manualshive.com logo in svg

JVC UX-G70B, Service Manual, Page: 13 / 38

Share
Download
JVC UX-G70B Service Manual Download Page 13

(No.MB505)1-13

3.1.9 Removing the transformer board 

(Fig.12)

(1) Disconnect the connector wire from the connector 

CN903

on the transformer board.

(2) Remove the one screw 

M

 attaching the transformer board.

(3) Disconnect the connector 

CN901

 connecting the regulator

board and then removing the transformer board with power
cord.

Fig.12

3.1.10 Removing the main board 

(Fig.13)

(1) Disconnect the card wire from the connector 

CN703

 on the

main board.

(2) Remove the one screw 

N

 attaching the main board.

(3) Disconnect the main board from the connector 

CN701

 and

CN702

 connecting the regulator board.

Fig.13

3.1.11 Removing the amplifier board 

(Fig.14)

(1) Disconnect the amplifier board from the connector 

CN353

and 

CN354

.

Fig.14

CN904

CN903

CN901

M

N

CN703

CN702

CN701

CN354

CN353

Summary of Contents for UX-G70B

Page 1: ... 6 UX G70J UX G70C UX G70B UX G70E UX G70EN UX G70EV UX G70EE Lead free solder used in the board material Sn Ag Cu melting point 219 Centigrade TABLE OF CONTENTS 1 PRECAUTION 1 3 2 SPECIFIC SERVICE INSTRUCTIONS 1 8 3 DISASSEMBLY 1 9 4 ADJUSTMENT 1 32 5 TROUBLESHOOTING 1 37 CA UXG70 SUPER VIDEO SP UXG70 SP UXG70 ...

Page 2: ...for europe RGB 0 7 V p p 75 Ω for europe COMPONENT Y 1 V p p 75 Ω PB PR 0 75 V p p 75 Ω for northern america PB PR 0 7 V p p 75 Ω for europe Speaker impedance 6 Ω 16 Ω Headphone impedance 16 Ω 1 kΩ Tuner section FM tuning range 87 5 MHz 108 0 MHz AM tuning range 530 kHz 1 710 kHz for northern america 522 kHz 1 629 kHz fro europe Disc player section Playable disc DVD Video DVD Audio CD VCD SVCD CD ...

Page 3: ...ack control shafts etc to be sure the product is safe to operate without danger of electrical shock Do not use a line isolation transformer during this check Plug the AC line cord directly into the AC outlet Using a Leakage Current Tester measure the leakage current from each exposed metal parts of the cabinet particular ly any exposed metal part having a return path to the chassis to a known good...

Page 4: ...same safety characteristics as the recommended replacement parts shown in the Parts List of the Service Manual and may create shock fire or other hazards 4 The leads in the products are routed and dressed with ties clamps tubings barriers and the like to be separated from live parts high temperature parts moving parts and or sharp edges for the prevention of electric shock and fire hazard When ser...

Page 5: ...e in the optical pickup The tester s internal power source can easily destroy the laser diode 1 7 Handling the traverse unit optical pickup 1 Do not subject the traverse unit optical pickup to strong shocks as it is a sensitive complex unit 2 Cut off the shorted part of the flexible cable using nippers etc after replacing the optical pickup For specific details refer to the replacement procedure i...

Page 6: ...1 B9600 B9202 B9502 B9501 B9302 B9101 B9100 B9301 B9300 HS902 B9104 B9105 B9900 B9102 B9103 R9050 C9052 EP901 C9043 CN906 Graphic symbol mark This symbol means fast blow type fuse FOR CONTINUED PROTECTION AGAINST RISK OF FIRE REPLACE ONLY WITH SAME TYPE AND RATING OF FUSES should be read as follows F9001 6 3A 125V F9002 6 3A 125V F9003 3 15A 125V F9004 3 15A 125V F9006 2 5A 125V F9001 6 3A 125V F9...

Page 7: ...t uses visible and or invisible laser radiation and is equipped with safety switches which prevent emission of radiation when the drawer is open and the safety interlocks have failed or are defeated It is dangerous to defeat the safety switches 5 CAUTION If safety switches malfunction the laser is able to function 6 CAUTION Use of controls adjustments or performance of procedures other than those ...

Page 8: ...1 8 No MB505 SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS ...

Page 9: ...e six screws A attaching the side panel See Fig 1 2 Remove the four screws B attaching the side panel See Fig 2 3 1 2 Removing the top cover Fig 1 3 1 Remove the one screw C attaching the top cover See Fig 1 2 Remove the two screws D attaching the top cover See Fig 3 Fig 1 Fig 2 Fig 3 A A C G G B B D ...

Page 10: ...e from the connector CN713 on the main board See Fig 4 4 Disconnect the connector wire from the connector CN405 on the video board See Fig 4 5 Remove the two screws E and two screws F attaching the front panel See Fig 5 6 Remove the hook a See Fig 5 7 Remove the hook b and then removing the front panel See Fig 6 Fig 4 Fig 5 Fig 6 3 1 4 Removing the rear cover Fig 1 1 Remove the two screws G attach...

Page 11: ...Fig 8 3 1 6 Removing the tuner pack Fig 8 9 1 Disconnect the card wire from the connector CN712 on the main board See Fig 9 2 Remove the two screws J attaching the tuner pack See Fig 8 3 1 7 Removing the fan Fig 8 9 1 Disconnect the connector wire from the connector CN708 on the main board See Fig 9 2 Remove the two screws K attaching the fan See Fig 8 Fig 7 Fig 8 Fig 9 CN401 CN402 H H J K CN712 C...

Page 12: ...1 12 No MB505 3 1 8 Removing the rear panel Fig 10 11 1 Remove the eight screws L attaching the rear panel See Fig 10 2 Remove the rear panel from the hook c See Fig 11 Fig 10 Fig 11 L L L L hook c ...

Page 13: ...ing the transformer board with power cord Fig 12 3 1 10 Removing the main board Fig 13 1 Disconnect the card wire from the connector CN703 on the main board 2 Remove the one screw N attaching the main board 3 Disconnect the main board from the connector CN701 and CN702 connecting the regulator board Fig 13 3 1 11 Removing the amplifier board Fig 14 1 Disconnect the amplifier board from the connect...

Page 14: ...om the connector CN361 on the regulator board 2 Remove the four screws P attaching the regulator board 3 Disconnect the card wire from the connector CN356 Fig 15 3 1 13 Removing the power transformer Fig 16 1 Remove the four screws Q attaching the power transform er Fig 16 CN361 CN356 P P Q Q ...

Page 15: ...VD changer mechanism assembly Fig 17 to 19 1 Remove the four screws R attaching the main chassis See Fig 17 2 Remove the two screws S and two screws T attaching the DVD changer mechanism assembly See Fig 18 19 Fig 17 Fig 18 Fig 19 R R s T ...

Page 16: ...0 3 1 16 Removing the FL board Fig 21 1 Remove the four screws V attaching the FL board 2 Disconnect the card wire from the connector CN100 on the FL board Fig 21 3 1 17 Removing the switch board Fig 22 1 Remove the volume knob 2 Remove the twelve screws W attaching the switch board Fig 22 U V V CN100 W W W W ...

Page 17: ... mechanism assembly See Fig 3 4 From the right side of the DVD changer mechanism as sembly draw out the tray assemblies toward the front while pushing the part b of the side R assembly See Figs 4 and 5 Note The tray can be locked if all tray assemblies are at tached 5 From the topside of the DVD changer mechanism assem bly move the stopper tabs c in the direction of the arrow and release them Pull...

Page 18: ...1 18 No MB505 Fig 3 Fig 4 Fig 5 Open det lever b Tray assemblies Side R assembly c Tray assembly ...

Page 19: ...ws B attaching the DVD servo board See Fig 7 5 From the reverse side of the DVD servo board release the lock of the connector CN101 in the direction of the arrow and disconnect the card wire See Fig 8 Caution Unsolder the solders from the short land sections d after reas sembling See Fig 6 3 2 3 Removing the switch board See Fig 7 1 From the bottom side of the DVD changer mechanism as sembly remov...

Page 20: ...motor board See Fig 10 5 Disconnect the card wire from the connector CN1 on the forward side of the motor board See Fig 10 Note When connecting the card wire let the card wire through the slots h of the motor board See Fig 10 Reference You need not to remove the tray assemblies and in such case move it 3 2 5 Removing the motor See Fig 10 Remove the motor board 1 From the reverse side of the motor ...

Page 21: ...m the bottom side of the DVD changer mechanism as sembly remove the three screws F attaching the DVD traverse mechanism assembly 2 Remove the wires from the section j 3 Take out the DVD traverse mechanism assembly from the DVD changer mechanism assembly Fig 11 F F j F DVD changer mechanism assembly DVD traverse mechanism assembly ...

Page 22: ...move the two screws H attaching the rack arm spring and rack arm See Fig 14 8 Pull the guide shaft from the DVD pickup in the direction of the arrow See Fig 14 3 2 8 Attaching the DVD pickup See Figs 12 to 14 1 Attach the guide shaft to the DVD pickup and attach the rack arm spring and rack arm with the screws H See Fig 14 2 Attach the section q of the DVD pickup to the C TM chassis first and atta...

Page 23: ... No MB505 1 23 Fig 14 Fig 15 DVD pickup Rack arm Rack arm spring H Guide shaft 2 2 2 1 Screw shaft gear DVD pickup Connector ...

Page 24: ...om the soldered sections r on the spindle motor board See Fig 16 2 From the bottom side of the DVD traverse mechanism as sembly remove the three screws J attaching the spindle motor board See Fig 17 Reference When attaching the spindle motor board let the card wire through the hole s on the C TM chassis See Fig 17 Fig 16 Fig 17 r Spindle motor board DVD traverse mechanism assembly J C TM chassis D...

Page 25: ...e Fig 18 3 Remove the screw shaft from the section v and remove it in the direction of the arrow See Fig 19 4 Remove the middle gear See Fig 19 5 Remove the screw L attaching the feed motor to the C TM chassis See Fig 19 6 Remove the wires from the soldered sections w on the spindle motor board See Fig 19 7 Take out the feed motor from the motor base Reference After attaching the feed motor pass t...

Page 26: ... CN3 on the tray switch board from the motor board and detach the side L in an upward direction See Fig 21 3 Remove the screw N attaching the tray switch board to the side L See Fig 22 4 Release the joint tab y of the side L in the direction of the arrow 1 and release the joint tab z while removing the tray switch board in the direction of the arrow 2 See Fig 22 Fig 20 Fig 21 Fig 22 M SIde L M DVD...

Page 27: ...D changer mechanism assem bly turn the gear 1 clockwise to move the elevator cam rearward See Fig 25 4 Move the two slots ac and joint ad of the elevator cam and remove the elevator cam outward See Fig 25 5 Remove the three screws P and detaches the side R as sembly upward See Figs 26 and 27 Note When reattaching the side R assembly make sure to fit the shaft part ae into the slot of the select le...

Page 28: ...ints ag to detach from the rack holder See Fig 30 4 Release the rod L from part ah See Fig 30 5 Turn the gear 1 clockwise again to move the lifter assembly upward See Fig 31 6 Remove the lifter assembly from the DVD changer mecha nism assembly upward at the positions ai where the four pins on the both sides of the lifter assembly fit to the notch es of the loader assembly See Fig 31 7 Move the lif...

Page 29: ...res 2 Remove the two screws Q and take out the sensor board with the SV resistor Reference Remove the soldered section ap on the sensor board as re quired When reassembling pass the wires through the slot ak of the sensor board as before Note When reattaching the SV resister fit the projection am on the bottom of the SV resister into slot an of the sensor slider Fig 33 Q Q ap Sensor board ak SV re...

Page 30: ... upward See Fig 34 4 Turn the gear 2 clockwise to move the sub tray remaining inside the lifter assembly toward the front then pull out See Fig 34 5 Take out the disc on the sub tray See Fig 35 6 After clearing away the disc insert the sub tray into the main tray See Fig 36 Note When reattaching the sub tray move the tray stopper on the bottom of the main tray in the direction of the arrow to lock...

Page 31: ... No MB505 1 31 Fig 36 Fig 37 Main tray Sub tray Tray stopper Tray stopper ...

Page 32: ... OFF FANCTRL L H TOGGLE This test mode is only effective during STANDBY MODE Need to set POUTREG to H when FANCTRL is H Test mode exit when system STANDBY P ON VOLUME LARGE STEP CHANGE Remocon Key STANDBY ON ENTER 1 VOLUME CHANGE VOLUME STEP MAX 40 VOLUME STEP CENTER 20 TOGGLE Normal Operation TEST mode System returns to normal operation after performing VOLUME CHANGE MICON VERSION DISPLAY Remocon...

Page 33: ... that DVD Test mode is successfully exit 3 POFF OK Display will be indicated for 5sec only then it will return to Standby Mode Display 4 After POFF OK dsiplay system is now go back to normal operation mode STOP LINE key In standby after safety trigger 1 To enter DVD TEST mode a AC POWER OFF b Press and hold STOP DVD5 EJECT CLOSE keys c AC POWER ON while holding STOP DVD5 EJECT CLOSE keys d Sys con...

Page 34: ...k when Byte4 is 0xFF T x x y v w 4 DEVICE KEY CHECKSUM DISPLAY a During DESTINATION INFO display screen 1 press MENU key to enter DEVICE KEY CHECKSUM display TEST MODE MODE STATE CHECK MODE DEVICE KEY CHECKSUM FL will display Example X X X X X X X DISPLAY BOTH CPPM AND CPRM X 5 DVD CHECK MODES a Press MENU key again to enter CHECK MODE TEST MODE MODE STATE CHECK MODE FL Display FL Display H C E K ...

Page 35: ... 9 key on REMOTE CONTROL to perform SEARCH DVD_SL DESIGNATED POSITION and JITTER MEASUREMENT FL Display P E E F D 2 seconds Static W c c c c j j j j Status 00 NORMAL XX XX cc cc jj jj cccc Byte 0 0x00 Byte 7 0x00 Byte 3 4 DISPLAY jjjj Byte 0 0x00 Byte 7 0x00 Byte 5 6 DISPLAY Press 10 key on REMOTE CONTROL to perform SEARCH DVD_DL PARALLEL DISC DESIGNATED POSITION and JITTER MEASUREMENT FL Display ...

Page 36: ...splay R J T I S L 2 seconds Static c c c c j j j j Status 00 NORMAL XX XX cc cc jj jj b During CHECK mode at any time press MENU key to exit CHECK mode and return to starting screen of DVD TEST MODE During TEST mode at press POWER key send POWER OFF command to MECHA CON and if poweroff permit flag is 1 display POFF OK FL display remains F F F F F F F F Static F F K O O P ...

Page 37: ... No MB505 1 37 SECTION 5 TROUBLESHOOTING This service manual does not describe TROUBLESHOOTING ...

Page 38: ... No MB505 Audio Video Systems Category 10 1 1chome Ohwatari machi Maebashi city 371 8543 Japan Victor Company of Japan Limited VPT Printed in Japan ...

Reviews:

No comments