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JVC KD-SX9350 Service Manual

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SERVICE MANUAL
02
2003
49781
KD-SX9350,KD-SX990
1
Important Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
2
Disassembly method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
3
Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23
4
Description of major ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27
CD RECEIVER
ATT
SOUND
U
R
SOURCE
F
D
VOL
VOL
ATT
SOUND
U
R
SOURCE
F
D
VOL
VOL
Model
KD-SX9350
KD-SX990
TABLE OF CONTENTS
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LTD.
KD-SX9350
KD-SX990
Subwoofer cable
Provided
Not provided
KD-SX9350,KD-SX990
Area Suffix
J ----------- Northen America
No.49781
2003/02

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Summary of Contents for JVC KD-SX9350

  • Page 1 KD-SX9350,KD-SX990 SERVICE MANUAL CD RECEIVER 49781 2003 KD-SX9350,KD-SX990 Area Suffix J ----------- Northen America KD-SX9350 SOUND SOURCE KD-SX990 SOUND SOURCE Subwoofer cable Model KD-SX9350 Provided Not provided KD-SX990 TABLE OF CONTENTS Important Safety Precautions ............1-2 Disassembly method .

  • Page 2: Important Safety Precautions

    KD-SX9350,KD-SX990 SECTION 1 Important Safety Precautions 1.1 Safety Precautions 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 adjustment or operation check.
  • Page 3 KD-SX9350,KD-SX990 1.2 Preventing 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-SX9350,KD-SX990 SECTION 2 Disassembly method 2.1 Main body 2.1.1 Removing the front panel assembly (See Fig.1) (1) Push the detach button in the left right part of the front pan- Front panel assembly el and remove the front panel assembly in the direction of the arrow.
  • Page 5 KD-SX9350,KD-SX990 2.1.3 Removing the heat sink (See Fig.5) (1) Remove the two screws C and two screws D on the left side of the main body. Heat sink Fig.5 2.1.4 Removing the bottom cover (See Figs.6 and 7) • Prior to performing the following procedure, remove the front Joint c panel assembly, front chassis assembly and heat sink.
  • Page 6 KD-SX9350,KD-SX990 2.1.6 Removing the main board (See Fig.9) • Prior to performing the following procedure, remove the front CN101 Main board panel assembly, front chassis assembly, heat sink, bottom cover and rear bracket (1) Remove the two screws H attaching the main board.
  • Page 7 KD-SX9350,KD-SX990 2.1.9 Removing the front board (See Figs. 12 to 14) • Prior to performing the following procedure, remove the front panel assembly. (1) Remove the four screws L on the back side of the front panel assembly. (2) Release the nine joints g.
  • Page 8 KD-SX9350,KD-SX990 2.2 CD Mechanism section 2.2.1 Removing the top cover (See Figs.1 and 2) (1) Remove the two screws A on the both side of the body. (2) Lift the front side of the top cover and move the top cover backward to release the two joints a.
  • Page 9 KD-SX9350,KD-SX990 2.2.2 Removing the connector board Wires (See Figs.3 to 5) CAUTION: Before disconnecting the flexible wire from the pickup, solder the short-circuit point on the pickup. No observance of this in- struction may cause damage of the pickup. (1) Remove the screw B fixing the connector board.
  • Page 10 KD-SX9350,KD-SX990 2.2.3 Removing the DET switch (See Figs.6 and 7) (1) Extend the two tabs c of the feed sw. holder and pull out the switch. (2) Unsolder the DET switch wire if necessary. switch Connector board Pickup Fig.6 Tab c...
  • Page 11 KD-SX9350,KD-SX990 2.2.4 Removing the chassis unit (See Figs.8 and 9) • Prior to performing the following procedure, remove the top Chassis unit cover and connector board. Suspension spring (L) (1) Remove the two suspension springs (L) and (R) attaching Suspension spring (R) the chassis unit to the frame.
  • Page 12 KD-SX9350,KD-SX990 2.2.5 Removing the clamper assembly (See Figs.10 and 11) • Prior to performing the following procedure, remove the top cover. (1) Remove the clamper arm spring. Clamper arm (2) Move the clamper assembly in the direction of the arrow to spring release the two joints d.
  • Page 13 KD-SX9350,KD-SX990 2.2.6 Removing the loading / feed motor assembly (See Figs.12 and 13) • Prior to performing the following procedure, remove the top cover, connector board and chassis unit. (1) Remove the screw C and move the loading / feed motor as- sembly in the direction of the arrow to remove it from the chassis rivet assembly.
  • Page 14 KD-SX9350,KD-SX990 2.2.7 Removing the pickup unit Pickup unit (See Figs.14 to 18) • Prior to performing the following procedure, remove the top cover, connector board and chassis unit. (1) Remove the screw D and pull out the pu. shaft holder from the pu.
  • Page 15 KD-SX9350,KD-SX990 2.2.9 Removing the trigger arm Joint k (See Figs.19 and 20) • Prior to performing the following procedure, remove the top cover, connector board and clamper unit. (1) Turn the trigger arm in the direction of the arrow to release Trigger arm the joint k and pull out upward.
  • Page 16 KD-SX9350,KD-SX990 2.2.11 Removing the mode sw. / select lock arm Link plate Joint t (See Figs.22 and 23) Mode sw. • Prior to performing the following procedure, remove the top plate assembly. Select lock arm (1) Bring up the mode sw. to release from the link plate (joint t) and turn in the direction of the arrow to release the joint u.
  • Page 17 KD-SX9350,KD-SX990 2.2.12 Reassembling the mode sw. / select lock arm Select lock arm spring (See Figs.24 to 26) REFERENCE: Hook w Reverse the above removing procedure. (1) Reattach the select lock arm spring to the top plate and set Joint v...
  • Page 18 KD-SX9350,KD-SX990 2.2.13 Removing the select arm R / link plate Link plate Joint r Joint c' (See Figs.27 and 28) Joint b' • Prior to performing the following procedure, remove the top Select arm R plate assembly. (1) Bring up the select arm R to release from the link plate...
  • Page 19 KD-SX9350,KD-SX990 2.2.15 Removing the loading roller assembly (See Figs.31 to 33) Loading roller assembly • Prior to performing the following procedure, remove the Roller guide clamper assembly and top plate assembly. spring (1) Push inward the loading roller assembly on the gear side and detach it upward from the slot of the joint g' of the lock arm rivet assembly.
  • Page 20 KD-SX9350,KD-SX990 2.2.16 Removing the loading gear 5, 6 and 7 (See Figs.35 and 36) Loading gear bracket • Prior to performing the following procedure, remove the top cover, chassis unit, pickup unit and top plate assembly. Loading gear 6 (1) Remove the screw K attaching the loading gear bracket.
  • Page 21 KD-SX9350,KD-SX990 2.2.17 Removing the gears Joint p' (See Figs.37 to 40) • Prior to performing the following procedure, remove the top Change plate cover, chassis unit, top plate assembly and pickup unit. rivet assembly • Pull out the loading gear 3. (See Fig.35.) (1) Pull out the feed gear.
  • Page 22 KD-SX9350,KD-SX990 2.2.18 Removing the turn table / spindle motor Turn table (See Figs.41 and 42) • Prior to performing the following procedure, remove the top cover, connector board, chassis unit and clamper assembly. (1) Remove the two screws L attaching the spindle motor as- sembly through the slot of the turn table on top of the body.

  • Page 23: Adjustment

    6. Digital tester FM 87.5MHz ~ 107.9MHz 7. Tracking offset meter AM 530kHz ~ 1710 kHz 8. Test Disc JVC :CTS-1000 9. Extension cable for check EXTSH002-22P × 1 Dummy load Exclusive dummy load should be used for AM,and FM. For FM dummy load, there is a loss of 6dB between SSG output and antenna input.
  • Page 24 KD-SX9350,KD-SX990 3.2 Flow of functional operation unit TOC read Power ON Set Function CD When the laser diode correctly When the pickup correctly moves emits to the inner area of the disc Microprocessor $82 $81 Disc inserted Microprocessor commands commands 3.3V...
  • Page 25 KD-SX9350,KD-SX990 3.3 Troubleshooting 3.3.1 Feed section Is the wiring for IC521 Is the voltage output at Is 3.3V present at IC561 Check CD 8V IC521 pin "40" 5V or 0V? (56) ~ (64) correct? pin "20" ? and 5V. Check the vicinity of IC521.
  • Page 26 KD-SX9350,KD-SX990 3.4 Maintenance of laser pickup 3.5 Replacement of laser pickup (1) Cleaning the pick up lens Before you replace the pick up, please try to clean the lens Turn off the power switch and, disconnect the power cord. with a alcohol soaked cotton swab.

  • Page 27: Description Of Major Ics

    KD-SX9350,KD-SX990 SECTION 4 Description of major ICs 4.1 BA3220FV-X (IC361,IC381) : Line out amp • Pin layout 3220 • Block diagram OUTL OUTR RGND LGND REFR REFL FILTER (No.49781)1-27...
  • Page 28 KD-SX9350,KD-SX990 4.2 BR24C01AFV-W-X (IC502) : EEPROM • Pin layout • Block diagram 1kbit EEPROM ARRAY 8bit 7bit ADDRESS SLAVE/WORD DATA 7bit DECODER ADDRESS REGISTER REGISTER START STOP CONTROL LOGIC HIGH VOLTAGE GEN. Vcc LEVEL DETECT • Pin function Pin name...
  • Page 29 KD-SX9350,KD-SX990 4.3 BR24C16F-X (IC771) : EEPROM • Pin layout • Pin function Symbol Function Power supply. A0, A1, A2 No use connect to GND. Serial clock input. Serial data I/O of slave and ward address. Write protect terminal. • Block diagram...
  • Page 30 KD-SX9350,KD-SX990 4.5 HA13164A (IC901) : Regulator • Terminal layout 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 • Block diagram 100u 0.1u BATT.DET OUT ANT OUT Surge Protector 0.1u EXT OUT COMPOUT BIAS 0.1u...
  • Page 31 KD-SX9350,KD-SX990 4.6 HD74HC126FP-X (IC801) : Buffer • Pin layout • Pin function Input Output Note: H:High level L:Low level X:Irrelevant Z:Off(High-impedance) State a 3-state input • Block diagram Output Input Output Sample as Load Circuit 1 Output Sample as Load Circuit 1...
  • Page 32 KD-SX9350,KD-SX990 4.7 HD74HCT126T-X : (IC503) Buffer • Pin layout • Pin function Input Output H : High level L : Low level X : Irrelevant Z : Off (Hhigh-impedance)state of a 3-stage output • Block diagram 1-32 (No.49781)
  • Page 33 KD-SX9350,KD-SX990 4.8 LC75873NW(IC601):LCD Driver • Pin layout • Block diagram VDD1 COMON SEGMENT DRIVER DRIVER VDD2 CLOCK SHIFT REGISTOR GENERATOR ADDRESS DETECTOR • Pin function Pin No. Pin name Description 79,80 S1/P1 to S4/P4 O Segment outouts for displaying the display data transferred by serial data input.
  • Page 34 KD-SX9350,KD-SX990 4.9 LA47505 (IC301) : Power amp. • Pin layout Protective circuit Stand by Switch Ripple Mute Filter circuit protective circuit Muting & On Time Control Circuit 1-34 (No.49781)
  • Page 35 KD-SX9350,KD-SX990 • Pin layout • Pin function Pin No. Symbol Function AC CONT1 Header of IC GND1 Power GND OUTFR- Outpur(-) for front Rch STBY Stand by input OUTFR+ Output (+) for front Rch Vcc1/2 Power input OUTRR- Output (-) for rear Rch...
  • Page 36 KD-SX9350,KD-SX990 4.10 LA6579H-X (IC681) : 4-Channel bridge driver • 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...
  • Page 37 KD-SX9350,KD-SX990 • Pin function Pin No. Symbol Function VIN1-A CH1 input AMP_inverted input VIN1+A CH1 input AMP_non-inverted input VCCP1 CH1 and CH2 power stage power supply VO1+ Output pin(+)for channel 1 VO1- CH1 output pin (-) for channel 1 VO2+...
  • Page 38 KD-SX9350,KD-SX990 4.11 LP61L1024S-12-X (IC653) : SRAM • Pin layout • Block diagram DECODER CORE ARRAY I/O1 CONTROL DATA I/O I/O8 I/O8 • Pin function I/O7 I/O1 I/O6 I/O2 SYMBOL DESCRIPTION I/O5 I/O3 A0 - A16 Address Input I/O4 I/O1 - I/O8...
  • Page 39 KD-SX9350,KD-SX990 4.13 NJM4565V-X (IC572) : Dual ope amp • Pin layout & Block diagram AOUTPUT A-INPUT A+INPUT B+INPUT B-INPUT B OUTPUT 4.14 NJU7241F25-X (IC651) : Regulator • Pin layout GND 1 5 STB VIN 2 VOUT 3 4 NC • Block diagram...
  • Page 40 KD-SX9350,KD-SX990 4.16 PCM1716E-X (IC571) : D/A converter • Pin layout • Block diagram Serial VoutL Low-pass Filter Input LBCK 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...
  • Page 41 KD-SX9350,KD-SX990 4.17 RPM6938-SV4 (IC602) : Remote control receiver • Pin layout & Block diagram Comp Detector conversion trimming circuit magnetic shield 4.18 TDA7404D-X(IC161):Carradio signal processor • Pin layout • Block diagram Mono Fader Mono Fader Mono Fader Mono Fader Mono Fader...
  • Page 42 KD-SX9350,KD-SX990 4.19 TA2157FN-X(IC601):RF amp • Pin layout • 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 43 KD-SX9350,KD-SX990 • Pin function 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 44 KD-SX9350,KD-SX990 4.20 TC94A02F-005(IC652) : DSP • Pin layout & Block diagram AD10 VDDT LRCKiA BCKiA SDi0 AD13 VDDT AD14 /MiCK AD16 MiDio AD15 MiMD /RESET Timing Generator General Input Port 1-44 (No.49781)
  • Page 45 KD-SX9350,KD-SX990 • Pin function Pin No. Symbol Description Pin No. Symbol Description External SRAM write signal /RESET Hard reset input terminal(H:Normal op- AD16 External SRAM address output 16 ter- eration L: Reset) minal MiMD Micon I/F mode select input terminal...
  • Page 46 KD-SX9350,KD-SX990 4.21 TC94A14FA (IC621) : DSP & DAC • Pin 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...
  • Page 47 KD-SX9350,KD-SX990 Symbol I/O Descroption TMAX O TMAX detection result output pin. TMAX Detection Result TMAX Output Longer than fixed period "PVDD3" Within fixed period "HiZ" Shorter than fixed period "AVSS3" LPFN I Inverted input pin for PLL LPF amp. LPFO O Output pin for PLL LPF amp.
  • Page 48 KD-SX9350,KD-SX990 4.22 UPD784215AGC199 (IC701): Main micon • Pin layout 100 ~ 76 26 ~ 50 • Pin function Pin No. Symbol Function CD RESET Reset output for CD sub-micon CD MUTING Muting request of CD sub-micon No use ANT CONT...
  • Page 49 KD-SX9350,KD-SX990 Pin No. Symbol Function E2PROM-DO I2C data output E2PROM-CLK I2C clock output OPEN Door open switch 49~52 No use SD/ST Station detector or stereo indicator input No use MONO Monaural selection output H:Monaural 56~60 No use DETACH Detach detect input H:Detach...
  • Page 50 Chip enable output for LCD driver LCD DA Data output for LCD driver LCD CK Clock outout for LCD driver BUS I/O JVC BUS input/output control terminal (negative) BUS I/O JVC BUS input/output control terminal BUS SI JVC BUS data input terminal BUS SO...
  • Page 51 CD mechanism SW1 input terminal B.DET Backup power supply detection input terminal (H:Stop mode) P.DET Main power off detection input terminal (H:HALT mode) BUS INT JVC BUS communication start interrupt input terminal MP3 REQ CD MP3 request signal input terminal VSS0 VDD1 3.3V...
  • Page 52 KD-SX9350,KD-SX990 4.24 TB2118F-X (IC31) : PLL • Pin Layout • Block diagram Constant power supply voltage Buff. ON/OFF AM CP. Phase OSC circuit Reference Counter Comparator switch FM VCO 4-bit Prescaler Swallow counter 12-bit AMVCO Programmable counter 20-bit BINARY COUNTER...
  • Page 53 KD-SX9350,KD-SX990 (No.49781)1-53...
  • Page 54 KD-SX9350,KD-SX990 VICTOR COMPANY OF JAPAN, LIMITED AV & MULTIMEDIA COMPANY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan (No.49781) Printed in Japan 200302WPC...

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