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JVC KD-LH1105 Service Manual
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JVC KD-LH1105 Service Manual

JVC KD-LH1105 Service Manual

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SERVICE MANUAL
04
2003
49827
1
Important Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
2
Disassembly method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
3
Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23
4
Description of major ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27
CD RECEIVER
KD-LH1105
TABLE OF CONTENTS
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LTD.
Area Suffix
U ----------- Otherr Areas
KD-LH1105
No.49827
2003/04

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Summary of Contents for JVC KD-LH1105

  • Page 1 KD-LH1105 SERVICE MANUAL CD RECEIVER 49827 2003 KD-LH1105 Area Suffix U ----------- Otherr Areas TABLE OF CONTENTS Important Safety Precautions ............1-2 Disassembly method .

  • Page 2: Important Safety Precautions

    KD-LH1105 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-LH1105 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-LH1105 SECTION 2 Disassembly method 2.1 Main body 2.1.1 Removing the front panel assembly Front panel assembly (See Fig.1) (1) Push the detach button in the lower left part of the front panel assembly and remove the front panel assembly in the direction of the arrow.
  • Page 5 KD-LH1105 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 procedures, remove the front Joints d panel assembly, front chassis assembly and heat sink.
  • Page 6 KD-LH1105 2.1.5 Removing the rear bracket (See Fig.8) Rear bracket • Prior to performing the following procedures, remove the front panel assembly, front chassis assembly, heat sink and bottom cover. (1) Remove the three screws E, three screws F and three screws G on the back side of the main body.

  • Page 7: Release The Eight Joints G Attaching The Rear Cover. (See Fig

    KD-LH1105 2.1.8 Removing the front board (See Figs. 11 to 13) • Prior to performing the following procedures, remove the front panel assembly. (1) Remove the five screws K on the back side of the front pan- el assembly. (See Fig.11.) (2) Release the eight joints g attaching the rear cover.
  • Page 8 KD-LH1105 2.2 CD Mechanism Assembly 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-LH1105 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-LH1105 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. DET switch Connector board Pickup Fig.6...
  • Page 11 KD-LH1105 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) Suspension spring (R) (1) Remove the two suspension springs (L) and (R) attaching the chassis unit to the frame.
  • Page 12 KD-LH1105 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 spring (2) Move the clamper assembly in the direction of the arrow to release the two joints d.
  • Page 13 KD-LH1105 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 assembly in the direction of the arrow to remove it from the chassis rivet assembly.
  • Page 14 KD-LH1105 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-LH1105 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-LH1105 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-LH1105 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. Joint v (1) Reattach the select lock arm spring to the top plate and set...
  • Page 18 KD-LH1105 2.2.13 Removing the select arm R / link plate Joint c' Link plate Joint r (See Figs.27 and 28) Select arm R Joint b' • Prior to performing the following procedure, remove the top plate assembly. (1) Bring up the select arm R to release from the link plate...
  • Page 19 KD-LH1105 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-LH1105 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-LH1105 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-LH1105 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 to 108.0MHz 7. Tracking offset meter AM 531kHz to 1602 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.The loss of 6dB need not be considered...
  • Page 24 KD-LH1105 3.2 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 Disc inserted Microprocessor commands commands 3.3V...
  • Page 25 KD-LH1105 3.2.1 Feed section Is the voltage output at Is the wiring for IC681 Is 3.3V present at IC681 IC621 pin "40" 5V or 0V? pin 27? pin "20"? Check CD 8V Check the vicinity of and 5V. IC621. Is 4V present at both...
  • Page 26 KD-LH1105 3.3 Maintenance of laser pickup 3.4 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-LH1105 SECTION 4 Description of major ICs 4.1 BR24C16F-X (IC703) : 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.
  • Page 28 KD-LH1105 4.2 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 29 KD-LH1105 4.3 IC-PST3424U-X (IC803) : Reset • Pin layout VOUT • Block diagram VOUT Vref • Pin function Pin Name Function Vout Reset Signal Output PIN VDD PIN / Voltage Detect PIN Non connect VSS PIN 4.4 IC-PST9333U-X (IC702) : Regulator •...
  • Page 30 KD-LH1105 4.5 LA47505 (IC951) : Power amp. • Terminal layout Protective circuit Stand by Switch Ripple Mute Filter circuit protective circuit Muting & On Time Control Circuit 1-30 (No.49827)
  • Page 31 KD-LH1105 • Terminal 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 32 KD-LH1105 4.6 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 33 KD-LH1105 • 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 34 KD-LH1105 4.7 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...
  • Page 35 KD-LH1105 4.8 HD74HC126FP-X (IC781) : 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 36 KD-LH1105 4.9 MN102H60KCH (IC801) : LCD display sub CPU • Pin Layout • Pin function Pin No. Symbol Function LCD reset output Read enable output for extension memory Write enable output for extension memory VccWCNT Writing voltage control for external ROM...
  • Page 37 KD-LH1105 Pin No. Symbol Function Not use VOL1 Rotary encoder input 1 VOL2 Rotary encoder input 2 Not use AGND Analog ground 62 to 65 KEY0 to KEY3 Key 0 to 3 input AD terminal Power supply SWLED0 SW_LED flashing output 0 for [VOL] key LED...
  • Page 38 KD-LH1105 4.10 MX23L8103-90-M2 (IC802) : ROM • Pin Layout BYTE# D15/A-1 MX23L8103 (Normal Type) • Pin function Pin No. Name Function Pin No. Name Function Data output 1 to 8 A15 to A8 Address inputs Power supply 9 to 15...
  • Page 39 KD-LH1105 4.11 NJM2360AM-X (IC921) : DC-DC convertor • Pin layout 1. Cs 2. Es 3. C 4. GND 5. INV 6. Vcc 7. S 8. C • Block diagram Switch Driver collector collector Switch Ipk sense emitter Timing capacitor COMP Comparator 1.25V...
  • Page 40 KD-LH1105 4.14 TA2157FN-X (IC601):RF amp • Terminal 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%...
  • Page 41 KD-LH1105 • 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 42 KD-LH1105 4.15 TC94A14FA (IC621) : DSP & DAC • 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...
  • Page 43 KD-LH1105 Symbol I/O Descroption TMAX O 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 I Inverted input pin for PLL LPF amp.
  • Page 44 KD-LH1105 4.16 UPD784217AGC204 (IC701) : CPU • Pin Layout • Pin function Pin No Symbol Function Not use Not use, SW2 (1100series) Not use, PSW (1100series) Not use, LM (1100series) Not use, MOTOR SEL (1100series) Not use ANT CONT Antenna remote control...
  • Page 45 KD-LH1105 Pin No Symbol Function E2PROM-DO I2C data output E2PROM-CLK I2C clock output OPEN DOOR OPEN SW DETACH Detach detect input; H means detaching Output L 51 to 53 Not use EQ-CLK Clock output for e-EQ IC EQ-DA Data output for e-EQ IC...
  • Page 46 KD-LH1105 4.17 RPM6938-SV4 (IC805) : Remote sensor • Pin diagram • Block diagram Comp Rout Detector conversion trimming circuit magnetic shield 4.18 TDA7404D-X (IC911):Carradio signal processor • Terminal layout • Block diagram Mono Fader Mono Fader Mono Fader Mono Fader...
  • Page 47 KD-LH1105 (No.49827)1-47...
  • Page 48 KD-LH1105 VICTOR COMPANY OF JAPAN, LIMITED AV & MULTIMEDIA COMPANY MOBILE ENTERTAINMENT CATEGORY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan (No.49827) Printed in Japan 200304WPC...