Home

JVC KV-V8 User's Manual

1. mm Level drop at the guide roller supply side Cc D sa Level drop at the guide roller take up side Proper waveform variation Always flat gt DD oo Improper waveform variation Higher Lower PA ig j gt Improper Proper miaju an PO def b Sige pole Fig 2 5 1d 2 5 2 Height and tilt of the A C head Note e Set a temporary level of the height
2. MN M3 HD eck operation mode 00 _ Mechanism being initialized 01 00 STOP with pinch roller pressure off or tape present with P OFF 02 01 STOP with pinch roller pressure on 03 _ POWER OFF as a result of EMG 04 04 PLAY 0c OE REC 10 11 Cassette ejected 20 22 FF 21 Tape fully loaded START sensor ON short FF 22 Cassette identification FWD SEARCH before transition to FF SP x7 speed 24 26 FWD SEARCH variable speed including x2 speed 2c 2E INSERT REC 40 43 REW 42 Cassette identification REV SEARCH before transition to REW SP x7 speed 44 47 REV SEARCH variable speed 4C 4C AUDIO DUB 6C 6E INSERT REC VIDEO AUDIO 84 84 FWD STILL SLOW 85 85 REV STILL SLOW 8C 8F REC PAUSE 8D _ Back spacing 8E _ Forward spacing FWD transport mode with BEST function AC AF INSERT REC PAUSE NSERT REC back spacing CC CD AUDIO DUB PAUSE cD AUDIO DUB back spacing EC EF INSERT REC VIDEO AUDIO PAUSE NSERT REC VIDEO AUDIO back spacing 2 Mechanism operation mode Common table of MN and M3 Display MN M3 Mechanism operation mode 00 00 Command standby Status without executing command 02 02 POWER OFF by EMG occurrence 04 04 Moving to the adjacent position in the LOAD directio
3. 00 STOP with pinch roller pressure off 01 STOP with pinch roller pressure on 02 U L STOP or tape being loaded 04 PLAY 05 PLAY x1 speed playback using JOG OE REC 11__ Cassette ejected 22 FF 26 FWD SEARCH variable speed including x2 speed 2E INSERT REC 43 REW 47_ REV SEARCH 4C AUDIO DUB 6E_ INSERT REC VIDEO AUDIO 84 FWD STILL SLOW 85 REV STILL SLOW 8F_ REC PAUSE AF _ INSERT REC PAUSE C7_ REV SEARCH x1 speed reverse playback using JOG CD AUDIO DUB PAUSE EF INSERT REC VIDEO AUDIO PAUSE FO Mechanism being initialized Fi POWER OFF as a result of EMG F2_ Cassette being inserted F3 Cassette being ejected F4 Transition from STOP with pinch roller pressure on to STOP with pinch roller pressure off F5 Transition from STOP with pinch roller pressure on to PLAY F6 Transition from STOP with pinch roller pressure on to REC F7_ Cassette type detection SEARCH before FF REW is being executed F8 Tape being unloaded F9 Transition from STOP with pinch roller pressure off to STOP with pinch roller pressure on FA _ Transition from STOP with pinch roller pressure off to FF REW FB Transition from STOP with pinch roller pressure off to REC P T REC etc FC Transition from STOP with pinch roller pres
4. 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 re ferred 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 meas uring instruments as described in the following electrical ad justment procedures After this proceed to the repair replace ment and or adjustment If the required measuring instru ments are not available in the field do not change the adjust ment parts variable resistor etc carelessly 3 1 1 Required test equipments e Color colour television or monitor e Oscilloscope wide band dual trace triggered delayed sweep e Digit key remote controller provided 3 1 2 Required adjustment tools Jig RCU Alignment tape PTU94023B SP stairstep NTSC MHP Alignment tape EP stairstep NTSC MHP L Alignment tape Alignment tape SP stairstep PAL LP stairstep PAL MHPE MHPE L Alignment tape SP color colour bar NTSC MH e Unless otherwise specified all measuring points and adjustment parts are located on the Main board e When checking the operation or performing adjust ments to the VCP main unit it is necessary to connect the power cable Car Cable to the VCP main unit so that DC power is supplied Also when using the re mote control unit it
5. 1 VHS Cassette insertion Tab broken ON OFF 2 VHS Cassette insertion Tab broken OFF ON IRo 3 VHS Cassette insertion Tab broken OFF OFF 5 Cassette tape type lt l 4 VHS Cassette insertion Tab present ON ON Display Cassette tape type lt 1 gt 5 VHS Cassette insertion Tab present ON OFF 00 Cassette type not identified 6 VHS Cassette insertion Tab present OFF ON 16 Large reel small reel T 0 to T 15 T 130 to T 210 not classified z VHS __ Cassette insertion Tab present ORK OEE 82 Small reel thick tape T 120 identified thin tape T 140 identified 8 S VHS Cassette ejection Tab broken ON ON 84 Large reel T 0 to T 60 identified 9 S VHS Cassette ejection Tab broken ON OFF 92 Small reel thick tape T 130 identified thin tape T 160 to T 210 identified A S VHS Cassette ejection Tab broken OFF ON 93 Small reel thick tape C cassette T 0 to T 100 C cassette not classified B S VHS Cassette ejection Tab broken OFF OFF C3 Small reel thick tape C cassette T 0 to T 100 C cassette being classified C S VHS Cassette ejection Tab present ON ON D3 Small reel thick tape C cassette T 0 to T 100 C cassette being classified D S VHS Cassette ejection Tab present ON OFF E1 C cassette thick tape TC 10 to TC 20 identified E S VHS Cassette ejection Tab present OFF ON E2 Small reel thick tape T 0 to T 100 identified F S VHS Cassette ejection Tab present OFF OFF E9 C
6. 19 1D Small reel thick tape T 100 1D 21 Small reel thick tape T 120 DF 240 1E 1F Small reel thin tape T 140 1F 23 Small reel thick tape T 130 21 23 Small reel thin tape T 160 21 23 Small reel thin tape T 168 22 24 Small reel thick tape DF 300 22 24 Small reel thin tape T 180 DF 360 22 24 Small reel thin tape T 210 DF 420 22 23 Large reel T 5 23 24 Large reel T 10 25 26 Large reel T 20 27 29 Large reel T 30 29 2B Large reel T 40 2D 2F Large reel T 60 Note The values of cassette tape type lt 2 gt in the above table are typical values with representative cassette tapes SECTION 2 MECHANISM ADJUSTMENT 2 1 Before starting repair and adjustment 2 1 1 Precautions 1 Unplug the power cord plug of the VCR before using your soldering iron 2 Take care not to cause any damage to the conductor wires when plugging and unplugging the connectors 3 Do not randomly handle the parts without identifying where the trouble is 4 Exercise enough care not to damage the lugs etc dur ing the repair work 5 Install the cassette housing assembly only when the mechanism is in the Mechanism assembling mode po sition See 2 2 2 6 When reattaching the front panel assembly make sure that the door opener of the cassette housing assembly is lowered in position prior to the reinstallation See SEC TION 1 DISASSEMBLY 7 When
7. Adjustment part F Specified value G Adjustment tool H 1 Play back the alignment tape A 2 Apply the external trigger signal to D FF E to observe the V PB FM waveform at the measuring point D 3 Confirm that the automatic tracking operation is com pleted 4 Set the VCR to the Auto adjust mode by transmitting the code F twice 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 A C head phase X value again 2 5 5 Tension pole position Signal A Back tension cassette gauge PUJ48076 2 Mode B e PB Adjustment part F e Adjust pin Mechansim assembly Specified value G 29 46 gfecm 2 84 4 5 x 103 Nm 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 1 Set the VCR to the mechanism service mode See 1 5 Mechanism service mode 2 Set the VCR to the play back mode and turn the ad just pin using the flat blade screwdriver etc by pay ing attention not to come into contact with the 2 5 mm dia pole See Fig 2 5 5a Tension arm assembly i Fig 2 5 5a SECTION 3 ELECTRICAL ADJUSTMENT 3 1 Precaution
8. EMG detail information lt 2 gt Notes The EMG detail information lt 1 gt lt 2 gt show the information on the latest EMG It becomes when there is no latest EMG record e When using the Jig RCU set its custom code to match the custom code of the VCR Jig RCU Data transmitting method Depress the B button after the data code is set K 00 43 00 INITIAL MODE CUSTOM CODE 43 A CODE 53 B CODE DATA CODE Fig 1 6a Jig RCU PTU94023B 1 6 1 Displaying the EMG information 1 Transmit the code 59 from the Jig RCU The FDP shows the EMG content in the form of E Example 1 E 01 03 t Previous EMG Latest EMG Example 2 E No EMG record Notes e For the OSD display model all EMG information are showed by transmitting first code from the Jig RCU For the EMG content see 1 6 3 EMG content descrip tion 2 Transmit the code 59 from the Jig RCU again The FDP shows the EMG detail information lt 1 gt 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 Note e For the EMG detail information lt 1 gt see 1 6 4 EMG de tail information lt 1 gt 3 Transmit the code 59 from th
9. AAA ASSEMBLY EJECT BECP STILL FWD STILL REV SPACE MEGHAT F FF Table 2 4a 2 5 Compatibility adjustment Notes e Although compatibility adjustment is very important it is not necessary to perform this as part of the nor mal servicing work It will be required when you have replaced the audio control head drum assembly or any part of the tape transport system e To avoid any damage to the alignment tape while per forming the compatibility adjustment get a separate cassette tape for recording and play back ready to be used for checking the initial tape running behavior e Unless otherwise specified all measuring points and adjustment parts are located on the Main board e When using the Jig RCU set its custom code to match the custom code of the VCR Jig RCU Data transmitting method Depress the 3 B button after the data code is set K 00 43 00 INITIAL MODE CUSTOM CODE 43 A CODE 53 B CODE DATA CODE Fig 2 5a Jig RCU PTU94023B 2 5 1 FM waveform linearity KV V8E Signal A1 Alignment tape SP stairstep PAL MHPE A2 9 Alignment tape LP stairstep PAL MHPE L KV V8J 1 Alignment tape SP stairstep NTSC MHP 2 Alignment tape EP stairstep NTSC MHP L B PB Mode Equipment Oscilloscope TP106 PB FM e TP111 D FF e Guide roller Mechanism assembly
10. C head positioning tool to bring the A C head to a position around where the waveform reaches its maximum for the first time Then tighten the screws 4 and 5 Note e After adjusting always perform the confirmation and re adjustment of the item 2 5 4 A C head positioning d A C head To the drum Fig 2 5 3a Alignment tape SP stairstep played with the SP head Alignment tape EP LP stairstep played with the EP LP head gt A DN i FN i Waveform output c aen X value adjustment point Drum side Control head position Capstan side gt gt Maximum Fig 2 5 3b 2 5 4 Standard tracking preset KV V8E e Alignment tape LP stairstep PAL MHPE L KV V8J A e Alignment tape EP stairstep NTSC MHP L Mode B e PB Auto adjust Equipment C Signal A Oscilloscope TP106 PB FM e TP111 D FF e Jig RCU Code 50 e STOP mode Maximum V PB FM waveform e Jig RCU PTU94023B Measuring point D External trigger E
11. TP4001 TP2253 AFM CTL P TP111 e TP106 D FF P PB FM SW board J CN3006 CP5001 CP5002 Front board assembly m NIS ro i TP7001 TP7002 MECHATEST GND Fig 1 4 1a 1 5 Mechanism service mode This model has a unique function to enter the mechanism into every operation mode without loading of any cassette tape This function is called the Mechanism service mode 1 5 1 How to set the Mechanism service mode 1 Unplug the power cord plug from the power outlet 2 Remove the Front panel assembly and Cassette hous ing assembly Take care not to pull the flat wire 3 Connect TPGND and TP7001 TEST on the Front board assembly with a jump wire 4 Insert the power cord plug into the power outlet 5 Turn on the power When the loading has completed the mechanism enters the desired mode 1 6 Emergency display function This unit has a function for storing the history of the past two emergencies EMG and displaying them on each FDP or OSD With the status of the VCR and mechanism at the moment an emergency occurred can also be confirmed FDP display model FDP display gt 0 00 00 Normal display E EMG content display E Latest Previous 1 7 34 EMG detail information lt 1 gt 5 6 7 EMG detail information lt 2 gt OSD display model OSD display m EMG content display E Latest Previous EMG detail information lt 1 gt
12. When installing the Cassette housing assembly make sure that the Control cam and the Main deck alignment holes are aligned if they are not rotate the Loading motor belt to the front align the holes e When installing the Cassette housing assembly be careful not to dam age the parts of the Main board and Mechanism assemblies lt Note 5a gt e When removing the Mechanism assembly only unhook the two spacers connecting it with the Main board assembly with pliers from the back side of the Main board assembly first and then remove the Mecha nism assembly e When reattaching the Mechanism assembly to the Main board as sembly take care not to damage the sensors on the Main board as sembly 1 1 1 Top cover S3a 3 Cassette gt housing assembly Switch lever 2 Front panel assembly REC safety switch lt Note 3a gt Fig D1 Fig D3a g S2a Stay ae e S2a 2 SW board assembly Loading motor belt Rear side n Pinch plate f Detail G SW board Chassis Main board Door opener a lt Note 2b gt k Hole align with hole in CL J deck U 0 H a lt Note 3a gt Control cam 1 2 Fig D2 Fig D3b Note When
13. cassette thin tape TC 30 to TC 40 identified F1 C cassette thick tape thin tape TC 10 to TC 40 not classified Notes e Cassette tape type lt 1 gt 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 identi fication the cassette tape type may not be able to be identified If other value than those listed in the above table is displayed the cassette tape type is not identified 6 Cassette tape winding position The cassette tape winding position at the moment of EMG is displayed by dividing the entire tape from the beginning to the end in 22 sections using a hex number from 00 to 15 00 End of winding 15 Beginning of winding FF Tape position not identified 7 Cassette tape type lt 2 gt Winding area Display Cassette tape type lt 2 gt 00 Cassette type not identified 07 Small reel thick tape T 5 08 OE C cassette thick tape TC 10 09 15 C cassette thick tape TC 20P OA OB Small reel thick tape T 20 OA 16 C cassette thin tape TC 30 OA 16 C cassette thin tape TC 40 OD OF 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 90 DF 180
14. e Flat V PB FM waveform e Hexagonal wrench 1 25 mm e Roller driver PTU94002 External trigger m Adjustment part T lt Specified value Measuring point D Adjustment tool 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 Set the VCR to the manual tracking mode 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 Per form the following adjustments when required See Fig 2 5 1a 5 Using a hexagonal wrench gently loosen the set screw at the bottom of the pole base assembly Be careful not to loosen it too much See Fig 2 5 1b 6 Reduce the V PB FM waveform by the tracking opera tion 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 2 5 1c 2 12 7 Make sure that the V PB FM waveform varies in parallel and linearly with the tracking operation again When re quired perform fine adjustment of the guide roller of the pole base assembly supply or take
15. head base Mechanism assembly External trigger E Adjustment part F e Maximum V PB FM waveform A C head positioning tool PTU94010 Specified value G Adjustment tool H 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 Set the VCR to the manual tracking mode 4 Loosen the screws 4 and 5 then set the A C head positioning tool to the projected part in front of the A C head See Fig 2 5 3a 5 Turn the A C head positioning tool fully toward the cap stan Then turn it back gradually toward the drum and stop on the first peak point position of the V PB FM wave form output level Then tighten the screws 4 and 5 6 Perform the tracking operation and make sure that the V PB FM waveform is at its maximum If it is not at maximum loosen the screws 4 and 5 and turn the A C head positioning tool to bring the A C head to a position around where the waveform reaches its maximum for the first time Then tighten the screws 4 and 5 Perform adjustment steps 7 to 10 only for 2 Head models equipped with LP mode 7 Then play back the alignment tape A2 8 Set the VCR to the manual tracking mode 9 Perform the tracking operation and make sure that the V PB FM waveform is at its maximum 10 If it is not at maximum loosen the screws 4 and 5 and turn the A
16. of the A C head in advance to make the adjustment easier after the A C head has been replaced See Fig 2 2 4c KV V8E Signal A e Alignment tape SP stairstep PAL MHPE KV V8J A e Alignment tape SP stairstep NTSC MHP Mode B PB Equipment C Oscilloscope Measuring point D1 AUDIO OUT terminal D2 TP4001 CTL P External trigger E e TP111 D FF Adjustment part F e A C head Mechanism assembly Specified value G Maximum waveform 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 measuring points D1 and D2 in the ALT mode 3 Set the VCR to the manual tracking mode 4 Adjust the AUDIO OUT waveform and Control pulse waveform by turning the screws 1 2 and 3 little by little until both waveforms reach maximum The screw 1 and 3 are for adjustment of tilt and the screw 2 for azi muth Guide pole T U 1 gt 3 Guide pole T U bottom flange TAR He Audio out A gal CTL P Y Y y f Fig 2 5 2a 2 5 3 A C head phase X value KV V8E Signal A Alignment tape SP stairstep PAL MHPE KV V8J A e Alignment tape SP stairstep NTSC MHP Mode B e PB Equipment C Oscilloscope Measuring point D e TP106 PB FM e TP111 D FF e A C
17. or rent at 4 C a i d isk Assembly TU Slide Plate Reel Disk Assembly SUP Pole Base Assembly TU Tension Band oan D oO D iw Fig 2 1 5a Mechanism assembly top side Belt Capstan Rotary Encoder Fig 2 1 5b Mechanism assembly bottom side 2 Cleaning Regular cleaning of the transport system parts is desirable but practically impossible So make it a rule to carry out clean ing 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 disap pear resulting in possible tape damage 1 When cleaning the upper drum especially the video head soak a piece of closely woven cloth or Kimu wipe with alcohol and while holding the cloth onto the upper drum by the fingers turn the upper drum counterclockwise Note e Absolutely avoid sweeping the upper drum vertically 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 peri
18. power is not turned off However note that the reel EMG is not detected in the SLOW STILL mode CONDO ARO N gt The supply reel pulse is not generated in the FWD transport mode PLAY FWD SEARCH IFF etc because 1 PLAY FWD or SEARCH FF is started while the tape in the inserted cas sette 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 gonerated until then 3 The FG pulse output from the supply reel sensor is absent 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 supply reel 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 FG pulse output from the take up reel sensor is absent 3 The power to a reel sensor is not supplied EC1 or EU1 Head clog warning 1 6 Presupposin 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 level for m
19. the rotor assembly and stator assembly according to Fig 2 2 17a and 2 2 18a 8 When installation is complete clean the upper drum as sembly and lower drum assembly and carry out the fol lowing adjustments e PB switching point adjustment e Slow tracking adjustment e Compatibility adjustment Be sure to check for compat ibility for the EP or LP mode Lower drum assembly __ Upper drum assembly Fig 2 2 19b Collar assembly Upper drum assembly Fig 2 2 19c Press Collar Ss Tighten assembly Fig 2 2 19d 2 3 Installation of major parts Mechanism phase align ment 2 3 1 Before assembly The mechanism of this model is closely related with the ro tary encoder and the system control circuitry The connec tion between the rotary encoder and control cam determines the movement of all mechanical parts including the slide plate loading arm assembly control plate and brake If these parts are not installed in the correct positions operations such as loading and unloading will not be possible Installation of the major parts mechanism phase alignment should be performed exclusively in the mechanism assem bling mode as with the operations in the previous sections 2 3 2 Loading arm assemblies supply take up 1 Attach the loading arm assembly supply and loading arm assembly take up so that the alignm
20. up side 8 Unload the cassette tape once play back the alignment tape A1 again and confirm the V PB FM waveform 9 After adjustment confirm that the tape wrinkling does not occur at the roller upper or lower limits See Fig 2 5 1d 10 After completing adjustment tighten the set screw at the bottom of the pole base assembly Be careful not to tighten it too much See Fig 2 5 1b Perform adjustment step 11 only for the models equipped with SP mode and EP or LP mode 11 Repeat steps 1 to 10 by using the alignment tape A2 bi gt Max level Min level Proper waveform variation i Improper waveform variation Fig 2 5 1a Roller driver Fig 2 5 1b
21. KV V8 JVC SERVICE MANUAL MOBILE VIDEO CASSETTE PLAYER KV V8 alia a Comparison table Fem kvva kvva Area Suffix Signal system PAL NTSC Area Continental Europe U S A E Continental Europe North America Contents E Specifications E CAUTION E Instructions 1 DISASSEMBLY 3 ELECTRICAL ADJUSTMENT 1 1 Disassembly flow chart ccc cece eee e eee eens 1 1 Bil PROCAUTION sits sce a Sie Shae ere nies Site wedge ake ETTE 3 1 1 2 How to read the disassembly and assembly 1 1 3 2 SOP CICUIE oiee Go Mtlgt boca dist tee dec teens 3 1 1 3 Disassembly assembly method eeee eee eee ees 1 1 1 4 Service position 0 A aaran eee e eee aai Ba aistii 1 4 5 PARTS LIST 1 5 Mechanism service mode 0eeeeeeeeeeeeeee eens 1 4 5 1 PACKING AND ACCESSORY ASSEMBLY lt M1 gt 5 1 1 6 Emergency display function 2 cece eee eects 1 5 5 2 FINAL ASSEMBLY lt M2 gt c cece eee eee ee eens 5 2 5 3 MECHANISM ASSEMBLY lt M4 gt cee eee e eee 5 4 2 MECHANISM ADJUSTMENT 5 4 ELECTRICAL PARTS LIST 0 cee e eee eee etree ees 5 6 2 1 Before starting repair and adjustment 00 2 1 2 2 Replacement of major parts c cece eee eee eee 2 4 2 3 Installation of major parts Mechanism phase alignment 2 9 2 4 Mechanism tim
22. When the user attempted to eject a cassette a foreign object or perhaps the user s hand was caught in the opening of the housing E06 Capstan FG EMG 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 STILL SLOW FF REW modes 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 e capstan control voltage CAPSTAN CTL V is not supplied to the MDA Power is not supplied to the capstan MDA E07 SW Power Short Circuit EMG 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 1 The SW5V ower supply circuit is shorted with GND The SW 12 power supply circuit is shorted with GND E08 DD Initialized Absolute osition Sensor EMG When DD tilting does not complete in 4 seconds E 08 is ig
23. ay 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 Trigger point V sync m Switching point al V rate Fig 3 2 1a Switching point 3 1 3 2 2 Slow tracking preset Signal A1 Color colour bar or stairstep signal KV V8E A2 Alignment tape MH 2 or MHPE A3 Alignment tape MH 2L or MHPE L KV V8J A2 Alignment tape MH 1 or MHP A3 Alignment tape MH 1L or MHP L Measuring point D e TV Monitor Adjustment part F e Jig RCU Code 71 or 72 Specified value G e Minimum noise H Adjustment tool e Jig RCU PTU94023B 1 Play back the signal A1 of the alignment tape A2 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 no
24. checking the operation or performing adjustments to the VCP main unit it is necessary to connect the power cable Car Cable to the VCP main unit so that DC power is supplied Also when using the remote control unit it is required to connect the IR receiver by using either the provided or optional accessories 2 1 2 Checking for proper mechanical operations Enter the mechanism service mode when you want to oper ate the mechanism when no cassette is loaded See 1 5 Mechanism service mode 2 1 3 Manually removing the cassette tape 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 cord plug from the power outlet 2 Refer to the disassembly procedure and perform the dis assembly of the major parts before removing the Cas sette housing assembly 3 Unload the pole base assembly by manually turning the loading motor of the mechanism assembly toward the front In doing so hold the tape by the hand to keep the slack away from any grease See Fig 2 1 3a 4 Bring the pole base assembly and guide arm assembly to a pause when it reaches the position where it is hid den behind the cassette tape 5 Remove the cassette housing assembly by holding both the slackened tape and the cassette lid 6 Take up the slack of the tape into the cassette This com pletes removal of the cassette tape Note e For the disass
25. do not use the lug wire Refer to the parts list for these models e When tightening the screw B place the caulked part of the lug terminal near to the shaft of the drum and then tighten it e After installation be sure to perform the switching point adjustment according to the electrical adjustment procedure Drum shaft A Lug wire Screw A Screw B Lug wire ni Stator Screw A assembly ii s gt cus Flat cable Take care not to mix up the 6 Spring polar faces when installing Fig 2 2 17a 2 2 18 Rotor assembly 1 How to remove 1 Remove the stator assembly 2 Remove the two screws B and remove the rotor assem bly 2 How to install 1 Match the phases of the upper drum assembly and the rotor assembly as indicated in Fig 2 2 18a 2 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 18a Note When installing the rotor assembly note that a normal picture cannot be obtained without ensuring the phase matching as mentioned below Screws B Hole a Screw holes Upper drum eee assembly X The hole is not in line but is offset toward the right Rotor assembly Fig 2 2 18a Hole b 2 2 19 Upper drum assembly Notes e To replace the upper drum assembly only may not be possible with some models Fo
26. e Jig RCU once again The FDP shows the EMG detail information lt 2 gt in the form of 5 6 7 5 Type of the cassette tape in use lt 1 gt 6 Winding position of the cassette tape in use 7 Type of the cassette tape in use lt 2 gt Winding area Note e For the EMG detail information lt 2 gt see 1 6 5 EMG de tail information lt 2 gt 4 Transmit the code 59 from the Jig RCU once again to re set the display 1 6 2 Clearing the EMG history 1 Display the EMG history 2 Transmit the code 36 from the Jig RCU 3 Reset the EMG display 1 6 3 EMG content description Note EMG contents E08 E09 are for the model with Dynamic Drum DD FDP CONTENT CAUSE E01 Loading EMG When the mechanism mode cannot be changed to an other mode even when the loading motor has rotated for more than 4 seconds in the loading direction E 01 is identified and the power is turned off The mechanism is locked in the middle of mode transition The mechanism is locked at the loading end due to the encoder position reading error during mode transition Power is not supplied to the loading MDA E02 Unloading EMG When the mechanism mode cannot be changed to an other mode even when the loading motor has rotated for more than 4 seconds in the unloading direction E 02 is identified and the power is turned off The mechanism is locked in the middle of mode transition T
27. eight x depth 3 2 kg 0 C to 40 C 35 to 80 20 C to 60 C VHS format Hi Fi 4 heads helical scan VHS PAL standard VHS stereo Hi Fi audio 2 Hi Fi audio channels and 1 normal audio channel Acode A code and B code are switchable automatically in the main unit Design and specifications subject to change without notice pay attention to such burrs in the case of preforming repair of this system SECTION 1 DISASSEMBLY 1 1 Disassembly flow chart This flowchart lists the disassembling steps for the cabinet parts and P C boards in order to gain access to item s to be serviced When reassembling perform the step s in reverse order Bend route and dress the flat cables as they were originally laid 1 Top cover 2 SW board assembly Froni panel assembly 3 Cassette kousa assembly 4 Drum E 5 Mechanism assembly 6 Main pad assembly 1 2 How to read the disassembly and assembly lt Example gt PA Part Name Fig Point Note 1 Top cover D1 4 S1a S1b 3 L1a lt Note 1 gt 2 SD1a P1a CN1 WR1a Bracket 2 S1c L 2 a ef 1 2 3 4 5 1 Order of steps in Procedure When reassembling perform the step s in the reverse order These numbers are also used as the identification location No of parts Figures 2 Part name to be removed or installed 3 Fig No showing procedure or
28. embly procedure of the major parts and details of the precautions to be taken see 1 3 Disas sembly assembly method Loading motor Ue J Guide arm assembly Pole base bssembly Fig 2 1 3a 2 1 4 Jigs and tools required for adjustment Roller driver A C head positioning tool PTU94002 PTU94010 7 Torque gauge PUJ48075 2 Back tension cassette gauge Jig RCU PUJ48076 2 PTU94023B Alignment tape SP stairstep NTSC MHP Alignment tape EP stairstep NTSC MHP L Alignment tape SP stairstep PAL MHPE Alignment tape LP stairstep PAL MHPE L 2 1 5 Maintenance and inspection 1 Location of major mechanical parts Drum Assembly A C Head Stator Assembly Capstan Motor Loading Motor Guide Rail Po oo pe o e o TAN O CY EE FE Head 5 d Belt Loading Motor S O D gt Pinch Roller Arm Assembly Ja wc Tension Arm Assembly gt jh Guide Arm Assembly R 4 IG Pole Base Assembly SUP kl are f A PEL Lever Assembly p amp Q a FEO 2 H a oe iS o a ZO OAS o ol e Control Cam gt Change Lever Assembly oT Ir A SSS om a
29. enititied the tilt motor is stopped and the power is turned off The absolute value sensor is defective The soldered parts have separated The pull up resistor at the absolute 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 absolute value sensor The absolute value sensor data is not sent to the System Controller CPU A O N DD FG EMG When the DD FG pulse is not generated within 2 5 sec onds E 09 is identified the tilt motor is stopped and the power is turned off The FG sensor is defective The soldered parts have separated The ped 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 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 tilt motor drive MDA IC is defective Auto recovery of the DD tilting cannot take place due to overrun EOA Supply Reel Pulse EMG When the supply reel pulse has not been generated for more than 10 seconds in the capstan rotating mode E 0A is identified and the cassette is ejected but the
30. ent markings on their gears face each other and the holes on their arms are respectively aligned with the holes on the main deck 2 Attach the guide rail attach the pole base assemblies onto the extremities of the arms then perform the unloading operation so that the pole base assemblies come to the most forward positions Note e When attaching the pole base assemblies supply take up temporarily tighten the 3 screws other than the 2 screws on the sides of the guide rail extremities so that the parts do not slip out 3 Attach the surrounding parts of the guide rail Loading arm assembly supply To pole base To pole base assembly assembly N Correct direction J A A X y Loading arm assembly take up CP Holes align with Holes align with Bole ih deck hole in deck Correct direction Fig 2 3 2a 2 3 3 Rotary encoder change lever assembly control cam 1 To attach the rotary encoder align the triangular align ment markings and push the rotary encoder in until the claws are locked 2 To attach the change lever assembly align its holes with the holes on the mechanism assembly As the change lever assembly is projected on the rear side of the mecha nism assembly take care that the assemblies are not separated from each other 3 To attach the control cam align its holes with the holes on the mechanism assembly by p
31. he mechanism is locked at the unloading end due to the encoder posi tion reading error during mode transition Power is not supplied to the loading MDA E03 Take Up Reel Pulse EMG When the take up reel pulse has not been generated 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 However the reel EMG is not detected in STILL SLOW modes 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 2 The idler gear is meshed with the take up reel gear but incapable of wind ing due to too large mechanical load abnormal tension 3 The take up reel sensor does not output the FG pulse 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 2 The idler gear is meshed with the supply reel gear but incapable of wind ing due to too large a mechanical load abnormal tension 3 The supply reel sensor does not output the FG pulse Power is not supplied to the reel sensors E04 Drum FG EMG When the drum FG pulse has not been input for more than 3 seconds in the drum rotating mode E 04 is iden tified the pinch rollers are turned off and stopped and the power is turned off The drum could not start or the drum ro
32. her and control b racket z Gi O Control braket e holes in deck Holes align with Control plate Hole of take up lever align with hole in deck Slit washer red Fig 2 3 5a 2 4 Mechanism timing chart MODE CLOAD C NS wewo FWD SFwD SREV REV STOP FFIREW LOADING PARTS 9 w F R s FF SLIDE PLATE Omm 4mm 21 mm 24mm 26mm 32mm 34mm 37 5mm 43mm CONTROL CAM 0 30 68 160 4 183 3 198 6 244 5 259 7 286 5 328 5 LSA LAB l LSC A ee ROTARY s M LSE TY ENCODER c Zia oou ae POLE BASE ASSY lecia eS oll a PINCH ROLLER CAM ee eee UR UP DOWN DOWN PINCH ROLLER PRESS CAPSTAN FREE LOAD END TENSION ARM ASSY UNLOAD END TENSION ARM ope ON N SPRING PRELOAD OFF SUP SUP IDLER CENTER lt T TU TU IDLER UP UP DOWN DOWN GUIDE ARM T MAIN BRAKE ASSY J oN SUP OFF MAIN BRAKE ASSY ON TU OFF ON eine a fe ais a CONTACT OFF ON a BRAKE ASSY 7 Contact TU OFF so rile OR ON CAPSTAN BRAKE OFF ON C HOUSING GEAR OFF TU LEVER ee i lh AEC s REW sTOP REC MECHANISM wor usep RECP SLOW FWD SLOW REV Back RA FRIREW
33. ing Chart 6 ce cece cece ee eens 2 11 2 5 Compatibility adjustment 0 cece eee eee eee eee 2 12 No 49625 COPYRIGHT 2001 VICTOR COMPANY OF JAPAN LTD Feb 2001 Specificatios KV V8 General Power supply e Dimensions e Mass e Allowable working temperature e Allowable relative humidity e Allowable conservation temperature Video ePlayback system e Video signal Audio ePlayback system e Audio track Remote control unit Specificatios KV V8E General Power supply e Dimensions e Mass e Allowable working temperature e Allowable relative humidity e Allowable conservation temperature Video ePlayback system e Video signal Audio Playback system e Audio track Remote control unit A CAUTION Burrs formed during molding may be left over on some parts of the chassis Therefore DC12 V 11V 16V allowable Negative ground 259 mm x 94 mm x 270 mm 10 1 4 x 3 3 4 x 10 11 16 width x height x depth 3 2 kg 7 1 Ibs 0 C to 40 C 32 F to104 F 35 to 80 20 C to 60 C 4 F to 140 F VHS format Hi Fi 4 heads helical scan VHS NTSC standard VHS stereo Hi Fi audio 2 Hi Fi audio channels and 1 normal audio channel Acode A code and B code are switchable automatically in the main unit Design and specifications subject to change without notice DC12 V 11V 16V allowable Negative ground 259 mm x 94 mm x 270 mm width x h
34. installing the Drum assembly secure the screws S4a S4c in the order ofa b c 1 Not used 4 Drum assembly Inertia plate es i l WR4a Supporting S4a tape side lt Note 2a gt WR4b Pee Sas Supporting Not used tape side Cleaner assembly lt Note 2a gt lt Note 5 gt z0 Y S N 6 Main board assembly S6b S6a 5 Mechanism lt 80 gt I L _ _ Not used Fig D4 S5a TNotused WR4 i AQ WR5a p assembly CN3003 L5a Spacer lt Note5a gt Fig D5 Fig D6 1 4 Service position This unit has been designed so that the Mechanism and Main board assemblies can be removed together from the chas sis assembly Before diagnosing or servicing the circuit boards take out the major parts from the chassis assembly 1 4 1 How to set the Service position 1 Refer to the disassembly procedure and perform disas sembly of the major parts before removing the Cassette housing assembly 2 Remove the combined Cassette housing Mechanism and Main board assemblies 3 Connect the wires and connectors of the major parts that have been removed in step 1 Refer to Fig 1 4 1a 4 Place the combined Mechanism and Main board assem blies upside down 5 Insert the power cord plug into the power outlet and then proceed with the diagnostics and servicing of the board assemb
35. is required to connect the IR re ceiver by using either the provided or operational ac cessories 3 2 Servo circuit 3 2 1 Switching point External trigger E e TP111 D FF F e Jig RCU Code 5A KV V8E e 6 5 0 5 H SP stairstep PAL MHPE KV V8J G 6 5 0 5 H SP stairstep NTSC MHP lt Signal A1 Stairstep signal KV V8E A2 gt Alignment tape SP stairstep PAL MHPE KV V8J A2 Alignment tape SP stairstep NTSC MHP Mode B PB Equipment C Oscilloscope Measuring point D1 e VIDEO OUT terminal 75Q terminated D2 e TP106 PB FM Adjustment part Specified value G Alignment tape EP color colour bar NTSC MH 1L Alignment tape SP color colour bar PAL MH 2 Alignment tape LP color colour bar PAL MH 2L 3 1 3 Switch settings and standard precautions The SW settings of the VCR and the standard precautions for the electrical adjustments are as follows When using the Jig RCU set its custom code to match the custom code of the VCR Jig RCU Data transmitting method Depress the 3 3 button after the data code is set NM Ca ra CUSTOM CODE INITIAL MODE 43 A CODE 53 B CODE T DATA CODE Fig 3 1 3a Jig RCU PTU94023B Adjustment tool H Jig RCU PTU94023B 1 Pl
36. ise 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 Play back the signal A1 of the alignment tape A3 9 Repeat steps 2 to 7 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 anne 3 2 KV V8 VICTOR COMPANY OF JAPAN LIMITED MOBILE ELECTRONICS DIVISION PERSONAL amp MOBILE NETWORK BUSINESS UNIT 10 1 1Chome Ohwatari machi Maebashi city Japan Printed in Japan No 49625 QD ise
37. ke out the slit washer then remove the lever assem bly 3 Take out the 3 screws A then remove the capstan mo tor and sub deck assembly together 4 Take out the 3 screws B then remove the capstan mo tor from the sub deck assembly Note e Before removing the capstan brake assembly it is re quired to first remove the worm gear assembly and the control cam Back side Mechanism assembly Fig 2 2 7a Slit washer Sub deck Assembly Lever assembly Capstan motor Fig 2 2 7c 2 2 8 Control bracket 1 Take out the screw A and screw B 2 Remove the control bracket ape ee A O Control bracket 3 gt os ol ol L H ores ea 7G Fig 2 2 8a 2 2 9 Reel disk assembly take up 1 Take out the slit washer 2 Remove the reel disk assembly take up Slit washer Reel disk assembly take up Fig 2 2 9a Reel disk assembly take up Fig 2 2 9b 2 2 10 Control plate 1 Take out the slit washer disengage the 2 hooks while lifting the control cam side of the control plate and re move the control plate Notes e After removing the control plate be careful not to turn the main deck assembly upside down Otherwise parts such as the idle
38. ly Notes Before inserting the power cord plug into the power outlet make sure that none of the electrical parts are able to short circuit between the workbench and the board assembly e For the disassembly procadure of the major parts and details of the precautions to be taken see 1 3 Disas sembly assembly method e If there are wire connections from the Main board and Mechanism assemblies to the other major parts be sure to remove them first before performing step 2 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 in operative status e In order diagnose the playback or recording of the cas sette tape set the Mechanism assembly to the required mode before placing it upside down If the mechanism mode is changed including ejection while it is in an upside down position the tape inside may be damaged e When checking the operation or performing adjust ments to the VCP main unit it is necessary to connect the power cable Car Cable to the VCP main unit so that DC power is supplied Also when using the re mote control unit it is required to connect the IR re ceiver by using either the provided or optional acces sories 1 4 Main board assembly
39. n D REV position C Between REV and REV STILL SLOW E B REV STILL SLOW position C 7 Between REV and FWD A Between REV STILL SLOW and FWD STILL SLOW D 6 FWD FWD STILL SLOW position 9 FWD STILL SLOW position E 7 Between FWD and PLAY E 8 Between FWD STILL SLOW and PLAY F 6 7_ PLAY position Note e In the case of the HD microprocessor as the display is always 7 at any intermediate position between modes the position of transitory EMG may sometimes not be lo cated 1 6 5 EMG detail information lt 2 gt 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 lt 2 gt FDP OSD display 5 6 7 5 Type of the cassette tape in use lt 1 gt 6 Winding position of the cassette tape in use 7 Type of the cassette tape in use lt 2 gt Winding area 1 8 Mechanism sensor information stored using the remaining tape detection function of the Display MN HD M3 REC safety Start End cassette tape As a result it may not identify cassette cor S VHS SW CASS SW SW sensor sensor rectly when a special cassette tape is used or when the 0 VHS Cassette insertion Tab broken ON ON tape has variable thickness
40. n 06 06 Moving to the adjacent position in the UNLOAD direction 08 08 Cassette ejection being executed Cassette housing ejection being executed OA Mode transition to STOP with cassette ejection end 0A OC Cassette insertion being executed OC OE Tape being loaded OE 10 Tape being unloaded 10 12 Mode transition to STOP with pinch roller compression ON 12 14 Mode transition to STOP with pinch roller compression OFF 14 16 Mode transition to STOP with pinch roller compression OFF as a result of POWER OFF 16 18 Mode transition to STOP with pinch roller compression ON as a result of POWER ON 18 1A Mode transition to PLAY 1A 1C Mode transition to FWD SEARCH 1C 1E Mode transition to REC 1E 20 Mode transition to FWD STILL SLOW 20 22 Mode transition to REV STILL SLOW 22 24 Mode transition to REV SEARCH 24 26 Mode transition from FF REW to STOP 26 28 Mode transition to FF 28 2A Mode transition to REW 2A 2C 4 sec of REV as a result of END sensor going ON during loading 2C 2E Short FF REV as a result of END sensor going ON during unloading 2E 30 Mechanism position being corrected due to overrun 80 80 Mechanism in initial position Dummy command Table of HD Display Mechanism operation mode
41. odical lubrication you have only to lu bricate new parts after replacement If any oil or grease on contact parts is soiled wipe it off and newly lubricate the parts Note e 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 e Grease is not required for a replacement cassette hous ing assembly as this has been applied at the factory 4 Suggested servicing schedule for main components The following table indicates the suggested period for such service measures as cleaning lubrication and replacement In practice the indicated periods will vary widely according to environmental and usage conditions However the indi cated components should be inspected when a set is brought for service and the maintenance work performed if neces sary Also note that rubber parts may deform in time even if the set is not used Operation Hours 1000H 2000H Upper drum assembly KO O A C head XO T XO Lower drum motor assembly KO System Parts Name Pinch roller arm assembly Full erase head Tape transport Tension arm assembly Guide arm assembly Capstan motor Belt Capstan Belt Loading motor O Db gt t gt t gt t gt t Loading motor Reel disk Supply take up Clutch unit supply take up Worm gear assembly Drive Control plate Slide plate Brush KO Tension band as
42. ore than 10 seconds E C1 or E U1 is identified and recorded in the emergency history During the period in which a head clog is detected the FDP and SD repeat the 3 second warning display and 7 second 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 Table 1 6 3a 1 6 4 EMG detail information lt 1 gt The status electrical operation mode of the VCR and the sta tus mechanism operation mode sensor information of the mechanism in the latest EMG can be confirmed based on the figure in EMG detail information lt 1 gt FDP OSD display 1 2 134 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 e For EMG detailed information lt 1 gt the content of the code that is shown on the FDP or OSD differs depending on the parts number of the system control microprocessor IC3001 of the VCR The system control microprocessor parts number starts with two letters refer these to the cor responding table 1 Deck operation mode Common table of MN HD and M3 Display Bene
43. part location 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 e The bracketed WR of the connector symbol are as signed nos in priority order and do not correspond to those on the spare parts list 5 Adjustment information for installation 1 3 Disassembly assembly method Peres Part Name Mig Point Note 1 Top cover D1 2 S1a S1b 2 S1c 2 SW board assembly D2 2 S2a WR2a stay lt Note 2a gt Front panel assembly 4 L2a 3 L2b lt Note 2b gt CN3006 WR2b 3 Cassette housing D8a 2 S3a 2 L3a lt Note 3a gt assembly D3b 4 Drum assembly D4 CN1 WR4a lt Note 2a gt CN1 WR4b S4a S4b S4c 5 Mechanism assembly D5 CN1 WR5a lt Note 2a gt CN3003 WR5b lt Note 5a gt CN3005 WR85c 2 S5a S5b 2 L5a 6 Main board assembly D6 S6a S6b lt Note 2a gt e Be careful not to damage the connector and wire etc during connec tion and disconnection When connecting the wire to the connector be careful with the wire direction lt Note 2b gt e When reattaching the Front panel assembly make sure that the door opener a of the Cassette housing assembly is lowered in position prior to the reinstallation lt Note 3a gt e
44. r lever and clutch unit take up may slip out e After removing the control plate the parts shown in the following figure can be removed The numbers in dicate the removal sequence Control plate Slit washer 4 Slit disk take up 3 Clutch unit take up Slit washer 2 Ider arm assembly Fig 2 2 10a 2 2 11 Sub brake assembly take up control cam 1 Disengage the spring a of the sub brake assembly take up and while pushing the hook in the direction of the arrow remove the sub brake assembly take up upward 2 While pushing the claw in the disengaging direction re move the control cam 5 Sub brake assembly 7 take up a Hook Spring Fig 2 2 11a 2 2 12 Slide plate 1 Disengage the 7 claws on the back side of the mecha nism assembly by following the order from the claw on one end to that on the opposite end then remove the slide plate Note e After removing the slide plate it is possible to remove the main brake assembly take up and the change arm assembly lt Back side of mechanism assembly gt Remove the claws in order of arrow Claw Claw Change arm assembly Main brake assembly take up er E x O Slide plate Fig 2 2 12b 2 2 13 Change lever assembly rotar
45. r upper drum assem bly replacement refer to the parts list When the parts number of the upper drum assembly is not listed on the parts list then this cannot be replaced e When replacement is required control the up down movement of the brush Never apply grease e When replacing the upper drum assembly replace it the together with the washer 1 How to remove 1 Remove the stator assembly and rotor assembly 2 Loosen the screw of the collar assembly using a 1 5 mm hexagonal wrench and remove the collar assembly Also remove the brush spring and cap at one time 3 Remove the upper drum assembly and remove the washer using tweezers Collar assembly 1 5mm hexagonal wrench Spring 3 Brush Upper drum assembly Fig 2 2 19a 2 How to install 1 Clean the coil parts of the lower drum assembly and the newly installed upper drum assembly with an air brush in advance See Fig 2 2 19b 2 Install a new washer and upper drum assembly on the drum shaft See Fig 2 2 19a 3 Install the cap to the upper drum assembly 4 Position the collar assembly as indicated in Fig 2 2 19c 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
46. sembly O Other olo lololololololololo x Rotary encoder x Cleaning Inspection or replacement if necessary Table 2 1 5a 2 2 Replacement of major parts 2 2 1 Before starting disassembling This mechanism has an exclusive operation mode provided for disassembling and installation of the mechanism Mecha nism assembling mode and it is suggested to set the mechanism to this mode before disassembly and installation The Mechanism assembling mode is not gen erally used and becomes available by manual setting only Then this procedure starts with the condition that the cabi net parts and cassette housing assembly have been re moved 2 2 2 How to set the Mechanism assembling mode 1 Turn the loading motor belt by hand 2 Confirm that the hole of the control cam are aligned to the deck hole as shown in Fig 2 2 2a Loading motor belt Hole align with hole in deck Control cam Fig 2 2 2a 2 2 3 Pinch roller arm assembly 1 Remove the slit washer 2 Lift the pinch roller arm assembly and pull out it while pushing the pinch plate toward outside Slit washer t K Te Pinch roller J arm assembly Pinch plate Fig 2 2 3a 2 2 4 A C head 1 How to remove 1 Take out the 2 screws A 2 Remove the A C head with the head base 3 When replacing the A C head only remove the 3 screws B
47. sion arm assembly be sure to adjust the phase of the tension arm lever e After removing the clutch unit supply it is possible to remove the slit disk supply and main brake assem bly supply Tension arm assembly Tension arm lever Q Tension band assembly Main brake Reel disk assembly assembly supply supply Claw Slit washer Sub brake assembly supply Fig 2 2 14a 2 2 15 Take up head tension arm lever 1 Remove the take up head and tension arm lever Tension arm lever l Fig 2 2 15a 2 2 16 Guide rail 1 Take out the 5 screws A and 1 screw B 2 By expanding the rails on the outer sides of the guide rail remove the 2 pole base assemblies supply take up 3 Disengage the 4 claws and remove the guide rail Note e Before removing the guide rail it is required to remove the drum assembly A Pole base assembly y B ow Claw Claw Guide rail Fig 2 2 16a 2 2 17 Stator assembly 1 Remove the flat cable 2 Remove the two screws A B and remove the lug wire 3 Remove the stator assembly by lifting in the arrow indi cated direction Take care that the brush spring does not jump out Notes Be careful not to lose the brush and spring e There are some models that
48. sure off to cassette type de tection SEARCH FD Short REV being executed after END sensor on during unloading FE Tension loosening being executed after tape loading STOP with pinch roller pressure on 1 7 3 Mechanism sensor information Common table of MN HD and M3 Note EMG detail information lt 2 gt is the reference information 4 Mechanism mode position Common table of MN HD and M3 Display Mechanism mode position MN HD M3 0 7 Initial value 1 O EJECT position 0 EJECT position Cassette housing drive mode 2 7 Housing operating 1 Between EJECT and U L STOP 3 1 2 U L STOP position 3 Guide arm drive position 4 7 4 Tape being loaded unloaded When the pole base is located on the front side of the position just beside the drum 5 2 5 Tape being loaded unloaded When the pole base is located on the rear side of the position just beside the drum 6 7 6 Pole base compressed position 7 3 F FF REW position 8 7 F Between FF REW and STOP with pinch roller compres sion ON 9 4 F STOP with pinch roller compression OFF A 7 E Between STOP with pinch roller compression OFF and REV B 5 REV REV STILL SLOW positio
49. tation 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 is not supplied to the drum MDA E05 Cassette Eject EMG When the eject operation does not complete in 3 sec onds after the start E 05 is identified the pinch rollers are turned off and stopped and the power is turned off When the cassette insertion operation does not complete in 3 seconds after the start the cassette is ejected In addition when the operation does not complete within 3 seconds after the start E 05 is also identitied and the power is turned off immediately 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 tempera ture 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 Is not sup plied to the motor MDA
50. use care not to misplace the 3 springs Head base A C head e Pressure spring Pa gt S Head base Fig 2 2 4b 2 How to install 1 Temporarily set tne A C head height as indicated in Fig 2 2 4c A C head N Head base EEE ae 5 7mm Fig 2 2 4c 2 2 5 Pinch plate 1 How to remove 1 Disengage the 2 claws then remove the pinch plate Pinch plate l C Di Claw Claw f p Comm Gt Fig 2 2 5a 2 How to install 1 When installing the pinch plate align rack of the pinch plate and triangle mark of the control cam as indicated in Fig 2 2 5b I plate aol Y O Control cam Correct direction Fig 2 2 4a Fig 2 2 5b 2 2 6 Loading motor 1 Remove the belt from the worm gear assembly 2 Take out the 2 screws A and then remove the loading motor Note When installing the loading motor hold it so that the label faces upward Also take care with the wire colors Red line to pin 1 of connector or the loading motor Label Top view A Worm gear assembly Belt Fig 2 2 6a 2 2 7 Lever assembly sub deck assembly capstan motor 1 First remove the belt from the rear side capstans of the mechanism assembly 2 Ta
51. ushing the capstan brake assembly downward 2 10 Rotary encoder Position Claw Claw Align the triangle marks Holes align with hole in deck Change lever assembly Fig 2 3 3a Capstan brake assembly Holes align with hole in deck Control cam Fig 2 3 3b 2 3 4 Slide plate 1 While pushing down the main brake assemblies supply take up so that they come in contact with the extremity of the mechanism assembly attach the slide plate so that its alignment holes are aligned with the holes of the mechanism assembly Note e Free the spring of the sub brake assembly supply dur ing installation Main brake assembly supply Main brake assembly take up N N O MoS Lot 5 a Va ic i PAS are i SGA Set main brake assemblies to brake off position Holes align with hole in deck Slide plate Fig 2 3 4a 2 3 5 Control plate 1 Attach the control plate by aligning the 2 alignment holes on the control plate with the alignment holes on the main deck assembly as well as the alignment holes on the take up lever As the take up lever is pulled by a tension spring use a pair of tweezers or similar too to align the holes 2 After attaching the control plate lock it with the slit was
52. y encoder 1 Slide the change lever assembly in the direction of the arrow and remove 2 While pushing the claws on both sides in the disengag ing directions take out the rotary encoder 3 When attaching the rotary encoder position it so that the alignment markings face each other as shown in Fig 2 2 13a then attach the rotary encoder Notes e Before removing the change lever assembly it is re quired to remove the belt Fig 2 2 12a e Take care of the cassette gear which is disengaged at the same time as the change lever assembly is re moved Rotary encoder Position Claw Claw Align the triangle marks Cassette gear Change lever assembly Fig 2 2 13a 2 2 14 Tension arm assembly tension band assembly reel disk assembly supply sub brake assembly supply clutch unit supply take up lever 1 Disengage the spring a of the sub brake assembly sup ply from the hook 2 Disengage the spring c from the hook 3 Take out the slit washer and remove the tension arm assembly Also remove the tension band assembly by disengaging the claw 4 Take out the slit washer and remove the reel disk as sembly supply 5 While pushing the claw in the disengaging direction re move the sub brake assembly supply 6 Remove the clutch unit supply 7 Remove the take up lever assembly Notes e When attaching the ten

JVC KV-V8 User's Manual

Contents

Download Pdf Manuals

Related Search

Related Contents