JVC XV-1000BK Service Manual Download Page 47

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7. Removing the traverse unit
1) Remove the loading tray.
2) Remove the four screws 'I' and fixtures which fix the traverse unit.
3) The traverse unit is connected with the rotary cam. Carefully remove the traverse unit by lifting

the rear side (the side with the rotation support flat spring).

8. Disassembling parts of the loading mechanism
1) Without removing the traverse unit, gears and belt can be removed as follows:

Figure 9

Figure 10

Connection

Belt

Pulley

gear

Rotary

gear

Tray

gear

Rotary

cam

Loading motor

Summary of Contents for XV-1000BK

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Page 43: ...erse unit pull out the metal short pin for protection from charging 5 When replacing the pickup after mounting a new pickup remove the solder on the short land which is provided at the center of the flexible wire to open the circuit 6 Half fixed resistors for laser power adjustment are adjusted in pairs at shipment to match the characteristics of the optical block Do not change the setting of thes...

Page 44: ...ng the front panel 1 Remove the top cover 2 Remove the screw C which fixes the terminal wire 3 Remove the three screws D which fix the front panel on the bottom 4 Remove connectors CN501 CN703 CN902 and CN905 If necessary also remove the tie band 5 Remove the three claws and then the front panel A Bx4 D Claw C PHONES LEVEL knob Tie band Figure 1 Figure 2 Figure 3 Claw Claw ...

Page 45: ...layer can easily be destroyed by static electricity charged on the human body Be sure to wear an earth band before touching the periphery of the loading base In addition when the connector is disconnected be sure to short circuit the flexible wire a by the attached metal clip 3 Remove flexible wire b 4 Remove the four screws G which fix the loading base Figure 4 Figure 5 Flexible wire a E Be sure ...

Page 46: ... damage the claws H 6 Removing the loading tray 1 Remove the clamper plate 2 With tweezers or the like move the part of the rotary cam which protrudes from the bottom of the loading base to the TRAY OPEN position 3 The tray can be moved to the TRAY OPEN position by hand 4 Open outwards the left and right tray locks and pull out the tray TRAY CLOSE position TRAY OPEN position Tray lock Tray lock Fi...

Page 47: ...ted with the rotary cam Carefully remove the traverse unit by lifting the rear side the side with the rotation support flat spring 8 Disassembling parts of the loading mechanism 1 Without removing the traverse unit gears and belt can be removed as follows I Figure 9 Figure 10 Connection Belt Pulley gear Rotary gear Tray gear Rotary cam Loading motor I ...

Page 48: ...r bolts I 11 Assembling the loading tray 1 Turn the tray gear counterclockwise several revolutions until the traverse unit comes to the lowest position 2 Push the rotary cam on point 1 in the direction of the arrow 3 Make sure that the claws of the loading cam are all locked 4 Insert the tray straight with respect to the loading base 12 Assembling the loading base 1 Mount the clamper plate and the...

Page 49: ...DVD MENU keys simultaneously on the DVD player turn on the primary power 2 Press the POWER switch to start the DVD player then TEST is displayed on the FL TEST mode can be canceled with the POWER ON OFF switch 3 Input a 100kHz rectangular wave from the oscillator to TP207 after cutting the DC element by a 0 1microF capacitor In this case with the oscillator mounted on the main unit set the amplitu...

Page 50: ...ray comes out This key is disabled during the initialization of EEPROM When this key command is accepted to open the tray the initialization of EEPROM has already ended 3 With the test disc supplied from JVC DEMO1004 on the tray press the OPEN CLOSE key to let the tray retreat Do not push the tray in 4 Press the ON SCREEN key The disc rotates for a while and then stops 5 Press the PLAY key 6 Adjus...

Page 51: ...transformer and the thermal fuse between 5 and 6 Voltage of IC901 3 at 5 V Check the wiring between D902 or transformer to IC901 3 Replace IC901 Continuity OK between IC901 3 and IC601 73 Is IC901 hot to Micro computer Volume to Power Supply Volume To Microcomputer Volume Repair the wiring NO YES NO NO YES YES NO YES NO NO YES OK NG YES NO NO YES YES NO YES NO YES NO YES NO YES YES NO NO YES NO Po...

Page 52: ... defective or the wiring may be short circuited 3 Open Close Operation Press OPEN CLOSE key Does the tray smoothly open Voltage of IC401 35 at 0V of the remote control box functions normally Any voltage applied between CN102 4 and 5 Check the connection between CN102 and mechanical unit Check the mechanical unit Check IC251 and the periphery To Microcomputer Volume Check S831 OPEN CLOSE and the wi...

Page 53: ...g Conditions IC601 System microcomputer 1 5V must be applied to 72 and 73 2 Oscillators of 31 and 32 must be oscillating correctly 3 Input to 16 RESET must be at 5V reset cancel If above 1 to 3 are not satisfied when the P STANDBY indicating lamp does not light at power on IC601 may be defective IC401 Main microcomputer 1 5V must be applied to 8 13 and 42 2 Clock signal 13 5MHz must be input to 14...

Page 54: ...wing codes is displayed on FL Error codes displayed on FL when single layer DVD is inserted Error code Content of error 01 02 03 04 05 06 07 08 09 0A 0B 80 81 82 83 Servo RAM writing NG Spindle start error Disc type judgment error Focus ON NG Focus balance coarse adjustment NG Phase difference cancel adjustment NG Tracking balance adjustment NG Tracking ON NG Spindle 1 8T mode NG Focus balance fin...

Page 55: ...ance coarse adjustment NG 84 85 86 87 88 89 8A 8B 8C 8D 8E 8F 90 Layer change jump NG None None Servo RAM writing NG Servo RAM writing NG Servo RAM writing NG Servo RAM writing NG Servo RAM writing NG Traverse movement NG Servo RAM writing NG Servo RAM writing NG Servo RAM writing NG Servo RAM writing NG Check point for each error in Servo Volume 1 to 1 to 2 to 3 to 4 to 5 to 6 to 7 to 8 to 9 to 1...

Page 56: ...nt NG Tracking balance adjustment NG Tracking ON NG Servo RAM writing NG None None None Spindle CLV NG 84 85 86 87 88 89 8A 8B 8C 8D 8E 8F 90 None None Servo RAM writing NG Servo RAM writing NG Servo RAM writing NG Servo RAM writing NG Servo RAM writing NG Traverse movement NG Servo RAM writing NG Servo RAM writing NG None Servo RAM writing NG Check point for each error in Servo Volume 1 to 1 to 2...

Page 57: ...ain CB Is digital signal output from IC701 18 and 19 Replace IC701 Is digital signal output from IC702 7 NO Check IC702 and PLL YES Is digital signal output from IC701 20 NO Replace IC701 Is digital signal output from IC702 10 13 16 and 19 Replace IC702 Check IC703 IC704 and their periphery When fs 44 1kHz When fs 48kHz When fs 96kHz 0 6V 0 9V 2 6V PLL normal lock voltage Between TP701 and TP702 C...

Page 58: ...RE AMP IC201 READ CH IC351 DEM ECC IC453 DESCRAMBLER IC451 V DEC IC501 A DEC IC701 K2 I F IC702 DAC LPF DISC IC101 PRE AMP IC201 READ CH IC354 CD DSP IC501 A DEC DISC IC101 PRE AMP IC201 READ CH IC351 DEM ECC IC453 DESCRAMBLER IC451 V DEC IC501 A DEC IC354 CD DSP ...

Page 59: ...ace IC553 2 Only 1 4 compressed playback screen of DVD or video CD is abnormal Replace IC552 YES YES YES YES NO NO NO NO NO YES Power supplied correctly to each IC to Power Supply Volume Check L681 L682 and IC651 OK Is signal output from CN651 2 and 4 Check the insertion of L680 L683 IC651 IC655 and CN651 5V power for video section is supplied from IC654 Check I O voltage of IC654 Is digital signa...

Page 60: ...en CN101 33 34 and 35 pins Must be approx 11ohms EHall element Is a sine wave output between CN101 25 and 27 between 28 and 29 and between 30 and 31 during rotation In either case replace the mechanical unit Defective spindle driver IC252 EIs a driving wave output from CN101 33 34 and 35 During rotation Is IC252 1 at H level START Servo IC Is control signal sent to the motor driver TP256 Duty is 5...

Page 61: ...ent of disc type may not be successful Therefore after removing the cause of traverse movement re execute automatic adjustment and confirm that no problem exists Check points a During stop Whether 50 duty pulse is output to TP253 Whether W003 is at approx 2 5VDC Offset voltage between CN101 34 and 35 scores mV if exists b When tray is opened or closed Check by oscilloscope whether a rectangular wa...

Page 62: ... as blooming occurred during adjustment 8 Tracking ON NG Mechanical unit is defective Cannot retract normally due to abnormal adjustment value of 5 to 7 Periphery of driver IC251 Constant or IC itself is defective When passed without entering abnormal condition in the adjustment of 5 to 7 Servo IC IC301 When improperly adjusted due to defective IC 5 to 7 9 Spindle 1 8T mode NG Is RFAS3 input to IC...

Page 63: ...n 2 17V Connect to an oscilloscope and press the PLAY key When higher than 2 17V due to improper adjustment caused by defective mechanical unit IC101 or IC201 or abnormality in IC301 IC251 IC301 IC252 When lower than 2 17V due to defective input to A D 75 of JIOUT of IC301 although this rarely occurs 15 Address read NG Continuity of CRC OK and address is checked Press the PLAY key Is signal output...

Page 64: ...heck the constant of the periphery of DSL and PLL Check the capacitors and resistors connected to IC354 2 to 6 for cold solder Is clock signal input IC402 R415 C362 IC354 33 Is clock signal output IC354 34 IC354 is defective Error code 92 occurs when re judging whether CLV is OK or not after all adjustments have succeeded Therefore this error rarely occurs Check RF signal system defective jitter C...

Page 65: ...t trapezoidal and voltage is low b Is kick available Check the control voltage waveform from TP251 W001 From IC301 to W001 Check the waveform of CN101 22 and 23 After the driver IC251 Although differs in amplitude and DC offset the waveform is similar to that of W003 Long distance seek Feed Tracking Hold DC during feed Acceleration pulse at start deceleration pulse at stop each one In the directio...

Page 66: ...motor may be defective or the mechanical unit has seized 3 Block noise appears in picture or abnormal sound occurs occasionally NO YES Mechanical unit is defective Does noise exist on RFAS3 Is JITOUT higher than 2 V If noise exists check each connector for loose connection Check the line of IC101 IC201 and IC301 cold solder etc Does noise exist on JITOUT Except during kick If noise exists check th...

Page 67: ...equency counter play back the 1st program of CTS 1000 on a 1 second gate OK when the indication of the counter is 10 to 20 If the indication is 50 to 100 the mechanical unit may be defective Counter indication must be 7 35kHz during stop When error rate is OK fine flaws are probably the cause Check that signal is input from IC301 61 to IC354 61 DO When above check is OK some system other than the ...

Page 68: ...s longer Crosstalk might occur from tracking to focus system When FE was observed during search skip etc it was found that a wave resembling TE with an amplitude of 200mVp p was riding on FE Mechanical unit was replaced Error frequently occurred in the outer part of discs although no error occurred in the inner part Mechanical unit was replaced because tilt seemed to be defective ...

Page 69: ...oscilloscope ...

Page 70: ...FE Zoom ...

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Page 75: ...Because of storage oscilloscope overwrite mode RF related waveform may be different from those observed by an analog oscilloscope ...

Page 76: ...TE Zoom ...

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Page 78: ... CN102 M ACTF ACTT FEED ACTT ACTF FEED FG ADDI3 ADDI0 PWMDA FEO TE FL DRIVER IC831 M66004SP FL DISPLAY DI831 QLF0001 001 REMOTE CONTROL RECEIVER IC832 GP1U271X KEY MATRIX LED DRIVER Q831 836 DVD IND D831 LED D841 D836 838 POWER KEY S843 ENS 002 3 ENS 002 2 ENS 002 1 F1 F2 30V B5V 27MHz 33 8688MHz 33 8688MHz 18 432MHz RFAS3 LDON 3 MODE SELECT 1 DFL TOP ARF SRD RDCK DMSRVR DMSRVP DMSRDT DMSRCK JITOU...

Page 79: ...SET MUTE CONTROL POWER SUPPLY FOR AUDIO POWER SUPPLY FOR VIDEO CN651 Y VIDEO DATA INPUT LPF L681 QQR0623 001 SOFT SHARP SW Q680 2SC174C VCD IC651 1 3 BURST CONT Q681 2SK519 C LPF L682 QQR0624 001 BURST IC651 1 3 BPF L680 QQR0625 001 LPF L683 QQR0622 001 IC651 1 3 IC655 1 2 IC655 1 2 J651 VIDEO OUT J652 S VIDEO OUT S1 S2 AV COMPULINK I F Q652 AVCO AVCI J655 AV COMPULINK DIG OUTPUT J653 OPTICAL DIGI...

Page 80: ...20 10V REG Q902 D910 10V ON OFF CONTROL Q903 Q904 Q908 Q909 10V REG Q905 D909 MUTING DRIVER Q917 MOTOR 9V REG IC902 PQ09RF2 BACK UP 5V REG IC901 LM2940CT 5 0 DIGITAL 5V REG Q906 DIGITAL 3 3V REG Q907 DC DC CONVERTE R IC903 UPC1100C CN902 CN903 CN904 CN905 TO ENS 002 1 TO ENS 002 6 TO ENS 002 5 TO ENS 001 TO ENS 001 ON OFF CONTR OL ...

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