SERVICE MANUAL MODEL: LM-U2350A, LMS-U2350, LM-U4050A, LMS-U4050, LMS-U4050W, LM-U5050A, LMS-U5050, LMS-U5050W, LMS-U5050S

3CD CHANGER HI-FI SYSTEM

SERVICE MANUALCAUTIONBEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

MODEL: LM-U2350A, LMS-U2350 LM-U4050A, LMS-U4050, LMS-U4050W LM-U5050A, LMS-U5050, LMS-U5050W, LMS-U5050S

[CONTENTS] SECTION 1. GENERAL SERVICING PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 ESD PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 SPECIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5

SECTION 2. ELECTRICAL SECTION ELECTRICAL TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 INTERNAL BLOCK DIAGRAM of ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10 BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15 SCHEMATIC DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19 WIREING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-43 PRINTED CIRCUIT DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-45

SECTION 3. EXPLODED VIEWS CABINET AND MAIN FRAME SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1 TAPE DECK MECHANISM (A/R & A/S : RIGHT A/R DECK) . . . . . . . . . . . . . . . . . . . . . . . . . .3-3 TAPE DECK MECHANISM (A/R & A/S : LEFT A/S DECK) . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5 CD MECHANISM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

SECTION 4. SPEAKER PART SPEAKER PART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1

SECTION 5. REPLACEMENT PARTS LIST REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1

- 1-1 -

SECTION 1. GENERAL SERVICING PRECAUTIONSI NOTES REGARDING HANDLING OF THE PICK-UP1. Notes for transport and storage1) The pick-up should always be left in its conductive bag until immediately prior to use. 2) The pick-up should never be subjected to external pressure or impact.

Storage in conductive bag

Drop impact

2. Repair notes1) The pick-up incorporates a strong magnet, and so should never be brought close to magnetic materials. 2) The pick-up should always be handled correctly and carefully, taking care to avoid external pressure and impact. If it is subjected to strong pressure or impact, the result may be an operational malfunction and/or damage to the printed-circuit board. 3) Each and every pick-up is already individually adjusted to a high degree of precision, and for that reason the adjustment point and installation screws should absolutely never be touched. 4) Laser beams may damage the eyes! Absolutely never permit laser beams to enter the eyes! Also NEVER switch ON the power to the laser output part (lens, etc.) of the pick-up if it is damaged.

NEVER look directly at the laser beam, and dont let contact fingers or other exposed skin.

5) Cleaning the lens surface If there is dust on the lens surface, the dust should be cleaned away by using an air bush (such as used for camera lens). The lens is held by a delicate spring. When cleaning the lens surface, therefore, a cotton swab should be used, taking care not to distort this.

Pressure MagnetPressure

How to hold the pick-up Cotton swab

Conductive Sheet6) Never attempt to disassemble the pick-up. Spring by excess pressure. If the lens is extremely dirty, apply isopropyl alcohol to the cotton swab. (Do not use any other liquid cleaners, because they will damage the lens.) Take care not to use too much of this alcohol on the swab, and do not allow the alcohol to get inside the pick-up.

- 1-2 -

I NOTES REGARDING COMPACT DISC PLAYER REPAIRS1. Preparations1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode). These components are sensitive to, and easily affected by, static electricity. If such static electricity is high voltage, components can be damaged, and for that reason components should be handled with care. 2) The pick-up is composed of many optical components and other high-precision components. Care must be taken, therefore, to avoid repair or storage where the temperature of humidity is high, where strong magnetism is present, or where there is excessive dust.

2. Notes for repair1) Before replacing a component part, first disconnect the power supply lead wire from the unit 2) All equipment, measuring instruments and tools must be grounded. 3) The workbench should be covered with a conductive sheet and grounded. When removing the laser pick-up from its conductive bag, do not place the pick-up on the bag. (This is because there is the possibility of damage by static electricity.) 4) To prevent AC leakage, the metal part of the soldering iron should be grounded. 5) Workers should be grounded by an armband (1M ) 6) Care should be taken not to permit the laser pick-up to come in contact with clothing, in order to prevent static electricity changes in the clothing to escape from the armband. 7) The laser beam from the pick-up should NEVER be directly facing the eyes or bare skin. Armband

Resistor (1 Mohm) Resistor (1 Mohm) Conductive Sheet

CLEARING MALFUNCTION You can reset your unit to initial status if malfunction occur(button malfunction, display, etc.). Using a pointed good conductor(such as driver), simply short the RESET jump wire on the inside of the volume knob for more than 3 seconds. If you reset your unit, you must reenter all its settings(stations, clock, timer) NOTE: 1. To operate the RESET jump wire, pull the volume rotary knob and release it. 2. If you wish to operate the RESET jump wire, it is necessary to unplug the power cord.VOLUME UP RESET jump wire

VOLUME KNOB

DOWN

- 1-3 -

ESD PRECAUTIONSI Electrostatically Sensitive Devices (ESD)Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD devices are integrated circuits and some field-effect transistors and semiconductor chip components. The following techniques should be used to help reduce the incidence of component damage caused by static electricity. 1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging wrist strap device, which should be removed for potential shock reasons prior to applying power to the unit under test. 2. After removing an electrical assembly equipped with ESD devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly. 3. Use only a grounded-tip soldering iron to solder or unsolder ESD devices. 4. Use only an anti-static solder removal device. Some solder removal devices not classified as "anti-static" can generate electrical charges sufficient to damage ESD devices. 5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ESD devices. 6. Do not remove a replacement ESD device from its protective package until immediately before you are ready to install it. (Most replacement ESD devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or comparable conductive materials). 7. Immediately before removing the protective material from the leads of a replacement ESD device, touch the protective material to the chassis or circuit assembly into which the device will by installed. CAUTION : BE SURE NO POWER IS APPLIED TO THE CHASSIS OR CIRCUIT, AND OBSERVE ALL OTHER SAFETY PRECAUTIONS. 8. Minimize bodily motions when handing unpackaged replacement ESD devices. (Otherwise harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity sufficient to damage an ESD device).

CAUTION. GRAPHIC SYMBOLSTHE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHIN AN EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED DANGEROUS VOLTAGE THAT MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK. THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE.

- 1-4 -

SPECIFICATIONSSECTION[General]

MODEL

LM-U5050

LM-U4050

LM-U2350

Power supply Power consumption Weight External dimensions (W x H x D) Frequency response Signal-to-noise ratio Dynamic range Tuning Range Intermediate Frequency Signal to Noise Ratio Frequency Response Tuning Range Intermediate Frequency Signal to Noise Ratio Frequency Response Output Power

T.H.D Frequency Response Signal-to-noise ratio Tape Speed Wow Flutter F.F/REW Time Frequency Response Signal to Noise Ratio Channel Separation Erase Ratio Speaker Name Type Impedance Frequency Response Sound Pressure Level Rated Input Power Max. Input Power Net Dimensions (W x H x D) Weight Speaker Name Type Impedance Frequency Response Sound Pressure Level Rated Input Power Max. Input Power Net Dimensions (W x H x D) Weight

Refer to the back panel of the unit. 200 W 110 W 8.5 kg 280 x 370 x 400 mm 40 - 18000 Hz 75 dB 70 dB 87.5 - 108.0 MHz or 65 - 74 MHz, 87.5 - 108.0 MHz 10.7 MHz 60/55 dB 60 - 10000 Hz 522 - 1620 kHz or 520 - 1720 kHz 450 kHz 30 dB 120 - 2000 Hz Front : 270 W + 270 W (LM-U5050 model only) 250 W + 250 W (LM-U4050/U2350 model only) Surround : 110 W + 110 W (LM-U5050 model only) Subwoofer : 350 W (LM-U5050/U4050 model only) 0.7% 42 - 20000 Hz 80 dB 3000 3 % (MTT-111. NORMAL-SPEED) 0.25 % (MTT -111, JIS-WTD) 120 sec (C-60) 125 - 8000 Hz 40 dB 50 dB (P/B)/45 dB (R/P) 55dB (MTT-5511) Front speaker (L/R) Surround speaker (L/R) [LMS-U5050S] LMS-U5050 LMS-U4050/U2350 Bass Reflex 3Way 3 Speaker Bass Reflex 2Way 2Speaker 6 24 55 - 20000 Hz 60 - 20000 Hz 86 dB/W (1m) 86 dB/W (1m) 270 W 250 W 110 W 540 W 500 W 220 W 250 X 300 X 415 mm 187 X 258 X 415 mm 9.3 kg 4.3 kg Subwoofer (LMS-U5050W/U4050W) 1 Way 1 Speaker 6 45 - 15000 Hz 84 dB/W (1m) 350 W 700 W 279 X 320 X 415 mm 10.0 kg

[CD] [Tuner] [Subwoofer] [Speakers] [TAPE] [Amp] AM (MW) FM

- 1-5 -

- 1-6 -

SECTION 2. ELECTRICAL ELECTRICAL TROUBLESHOOTING GUIDEI SMPS POWER CIRCUITP-SENS PARTSMPS ASSY CN902 7PIN 5.1V CHECK

YES

NO

SMPS TROUBLESHOOTING CONSULT

MAIN PCB CN710 7PIN 5.1V CHECK

NO YESCN710 CONNECTION STATE CHECK

MAIN PCB PATTERN CUTTING AND SHORT CHECK MAIN PCB CN304 5PIN 5.1VCHECK

YESFRONT PN302 36PIN 5.1VCHECK

YESFRONT IC306(RESET IC) STATE CHECK

NO YES

IC306 INPUTVOLTAGE4V, OUTPUTVOLTAGE.2.1VSTATECHECK

U-COM IC304 26PIN 5VCHECK

IC306 KIA7042 CHANGE

VKK CHECKCN710 10PIN DC -33V CHECK

YES

NO

SMPS TROUBLESHOOTING CONSULT

IC304 51PIN VOLTAGE CHECK

- 2-1 -

MICOM (IC301) CHECK"P-SENS" CHECK

YES

NO

P-SENS TROUBLESHOOTING CONSULT

"RESET" IC304 11 PIN CHECK (HIGH LOW HIGH)

YES

NO

Q303 STATE CHECK TR "Q303" CHANGE PN302 35 PIN +5.6V(MI) CHECK MAIN CN710 6 PIN CHECK X301 CHANGE SMPS TROUBLESHOOTING CONSULT

IC304 VDD(17,46,72,90) PIN VOLTAGE CHECK

YES

NO

X301 VIBRATION SIGNAL CHECK

YES

NO

IC301 CHANGE

P-CTRL CHECKPN302 33 PIN "P-CTRL" CHECK (HIGH)

YES

NO

MICOM IC304 STATE CHECK

CN710 5 PIN CHECK

YES

NO

SMPS + MAIN BORD-TO-BORD CHECK

SMPS TROUBLESHOOTING CONSULT

- 2-2 -

MUTING TROUBLESHOOTING (MUTE STATE)Q752(A102) BASE "HIGH"

YES

NO

EXPEND IC(IC305) 5PIN HIGH STATE CHECK

YESQ752(A102)STATE CHECK

YESQ701, Q751(D1302) BASE "HIGH" CHECK Q752(A102) FAULTY IS CHANGE

YESMUTE

NO

YESEACH PART TR CHANGE

EXPEND IC(IC305/501/502) STATE16 PIN VDD VOLTAGE CHECK

YES

NOD332/D553/D551(1SS133) CHECK

3 "EXP-CLK" CHECK

YES

NO

YES

NOMICOM (IC304) 4/84/85 PIN CHECK(CLK1/2/3)

D332/D553/D551(1SS133) CHANGE

2 "EXP-DATA" CHECK

NO YESPCB PATTERN CHECK

YES

NOMICOM (IC304) 3 PIN CHECK

4 PIN ~ 15 PIN EACH PORT STATE CHECK

NO YESPCB PATTERN CHECK

YES

NOEXPEND IC FAULTY IS CHANGE

EXPEND IC OK

- 2-3 -

SPECIFIC FUNCTION MODE HAS NO SOUND (NJW1190) IC601IC201 INPUT CHECK(HEAD INPUT)"A"DECK 32,39 "B"DECK 34,37

YES

NO

DECK HEAD WIRE CONNECTION STATE CHECK

IC201 OUTPUT CHECK(5,26 PIN)

YES

NO

IC502 10PIN(PB MUTE) STATE STATE CHECK

NO 1)IC502 4PIN(REC SW) "LOW" STATE REC

IC601 3,36PIN INPUT SIGNAL CHECK

YESIC502 4PIN(REC SW) "HIGH" CHECK

YES

NO

IC601 17,22 PIN OUTPUT SIGNAL CHECK

YESIC601(NJW1190) TROUBLESHOOTING CONSULT Q212 (C) "HIGH" CHECK

YESDECK OUTPUT

NO

YESQ213 (C) "LOW" CHECK

YESIC502 2 PIN/3 PIN CHECK(DATA/CL IC502 13 PIN "REC-BAIS" HIGH CHECK

1)

YESIC502 16 PIN VDD CHECK

YESL203(4.7MH) COIL VIBRATION SIGNAL CHECK

YES YESIC502 EXPEND IC CHANGE IC601 7 /32 INPUT REC' SIGNAL CHECK

- 2-4 -

AUX

YESJK601 SIGNALINPUT CHECK

YES

IC601 5,34 PIN SIGNALINPUTCHECK

YES

NO

MAIN PCB PATTERN CHECK

IC601 17,22 PIN OUTPUT SIGNAL CHECK

YES

NO

IC601(NJW1190) TROUBLESHOOTING CONSULT

AUX OUTPUT

CD

YESCN709 1,3PIN SIGNALCHECK CD TROUBLESHOOTINGCONSULT

YESIC601 4,35PIN SIGNALINPUTCHECK

YES

NOMAIN PCB PATTERN CHECK

IC601 17,22 PIN OUTPUT SIGNAL CHECK

YESCD OUTPUT

NO

IC601(NJW1190) TROUBLESHOOTING CONSULT

- 2-5 -

TUNER

YESTU101 3 /5 SIGNAL CHECK

YES

NO

TU101 2 PIN "+9V" VOLTAGE CHECK

IC601 2,37 PIN SIGNALINPUTCHECK

YESIC601 17,22 PIN OUTPUT SIGNAL CHECK

TU101 6,7,8,9 PIN CHECK (PLL-CE, PLL-DI, CLK, PLL-DO) TUNER MODULE CHANGE

YESTUNER OUTPUT

MIC

YESCN303 7 PIN "MIC-SIGNAL" CHECK

CN303 4 MIC-SENSE CHECK

YES

NO NOPN400 3 PIN "+12V"CHECK

IC601 44 PIN SIGNAL CHECK(OW601 PATTERN)

YES

IC402 8 PIN SIGNAL INPUT CHECK

YES YESIC601 17,22 PIN OUTPUT SIGNAL CHECK

NO

MIC MUTE CHECK(Q409/ Q408)

PN400 9 "VOL-IN"CHECK

YESMIC OUTPUT

YES

NO

TR CHANGE

IC402 2 PIN SIGNAL INPUT CHECK

YESPN400 10 PIN "VOL-OUT"CHECK

- 2-6 -

IC601(NJW1190) TROUBLESHOOTINGIC601 24PIN VOLTAGE INPUT CHECK

NO YESIC601 19,20 SDA, SCA PULSE WAVE CHECK (VOL UP, DOWN TURN CHECK)

SMPS VOLTAGE CHECK CONSULT

NO YESFUNCTION INPUT PORT SIGNAL CHECK(NJW1190 TROUBLESHOOTING)

IC301 10,8PIN CHECK

IC301 TROUBLESHOOTING

YES

NO

IC601 CHANGE

IC601 17.22 PIN WAVE OUTPUT CHECK

YESIC601 OK

AMP MODULE TROUBLESHOOTINGIC501 9 PIN(AMP-PWR)HIGH CHECK

NOEXPEND IC TROUBLESHOOTING CONSULT

YESIC305 9 PIN(AMP-PWR) HIGH CHECK

YESPN702 3 PIN "PROTECTION"CHECK (HIGH LOW)

NO YESIC701 11 PIN "AMP-ON/OFF" HIGH CHECK

PROTECTION " HIGH" SMPS VOLTAGE AND AMP ON/ OFF STATE CHECK AMP MODULE CHECK : MOS FET BOTH ARE READ SHORT AMP DEAD

YESIC701 12 PIN "PROTECTION" LOW CHECK

AMP MODULE CHANGE

YESIC701 3 ,20 & 5 ,18 EACH +65V &-65V CHECK

NOSMPS TROUBLESHOOTING CONSULT - 2-7 -

YES

IC701 9 ,14 9V CHECK

NO YESIC701 10 , 13 INPUT SIGNAL CHECK SMPS TROUBLESHOOTING CONSULT

YESIC701 5 ,17 OUTPUT SIGNAL CHECK

YESOK

REC CHECK (Q252,Q202 ON :R273,R223 HIGH)IC601 24PIN VOLTAGE INPUT CHECK

YESIC401 EACH INPUTTUNER6,39.TAPE. 7.38.CD. 8.38.AUX.9.36 PIN SIGNAL INPUT CHECK

YES

NO

REC INPUTCHECK CHECK

IC201 7,24 PIN INPUT CHECK

YES

NO

INPUT LINE CHECK

IC201 10.21 PIN OUTPUT CHECK

YESL203 2,3PIN CHECK

NO

REC OUTPUTCHECK AFTER FAULTY IS ICCHANGE

YES

NO

IC202 4PIN STATECHECK

IC202 14 PIN STATESTATE CHECK

NOQ205 BASE 0.6V CHECK

VOLTAGE CHECK CONSULT

YESQ213.212 STATE STATECHECK

NO

IC202 TROUBLESHOOTING CHECK

YESDECK CHANGE

Q204 COLLECTOR LOW

NOQ203 CHANGE

Q204 CHANGE

NOOK - 2-8 -

L203 CHANGE

DUBBING CHECK ("NORMAL OR REC"//"HIGH")IC401 11,34 OUTCHECK

YESIC401 EACH INPUTTUNER6,39.TAPE. 7.38.CD.8.38.AUX.9.36PIN SIGNAL INPUT CHECK

YESIC201 7,24 PIN INPUT CHECK

NOREC INPUTCHECK CHECK

NO YESIC201 10.21PIN OUTPUT CHECK INPUT LINE CHECK

- 2-9 -

INTERNAL BLOCK DIAGRAM of ICs HA12237FBLOCK DIAGRAM

- 2-10 -

NJW1190BLOCK DIAGRAM

AF330W20FSBLOCK DIAGRAM

- 2-11 -

PIN CONFIGURATION

PIN DESCRIPTIONPin Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 Symbol L_DO SUBGND VDD_L L_GND VSS_L L_OUT AM_F1 L_CS VCC L_IN STANDBY P_STATE R_IN VEE R_CS AM_F2 R_OUT VSS_R R_GND VDD_R SUBGND R_DO Type O G P P O G I I P I I O I P I I G O P P G O Description L-Channel Drain Output Sub Ground L-Channel Positive supply Voltage L-Channel Signal Ground L-Channel Negative supply Voltage L-Channel Audio Output AM Mode control Input 1 L-Channel Current Sense Input Positive supply Voltage L-Channel Audio Input ON/OFF control Protection State R-Channel Audio Input Negative supply Voltage R-Channel Current Sense Input AM Mode control Input 2 R-Channel Audio Output R-Channel Negative supply Voltage R-Channel Signal Ground R-Channel Positive supply Voltage Sub Ground R-Channel Drain Output

- 2-12 -

AF350W01FSBLOCK DIAGRAM

PIN CONFIGURATION

- 2-13 -

PIN DESCRIPTIONPin Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Symbol N_DO VSS N_CS P_CS NC NC VEE STANDBY IN P_STATE VCC OUT GND SUBGND VDD P_DO Type O P I I Description NMOS Drain Output Negative supply Voltage NMOS Current Sense Input PMOS Current Sense Input

P I I O P O G G P O

Negative supply Voltage ON/OFF control Audio Input Protection State Positive supply Voltage Audio Output Signal Ground Sub Ground Positive supply Voltage PMOS Drain Output

- 2-14 -

BLOCK DIAGRAM

2-15

2-16

WMA_USB BLOCK DIAGRAM

2-17

2-18

SCHEMATIC DIAGRAMS FRONT SCHEMATIC DIAGRAM

2-19

2-20

MAIN SCHEMATIC DIAGRAM

2-21

2-22

DECK SCHEMATIC DIAGRAM

2-23

2-24

MIC SCHEMATIC DIAGRAM

2-25

2-26

USB_AUX2_H/P SCHEMATIC DIAGRAM

2-27

2-28

WOOFER AMP SCHEMATIC DIAGRAM

2-29

2-30

AMP SCHEMATIC DIAGRAM

2-31

2-32

POWER SCHEMATIC DIAGRAM

2-33

2-34

POWER SCHEMATIC DIAGRAM

2-35

2-36

SUB POWER SCHEMATIC DIAGRAM

2-37

2-38

CDP SCHEMATIC DIAGRAM

2-39

2-40

USB SCHEMATIC DIAGRAM

2-41

2-42

WIRING DIAGRAMS

2-43

2-44

PRINTED CIRCUIT DIAGRAMS MAIN P.C. BOARD

2-45

2-46

MAIN AMP P.C. BOARD

2-47

2-48

MAIN AMP P.C. BOARD

2-49

2-50

FRONT P.C. BOARD

2-51

2-52

CDP P.C. BOARD

2-53

2-54

CDP P.C. BOARD

2-55

2-56

POWER P.C. BOARD

2-57

2-58

POWER P.C. BOARD

2-59

2-60

SUB POWER P.C. BOARD

2-61

2-62

WOOFER AMP P.C. BOARD

2-63

2-64

2-65

2-66

SECTION 3. EXPLODED VIEWS CABINET AND MAIN FRAME SECTION450 A48 303 452

Caution pointA50: Headphone + MIC + USB + Main array assembly pcb.

254 250 251

A49 286

A26

288 255 252

253 267 287 A54

*OPTION290

256 258

266 450 248 260 259 265 262 261 263 274 264 450 A51 301 275 A41

450 280

257 268

279

270 272 273 271 A46 453 A47 283 A43 284 276 278 296 A00 450 305 285 302 A56 269 283

450

281 289 277 451 451 282

A52

3-1

3-2

TAPE DECK MECHANISM (A/R & A/S : RIGHT A/R DECK)

006 001 007 016 008 002 401 402 017 506 037 019 018

021 505 020LOCA. NO. A00 A01 A02 001 002 003 006 007 008 009 011 013 LG PART NO. 6720AG0009A 6768R-UP04A 6768R-EP05A 6768R-BP03D 6768R-BP03E 6768R-PP03A 6768R-QP04A 6768RZGP01A 6768R-SP01F 6768R-MP01C 6768R-SP01A 6768R-SP03A 6768R-AP01A 6768R-GP01H 6768R-AP01C 6768R-GP01J 6768R-SP01P 6768R-BP01C 6768R-LP01C 6768R-VP03A 6768R-GP03A 6768R-JP03B 6768R-JP03A 6768R-CP01B 6768R-CP01A 6768R-CP01D 6768R-WP03A 6768R-WP03B 6768R-WP01D 6768R-WP01E 6768R-WP01H 6768R-WP01F DESCRIPTION DECK,AUDIO DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS SPECIFICATION CWN42RR05 TOKYO PIGEON L-DOUBL 50-093-41285 PIGEON UNIT 50-093-41234 PIGEON HEAD ASSY 02-083-4254 PIGEON BELT/FELT C 02-083-4256 PIGEON BELT/FELT C 33-160-4309 PIGEON PRESS CASSE 50-093-41299 PIGEON MOTOR(ASSY 50-222-41226 PIGEON A/R A/R GE 01-082-4598 PIGEON SPRING CWL4 50-219-4014 PIGEON MOLD CWL44 01-081-4601 PIGEON SPRING CWL4 01-082-4686 PIGEON SPRING CRM4 50-268-3016 PIGEON ARM CWL44 50-093-4503 PIGEON GEAR CRL442 50-239-4072 PIGEON ARM CWL44 50-222-4428 PIGEON GEAR CRL442 01-081-4678 PIGEON SPRING CRL4 02-083-4188 PIGEON BELT/FELT C 50-223-4429 PIGEON PULLEY/FLYW 50-093-4748 PIGEON SOLENOID AS 50-093-4810 PIGEON GEAR ASSY C 50-093-31009 PIGEON PULLEY/FLY 50-093-4674 PIGEON PULLEY/FLYW GSE20A2005 PIGEON SCREW CWL44 GSE10A2003 PIGEON SCREW CWL44 GSL10A1704 PIGEON SCREW CWL44 GWN19S035040 PIGEON WASHER CRM 03-000-4532 PIGEON WASHER CRM4 GWP21X045020 PIGEON WASHER CWL GWP12X030040S PIGEON WASHER CW GWP23X040020 PIGEON WASHER CWL GWN21X040040 PIGEON WASHER CWL

003 402

A01

015 502 507 009 401 501 403 504 025 502 022 023

015 016 017 018 019 020 021 022 023 025 037 401 402 403 501 502 504 505

009 401

A02

011

506 507

013

3-3

3-4

TAPE DECK MECHANISM (A/R & A/S : LEFT A/R DECK)

034 021 019 007 035 008 016 017 018 020LOCA. NO. A00 A01 A03 001 002 003 006 LG PART NO. 6720AG0009A 6768R-UP04A 6768RZEP04A 6768R-BP03D 6768R-BP03E 6768R-PP03A 6768R-QP04A 6768RZGP01A 6768R-SP01F 6768R-MP01C 6768R-SP01A 6768R-SP03A 6768R-AP01A 6768R-GP01H 6768R-AP01C 6768R-GP01J 6768R-SP01P 6768R-BP01C 6768R-LP01C 6768R-VP03A 6768R-GP03A 6768R-JP03B 6768RZBP01A 6768RZLP01A 6768RZLP02A 6768R-JP03A 6768R-CP01B 6768R-CP01A 6768R-CP01D 6768R-WP03A 6768R-WP03B 6768R-WP01D 6768R-WP01E 6768R-WP01H 6768R-WP01F DESCRIPTION DECK,AUDIO DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS DECK MECHANISM PARTS SPECIFICATION CWN42RR05 TOKYO PIGEON L-DOUBL 50-093-41285 PIGEON UNIT 50-093-41238 PIGEON A/R A/R HE 02-083-4254 PIGEON BELT/FELT C 02-083-4256 PIGEON BELT/FELT C 33-160-4309 PIGEON PRESS CASSE 50-093-41299 PIGEON MOTOR(ASSY 50-222-41226 PIGEON A/R A/R GE 01-082-4598 PIGEON SPRING CWL4 50-219-4014 PIGEON MOLD CWL44 01-081-4601 PIGEON SPRING CWL4 01-082-4686 PIGEON SPRING CRM4 50-268-3016 PIGEON ARM CWL44 50-093-4503 PIGEON GEAR CRL442 50-239-4072 PIGEON ARM CWL44 50-222-4428 PIGEON GEAR CRL442 01-081-4678 PIGEON SPRING CRL4 02-083-4188 PIGEON BELT/FELT C 50-223-4429 PIGEON PULLEY/FLYW 50-093-4748 PIGEON SOLENOID AS 50-093-4810 PIGEON GEAR ASSY C 50-093-31009 PIGEON PULLEY/FLY 02-083-4232 PIGEON A/R A/R BEL 50-093-41187 PIGEON A/R A/R PU 50-223-4933 PIGEON A/R A/R PUL 50-093-4674 PIGEON PULLEY/FLYW GSE20A2005 PIGEON SCREW CWL44 GSE10A2003 PIGEON SCREW CWL44 GSL10A1704 PIGEON SCREW CWL44 GWN19S035040 PIGEON WASHER CRM 03-000-4532 PIGEON WASHER CRM4 GWP21X045020 PIGEON WASHER CWL GWP12X030040S PIGEON WASHER CW GWP23X040020 PIGEON WASHER CWL GWN21X040040 PIGEON WASHER CWL

505

003 401

022 023 033 009 401 502 501 403

015

007 008 009 011 013 015 016 017 018 019 020 021 022 023 025 033 034

025 504

009 401 011

035

A03

037 401 402 403 501 502 504 505 506 507

013

3-5

3-6

CD MECHANISM416

151

159

422 170 165 418 419 164 163 162 417 166 417 167 153 168 155 173

156

169

416

177 172 175

LOCA.NO. A26 A30 A35 151 153 155 156 159 162 163 164 165 166 167 168 169 170 172 173 175 177 184 185 186 187 416 417 418 419 421 422

PART NO 4405RCE008G 3041RBM001A 6717R-A002A 3390RB0002A 4470RB0005A 4681RBA001C 6871RF9211A 3390RB0001B 4400R-0012A 4470R-0190A 4470RB0003A 6871RZ7036A 4470RB0006A 4470RB0007A 4470RB0002A 4860RB0002B 3550R-0685A 3040RB0005A 4510RB0001A 4681RBA002A 4470RB0001A 4900RB0002A 3040SB0003A 4970RB0001A 4970RB0001B 88H-0004 88H-0002 353-025BAAA 88H-0003 6756SBX001A 353-028H

DESCRIPTION MECHANISM ASSEMBLY BASE ASSEMBLY PICK UP ASSEMBLY TRAY GEAR MOTOR ASSEMBLY PWB(PCB) ASSEMBLY,FRONT TRAY BELT GEAR GEAR PWB(PCB) ASSEMBLY,OTHERS GEAR GEAR GEAR CLAMP COVER BASE LEVER MOTOR ASSEMBLY GEAR DAMPER BASE SPRING SPRING CD MECHA PARTS CD MECHA PARTS "SCREW,DRAWING" CD MECHA PARTS CD MECHANISM PARTS SCREW

SPECIFICATION CDM-H1543 3 CD CHANGER (SPRING PU(SPRING DAMPER) SS P/UP CMS-D77SG6 SAMSUNG FRONT LOADI DISC(CDM-H1503) TRAY (CDM-H1503) HOME TRAY (CDM-H1503) MABUCHI 1503 T/D SENSOR DECK/MECHA CDM-H1503 MOLD LOAD DECK/MECHA MAIN CDM-H1503V OTH DECK/MECHA PULLEY CDM-H1503V M LOADING (CDM-H1503) CDM-H1503 UP/DW/OP/CL PU UP (CDM-H1503) PU DOWN (CDM-H1503) CAM (CDM-H1503) HOME CDM-H1503 MOLD CLAMP ASSY DECK/MECHA GUIDE MOTOR CDM-H15 MAIN (CDM-H1503) S/W CLOSE HOME LOADING (PULLEY 8.6) MAIN (CDM-H1503) HOME 3CD CHANGER MOLD RUBBER PU(CDM-H1303) COIL 3 CD CHANGER COIL 50 3CD CHANGER 3X12X12FNM 3X9X12FZMY #NAME? 3X12X10FZMY SCREW 2.6X10X10XFZMY CDM-H813 #NAME?

3-7

3-8

SECTION 4. SPEAKER SECTION MODEL: LMS-U2350, LMS-U4050, LMS-U5050850 (RIGHT) 868 (LEFT) 852 A80 853 854 855 WIRE 81

851

856 858 WIRE 80 866 869 851 870 864 865

867 (LEFT) 860 862 859 857

863

- 4-1 -

MODEL: LMS-U5050W, LMS-U4050W750

A70

WIRE 72 762

759 761 760

771 751752

WIRE 71

A75 758 757 755783

770

753772

756

754

- 4-2 -

MODEL: LMS-U5050S

A60

654 662 661 653 665 (RIGHT)

660

656

655 WIRE 63 651 650 (LEFT)

WIRE 62 WIRE 61

659

663 (RIGHT)

657 (LEFT) 658

- 4-3 -

- 4-4 -