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JVC KD-SH707 Service Manual

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SERVICE MANUAL

ATT
ANGLE
CD
DAB
DISC
FM
PRESET
AM
R D
CH
DISC
AUX
SEL
VOLUME
RM-RK100
Contents
Safety precaution
Preventing static electricity
Disassembly method
Adjustment method
CD RECEIVER
KD-SH707
EQ
MOSFET
2 0 0 W
PRESET
1-2
1-3
1-4
1-23
COPYRIGHT
2002 VICTOR COMPANY OF JAPAN, LTD.
EB
D
B
M
E-BASS
DISP
BAND
MODE
Flow of functional
operation unit TOC read
Maintenance of laser pickup
Replacement of laser pickup
Description of major ICs
KD-SH707
ATT
M P 3
INPUT
Area Suffix
J -------- Northern America
1-24
1-26
1-26
1-27~51
No.49699
Mar. 2002

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Summary of Contents for JVC KD-SH707

  • Page 1: Service Manual

    KD-SH707 SERVICE MANUAL CD RECEIVER KD-SH707 ANGLE MOSFET 2 0 0 W E-BASS DISP BAND MODE DISC PRESET PRESET M P 3 INPUT DISC VOLUME RM-RK100 Area Suffix J -------- Northern America Contents Safety precaution Flow of functional Preventing static electricity...

  • Page 2: Safety Precaution

    KD-SH707 Safety precaution Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of preforming repair of this system. Please use enough caution not to see the beam directly or touch it in case of an...

  • Page 3: Preventing Static Electricity

    KD-SH707 Preventing static electricity 1.Grounding to prevent damage by static electricity Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.

  • Page 4: Disassembly Method

    KD-SH707 Disassembly method Front panel assembly Removing the front panel assembly (See Fig.1) Press the release button in the lower right part of the front panel assembly to unlock. Remove the front panel assembly in the direction of the arrow.
  • Page 5 KD-SH707 Remove the three screws B on both sides of the body. Top chassis Remove the screw C and the three screws D on the left side of the body. Remove the two screws E and the screw F on the back of the body.
  • Page 6 KD-SH707 Removing the CD mechanism assembly Top chassis (See Fig.8) Prior to performing the following procedure, remove the top chassis. Remove the three screws H inside the top chassis and remove the CD mechanism assembly. Removing the motor assembly CD mechanism assembly (See Fig.9 to 11)

  • Page 7: Removing The Mainboard

    KD-SH707 Removing the main board (See Fig.12 to 16) Main board Prior to performing the following procedures, remove the top chassis and the motor bracket. Disconnect the flexible wire from connector CN701 and CN702 on the main board respectively. brackets (R) Move the front bracket backward until it stops.
  • Page 8 KD-SH707 Remove the two screws L and move the main board backwards to release the two joints c. (The main board will be removed with the rear panel and the Joint c rear heat sink) Joint c Main board Remove the screw N and Q attaching the rear heat sink.
  • Page 9 KD-SH707 Removing the lifter board Main board (See Fig.18 to 24) Prior to performing the following procedure, remove the top chassis assembly and the front panel assembly. Disconnect the flexible wire from connector CN702 on the main board. Remove the four screws S attaching the front bracket on both sides of the body.
  • Page 10 KD-SH707 Remove the screw T attaching the lifter board cover Joints e Joints e in the rear of the front bracket. Lifter board cover Joint f Release the two joints f while pushing the front side. Joint f Move the lifter board cover in the direction of the arrow and release the eight joints e.
  • Page 11 KD-SH707 <Front panel assembly> Rear panel Prior to performing the following procedure, remove the front panel assembly. Removing the front board (See Fig.25 and 26) Remove the four screws V attaching the rear panel to the front panel assembly. Joint g Release the eleven joints g of the front panel and the Fig.25...

  • Page 12: Removing The Top Cover

    KD-SH707 < CD mechanism section > Removing the top cover (See Fig.1 and 2) Remove the two screws A on each side of the body. Top cover Joints a Lift the front side of the top cover and move the cover backward to release the two joints a.
  • Page 13 KD-SH707 Removing the DET switch (See Fig.3 and 6) Extend the two tabs c of the feed sw. holder and pull out the switch. DET switch Unsolder the DET switch wire if necessary. Connector board Removing the chassis unit (See Fig.7 and 8)
  • Page 14 KD-SH707 Removing the clamper assembly (See Fig.9 and 10) Prior to performing the following procedure, remove Clamper arm the top cover. spring Remove the clamper arm spring. Move the clamper assembly in the direction of the arrow to release the two joints d.

  • Page 15: Removing The Pickup Unit

    KD-SH707 Feed sw. holder Removing the pickup unit (See Fig.13 to 17) Joint f Prior to performing the following procedure, remove the top cover, the connector board and the chassis unit. Remove the screw D and pull out the pu. shaft holder from the shaft.
  • Page 16 KD-SH707 Removing the trigger arm (See Fig.18 and 19) Joint k Prior to performing the following procedure, remove the top cover, the connector board and the clamper unit. Trigger arm Turn the trigger arm in the direction of the arrow to release the joint k and pull out upward.
  • Page 17 KD-SH707 Joint a' Link plate Joint r Removing the select arm (L) / select lock Select arm (L) Joint z Select arm (R) arm (See Fig.21 and 22) Select lock arm Prior to performing the following procedure, remove the top plate assembly.
  • Page 18 KD-SH707 Joint a' Link plate Joint r Removing the select arm (R) / link plate Select arm (L) Joint z Select arm (R) (See Fig.21 and 22) Select lock arm Prior to performing the following procedure, remove the top plate assembly.
  • Page 19 KD-SH707 Roller guide Removing the loading roller assembly Washer (See Fig.27 to 29) Loading roller assembly Prior to performing the following procedure, remove the clamper assembly and the top plate assembly. Roller guide Push inward the loading roller assembly on the gear side and detach it upward from the slot of the joint d’...
  • Page 20 KD-SH707 Removing the loading gear (5), (6) and Loading gear bracket (7) (See Fig.31 and 32) Loading gear (6) Prior to performing the following procedure, remove the top cover, the chassis unit and the top plate assembly. Remove the screw J...
  • Page 21 KD-SH707 Removing the gears (See Fig.33 to 36) Prior to performing the following procedure, remove the top cover, the chassis unit, the top plate assembly and the pickup unit. Slot j' Pull out the feed gear. Slide plate Loading plate assembly...
  • Page 22 KD-SH707 Removing the turn table / spindle motor Turn table (See Fig.37 and 38) Prior to performing the following procedure, remove the top cover, the connector assembly and the chassis / clamper assembly. Remove the two screws K attaching the spindle motor assembly through the slot of the turn table on top of the body.
  • Page 23 KD-SH707 Adjustment method Test instruments required adjustment Standard volume position 1.Digital oscilloscope (100MHz) Balance and Bass & Treble volume : Indication "0" 2.AM Standard signal generator Loudness : OFF 3.FM Standard signal generator Frequency Band 4.Stereo modulator FM 87.5MHz - 107.9 MHz 5.Electric voltmeter...

  • Page 24: Flow Of Functional Operation Unit Toc Read

    KD-SH707 Flow of functional operation unit TOC read Power ON When the laser diode correctly Set Function CD When the pickup correctly moves emits to the inner area of the disc Microprocessor $82 $81 Microprocessor Disc inserted commands commands 3.3V 3.3V...

  • Page 25: Feed Section

    KD-SH707 Feed section Is the voltage output at Is the wiring for IC521 Is 3.3V present at IC561 IC521 pin "40" 5V or 0V? (56)~(64) correct? pin "20"? Check CD 8V Check the vicinity of and 5V. IC521. Is 4V present at both...

  • Page 26: Maintenance Of Laser Pickup

    KD-SH707 Maintenance of laser pickup (1) Cleaning the pickup lens Before you replace the pickup,please try to clean the lens with a alcohol soaked cotton swab. (2) Life of the laser diode When the life of the laser diode has expired.
  • Page 27 KD-SH707 Description major of ICs BA6956AN (IC495) : Motor driver 1.Terminal layout 2.Block diagram CONTROL LOGIC 3.Pin function Pin No. Symbol Function Output high voltage level control terminal OUT2 Output terminal for motor GND of driver division OUT1 Output terminal for motor...
  • Page 28 KD-SH707 TA2157FN-X (IC601) : RF amp 1.Terminal layout 2.Block diagram PEAK 50 A BOTTOM PEAK 1.75k 240k 15pF x0.5 240k 15pF x0.5 180k 40pF RFGC (APC SW) (TE BAL) (AGC Gian) (TE BAL) VCTRLPIN Normal mode APC ON -50% +12dB...
  • Page 29 KD-SH707 3.Pin function TA2175FN-X Pin No. Symbol Function 3.3V power supply pin Main-beam amp input pin Main-beam amp input pin Sub-beam amp input pin Sub-beam amp input pin Monitor photo diode amp input pin Laser diode amp output pin APC circuit ON/OFF control signal, laser diode (LDO) control signal input or bottom/peak detection frequency change pin.
  • Page 30 KD-SH707 TC94A14FA (IC621) : DSP & DAC 1.Terminal layout & block daiagram Clock generator 1-bit Servo control Digital equalizer Address automatic circuit adjustment circuit Data CLV servo slicer 16 k Synchronous guarantee decoder Audio out Digital circuit output Micro- controller...
  • Page 31 KD-SH707 TC94A14FA Symbol Description EFM and PLCK phase difference signal output pin. TMAX TMAX detection result output pin. TMAX Detection Result TMAX Output Longer than fixed period "PV " Within fixed period "HiZ" Shorter than fixed period "AV " LPFN Inverted input pin for PLL LPF amp.
  • Page 32 KD-SH707 BR24C01AFV-W-X (IC502) : EEPROM 1.Pin layout 2.Block diagram 1kbit EEPROM ARRAY 8bit 7bit SLAVE/WORD ADDRESS DATA 7bit DECODER ADDRESS REGISTER REGISTER START STOP CONTROL LOGIC HIGH VOLTAGE GEN. Vcc LEVEL DETECT 3.Pin function Pin name Function Power supply Ground (0v)
  • Page 33 KD-SH707 BU4066BCFV-X (IC322) : Quad analog switch 1. Pin layout & Block diagram I/O4 O/I4 O/I3 I/O3 I/O1 O/I1 O/I2 I/O2 HN58X2416FPI-X (IC703) : EEPROM 1.Terminal layout 2.Block diagram Pin name Function Serial clock input Serial data input/output Write protect...
  • Page 34 KD-SH707 HA13164A(IC961) : Regulator 1.Terminal layout 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 2.Block diagram 100u 0.1u BATT.DET OUT ANT OUT Surge Protector 0.1u EXT OUT COMPOUT BIAS 0.1u VDD OUT ANT CTRL 0.1u...
  • Page 35 KD-SH707 HD74HCT126T-X (IC503) : Buffer 1.Terminal layout 3.Pin function INPUT OUTPUT H : High level L : Low level X : Irrelevant Off (Hhigh-impedance)state of a 3-stage output 2.Block diagram 1-35...
  • Page 36 KD-SH707 LA6579H-X (IC681) : 4-Channel bridge driver 1. Pin layout & Block diagram VIN1-A VIN1 VIN1_SW [H]: OP-AMP_A [L]: OP-AMP_B VIN1+A VIN1-B VCCP1 VIN1+B Signal system S-GND power supply VIN1-SW All outputs ON/OFF H : ON VO2+ MUTE MUTE L : OFF...
  • Page 37 KD-SH707 3.Pin function Pin No. Symbol Function CH1 input AMP_inverted input VIN1-A CH1 input AMP_non-inverted input VIN1+A CH1 and CH2 power stage power supply VCCP1 Output pin(+)for channel 1 VO1+ CH1 output pin (-) for channel 1 VO1- Output pin(+)for channel 2...
  • Page 38 KD-SH707 LC75878W (IC801,IC802) : LCD driver 1. Pin layout 100 ~ 76 26 ~ 50 2. Block diagram COMMON GENERAL SEGMENT DRIVER & LATCH DRIVER PORT CLOCK CONTROL GENERATOR REGISTER VLCD CONTRAST SHIFT REGISTER ADJUSTER VLCD0 VLCD1 VLCD2 INTERFACE VLCD3 VLCD4 3.
  • Page 39 KD-SH707 M62449FP-X (IC912) : Equalizer DATA MICON AVSS LATCH INTERFACE DVDD DGND OUT1 OUT2 F5R1 F5R2 F5O1 F5O2 F5I1 F5I2 F4R1 F4R2 F4O1 F4O2 F4I1 F4I2 F3R1 F3R2 F3O1 F3O2 F3I1 F3I2 F2R1 F2R2 F2O1 F2O2 F2I1 F2I2 F1R1 F1R2...
  • Page 40 KD-SH707 IC-PST9333U-X (IC702) : Regulator 1. Pin layout 2. Block diagram VOUT VOUT 3. Pin function Pin No. Symbol Function Non connect GND terminal VOUT Reset signal output terminal Vcc terminal/Voltage detect terminal NJM4565V-X (IC323,IC572) : Dual ope amp 1.Terminal layout & Pin function...
  • Page 41 KD-SH707 NJU7241F25-X (IC651) : Regulator 1. Pin layout & Block diagram Short current Protection Circuit NJU7241F33(IC504) : Voltage regulator PIN FUNCTION 1. GND 2. V 3. V 4. +NC 5. STB RPM6938-SV4 (IC861) : Remote sensor 1.Block diagram Comp Rout...
  • Page 42 KD-SH707 PCM1716E-X (IC571) : D/A converter 1. Pin layout 2. Block diagram Serial VoutL Low-pass Filter LBCK Input Mult-level EXTL 8X Oversampling DATA Delta-Sigma Digital Filter Low-pass VoutR Modulator Filter with ML/llS Function Controller EXTR MC/DM1 Mode MD/DM0 ZERO Control...
  • Page 43 KD-SH707 TB2901H(IC941) : Power amp 1.Terminal layout 2.Block diagram Vcc1 Vcc2 OUT1 0.22 F PW-GND1 OUT1 OUT2 0.22 F RW-GND2 OUT2 AC-GND OUT3 0.22 RW-GND3 OUT3 OUT4 0.22 PW-GND4 OUT4 PRE-GND STBY H-SW MUTE PLAY MUTE PRE-GND PW-GND 1-43...
  • Page 44 AD11 Interrupt General Flag SRAM I/F Timer Control Output Port AD12 I-Bus Address Calc. 2sets ERAM TESTP CROM 2k word XRAM YRAM 4k word 4k word 4k word VSSR Y-Pointer X-Pointer C-Pointer register register register Prog. VRAR Start X-Bus Switch Y-Bus register VSSP...
  • Page 45 KD-SH707 3.Pin function(1/2) TC94A02F-005 Pin No. Symbol Function Hard reset input terminal(H:Normal operation L: Reset) /RESET Micon I/F mode select input terminal MiMD External SRAM address output 0 terminal External SRAM address output 1 terminal Micon I/F data input/output terminal...
  • Page 46 KD-SH707 3.Pin function(2/2) TC94A02F-005 Pin No. Symbol Function External SRAM data input/output 4 terminal Digital power supply (2.5V) terminal External SRAM data input/output 5 terminal External SRAM data input/output 6 terminal External SRAM data input/output 7 terminal VSSP VCO GND...
  • Page 47 KD-SH707 TDA7404D-X (IC161) : Carradio signal processor 1.Termnal layout 2..Block diagram OUTLF Mono Fader DiffinL OUTRF Mono Fader Diffgnd DiffinR OUTLR Mono Fader OUTRR Mono Fader SE1L SE1R Mono Fader SE2L SE2R Mono Fader SE3L Zero cross SE3R Mono/Beep MONO+...
  • Page 48 KD-SH707 UPD784217AGC176 (IC701) : CPU 1. Pin layout 2. Pin function (1/2) Pin No. Symbol Function Non connect CD-MUTE CD MUTE CD-REST CD REST ANT REM Antenna remote output 5V connection Connect to X'tal for main clock Connect to X'tal for main clock...
  • Page 49 KD-SH707 2. Pin function (2/2) UPD784217AGC176 Pin No. Symbol Function EP-DAO Communication data input of 12C EPCLK Communication data input of 12C BUS-I/O J-BUS I/O switching output Panel close side motor control signal output Panel open side motor control signal output...
  • Page 50 KD-SH707 UPD784225GK-624 (IC501) : CPU 1.Pin layout 2.Pin function Symbol Function Symbol Function Connect to TEMP detecter Non use TEMP Connect to GND Non use Connect to GND Non use Connect to GND DAC mode control latch AVSS DACML No use...
  • Page 51 KD-SH707 W24L010AJ-12 (IC653) : SRAM 1. Pin layout 2. Block diaglam DECODER CORE ARRAY I/O1 CONTROL DATA I/O I/O8 I/O8 I/O7 I/O1 I/O6 I/O2 3. Pin function I/O5 I/O3 I/O4 SYMBOL DESCRIPTION A0 - A16 Address Input I/O1 - I/O8...
  • Page 52 KD-SH707 VICTOR COMPANY OF JAPAN, LIMITED MOBILE ELECTRONICS DIVISION PERSONAL & MOBILE NETWORK BUSINESS UNIT. 10-1,1Chome,Ohwatari-machi,Maebashi-city,371-8543,Japan 200203 (No.49699)

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