4 5 1 Order of steps in Procedure When reassembling perform the step s in the reverse or der These numbers are also used as the identification loca tion No of parts Figures 2 Part name to be removed or installed 3 Fig No showing procedure or part loca
2. ur NOTE Pass slit PCB through wire TOP SIDE NOTE INSERT FFC WIRE TO THE CONNECTOR BEFORE ATTACHING TO FRONT PANEL Fig 3 1d 3 Cleaner assembly 5 Digital board assembly 6 Jack board assembly assembly 4 DVD unit 4 Bracket 9 Rear cover 8 Regulator board assembly e 7 Junction board N Q 3 uu ied PAS oT wsPT L3 ERO WRD G I r1 CM NUM IN CN8501 RAN n Y D el CN5001 K dus 2 Ef CN5302 E Q WR7d REGULATOR BOARD ASSY Note2a WR3b WR4b MAIN BOARD ASSY lt Note2a gt Teno i WR8a lt Note2a gt lt Note2a gt d m gt CN2001 eo b SN L J WR7e H gt X3 Nm i a Ne y CN5501 JUNCTION al SN E ot BOARD ASSY a LN NM 6 WR5a 2 1 lt Note2a gt _ ON n Lp 2 WR c 4 m th 3 lt NoteZa gt M WR3a 4 i aso hi T Nolo da oov isum m 2 our it suir WR4a m 8 d rai lt Note2Za gt _ K UN ros i it aS F55 dI n i or tit i WR7a S os lt Note2a gt DIGITAL P Mas o Ax 3 BOARD ASSY CN3102 El iONT d C0 0 eme one nn en ne
3. D FF Adjustment part A C head Mechanism assembly Specified value Maximum waveform To the drum Roller driver Toward the capstan 1 Play back the alignment tape A 2 Apply the external trigger signal to D FF E to observe the AUDIO OUT waveform and Control pulse waveform at the Fig 4 2e measuring points D1 and D2 in the ALT mode Alignment tape Alignment tape 3 Set the VCR to the manual tracking mode SP stairstep EP LP stairstep 4 Adjust the AUDIO OUT waveform and Control pulse wave played with the played with the form by turning the screws 1 2 and 3 little by little until SP head Ber ae both waveforms reach maximum The screw 1 and 3 are for adjustment of tilt and the screw 2 for azi muth Waveform output Head base X value adjustment point Drum side Control head position Capstan side gt gt Maximum Fig 4 2f 1 12 No YD006 4 3 Electrical adjustment Note The following adjustment procedures are not only necessary after replacement of consumable mechanical parts or board assemblies but are also provided as references to be referred to when servicing the electrical circuitry In case of trouble with the electrical circuitry always begin a service by identifying the defective points by using the measur ing instruments as described in the following electrical adjust ment procedures After this proceed to the repair repla
4. PLAY button on the unit for over 5 seconds while the unit is turned off The code currently set appears on the front display panel 5 Press the STOP button on the remote control to change the units code When FDP indicator displays DVD1 it means that the Remote Control Code has been changed to q 2 2 2 Setting the Jig RCU mode 1 Turn on the power 2 Press the VCR DVD button repeatedly on the unit so that the VCR lamp lights up on the unit 3 Press the following remocon keys continuously within 2 seconds SETUP gt 2 8 S9 ENTER When the VCR is set to the Jig RCU mode the symbols in the time display of the FDP are blinked Refer to Fig 2 2a User Jig RCU mode 2 2 3 Setting the User RCU mode 1 Turn off the power 2 Press the REC and PAUSE buttons of the VCR simul taneously Alternatively transmit the code 9D from the Jig RCU 2 3 Mechanism service mode This model has a unique function to enter the mechanism into ev ery operation mode without loading of any cassette tape This function is called the Mechanism service mode 2 3 1 How to set the Mechanism service mode 1 Set the VCR to the Jig RCU mode the mode in which codes from the Jig RCU can be received 2 Transmit the code E5 from the Jig RCU 3 Release the lug of the Cassette holder and then slide the Cassette holder toward the direction where the Cassette holder is loaded by manually 4 The cassette holder low
5. To quit the SYSTEM INFO menu transmit 8b from the JIG RCU 6 Cancel JIG RCU mode SYSTEM INFO VERSION INITIALIZE INFORMATION R EOE Ee Version of frmware TIETEEN this part is updated sfter the firmware of the unit is upgraded 0053 MTENO3 004 212 e System controller version Region code back end SET UP 9 DA ENTER SELECT WITH CURSORS Region code front end sii SELECT THEN PRESS ENTER SYSTEM INFO VERSION INITIALIZE INFORMATION BSP P201 A Drive firmware version SET UP R ENTER 9 SELECT WITH CURSORS aol SELECT THEN PRESS ENTER Items other than the ones described above are not used in service work NOTE 5 4 2 Upgrading firmware of the unit Firmware upgrade disk supports only DVD RAM media When firmware needs to be upgraded Digital Video Storage CSG will distribute a firmware upgrade disk 1 Set the unit to the Jig RCU mode 2 3 4 UPDATE appears in FDP load the upgrade disk on the disk tray then close the disk tray 5 Wait for approx 30 seconds while FDP is displayed as UPDATE 6 Then FW UPDATE appears in FDP It takes approx 3 minutes at maximum to upgrade firmware 7 The tray is ejected Then take out the disk and close the tray 8 The tray is ejected Then take out the disk and close the tray Turn off the unit and unplug the AC power cord from the AC outlet Then plug the AC power cord into the AC
6. fied 4 Use specified internal wiring Note especially Wires covered with PVC tubing Double insulated wires High voltage leads 5 Use specified insulating materials for hazardous live parts Note especially Insulation Tape e PVC tubing e Spacers Insulation sheets for transistors e Barrier 6 When replacing AC primary side components transformers power cords noise blocking capacitors etc wrap ends of wires securely about the terminals before soldering Moh 4 Fig 1 1 1 7 Observe that wires do not contact heat producing parts heatsinks oxide metal film resistors fusible resistors etc 8 Check that replaced wires do not contact sharp edged or pointed parts 9 When a power cord has been replaced check that 10 15 kg of force in any direction will not loosen it Power cord Fig 1 1 2 10 Also check areas surrounding repaired locations 11 Products using cathode ray tubes CRTs In regard to such products the cathode ray tubes themselves the high volt age circuits and related circuits are specified for compli ance with recognized codes pertaining to X ray emission Consequently when servicing these products replace the cathode ray tubes and other parts with only the specified parts Under no circumstances attempt to modify these cir cuits Unauthorized modification can increase the high volt age value and cause X ray emission from the cathode ray tube 12 Crimp type wire connectorln
7. thin tape T 140 10E1 13 Small reel thick tape T 120 DF 240 1073 14 Small reel thick tape T 130 1185 14 Small reel thin tape T 160 12D3 13 14 Small reel thin tape T 210 DF 420 1373 1403 13 14 Small reel thin tape T 180 DF 360 1357 14C0 13 14 Small reel thin tape T 168 1395 14EE 13 14 Small reel thick tape DF 300 16 Large reel T 20 17 Large reel T 30 18 Large reel T 40 Large reel T 60 Note e The values of cassette tape type lt 2 gt in the above table are typical values with representative cassette tapes 5 3 7 EMG detail information lt 3 gt Three deck operation modes preceding the deck operation mode in which the EMG occurs may be confirmed based on the figures in the EMG information detail lt 3 gt For the contents of the dis played information see the table Deck operation mode in sec tion 5 3 5 EMG detail information lt 1 gt 5 4 Display function of DVD section 5 4 1 Displaying SYSTEM INFO SYSTEM INFO contains information on firmware version of the unit and the mechanism drive and an initialize execution menu 1 Set the unit to the Jig RCU mode 2 Transmit 8b from the JIG RCU 3 SYSTEM INFORMATION menu is displayed in the screen 4 To move cursor in SYSTEM INFO use the a 4 and buttons of a remote control unit attached to product 5
8. 71 or 72 minimum noise Jig RCU PTU94023B Measuring point Specified value Adjustment tool 1 Record the signal A2 in the mode B1 and play back the recorded signal 2 Set the VCR to the manual tracking mode 3 Set the VCR to the FWD slow 1 6x 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 mode 5 Set the VCR to the Stop mode 6 Confirm that the noise bar is G on the TV monitor in the slow mode 7 Repeat steps 3 to 6 in the REV slow 1 6x mode 8 Repeat steps 1 to 7 in the mode B2 Note For FWD slow 1 6x playback transmit the code 08 from the Jig RCU to enter the slow playback mode and transmit the code DO for REV slow 1 6x mode 4 3 2 DVD Video circuit Note when perform these adjustments set the unit to DVD mode DVD lamp lights up 4 3 2 1 EE COMPONENT Y level 1 00 x 0 02 Vp p terminated Jig RCU PTU94023B Specified value E Signal A Internal color bar Mode B EE Equipment C Oscilloscope Measuring point D COMPONENT Y terminal EVR mode F1 Jig code 95 EVR address F2 ADJUSTO1 F3 Jig code 21 FA Jig code 18 or 19 Channel F5 Jig code 3C Adjustment tool 3 1 Observe the Y OUT waveform at the measuring point D
9. a drop in level is found on the left side turn the guide roll er 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 4 2c 6 Make sure that the V PB FM waveform varies in parallel Adjust pin Mechansim assembly 1 Play back the back tension cassette gauge A 2 Check that the indicated value on the left side gauge is within the specified value G 3 If the indicated value is not within the specified value G perform the adjustment in a following procedure See Fig 4 2a a Remove the top frame cassette holder and side frames L R all together Refer to the SERVICE l MANUAL No 86700 MECHANISM ASSEMBLY and linearly with the tracking operation again When re b Rotate the loading motor gear to move the control quired perform fine adjustment of the guide roller of the plate so that the triangular stamping to the left of the polg nase assem y ASUPPY OF TAKE UP SIde P stamping is aligned with the stamping a on the 7 Unload the cassette tape once play back the alignment main deck This positioning is mode B1 g e d Pull s LH aie iii er te t c Adjust by turning the adjustment pin so that the tip of toS AOU REN Con ruere de TAPE ANNK COE a occur at the roller upper or lower limits See F
10. and DTS Digital Out are trademarks of Digital Theater Systems Inc e amp i Link refers to the IEEE1394 1995 industry specification and extensions thereof The amp logo is used for products compliant with the i Link stan dard 2 No YD006 SECTION 1 PRECAUTION 1 4 SAFTY PRECAUTIONS Prior to shipment from the factory JVC products are strictly in spected to conform with the recognized product safety and elec trical codes of the countries in which they are to be sold However in order to maintain such compliance it is equally important to implement the following precautions when a set is being serviced 1 1 1 Precautions during Servicing 1 Locations requiring special caution are denoted by labels and inscriptions on the cabinet chassis and certain parts of the product When performing service be sure to read and comply with these and other cautionary notices appearing in the operation and service manuals 2 Parts identified by the AAsymbol and shaded parts are critical for safety Replace only with specified part numbers NOTE Parts in this category also include those specified to comply with X ray emission standards for products using cathode ray tubes and those specified for compliance with various regulations regarding spu rious radiation emission 3 Fuse replacement caution notice Caution for continued protection against fire hazard Replace only with same type and rated fuse s as speci
11. mA dc Other terminals Fig 1 1 12 NOTE These tables are unofficial and for reference only Be sure to confirm the precise values for your particular country and locality 1 4 No YD006 SECTION 2 SPECIFIC SERVICE INSTRUCTIONS 2 1 Service position This unit has been designed so that the Mechanism and Main board assemblies can be removed together from the bottom chassis Before diagnosing or servicing the circuit boards take out the major parts from the bottom chassis 2 1 1 How to set the Service position 1 Refer to the disassembly procedure and perform the disas sembly of the major parts before removing the Mechanism assembly 2 Remove the screws that fix the Mechanism Main board as sembly to the bottom chassis If any other screws are used to fix the boards remove them also 3 Remove the combined Mechanism DVD unit regulator digital junction and Main board assemblies 4 If any other major parts are used remove them also 5 Connect the wires and connectors of the major parts that have been removed in steps 1 to 4 Refer to Fig 2 1a 6 Place the combined Mechanism Main board and other board assemblies upside down 7 Insert the power cord plug into the power outlet and then proceed with the diagnostics and servicing of the board as sembly Notes Before inserting the power cord plug into the power out let make sure that none of the electrical parts are able to short circuit be
12. outlet 9 LOADING of FDP disappears then turn on the unit 10 Display the SYSTEM INFO menu and check the version of the firmware 11 Cancel the JIG RCU mode ATTENTION Firmware may sometimes not be upgraded successfully If firmware is not upgraded successfully the tray opens and ERROR appears in FDP If firmware is upgraded successfully the tray opens and OPEN appears in FDP If unplug the AC power cord from the AC outlet while ERROR appears data in the flash memory is destroyed and the unit cannot start the flash memory needs to be replaced After upgrading procedure pay enough attention to FDP when the tray opens When ERROR appears upgrade firmware again in the following way to restore the firmware 1 Transmit 70 from theJIG RCU while the tray opens 2 When UPDATE appears in FDP close the tray and make the unit read the disk Upgrading starts 3 After 2 perform upgrading procedure 4 10 of 5 4 2 Upgrading firmware of the unit above No YD006 1 21 5 4 3 The exchange method of a tray fitting When DVD unit is exchanged please transplant a tray fitting from an old drive or change for a new tray fitting 5 4 4 Initialization method tomer All initial setting of DVD returns to an initial state 1 Set the unit to theJIG RCU mode 2 Set the unit to DVD mode DVD lamp lights up 3 Press the POWER button on the unit to turn off the unit 4 Transmit GF from the JIG RCU 5 Confir
13. such cases as when replacing the power transformer in sets where the connections be tween the power cord and power trans former primary lead wires are performed using crimp type connectors if replac ing the connectors is unavoidable in order to prevent safe ty hazards perform carefully and precisely according to the following steps Connector part number E03830 001 Required tool Connector crimping tool of the proper type which will not damage insulated parts Replacement procedure a Remove the old connector by cutting the wires at a point close to the connector Important Do not re use a connector discard it X A e Ge cut close to connector Fig 1 1 3 b Strip about 15 mm of the insulation from the ends of the wires If the wires are stranded twist the strands to avoid frayed conductors 1 eA A Fig 1 1 4 c Align the lengths of the wires to be connected In sert the wires fully into the connector Metal sleeve Connector Fig 1 1 5 d As shown in Fig 1 1 6 use the crimping tool to crimp the metal sleeve at the center position Be sure to crimp fully to the complete closure of the tool Crimping tool Fig 1 1 6 e Check the four points noted in Fig 1 1 7 Crimped at approx center Not easily pulled free of metal sleeve Conductors extended Wire insulation recessed more than 4 mm Fig 1 1 7 No YD006 1 3 1 1 2 Safety Check after Servicing Examine the area surround
14. to STOP at power OFF Transition from pinch roller ON to STOP at power ON Transition to PLAY Transition to Search FF Transition to REC Transition to FWD STILL SLOW Transition to REV STILL SLOW Transition to Search REV Transition from FF REW to STOP Transition to FF Transition to REW Tape end detection processing during loading Short FWD REV at tape sensor ON during unloading Transition to FF REW brake mode STOP with pinch roller pressure off STOP with pinch roller pressure on U L STOP or tape being loaded PLAY Normal playback PLAY x1 speed playback using JOG REC Cassette ejected FF FWD SEARCH variable speed including x2 speed INSERT REC REW REV SEARCH AUDIO DUB INSERT REC VIDEO AUDIO FWD STILL SLOW REV STILL SLOW REC PAUSE INSERT REC PAUSE REV SEARCH x1 speed reverse playback using JOG AUDIO DUB PAUSE INSERT REC VIDEO AUDIO PAUSE Mechanism being initialized POWER OFF as a result of EMG Cassette being inserted Cassette being ejected Transition from STOP with pinch roller pressure on to STOP with pinch roller pressure off Transition from STOP with pinch roller pressure on to PLAY Transition from STOP with pinch roller pressure on to REC Cassette type detection SEARCH before FF REW is being executed Tape being unloaded Transition from STOP with pinch roller pressure off to STOP with pinch r
15. 002 on gt 1 Play back the alignment tape A1 5 Rotate the roller driver so that the A C head comes closest to the capstan From there move the A C head back grad ually toward the drum until the point where the FM wave form is maximized for the second time and then tighten the screws 4 and 5 temporarily 6 Play an alignment tape A2 and set to the manual tracking B 2 Apply the external trigger signal to D FF E to observe the pes A Roller driver V PB FM waveform at the measuring point D N NNI 3 Set the VCR to the manual tracking mode E LN 4 Loosen the screws 4 and 5 then set the Roller driver to the innermost projected part of the A C head See Fig 4 2e 1 Guide roller D gt supply side 46 0x Ih bo N mode Fig 4 2 7 Fine adjust A C head base position to maximize the FM Ig t ec waveform and then tighten the screws 4 and 5 firmly 4 2 3 Height and tilt of the A C head 8 Play alignment tapes A1 and A2 and confirm that the FM Note waveforms are maximized when the tracking is at the cen Setatemporary level of the height of the A C head in ad ter position vance to make the adjustment easier after the A C head has been replaced Refer to the SERVICE MANUAL No 86700 MECHANISM ASSEMBLY Signal Alignment tape SP stairstep NTSC MHP Mode PB Equipment Oscilloscope Measuring point TP106 PB FM TP4001 CTL P External trigger TP111
16. 1 2 Connect the short wire between the short point D2 and Vcc 5V 3 Short the leads of capacitor D3 once in order to reset the microprocessor of the Syscon 4 Disconnect the short wire between the short point D2 and Vcc then connect it again 5 Adjust the Adjustment part F so that the output frequency becomes the specified value G SECTION 5 TROUBLESHOOTING 5 1 Manually removing the cassette tape If you cannot remove the cassette tape which is loaded because of any electrical or mechanical failures manually remove it by taking the following steps 1 Unplug the power cord plug from the power outlet 2 Refer to the disassembly procedure of the VCR and per form the disassembly of the major parts before removing the mechanism assembly See Fig 5 1a j 7S a B f f a 22 E TET r o P EFNS VAI E Tension arm assembly Pole base assembly Pinch roller arm assembly ORANA S LJ ARO i 9 a m C4 s Nr INS NU ZA LE TENEO i LJ Sm E 0 BIS li AL eo SS WNN ATE RTTETHEET TEES C ED Fig 5 1b 3 Unload the pole base assembly by manually turning the gear of the loading motor until the pole base assembly is hidden behind the cassette lid In doing so hold the tape by the hand to keep the slack away from any grease See Fig 5 1b In case of mechanical failures while keeping the ten sion arm assembly free from tension pull out the tape on the pole base assembly Take the sp
17. 2 Set the VCR to the EVR mode by transmitting the code F1 from the Jig RCU 3 Set the EVR address to F2 by transmitting the code F3 from the Jig RCU 4 Transmit the code F4 from the Jig RCU to adjust so that the Y level of the Y OUT waveform becomes the specified value G 5 Release the EVR mode of the VCR by transmitting the code F5 from the Jig RCU again When the EVR mode is released the adjusted data is memorized Fig 4 3b EE componet Y level No YD006 1 13 4 3 2 2 EE Y level Jig code 3C Specified value 5 1 00 x 0 02 Vp p terminated Signal A1 Ext input A2 Color colour bar signal Mode B EE Equipment C Ie Oscilloscope Measuring point D Y OUT S terminal EVR mode F1 Jig code 95 EVR address F2 ADJUSTO2 F3 Jig code 22 FA Jig code 18 or 19 Channel Adjustment tool 1 Observe the Y OUT waveform at the measuring point D 2 Set the VCR to the EVR mode by transmitting the code F1 from the Jig RCU 3 Set the EVR address to F2 by transmitting the code F3 from the Jig RCU 4 Transmit the code F4 from the Jig RCU to adjust so that the Y level of the Y OUT waveform becomes the specified value G 5 Release the EVR mode of the VCR by transmitting the code F5 from the Jig RCU again When the EVR mode Jig RCU PTU94023B is released
18. JVL SERVICE MANUAL DVD VIDEO RECORDER amp VIDEO CASSETTE RECORDER DR MV1SUC DR MV1SUS CABLE DBS V DVD VCR Dvb veri TVCBLDBS TIMER DVD DVD cs Dobos DIGITAL COMPACT COMPACT DIGITAL AUDIO e VIDEO CD P ig fl NUS lus pe DR MV1SUC DR MV1SUS D3RV21 VERGE 7f us SQPB For disassembling and assembling of MECHANISM ASSEMBLY refer to the SERVICE MANUAL No 86700 MECHANISM ASSEMBLY TABLE OF CONTENTS 1 PRECAUTION cocescncanteeesneecd eetateden ceded se ateeecdede sede dacdedeteedeodegaccees 1 3 2 SPECIFIC SERVICE INSTRUCTIONS sseeeeeeeeeeeeee eee 1 5 3 DISASSEMBLY 2 592aw63 ESTIS CPI RE ESOS eade dee eR DE E dd Id thee ene d d Read 1 7 4 ADJUSTMENT a222252939592 5 eee eR ERE ES IUEPRRRE ERU LEN RIPOaS REQUIRE NEIGE MEE E 1 10 D TROUBLESHOOTING ici iuris Satana cios Queer deu E hehe eed eee Cee eee eee eee 1 15 COPYRIGHT 2004 VICTOR COMPANY OF JAPAN LIMITED No YD006 2004 4 SPECIFICATION a DR MVISUS GENERAL Power on 43 W Operating 5 C to 35 C 41 F to 95 F Storage 20 C to 60 C 4 F to 140 F Dimensions W X H X D 435 mm x 96 mm x 347 mm 17 3 16 x 3 13 16 x 13 11 16 Weight 6 1 kg 13 5 Ibs VIDEO AUDIO DVD Deck Recording format DVD RAM DVD Video Recording format DVD R DVD Video format DVD RW DVD Video format DVD Video Recording format Recording time Maximum 8 hours with 4 7 GB disc XP Appro
19. a placed the A C head drum assembly or any part of the tape transport system To prevent damaging the alignment tape in the compat Signal Alignment tape SP stairstep NTSC MHP ibility adjustment prepare a cassette tape for self re SEE ee eee Ne AA CONTROL PLATE o Eee o ADJUST PIN cording playback perform a test on it by transporting it liiis i Equipment Oscilloscope and making sure that the tape is not bent by the tape i Measuring point TP106 PB FM transport mechanisms such as in the guide rollers See Fig 4 2b External trigger TP111 D FF j Adjustment part Guide roller Mechanism assembly 4 2 1 Tension pole position Specified value Flat V PB FM waveform Notes Adjustment tool H Roller driver PTU94002 This adjustment must be performed every time the ten 1 Play back the alignment tape A1 sion band is replaced 2 Apply the external trigger signal to D FF E to observe Back tension cassette gauge PUJ48076 2 the V PB FM waveform at the measuring point D BE 3 Set the VCR to the manual tracking mode Eject end 4 Make sure that there is no significant level drop of the V PB FM waveform caused by the tracking operation with its generally parallel and linear variation ensured Perform the 25 51 gf cm 2 45 5 x 10 Nm following adjustments when required See Fig 4 2c 5 Reduce the V PB FM waveform by the tracking operation If
20. al data display area DD Sensor information details Display Encoder data See Mechanism mode sequence Remote pause End sensor Start sensor Cassette tab present 1 Cassette tab broken 0 For both MN HD Mechanism mode sequence Ot im p o O O OOO LSA LSD Encoder output Low Trerminal CND SHORT No Position Encoder data O EJECT 0 h 0000 o EJECT1 1 h 0001 Iol EJECT2 2 h 0010 ULSTOP 3 h 0011 6 UPPER 4 h 0100 0 ONSTOP PLAY 5h 0101 D FWD SS 6h 0110 8 REWSS 7h 0111 9 X OFFSTOP _ 8h 1000 W FFREW Ah 1010 MIDDLE Fh 1111 No YD006 1 17 5 3 4 EMG content description Note EMG contents E09 are for the model with Dynamic Drum DD CONTENT CAUSE E01 Loading EMG E02 Unloading EMG E03 Take Up Reel Pulse EMG Drum FG EMG Cassette Eject EMG Capstan FG EMG SW Power Short Circuit EMG E08 DVD EMG E09 DD FG EMG EOA Supply Reel Pulse EMG EU1 Head clog warning history 1 18 No YD006 If the mechanism mode does not change to the next mode within 4 sec onds after the loading motor starts rotating in the loading direction while the mechanism is in the after loading position with the tape up against the pole base E 01 is identified and the power is switched OFF However if the tape loading is not completed within 4 seconds after the loading motor st
21. arts rotating in the loading direction the tape is simply unloaded and ejected No EMG data is recorded in this case When the mechanism mode cannot be changed to another mode even when the loading motor has rotated for more than 4 sec onds in the unloading direction E 02 is identified and the power is turned off When the falling edje of the take up reel pulse has not been gen erated for more than 4 seconds in the capstan rotating mode E 03 is identified the pinch rollers are turned off and stopped and the power is turned off In this case however the mecha nism should be in position after tape loading Note that the reel EMG is not detected during Slow Frame advance operations When the drum FG pulse has not been input for more than 3 sec onds in the drum rotating mode E 04 is identified the pinch roll ers are turned off and stopped and the power is turned off If the cassette does not reach the eject position within about 0 7 seconds after the cassette housing has started the cassette ejec tion operation E 05 is identified the drive direction is reversed to load the tape the mode is switched to STOP mode with the pinch roller OFF and the power is switched OFF During the cassette insertion process the drive direction is reversed and the cassette is ejected if the tape is not up against the pole base within about 3 seconds after the start of the cassette pulling in operation If the cassette does not reach the ej
22. attern e Color colour bar signal NTSC Color colour bar pattern NTSC White 100 75 White 75 8 gt 100 IRE 1V 40 IRE Horizontal sync 1 10 No YD006 4 1 5 Switch settings When adjusting this unit set the VCR mode and switches as described below e When using the Jig RCU it is required to set the VCR to the Jig RCU mode the mode in which codes from the Jig RCU can be received See section 2 SPECIFIC SERVICE INSTRUC TIONS Jig RCU Data transmitting method Depress the 3 B button after the data code is set Crm 43 003 INITIAL MODE CUSTOM CODE 43 A CODE DATA CODE Fig 4 1 Jig RCU PTU94023B Set the switches as shown below unless otherwise specified on the relevant adjustment chart The switches that are not list ed below can be set as desired If the VCR is not equipped with the functions detailed below setup is not required AUTO PICTURE VIDEO CALIBRATION OFF B E S T D S P C PICTURE CONTROL SMART PICTURE NORMAL NATURAL VIDEO STABILIZER OFF TBC ON Digital 3R ON VIDEO NAVIGATION TAPE MANAGER OFF BLUE BACK OFF 4 1 6 Manual tracking mode Auto tracking ON OFF set ting 1 In order to set to the manual tracking mode during tape playback press the SP EP LP button on the remote con trol unit e Each press of the button switches the auto tracking ON or OFF e When the manual tracking mode is set the tracking is placed a
23. cement and or adjustment If the required measuring in struments are not available in the field do not change the ad justment parts variable resistor etc carelessly 4 3 1 Servo circuit 4 3 1 1 Switching point Signal A1 Stairstep signal A2 Alignment tape EP stairstep NTSC MHP L Mode B PB Equipment C Oscilloscope D VIDEO OUT terminal 75 ohm terminated e P106 PB FM External trigger E e TP111 D FF Adjustment part F Jig RCU Code 5A Specified value G 6 5 0 5H Adjustment tool H Jig RCU PTU94023B 1 Play back the signal A1 of the alignment tape A2 2 Apply the external trigger signal to D FF E to observe the VIDEO OUT waveform and V PB FM waveform at the measuring points D1 and D2 3 Set the VCR to the manual tracking mode 4 Adjust tracking so that the V PB FM waveform becomes maximum 5 Set the VCR to the Auto adjust mode by transmitting the code F from the Jig RCU When the VCR enters the stop mode the adjustment is completed 6 If the VCR enters the eject mode repeat steps 1 to 5 again 7 Play back the alignment tape A2 again confirm that the switching point is the specified value G Measuring point Trigger point Switching point Fig 4 3a Switching point 4 3 1 2 Slow tracking preset Ext input Color colour bar signal NTSC VHS SP VHS EP TV Monitor Jig RCU Code
24. classified Notes Cassette tape type 1 is identified a few times during mode transition and the identification count is variable depending on the cassette tape type If an EMG occurs in the middle of identification the cassette tape type may not be able to be identified If other value than those listed in the above table is dis played the cassette tape type is not identified 6 Cassette tape winding position The cassette tape winding position at the moment of EMG is dis played by dividing the entire tape from the beginning to the end in 21 sections using a hex number from 00 to 14 00 End of winding 14 Beginning of winding FF Tape position not identified 7 Cassette tape type 2 Winding area Reference Word data Display Cassette tape type 2 Beginning End 00 Cassette type not identified J y O 04 08 j e cassete tiok lope Toit 0497 0506 0732 0858 05 06 Small reel thick tape T 20 05A9 0661 05 OC C cassette thick tape TC 20P__ 0599 05FF 0AA1 0C07 06 OC C cassette thin tape TC 40 0623 063D 0C41 0CC3 06 OC C cassette thin tape TC 30 0611 0638 0C0C 0CB2 07 08 Small reel thick tape T 40 07CC 08E5 07 09 0B Small reel thick tape T 60 09FD Small reel thick tape T 80 DF 160 0C20 Small reel thick tape T 90 DF 180 0D31 Small reel thick tape T 100 0E43 12 Small reel
25. d plug prongs and externally ex posed accessible parts Use an AC voltmeter to measure across both terminals of load Z See Fig 1 1 9 and follow ing Fig 1 1 12 Externally exposed accessible part Fig 1 1 9 5 Grounding Class 1 model only Confirm specified or lower grounding impedance between earth pin in AC inlet and externally exposed accessible parts Video in Video out Audio in Audio out or Fixing screw etc Measuring Method Connect milli ohm meter between earth pin in AC inlet and exposed accessible parts See Fig 1 1 10 and grounding specifications Exposed accessible part Milli ohm meter Grounding Specifications Region Grounding Impedance Z USA amp Canada Z 0 1 ohm Europe amp Australia lt 0 5 ohm Fig 1 1 10 AC Line Voltage Region Insulation Resistance R Dielectric Strength Clearance Distance d d 10V J R2 1MO 500 V DC AC1kV1minute kV 1 minute d d 2 3mm ev A to 240 V epe E 5 kV 1 minute d 2 110 to 130 V USA amp Canada 1MQ SRS 12 MQ 500 V DC AC 1 KV 1 minute dd 3 2mm AC 3 kV 1 minute d 2 4mm 110 to 130 V l Clase D c amp A R210MQ gt 200 to 240 V Europe ustralia 10 MQ 500 V DC AC 1 5 kV 1 minute d 2 8mm Power cord Class I d 2 6 mm Primary wire Fig 1 1 11 AC Line Voltage Leakage Current Leakage Current i a Veo lt 0 7 mA k 110 to 130 V 110 to 130 V 220 to 240 V Europe amp Australia 2 i 0 7 mA peak i lt 2
26. e on contact parts is soiled wipe it off and newly lubricate the parts Note See the mechanism assembly diagram of the parts list for the lubricating or greasing spots and for the types of oil or grease to be used 2 4 5 Suggested servicing schedule for main components The following table indicates the suggested period for such ser Vice measures as cleaning lubrication and replacement In prac tice the indicated periods will vary widely according to environmental and usage conditions However the indicated components should be inspected when a set is brought for ser vice and the maintenance work performed if necessary Also note that rubber parts may deform in time even if the set is not used Operation hours Parts name 1000H 2000H Drum assembly C X X A C head C X e x Pinch roller arm assembly C Full erase head Tension arm assembly Capstan motor Shaft C C C C Guide arm assembly Capstan motor Capstan brake assembly Main brake assembly Belt Capstan Loading motor Clutch unit Worm gear Control plate X X X XIXI X DX KL KO OL OO oO 0 Rotary encoder C Cleaning X Inspection or Replacement if necessary SECTION 3 DISASSEMBLY 3 1 Removing the major parts 3 1 1 Destination of connectors Two kinds of double arrows in connection tables respectively show kinds of connector wires Flatwire
27. ect or perhaps the user s hand was caught in the opening of the housing The capstan could not start or the capstan rotation has stopped due to too large a load on the tape because 1 The tape tension is abnormally high mechanical lock 2 The tape is damaged or a foreign object grease etc is adhered to the tape occurrence of tape entangling etc The capstan FG pulse did not reach the System controller CPU because 1 The signal circuit is disconnected in the middle 2 The FG pulse generator MR device of the capstans is faulty The capstan control voltage CAPSTAN CTL V is not supplied to the MDA Power M12V SW5V are not supplied to the capstan MDA The SW 5 V power supply circuit is shorted with GND The SW 12 V power supply circuit is shorted with GND The DVD unit is defective Contact failure of the wires in the DVD unit or VHS side The FG sensor is defective The soldered parts have separated The pull up resistor at the FG sensor output is defective The soldered parts have separated Contact failure or soldering failure of the pins of the connector board to board to the FG sensor The power 5V to the sensor is not supplied Connection failure soldering failure The FG pulse is not sent to the System Controller CPU The tilt motor is defective The soldered parts have separated The drive power to the tilt motor is not supplied Connection failure soldering failure The ti
28. ect position within about 0 7 seconds after the drive mode reversal operation E 05 is identified and the power is switched OFF immediately When the capstan FG pulse has not been generated for more than 1 second in the capstan rotating mode E 06 is identified the pinch rollers are turned off and stopped and the power is turned off However the capstan EMG is not detected in SLOW STILL modes Note that if the part number of the System Control IC begins with MN or M3 the capstan EMG is not detected even during the FF REW operation When short circuiting of the SW power supply with GND has lasted for 0 5 second or more E 07 is identified all the motors are stopped and the power is turned off When communication with a system computer of VHS side is not carried out because of the defective DVD unit or when the DVD unit must be reset When the DD FG pulse is not generated within 2 5 seconds E 09 is identified the tilt motor is stopped and the power is turned off When the falling edge of the supply reel pulse has not been gen erated for more than 10 seconds in the capstan rotating mode E 0A is identified and the cassette is ejected but the power is not turned off In this case however the mechanism should be in the position after tape loading with the tape up against the pole base Also note that the reel EMG is not detected during Slow Frame advance operations 1 The mechanism is locked in the middle of
29. ers and when the loading has completed the mechanism enters the desired mode When the VCR is set to the Mechanism service mode the symbols HDD in the FDP LED are turned on 2 3 2 How to exit from the Mechanism service mode 1 Unplug the power cord plug from the power outlet 2 4 Maintenance and inspection 2 4 4 Cleaning Regular cleaning of the transport system parts is desirable but practically impossible So make it a rule to carry out cleaning of the tape transport system whenever the machine is serviced When the video head tape guide and or brush get soiled the playback picture may appear inferior or at worst disappear re sulting in possible tape damage Note Absolutely avoid sweeping the upper drum vertically as this will cause damage to the video head 1 When cleaning the upper drum especially the video head soak a piece of closely woven cloth with alcohol and while holding the cloth onto the upper drum by the fingers turn the upper drum counterclockwise 1 6 No YD006 2 To clean the parts of the tape transport system other than the upper drum use a piece of closely woven cloth or a cot ton swab soaked with alcohol 3 After cleaning make sure that the cleaned parts are com pletely dry before using the cassette tape A C head Video heads Fig 2 4a 2 4 2 Lubrication With no need for periodical lubrication you have only to lubricate new parts after replacement If any oil or greas
30. g area 4 Transmit the code 59 from the Jig RCU once again The FDP shows the EMG detail information 3 in the form of 8 9 10 8 Previous deck operation mode at the moment of EMG 9 The deck operation mode of the one before the last at the moment of EMG 10 The deck operation mode of the one prior to one above at the moment of EMG 5 Transmit the code 59 from the Jig RCU once again to re set the display 5 3 2 Clearing the EMG history 1 Display the EMG history 2 Transmit the code 36 from the Jig RCU 3 Reset the EMG display 5 3 3 Details of the OSD display in the EMG display mode During the EMG display the OSD shows the data on the deck mode etc The details of the display contents are as follows Notes The display is variable depending on the part No of the System Control microcomputer 1C3001 built into the VCR In the following refer to the figure carrying the same two characters as the top two characters of the part number of your IC The sensor information in the OSD display contents is partially different from the mechanism sensor informa tion in EMG detail information 1 For MN only AA Deck operation mode See EMG detail information lt 1 gt BB Mechanism operation mode See EMG detail of information lt 1 gt CC Mechanism transition flag DD Capstan motor control status EE Loading motor control status FF Sensor information See senso
31. her parts especially the vid eo heads Also take care not to damage the connectors a Shaft Motor gt Video heads TS Fig 3 1c 1 8 No YD006 NOTE 1 Insert direction of FCC WIRE as follows right side back side electrode side supporting side 2 FFC WIRE and DRUM FPC WIRE should be insert as follows 3 Insert the wire to even the root of connector completely at the same time as inserting each wire 4 Check to see that outside parts TOP COVER BOTTOM COVER FRONT PANEL etc are fixed certainly to the BOTTOM CHASSIS with SCRWES 5 Pay attention NOT to make any scratches on FRONT PANEL 6 Pay close attention not to cut any Sheath of WIRE by sharp edge of CHASSIS while Wireing Process 3 Mechanism assembly 10 Main board assembly 383001 1 lt Phase alignment gt Accord the position of V gap on R ENCORDER and PWB silk d Accord the position of Boss on R ENCORDER and PWB silk Cassette door Note2b WR2a BOTTOM SIDE lt Note2a gt OPERATION JACK BOARD ASSY WR2b lt Note2a gt L2b v 2 Front panel assembly 3 Drum assembly WR2c SNoteza gt SWITCH DISPLAY BOARD ASSY CED E onl L NOTE Push the slack of the wire into the FW7001 side EL nex
32. ig 4 2b the tension arm is aligned with the stamping b on he maideck Perform adjustment step 9 only for the models equipped d Rotate the reel disk S by about one turn clockwise with SP mode and EP or LP mode and make sure that the round hole of the adjustment Perform adjustment step 9 only for the models pin is located in the OK range If it is outside this equipped with SP mode and EP or LP mode range restart the adjustment from the beginning 9 Repeat steps 1 to 8 by using the alignment tape A2 After completion of the adjustment rotate the loading gear motor to return it to the mode B2 position SUBIDO Proper dre M a GUIDE ROLLER HA ne b GUIDE POLE Fig 4 2b No YD006 1 11 4 2 4 A C head phase X value Proper waveform variation Signal A1 Alignment tape SP stairstep NTSC MHP LON ee TD oom A2 Alignment tape EP stairstep NTSC MHP L Mode B PB Equipment C Oscilloscope QUII Mn Vecciangeone Oy le SIE 106 ee END Improper waveform variation External trigger E TP111 D FF Up J n Adjustment part F A C head base Mechanism assembly DEDE UI gt mmm DU c m Specified value G Flat V PB FM waveform Adjustment tool H Roller driver PTU94
33. inding position of the cassette tape in use EMG detail information 2 gt See 5 3 6 Type of the cassette tape in use 2 Winding area EMG detail information 3 See 5 3 7 Previous deck operation mode EMG detail information 3 x See 5 3 7 The deck operation mode of the one before the last EMG detail information 3 See 5 3 7 The deck operation mode of the one prior to one above EMG display of 7 FDP display model Fig 5 3b NO N gt See 5 3 5 oO D gt N O C1 A Co N O C1 Co co i d i i i i o O 1 16 No YD006 EMG display of FDP display mode 1 Transmit the code 59 from the Jig RCU The FDP shows the EMG content in the form of E Example 1 gt E 01 Latest EMG Example 2 E No ENG record 2 Transmit the code 59 from the Jig RCU again The FDP shows the EMG detail information 1 in the form of 1 2 34 1 Deck operation mode at the moment of EMG 2 Mechanism operation mode at the moment of EMG 3 Mechanism sensor information at the moment of EMG 4 Mechanism mode position at the moment of EMG 3 Transmit the code 59 from the Jig RCU once again The FDP shows the EMG detail information 2 in the form or 75 6 7 5 Type of the cassette tape in use 1 6 Winding position of the cassette tape in use T Type of the cassette tape in use 2 Windin
34. ing the repaired location for damage or deterioration Observe that screws parts and wires have been returned to original positions Afterwards perform the following tests and confirm the specified values in order to verify compli ance with safety standards 1 Insulation resistance test Confirm the specified insulation resistance or greater be tween power cord plug prongs and externally exposed parts of the set RF terminals antenna terminals video and audio input and output terminals microphone jacks ear phone jacks etc See table 1 below 2 Dielectric strength test Confirm specified dielectric strength or greater between power cord plug prongs and exposed accessible parts of the set RF terminals antenna terminals video and audio input and output terminals microphone jacks earphone jacks etc See Fig 1 1 11 below 3 Clearance distance When replacing primary circuit components confirm spec ified clearance distance d d between soldered termi nals and between terminals and surrounding metallic parts See Fig 1 1 11 below Chassis Power cord primary wire 4 Leakage current test Confirm specified or lower leakage current between earth ground power cord plug prongs and externally exposed ac cessible parts RF terminals antenna terminals video and audio input and output terminals microphone jacks ear phone jacks etc Measuring Method Power ON Insert load Z between earth ground power cor
35. ism being initialized 00 STOP with pinch roller pressure off or tape present with P OFF 01 STOP with pinch roller pressure on POWER OFF as a result of EMG 04 PLAY Normal playback OE REC 11 Cassette ejected 22 FF Tape fully loaded START sensor ON short FF Cassette identification FWD SEARCH before transition to FF SPx7 speed FWD SEARCH variable speed including x2 speed INSERT REC REW Cassette identification REV SEARCH before transition to REW SPx7 speed REV SEARCH variable speed AUDIO DUB INSERT REC VIDEO AUDIO FWD STILL SLOW REV STILL SLOW REC PAUSE Back spacing Forward spacing FWD transport mode with BEST function INSERT REC PAUSE INSERT REC back spacing AUDIO DUB PAUSE AUDIO DUB back spacing INSERT REC VIDEO AUDIO PAUSE INSERT REC VIDEO AUDIO back spacing 2 Mechanism operation mode Table of MN Command standby No command to be executed Immediate Power OFF after EMG occurrence Loading from an intermediate position during mechanism initialization Unloading due to EMG occurrence during mechanism initialization Ejecting cassette ULSTOP to EJECT Inserting cassette EJECT to ULSTOP Loading tape ULSTOP to PLAY Unloading tape PLAY to ULSTOP Transition from pinch roller ON to STOP Transition from pinch roller OFF to STOP PLAY to OFFSTOP Transition from pinch roller OFF
36. l Slow position FWD SS REV Intermodal position REV REV REV Still Slow position REV OFFSTOP Intermodal position OFFSTOP Pinch roller OFF position FFREWB FF REW Brake position 5 3 6 EMG detail information 2 The type of the cassette tape and the cassette tape winding po sition can be confirmed based on the figure in EMG detail infor mation 2 Note e EMG detail information 2 is the reference information stored using the remaining tape detection function of the cassette tape As a result it may not identify cas sette correctly when a special cassette tape is used or when the tape has variable thickness Odd number 1 3 5 T 9 B D F 1 20 No YD006 5 Cassette tape type lt 1 gt Display Cassette tape type ci Cassette type not identified Large reel small reel T 0 to T 15 T 130 to T 210 not classified Small reel thick tape T 120 identified thin tape T 140 identified Large reel T 0 to T 60 identified Small reel thick tape T 130 identified thin tape T 160 to T 210 identified Small reel thick tape C cassette T 0 to T 100 C cassette not classified Small reel thick tape C cassette T 0 to T 100 C cassette being classified C cassette thick tape TC 10 to TC 20 identified Small reel thick tape T 0 to T 100 identified C cassette thin tape TC 30 to TC 40 identified C cassette thick tape thin tape TC 10 to TC 40 not
37. lt motor drive MDA IC is defective Auto recovery of the DD tilting cannot take place due to overrun The supply reel pulse is not generated in the FWD transport mode PLAY FWD SEARCH FF etc because 1 PLAY FWD or SEARCH FF is started while the tape in the inserted cassette is cut in the middle 2 A mechanical factor caused tape slack inside and outside the supply reel side of the cassette shell In this case the supply reel will not rotate until the tape slack is removed by the FWD transport so the pulse is not generated until then 3 The reel is rotating normally but the FG pulse is not generated due to a supply reel sensor failure The take up reel pulse is not generated in the REV transport mode REV SEARCH REW etc 1 REV SEARCH REW is started when the tape in the inserted cassette has been cut in the middle 2 A mechanical factor caused tape slack inside and outside the take up reel side of the cassette shell In this case the take up will not rotate until the tape slack is removed by the REV transport so the pulse will not be generated until that time 3 The reel is rotating normally but the FG pulse is not generated due to a take up reel sensor failure The power SW 5V to a reel sensor is not supplied Presupposing the presence of the control pulse output in the PLAY mode when the value obtained by mixing the two V FM output channels without regard to the A FM output has remained below a certain threshold le
38. m the FDP changes from FACTORY to CHECK OK 6 Press the VCR DVD buttojn on the unit so that the VCR lamp lights up on the unit 7 To cancel JIG RCU mode transmit 9D from the JIG RCU 5 4 5 The setting method of a region code A region code should be set after a DVD unit is replaced While a DVD unit is in a warehouse as a stock a region code of the DVD unit is not determined Only replacement of a DVD unit may cause abnormal playback of Disc Set a region code of a DVD unit in the following procedure 1 Replace a DVD unit 2 Set the unit to JIG RCU mode 3 nsert a DVD RAM disc in the unit to make the unit read the DVD RAM disc The DVD RAM disk used in this procedure is not a disk for upgrade If it is a DVD RAM disk it is good anything 4 Transmit F2 from the JIG RCU 5 REGION 1 is displayed on FDP 6 Set the unit to STANDBY mode 7 Turn the POWER switch ON 8 9 0 To cancel JIG RCU mode transmit 9D from the JIG RCU Colon is displayed on a clock on FL display Setting is completed in the procedure above 1 22 No YD006 No YD006 1 23 JVC SERVICE amp ENGINEERING COMPANY OF AMERICA DIVISION OF JVC AMERICAS CORP www jvcservice com US Only JVC CANADA INC Head office 21 Finchdene Square Scarborough Ontario M1X 1A7 416 293 1311 JVC No YD006 Printed in Japan WPC
39. ne lnc o roy Ll uam I Operation jack assembly Switch display assembly Switch display assembly CN7201 CN7001 CN7002 No YD006 1 9 SECTION 4 ADJUSTMENT 4 1 Before adjustment 4 1 1 Precaution The adjustments of this unit include the mechanism com patibility and electrical adjustments During the perfor mance of this work be sure to observe the precautions for each type of adjustment If there is a reference to a signal input method 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 Unless otherwise specified all measuring points and adjustment parts are located on the Main board 4 1 2 Required test equipments Color colour television or monitor Oscilloscope wide band dual trace triggered delayed sweep e Signal generator RF IF sweep marker Signal generator stairstep color colour bar NTSC Recording tape Digit key remote controller provided 4 1 3 Required adjustment tools Used Not used Mechanism compatibility adjustment Electrical adjustment Roller driver Jig RCU Back tension cassette gauge Alignment tape MHP Alignment tape MHP L Back tension cassette gauge PUJ48076 2 Alignment tape Alignment tape SP stairstep NTSC EP stairstep NTSC MHP MHP L 4 1 4 Color colour bar signal Color colour bar p
40. nism mal functions for some reason 2 The idler gear is meshed with the supply reel gear but incapable of winding due to too large a mechanical load abnormal tension 3 The reel rotates normally but the FG pulse is not generated due to a supply reel sensor failure Power SW5V is not supplied to the reel sensor on the tape winding side The drum could not start or the drum rotation has stopped due to too large a load on the tape because 1 The tape tension is abnormally high 2 The tape is damaged or a foreign object grease etc adheres to the tape The drum FG pulse did not reach the System controller CPU because 1 The signal circuit is disconnected in the middle 2 The FG pulse generator hall device of the drum is faulty The drum control voltage DRUM CTL V is not supplied to the MDA Power M12V is not supplied to the drum MDA The cassette cannot be ejected due to a failure in the drive mechanism of the housing When 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 temperature etc mechanism wear or failure The sensor switch for detecting the end of ejection are not functioning normally The loading motor drive voltage is lower than specified or power M12V is not supplied to the motor MDA When the user attempted to eject a cassette a foreign obj
41. oller pressure on Transition from STOP with pinch roller pressure off to FF REW Transition from STOP with pinch roller pressure off to REC P T REC etc Transition from STOP with pinch roller pressure off to cassette type detection SEARCH Short REV being executed after END sensor on during unloading Tension loosening being executed after tape loading STOP with pinch roller pressure on Tape being unloaded No YD006 1 19 3 Mechanism sensor information Common table of MN and HD Mechanism sensor informatio n Mechansim position sensor Tab broken ON Tab broken Tab broken Tab broken Tab present Tab present Tab present Tab present Tab broken Tab broken Tab broken Tab broken Tab present Tab present Tab present Tab present Tab broken 0 Tab present 1 Start sensor End sensor REC safety SW O amo olw iko o 1oo amp OolNAoO 5 L 1 I I I I I I I L I I I I I D v Sensor ON 0 sensor OFF 1 4 Mechanism mode position Common table of MN and HD Mechanism Sensor information Sensor ON 0 Sensor OFF 1 Deck operation mode Not established EJECT EJECT position 2 EJECT EJECT1 Intermodal position 5 EJECT2 EJECT2 position ULSTOP ULSTOP position UPPER Loading unloading tape UPPER ONSTOP Intermodal position ONSTOP PLAY position PLAY FWD SS Intermodal position FWD FWD Sti
42. om the side When reattaching the Front panel assembly lift the Cassette lt Note3b gt 5 Digital board assembly 3 1d 4 S5a lt Note2a gt CN7106 WR5a CN7101 CN1001 CN7109 CN1002 EI CN3103 WR7b CN2601 1d_ 2 S9a 5 S9b 2 S9c 3 L9a Be careful not to damage the connector and wire etc during the flat wire direction the door opener of the Side frame R is lowered in position pri to the switch lever of the Front panel assembly not to make it door slightly Fig 3 1a No YD006 1 7 Note 3a e When reattaching the Mechanism assembly secure the screws S3a to S3b in the order of 1 2 3 Note 3b When reattaching the Mechanism assembly be sure to align the phase of the Rotary encoder on the Main board assembly When reattaching the Mechanism assembly set the Mecha nism assembling mode See MECHANISM ASSEMBLY SERVICE MANUAL No 86700 When reattaching the Mechanism assembly to the Main board assembly take care not to damage the sensors and switch on the Main board assembly Note 3c Whenreattaching the Drum assembly secure the screws S3c to S3e in the order of c d e S3d Mechanism assembly assembly Note 3c NOTE Attach the Drum assembly appropriately since the installation state of the Drum assembly influences the FM WAVEFORM LINEARITY greatly Fig 3 1b e When handling the drum assembly alone hold it by the motor or shaft Be careful not to touch ot
43. r information details GG Capstan motor speed HH Key code JVC code II Supply reel winding diameter data higher 8 bits JJ Supply reel winding diameter data lower 8 bits KK Mechanism sensor information amp mechanism mode posi tion See EMG detail of information lt 1 gt LL Tape speed data higher 8 bits MM _ Tape speed data lower 8 bits NN Cassette tape type 2 higher 8 bits See EMG detail of information lt 2 gt OO Cassette tape type 2 lower 8 bits See EMG detail of information lt 2 gt PP General data display area YY General data display area FF Sensor information details Display Encoder data See Mechanism mode sequence Cassette tab present 1 Cassette tab broken 0 Cassette absent 1 Cassette present 0 Start sensor End sensor For HD only BB EE HHHH JJJJ LLLL MMMM AA Key code JVC code BB Deck operation mode See EMG detail information lt 1 gt CC Mechanism operation mode See EMG detail informa tion lt 1 gt DD Sensor information See sensor information details EE Capstan motor speed Search double speed FF Tracking value GGGG Cassette tape type 2 16 bits See EMG detail information lt 2 gt HHHH Supply reel winding diameter data Capstan motor speed FF REW double speed JJJJ Tape speed data lower 8 bits KKKK General data display area LLLL General data display area MMMM Gener
44. r use by the user 2 Jig RCU mode Mode for use in production and servicing When using the Jig RCU it is required to set the VCR to the Jig RCU mode the mode in which codes from the Jig RCU can be received As both of the above two modes are stored in the EE PROM it is required to set the VCR back to the User RCU mode each time that an adjustment is made or to check that the neces sary operations have been completed These modes can be set by the operations described below Note When the unit is set to JIG mode and when the unit is under JIG mode the remote control unit attached to product operates only in Remote Control Code 1 Since the unit is in Remote Control Code 3 when it is shipped and just after its batteries are changed Re mote Control Code 3 needs to be changed to Remote Control Code 1 Confirm the RCU mode when exchanged parts Since some SERVICE PARTS sets the VCR to the Jig RCU mode as initial setting Therefore please set the VCR to the user RCU mode after replacing the EEPROM User RCU mode blinked Fig 2 2a User Jig RCU mode No YD006 1 5 2 2 1 Changing Remote Control Code 1 Slide the TV CABLE DBS DVD switch to DVD 2 Press the numeric button 1 of the remote control unit while pressing the SET UP button of the remote control unit Then press the ENTER button and then release the SET UP button 3 Press the POWER button on the unit to turn off the unit 4 Press the
45. ray comes out slightly Take out the disc tray manually See Fig 5 2a No YD006 1 15 disk tray Fig 5 2a 5 3 Emergency display function VHS SECTION This unit saves details of the last two emergencies as the EMG history and allows the status of the VCR and the mechanism of each emergency to be shown both on the display and as OSD in formation When using the emergency function it is required to set the VCR to the Jig RCU mode Jig RCU Data transmitting method Depress the 2 3 button after the data code is set CD 43 00 INITIAL MODE CUSTOM CODE 43 A CODE T DATA CODE Fig 5 3a Jig RCU PTU94023B 5 3 1 Displaying the EMG information The EMG detail of information can be displayed by transmitting the code 59 from the Jig RCU Note The EMG detail information lt 1 gt lt 2 gt show the informa tion on the latest EMG It becomes when there is no latest EMG record Normal display EMG content display Latest See 5 3 4 m C 4 EMG content display Previous gt See 5 3 4 EMG detail information 1 See 5 3 5 Deck operation mode EMG detail information 1 Mechanism operation mode EMG detail information 1 gt See 5 3 5 Mechanism sensor information and Mechanism mode position EMG detail information 2 See 5 3 6 Type of the cassette tape in use lt 1 gt EMG detail information 2 See 5 3 6 W
46. ring a of the pinch roller arm assembly off the hook and detach it from the tape 4 Remove the screw a of the side frame L R 5 Hold the slack tape and cassette cover together lift the cassette tape top frame cassette holder and side frames L R together from the rear and remove them by dis en gaging the hooks a and b Screw a Cassette tape Cassette holder Side frame R Screw a Fig 5 1c 6 Take up the slack of the tape into the cassette This com pletes removal of the cassette tape 5 2 Manually removing the disk DVD CD If you cannot remove the disk which is loaded because of any electrical or mechanical failures manually remove it by taking the following steps 5 2 1 Method 1 1 AC Plug is pulled out at once and inserted again 2 It is displayed on FDP as LOADING and while it blinks pushing the OPEN CLOSE button is continued 3 After a while a tray opens About 20 seconds 4 After removed a disk press the OPEN CLOSE button again to close the tray 5 The LOADING blink display of FDP disappears and it will be in a standby mode 6 If the POWER button is pushed it will usually be operating 5 2 2 Method 2 1 Unplug the ACpower cord from the AC outlet 2 Remove the top cover and front panel assembly Refer to the disassembly procedure and perform the dis assembly of the major parts before removing 3 Pass a thin wire through a hole in the DVD unit 4 The disc t
47. t the center position 2 Press channel to adjust the tracking manually 4 1 7 EVR Adjustment Some of the electrical adjustments require the adjustment per formed by the EVR system The main unit have EEPROMSs for storing the EVR adjustment data and user setups Notes In the EVR adjustment mode the value is varied with the channel buttons The adjusted data is stored when the setting mode changes from PB to STOP when the tape speed is changed etc Take care to identify the current mode of each adjustment item when making an adjustment e When changing the address setting in the EVR adjust ment mode use the Jig RCU or the remote controller having numeric keypad with which a numeric code can be directly input The remote control code of the Jig RCU corresponds to each of the digit keys on the remote controller as fol lows Digi key 0 12 3 4 5 6 71 8 9 Code 20 21 22 23 24 25 26 27 28 29 TENSION ARM As the counter indication and remaining tape indication are not displayed FDP during the EVR adjustment mode check them on the TV monitor screen When performing the EVR adjustment confirm that the FDP indication is changed to the EVR mode 4 2 Mechanism compatibility adjustment VHS SECTION Notes e Although compatibility adjustment is very important it is not necessary to perform this as part of the normal servicing work It will be required when you have re Fig 4 2
48. the adjusted data is memorized Fig 4 3c EE Y level 4 3 2 3 EE COMPONENT PB CB level Internal color bar Mode EE Equipment Oscilloscope COMPONENT PB CB terminal EVR mode EVR address Jig code 95 ADJUSTO6 Jig code 26 Jig code 18 or 19 Channel Jig code 3C Specified value 0 70 20 Vp p terminated Adjustment tool 1 Observe the CB OUT waveform at the measuring point D 2 Set the VCR to the EVR mode by transmitting the code F1 from the Jig RCU 3 Set the EVR address to F2 by transmitting the code F3 from the Jig RCU 4 Transmit the code F4 from the Jig RCU to adjust so that the CB level of the CB OUT waveform becomes the speci fied value G 5 Release the EVR mode of the VCR by transmitting the code F5 from the Jig RCU again When the EVR mode Jig RCU PTU94023B is released the adjusted data is memorized 1 14 No YD006 PB CB level Y Fig 4 3d EE component PB CB level 4 3 3 Syscon circuit Notes When perform this adjustment remove the Mechanism assembly 4 3 3 1 Timer clock Signal No signal Mode EE Equipment Frequency counter Measuring point IC3001 pin 61 IC3001 pin 24 C3026 and Adjustment part C3025 TIMER CLOCK Specified value 1024 008 x 0 001 Hz 976 5549 x 0 0010 usec 1 Connect the frequency counter to the measuring point D
49. the mode transition during a tape loading operation 2 The mechanism overruns during the tape loading operation because the SYSCON cannot recognize SO DO NL ET S 0 Tem 3 the mechanism mode normally This problem is due to a cause such as a rotary encoder failure Power is not supplied to the loading MDA M12V Vcc Vref ICP are disconnected in the middle The mechanism is locked in the middle of mode transition Without an eject signal being sent from the SYSCON unloading is attempted i e Ejection is attempted while the tape is still inside the mechanism because the SYSCON cannot recognize the mechanism mode normally This is due to a cause such as a rotary encoder failure Mechanism position UPPER Power is not supplied to the loading MDA M12V Vcc Vref ICP are disconnected in the middle The take up reel pulse is not generated in the FWD transport modes PLAY FWD SEARCH FF etc because 1 The idler gear is not meshed with the take up reel gear because the mechanism mal functions for some reason 2 The idler gear is meshed with the take up reel gear but incapable of winding due to too large mechanical load abnormal tension 3 The reel is rotating normally but an FG pulse is not generated due to the take up reel sensor failure The supply reel pulse is not generated in the REV transport modes REV SEARCH REW etc because 1 The idler gear is not meshed with the supply reel gear because the mecha
50. tion 4 Identification of part to be removed unhooked unlocked released unplugged unclamped or unsoldered P Spring W Washer S Screw L Locking tab SD Solder CN WR Remove the wire WR from the connector CN Note The bracketed WR of the connector symbol are assigned nos in priority order and do not corre spond to those on the spare parts list 5 Adjustment information for installation 3 1 3 Disassembly procedure arie Patame RS Point Note i Topcover 34d 6 S1a Jo Front panel assembly 3 L2a 5 L2b lt Note2a gt Operation jack board assembly CN3104 WR2a lt Note2b gt Switch display board assembly CN3102 WR2b Mechanism assembly CN2001 WR3a 3 S3a S3b CN WR3b S3c S3d S3e Drum assembly Cleaner assembl 4 DVD unit 3 1d 4 S4a 4 S4b Bracket WR4a WR4b lt Note2a gt lt Note2a gt lt Note3a gt lt Note3c gt 6 Jack board assembly 3 1d Ad S7a CN7104 WR7a WR7c CN7107 WR7d Regulator board assembly 3 1d 4 S8a lt Note2a gt CN5301 WR8a CN5302 WR8b 9 2 a 3 1d 3 S10a Note 2a connection and disconnection e When connecting the flat wire to the connector be careful with Note 2b When reattaching the Front panel assembly make sure that or to the reinstallation When reattaching the Front panel assembly pay careful attention touch the switch knob of the Main board assembly fr
51. tween the workbench and the board assembly For the disassembly procedure of the major parts and details of the precautions to be taken see Removing the major parts If there are wire connections from the Main board and Mechanism assemblies to the other major parts be sure to remove them including wires connected to the major parts first before performing step 2 e When carrying out diagnosis and repair of the Main board assembly in the Service position be sure to ground both the Main board and Mechanism assem blies If they are improperly grounded there may be noise on the playback picture or FDP counter display may move even when the mechanism is kept in an inop erative status In order to diagnose the playback or recording of the cassette tape set the Mechanism assembly to the re quired mode before placing it upside down If the mech anism mode is changed including ejection while it is in an upside down position the tape inside may be dam aged For some models the mechanism and board assem blies are attached by connectors only When carrying out a diagnosis or repair of the boards in the Service position make sure that the connectors are not dis connected Main board assy Regulator board assy Switch display board assy Operation jack board assy Fig 2 1a 2 2 Jig RCU mode This unit uses the following two modes for receiving remote con trol codes 1 User RCU mode Ordinary mode fo
52. vel for more than 10 seconds E U1 is identified and recorded in the emergency history During the period in which the head clog is detected the FDP shows U 01 and the OSD repeats the 3 seconds of warning display and the 7 seconds of noise picture display alternately EMG code E C1 or E U1 FDP U 01 OSD Try cleaning tape or Use cleaning cassette The head clog warning is reset when the above mentioned threshold has been exceeded for more than 2 seconds or the mode is changed to another mode than PLAY 5 3 5 EMG detail information 1 The status electrical operation mode of the VCR and the status mechanism operation mode sensor information of the mecha nism in the latest EMG can be confirmed based on the figure in EMG detail information 1 FDP OSD display 1 2 34 1 Deck operation mode at the moment of EMG 2 Mechanism operation mode at the moment of EMG 3 Mechanism sensor information at the moment of EMG 4 Mechanism mode position at the moment of EMG Note For EMG detailed information 1 the content of the code that is shown on the display or OSD differs de pending on the parts number of the system control mi croprocessor IC3001 of the VCR The system control microprocessor parts number starts with two letters re fer these to the corresponding table 1 Deck operation mode Common table of MN and HD Display HD Deck operation mode Mechan
53. x 1 hour SP Approx 2 hours LP Approx 4 hours EP Approx 6 hours FR Approx 1 hour 8 hours Y 0 8 1 2 Vp p 75 Q C 0 2 0 4 Vp p 75 Q m i Audio input 8 dB 50 kQ pin jack Corresponding to mono left Audio output 8 dB 1 kQ pin jack Component video output Y 1 0 Vp p 75 Q CB CR PB PR 0 7 Vp p 75 Q Corresponding to copy protection Digital audio output Optical 18 dBm 660 nm Coaxial 0 7 Vp p 75 Q Corresponding to Dolby Digital and DTS Digital Surround Bit stream Selectable in digital audio output setting menu Signal system E EP Frequency range 70 Hz to 10 000 Hz Normal audio 20 Hz to 20 000 Hz Hi Fi audio nput Output Provided accessories RF cable X 1 Infrared remote control unit AA battery RF cable x 3 Antenna splitter Infrared remote control x2 unit AA battery X 2 e Specifications shown are for SP mode unless otherwise specified E amp O E Design and specifications subject to change without notice VCR Plus C and PlusCode are registered trademarks of Gemstar Development Corporation e The VCR Plus system is manufactured under license from Gemstar Development Corporation DSS is an official trademark of DIRECTV Inc a unit of GM Hughes Electronics DISH Network is a trademark of Echostar Communications Corporation e Manufactured under license from Dolby Laboratories Dolby and the double D symbol are trademarks of Dolby Laboratories e DTS

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