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JVC KD-LH3105 Service Manual

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SERVICE MANUAL
5
2003
49839
1
Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
Disassembly method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3
Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4
Description of major ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
CD RECEIVER
KD-LH3105
TABLE OF CONTENTS
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LTD.
Area Suffix
U ------- Other Areas
No.49839
2003/5

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  • Page 1 SERVICE MANUAL CD RECEIVER 49839 2003 KD-LH3105 Area Suffix U ------- Other Areas TABLE OF CONTENTS Precautions ................3 Disassembly method .
  • Page 2 SPECIFICATION AUDIO AMPLIFIER Maximum Power Output Front 50 W per channel SECTION Rear 50 W per channel 19 W per channel into 4 Ω, 40 Hz Continuous Power Front Output (RMS) to 20 000 Hz at no more than 0.8% total harmonic distortion. 19 W per channel into 4 Ω, 40 Hz Rear to 20 000 Hz at no more than...

  • Page 3: Precautions

    SECTION 1 Precautions 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 4: Disassembly Method

    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. 1.2.1 Grounding to prevent damage by static electricity Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as CD players.
  • Page 5 SECTION 2 Disassembly method 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. Detach button Fig.1 2.1.2 Removing the bottom cover (See Fig.2)
  • Page 6 2.1.3 Removing the front chassis assembly Joint d Joint e (See Figs.3 and 4) • Prior to performing the following procedures, remove the front panel assembly and bottom cover. (1) Remove the two screws A on the both sides of the main body.
  • Page 7 2.1.6 Removing the main board (See Fig.7) • Prior to performing the following procedures, remove the front Main board CN601 panel assembly, bottom cover, front chassis assembly, heat sink and rear bracket. (1) Remove the two screws H attaching the main board. (2) Disconnect the connector CN601 and remove the main board in an upward direction.
  • Page 8 2.1.9 Removing the front board (See Figs.10 to 12) Front panel assembly • Prior to performing the following procedures, remove the front panel assembly. (1) Remove the five screws L attaching the rear cover on the back side of the front panel assembly. (See Fig.10.) (2) Release the eight joints g, remove the rear cover from the front panel assembly.
  • Page 9 2.2 CD Mechanism section 2.2.1 Removing the top cover (See Figs.1 and 2) (1) Remove the four 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 10 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. (2) Solder the short-circuit point on the pickup.
  • Page 11 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 DET switch DET switch wire Tab c...
  • Page 12 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 13 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 14 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 15 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 16 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 17 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 18 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 Joint v the shorter end of the select lock arm spring to the hook w on the top plate.
  • Page 19 2.2.13 Removing the select arm R / link plate Link plate Joint r Joint c' (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 (joint a') and turn as shown in the figure to release the two Joint b' joints b' and joint c'.
  • Page 20 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 21 2.2.16 Removing the loading gear 5, 6 and 7 Loading gear bracket (See Figs.35 and 36) • Prior to performing the following procedure, remove the top Loading gear 6 cover, chassis unit, pickup unit and top plate assembly. (1) Remove the screw K attaching the loading gear bracket. The loading gear 6 and 7 come off the loading gear brack- (2) Pull out the loading gear 5.
  • Page 22 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 23 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 24 (5) Electric voltmeter Frequency Band (6) Digital tester 87.5MHz to 107.9MHz (7) Tracking offset meter (8) Test Disc JVC :CTS-1000 (with channel interval set to 200kHz) (9) Extension cable for check 87.5MHz to 108.0MHz EXTSH002-22P × 1 (with channel interval set to 50kHz)
  • Page 25 Troubleshooting Feed section Is the voltage output at Is the wiring for IC621 Is 3.3V present at IC681 IC621 pin "40" 5V or 0V? pin "40"? pin "6"? Check CD 8V Check the vicinity of and 5V. IC621. Is 4V present at both Check the feed motor Is 6V or 2V present at sides of the feed motor?
  • Page 26 Flow of functional operation unit TOC read Power ON When the laser diode correctly When the pickup correctly moves Set Function CD emits to the inner area of the disc Microprocessor $82 $81 Microprocessor commands Disc inserted commands 3.3V 3.3V Hi-Z TC94A14FA "38"...
  • Page 27 Maintenance of laser pickup 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 from the ac outlet. with a alcohol soaked cotton swab. (2) Life of the laser diode When the life of the laser diode has expired, the following symptoms will appear.

  • Page 28: Description Of Major Ics

    SECTION 4 Description of major ICs BA3220FV-X (IC301,IC281) : Line out amp • Pin layout 3220 • Block diagram OUTL OUTR RGND LGND REFR REFL FILTER 1-28 (No.49839)
  • Page 29 BA5830FP-X (IC681) : Power driver • Pin Layout BIAS LD/SLED Pre Vcc CONTROL Vcc2 1.65V Level shifter Level shifter T.S.D Level shifter Level shifter MUTE Vcc1 2.4V CONTROL PreGND T.S.D : thermal shutdown Unit of resistance : [ ] • Pin function Pin No.
  • Page 30 4.3 BR24L16F-W-X (IC703) : EEPROM • Pin layout • Pin function Symbol Function Power supply. A0,A1,A2 No use connect to GND. Serial clock input. I/O Serial data I/O of slave and ward address. Write protect terminal. • Block diagram 16kbit EEPROM allay 8bit 11bit Address...
  • Page 31 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 VDD OUT ANT CTRL 0.1u CTRL...
  • Page 32 4.6 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 Output Sample as Load Circuit 1 Note:...
  • Page 33 4.7 HD74HCT126T-X : (IC503) Buffer • Pin arrangement • Pin function Input Output H : High level L : Low level X : Irrelevant Z : Off (Hhigh-impedance)state of a 3-stage output • Block diagram (No.49839)1-33...
  • Page 34 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 4.9 IC-PST9333U-X (IC702) : Regulator • Pin layout •...
  • Page 35 4.10 RPM6938-SV4 (IC805) : Remote control receiver • Pin diagram • Block diagram Comp Rout Detector conversion trimming circuit magnetic shield 4.11 TDA7404D-X (IC911):Car radio signal processor • Terminal layout • Block diagram Mono Fader Mono Fader Mono Fader Mono Fader Mono Fader Mono Fader Zero Cross...
  • Page 36 4.12 LH28F160BJHET92 (IC802) : 16M flash memory • Pin Layout BYTE# 48-LEAD TSOP STANDARD PINOUT 12mm x 20mm TOP VIEW RY/BY# • Block Diagram to DQ Output Input buffer buffer I/O logic ID code BYTE# register Command Status user register interface Data comparator...
  • Page 37 • Pin function Pin No. Symbol Function Pin No. Symbol Function I/O Data input/output 1 to 8 A15 to A8 Address input for memory address DQ10 I/O Data input/output Address input for memory address I/O Data input/output Non connection DQ11 I/O Data input/output Write enable Power supply...
  • Page 38 4.13 MN102H60KCG (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 RY/BY Read/Busy input for extension memory Chip select1 output for extension memory...
  • Page 39 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 SWLED1 SW_LED flashing output 1 for [SEL] key LED SWLED2...
  • Page 40 4.14 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 F1O1 F1O2 AVSS...
  • Page 41 4.15 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 reversal input 4.16 NJM4565V-X (IC132, IC572) : Dual ope amp...
  • Page 42 4.17 NJU7241F25-X (IC651) : Regulator • Pin layout GND 1 5 STB VIN 2 VOUT 3 4 NC • Block diagram Short protect VIN 2 3 VOUT STB 5 Vref GND 1 1 GND 4.18 NJU7241F33-X (IC504, IC804) : Voltage regulator PIN FUNCTION 1.
  • Page 43 4.19 PCM1716E-X (IC571) : D/A converter • Pin layout • 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 CS/WO BPZ-Cont Open drain...
  • Page 44 4.20 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% +12dB (0dB) Normal mode APC ON...
  • Page 45 • 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 46 4.21 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 Micro- controller Sub code interface...
  • Page 47 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. LPFO O Output pin for PLL LPF amp.
  • Page 48 4.22 TC94A20F-008 (IC652) : Audio digital processor with DAC and SRAM • Pin layout & Block diagram Po2/A5 BCKiB/A1 Po3/A6 SDi1/A0 VDDT LRCKiA Po4/A7 BCKiA Po5/A8 SDi0 Po6/A9 LRCKo BCKo IRQ/REQ/A10R VDDT VDDM(SRAM) MiACK/A11R Fi0/ /OE /MiCK/SCL Fi1/ /CAS MiDiO/SDA VSSM(SRAM) /MiLP/ /RAS Pi0/io0...
  • Page 49 • Pin function Pin No. Symbol Function /RESET Hard reset input (H:Operation L: Reset) MiMD Mode select input for MCU interface (H:IIC L:Serial) /MiCS Chip select input for MCU interface Write-enable for external DRAM /MiLP Latch pulse input for MCU interface /RAS Low address strobe for external DRAM MiDio...
  • Page 50 Data to LCD driver (Not connect) LCDCK Clock to LCD driver (Not connect) BUSS0 JVC BUS data BUSSI JVC BUS data BUSSCK I/O JVC BUS clock Pull up to 3.3V DVCC Connect to 3.3V Crystal oscillator (24.576MHz) DVSS Connect to ground Crystal oscillator (24.576MHz) Pull up to 3.3V...
  • Page 51 LCD/AD key/Remocon invalidity selection (L) RWSEL CD-RW switching (RW:L) LD/FE LOADING/FEED switching (H:LD,L:FE) LOAD Loading (L:Loading,H:Eject) /BUSIO JVC BUS input/output control (Inverting output) BUSIO JVC BUS input/output control Not connect DVSS Connect to ground Connect to P.DET DVCC Connect to 3.3V...
  • Page 52 4.24 UPD784217AGC205 (IC701) : CPU • Pin Layout • Pin function Pin No Symbol Function 1 to 7 Not use ANT CONT Antenna remote control Power supply Ground RESET System reset REMOCON Remocon input BUS-INT J-BUS INT Power save2, H means STOP mode CD-REQ CD REQ INPUT RDS-SCK...
  • Page 53 Pin No Symbol Function DETACH Detach detect input; H means detaching Not use 51 to 53 Not use EQ-CLK Clock output for e-EQ IC EQ-DA Data output for e-EQ IC EQ-LA Latch output for e-EQ IC 57 to 59 Not use RDS DA Not use SD/ST...
  • Page 54 VICTOR COMPANY OF JAPAN, LIMITED AV & MULTIMEDIA COMPANY MOBILE ENTERTAINMENT CATEGORY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan (No.49839) Printed in Japan...

  • Page 55: Parts List

    KD-LH3105 PARTS LIST [ KD-LH3105 ] * All printed circuit boards and its assemblies are not available as service parts. Area suffix U --------------------- Other Areas - Contents - Exploded view of general assembly and parts list (Block No.M1) CD mechanism assembly and parts list (Block No.MB) Electrical parts list (Block No.01~03)
  • Page 56 KD-LH3105 Exploded view of general assembly and parts list Block No.
  • Page 57 KD-LH3105 General assembly Block No. [M][1][M][M] Symbol No.Part No. Part Name Description Local Symbol No.Part No. Part Name Description Local GE30912-006A REAR BRACKET QYSDST2606Z SCREW 2.6mm x 6mm ------------ CD MECHA QYSDST2606Z SCREW 2.6mm x 6mm GE10043-210A TOP CHASSIS QYSDST2606Z SCREW 2.6mm x 6mm...
  • Page 58 KD-LH3105 CD mechanism assembly and parts list Block No. Grease TNG-87 TN-2001-1013 GP-501MK CFD-005Z GP-501A...

  • Page 59: Loading Gear

    KD-LH3105 CD mechanism Block No. [M][B][M][M] Symbol No.Part No. Part Name Description Local 30320101T FRAME 30320102T TOP COVER 30320115T DANPER F (x2) 30320116T DANPER R 303205505T CHASSIS RIVET 303205503T CHANGE P. RVT A 303205301T CLAMPER ASSY 303205304T SPINDLE MOTOR A...

  • Page 60: Electrical Parts List

    KD-LH3105 Electrical parts list Main board Block No. [0][1][0][0] Symbol No.Part No. Part Name Description Local Symbol No.Part No. Part Name Description Local D941 UDZS11B-X Z DIODE D942 1SS355-X SI DIODE IC131 BU4066BCFV-X D951 1SS355-X SI DIODE IC132 NJM4565V-X IC281...
  • Page 61 KD-LH3105 Symbol No.Part No. Symbol No.Part No. Part Name Description Local Part Name Description Local C267 NCB31HK-472X C CAPACITOR 4700pF 50V K C924 NCB31EK-473X C CAPACITOR 0.047uF 25V K C268 NCB31HK-682X C CAPACITOR 6800pF 50V K C929 NCB31CK-473X C CAPACITOR 0.047uF 16V K...
  • Page 62 KD-LH3105 Symbol No.Part No. Symbol No.Part No. Part Name Description Local Part Name Description Local R182 NRSA63J-0R0X MG RESISTOR 0Ω 1/16W J R751 NRSA63J-0R0X MG RESISTOR 0Ω 1/16W J R183 NRSA63J-0R0X MG RESISTOR 0Ω 1/16W J R754 NRSA63J-331X MG RESISTOR 330Ω...

  • Page 63: Front Board

    KD-LH3105 Symbol No.Part No.  Symbol No. Part No. Part Name Description Local Part Name Description Local R992 NRSA63J-0R0X MG RESISTOR 0Ω 1/16W J D401 MA152WK-X DIODE R993 NRSA63J-0R0X MG RESISTOR 0Ω 1/16W J D402 SML-310LT/MN/-X R996 NRSA63J-223X MG RESISTOR 22kΩ...
  • Page 64 KD-LH3105  Symbol No. Part No.  Symbol No. Part No. Part Name Description Local Part Name Description Local C824 NCB31EK-473X C CAPACITOR 0.047uF 25V K R807 NRSA63J-473X MG RESISTOR 47kΩ 1/16W J C825 NBE20JM-106X TA E CAPACITOR 10uF 6.3V M...

  • Page 65: Sub Board

    KD-LH3105  Symbol No. Part No.  Symbol No. Part No. Part Name Description Local Part Name Description Local R888 NRSA63J-561X MG RESISTOR 560Ω 1/16W J C506 NCB31HK-103X C CAPACITOR 0.01uF 50V K R889 NRSA63J-821X MG RESISTOR 820Ω 1/16W J...
  • Page 66 KD-LH3105  Symbol No. Part No.  Symbol No. Part No. Part Name Description Local Part Name Description Local C646 NCB31HK-103X C CAPACITOR 0.01uF 50V K R554 NRSA63J-333X MG RESISTOR 33kΩ 1/16W J C651 NEAD0JM-476X E CAPACITOR 47uF 6.3V M...
  • Page 67 KD-LH3105  Symbol No. Part No. Part Name Description Local R685 NRSA63J-682X MG RESISTOR 6.8kΩ 1/16W J R686 NRSA63J-123X MG RESISTOR 12kΩ 1/16W J R687 NRSA63J-682X MG RESISTOR 6.8kΩ 1/16W J R688 NRSA63J-102X MG RESISTOR 1kΩ 1/16W J R689 NRSA63J-123X MG RESISTOR 12kΩ...
  • Page 68 KD-LH3105 Packing materials and accessories parts list Block No. P2 A2 A3 A4 A5 A6 A7 A8 A9 A10A11A12 3-14...
  • Page 69 KD-LH3105 Packing and accessories Block No. [M][3][M][M]  Symbol No. Part No. Part Name Description Local GET0149-001A INST BOOK ENG ARA CHI THA GET0149-002A INST BOOK GET0149-003A INSTALL MANUAL ENG ARA CHI THA GET0149-004A INSTALL MANUAL GET0165-003A DEMO MODE SHEET...

  • Page 70: No.49839)1

    KD-LH3105 SCHEMATIC DIAGRAMS CD RECEIVER KD-LH3105 Area Suffix U ------------------- Other Areas K D-LH3105 Contents Block diagram Standard schematic diagrams Printed circuit boards 2-5,6 No.49839SCH COPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LTD. 2003/05...

  • Page 71: Safety Precaution

    KD-LH3105 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 72: Block Diagram

    KD-LH3105 Block diagram J121 TU.L FRONT VA,VB VOUTL CD.L-CH TU.R LINE OUT VE,VF FM/AM VOUTR IC572 CD.R-CH IC601 MD,LD IC571 RWSEL,IOP TUNER CD LPF REAR CD RF 24bit DAC LINE OUT OUT FL CD-L OUT RL CD-R DACML OUT FR...

  • Page 73: Standard Schematic Diagrams

    KD-LH3105 KD-LH3105 Standard schematic diagrams Main amplifier section QNN0490-001 R121 R123 J121 R122 R124 CN141 IC912 R221 QGA2006F1-04 M62449FP-X Q121 Q122 R222 2SD1781K 2SD1781K R161 R261 C917 Q131 2SD1781K Q221 100p 0.047 Q222 2SD1781K C161 C261 UN2211 C352 2.2/50 LPF2...
  • Page 74 KD-LH3105 CD servo control section RWSEL R585 C585 C587 C589 R613 R581 R583 C611 CD.L-CH 120p 4.7/35 4.7/35 R614 R612 R611 R610 C610 C586 C588 C590 R582 R584 CD.R-CH X571 120p 4.7/35 4.7/35 Q571 R586 ON5V UN2111 R601 R602 Q572...
  • Page 75 KD-LH3105 KD-LH3105 LCD & Key control section D453 NSCM315C D452 NSCM315C D451 NSCM315C R845 R844 R830 R881 R880 R879 R878 R843 1.5k R829 KEY0 R842 1.5k C809 4.7/6.3 R841 1.5k C808 4.7/6.3 C807 4.7/6.3 CN801 NNZ0087-001 S806 S805 S804 S803...
  • Page 76 KD-LH3105 Printed circuit boards Main board Main board Forward side Reverse side CN901 CN901 IC901 R184 R183 C910 J121 IC901 C906 C909 J121 C910 R906 C907 D904 C908 D902 C905 C903 C911 C902 C181 CN902 R911 C902 C903 C905 D901...
  • Page 77 KD-LH3105 KD-LH3105 Front board Front board Forward side Reverse side D803 C808 D806 R866 IC803 R868 D419 R418 D418 C812 Q802 R417 D402 Q801 S817 R891 T1-10 T1-9 R895 R424 R836 R874 D401 IC801 R425 R897 R841 D424 R846 D405...
  • Page 78 KD-LH3105 < M E M O >...
  • Page 79 KD-LH3105 VICTOR COMPANY OF JAPAN, LIMITED AV & MULTIMEDIA COMPANY 10-1,1Chome,Ohwatari-machi,Maebashi-city,371-8543,Japan Printed in Japan (No.49839SCH) 2003/05...

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