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LG LMU360_LMU365_LMS-U360_LMS-U365 service manual
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SERVICE MANUAL MODEL : LM-U360/LMS-U360, LM-U365/LMS-U365
3CD CHANGER MINI Hi-Fi SYSTEM SERVICE MANUAL
P/NO : AFN31223617
JULY,2006
MODEL : LM-U360/LMS-U360, LM-U365/LMS-U365
[CONTENTS]
r SECTION 1. GENERAL
· SERVICING PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 · ESD PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 · SPECIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
r SECTION 2. ELECTRICAL
· ELECTRICAL TROUBLESHOOTING GUIDE(AUDIO PART) . . . . . . . . . . . . . . . . . . . . . . . . 2-1 · INTERNAL BLOCK DIAGRAM of ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13 · ELECTRICAL TROUBLESHOOTIHG GUIDE & WAVEFORM(CD PART) . . . . . . . . . . . . . . 2-22 · WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-36 · BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-38 · SCHEMATIC DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-40 · PRINTED CIRCUIT DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-54
r 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 · SPEAKER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
r SECTION 4. REPLACEMENT PARTS LIST
· REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
- 1-1 -
SECTION 1. GENERAL
SERVICING PRECAUTIONS
I NOTES REGARDING HANDLING OF THE PICK-UP
1. Notes for transport and storage
1) 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 notes
1) 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 don't 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.
Magnet
Pressure
Pressure
How to hold the pick-up
Cotton swab
Conductive Sheet
6) 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 REPAIRS
1. Preparations
1) 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 repair
1) 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 PRECAUTIONS
I 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 SYMBOLS
THE 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 -
SPECIFICATIONS
[GENERAL] Power supply Power consumption Net Weight External dimensions (W x H x D) [CD] Frequency response Signal-to-noise ratio Dynamic range [TUNER] FM Tuning Range Intermediate Frequency Signal to Noise Ratio Frequency Response AM [MW] Tuning Range Intermediate Frequency Signal to Noise Ratio Frequency Response [AMP]MPLIFIER(LH-W96's) Output Power Refer to the back panel of the unit. Refer to the back panel of the unit. 6.2 kg 273 x 321x 359 mm
40 - 20000 Hz 75 dB 75 dB
87.5 - 108.0 MHz 10.7 MHz 60/55 dB 50 - 10000 Hz 522 - 1620 kHz or 520 - 1720 kHz 450 kHz 30 dB 140 - 1800 Hz
T.H.D Frequency Response Signal-to-noise ratio [TAPE] Tape Speed Wow Flutter F.F/REW Time Frequency Response Signal to Noise Ratio Channel Separation Erase Ratio [SPEAKERS] MODEL Type Impedance Frequency Response Sound Pressure Level Rated Input Power Max. Input Power Net Dimensions (W x H x D) Net Weight
100W +100W+150W [LM-U1560+LMS-U1560W(SUB WOOFER)] 100W+100W [LM-U1060] 50W +50W [LM-U560] 30W + 30W [LM-U360] 0.5% 40 - 20000 Hz 75 dB
4.75cm/sec 0.25% (MTT -111, JIS-WTD) 120sec (C-60) 250 - 8000Hz 43dB 50dB(P/B)/45dB(R/P) 55dB (MTT-5513)
LMS-U1560 LMS-U1060 2way 2speaker 4 50-20000Hz 85dB/W (1m) 100W 200W 229X224X286mm 3.8kg
LMS-U1560W (SUB WOOFER) 1way 1speaker 3 50-15000Hz 84dB/W (1m) 180W 360W 273x325x384mm 6kg
LMS-U560 2way 2speaker 4 55-20000Hz 86dB/W (1m) 50W 100W 229X224X286mm 3.9kg
LMS-U360 2way 2speaker 4 55-20000Hz 86dB/W (1m) 30W 60W 229X224X286mm 3.8kg
- 1-5 -
- 1-6 -
SECTION 2. ELECTRICAL
ELECTRICAL TROUBLESHOOTING GUIDE(AUDIO PART)
I MICOM PART CHECK I
P7904 6PIN P-SENS check
NO
Refer to SMPS Troubleshooting
YES
IC101 KIA7042?
NO YES
Check if IC101 KIA7042 input is over 5V
YES
NO
IC101 KIA7042 relevant parts check
NO
IC100 78KO/KF2 1 PIN Power Check
Check if IC101 KIA7042 input is over 4.3V
YES
normal
YES
normal
relevant parts replacement
- 2-1 -
I MICOM PART CHECK II
P7904 5PIN 5.6V check
NO YES
D101 1SR35 both terminal power check
Refer to SMPS Troubleshooting
NO YES
Output 5V operation check D101 1SR35
YES
relevant parts check
NO
relevant parts replacement
YES
Q101 EMITTER 5V check and COLLECTO normal
YES
Q102 BASE PIN 0.6V HIGH check
NO YES
IC 103 8PIN IC 100 19,20,59 PIN 5V check Q102 COLLECTOR 0.6V LOW check
Check if IC101 KIA7042 output power is over 4.3V
YES NO
relevant parts check
YES
X101:32.768KHz X100:9.8304MHz operation status check
YES YES
relevant parts check normal relevant parts replacement relevant parts replacement
YES
YES
normal
normal
- 2-2 -
I IC103 KS4CD21CS CHECK
IC100 78KOKF2 22,24 PIN Check
YES
22 PIN DATA
NO
MICOM power 5V check
NO
Refer to MICOM Troubleshooting
YES YES
relevant parts check
YES
NO
relevant parts replacement
normal
normal
I FLD DISPLAY CHECK
P7904 1,2,3 power check
YES
NO
Refer to SMPS Troubleshooting
F1+, F2 both terminal: 5V and above VKK: power is over 26V
YES
P7302 connection status check and power check F+,F2- both termainal: 5V or above VKK:26V or above power check
NO
P7302 assembly check
YES
Each PIN power check
YES
YES
IC301 PT6324 Power check 50 PIN VKK:-26V 9, 51 PIN +5V normal
NO
relevant parts replacement
YES
- 2-3 -
YES
NO
If 5V defective D321 SR35 input and output power check
YES
IC100 © IC301 DATA Communication check PIN PIN (ST8)75 PIN © 3PIN(STB) (DO) 76 PIN © 2PIN(DO) (DI) 77 PIN © 4PIN(DI) (CLK)78 PIN © 1PIN(CLK)
relevant parts check
NO YES
normal
relevant parts replacement
YES
NO
IC100 (STB)75 PIN © (STB) (DO) 77 PIN © 4PIN(DO) (CLK) 78 PIN © 1PIN(CLK) Data output check
YES
76 PIN © DATA input check
YES
FLT light on relevant parts check
YES
NO YES
normal
relevant parts replacement
normal
- 2-4 -
I PWM ALTERATION PART CHECK
P7905 9PIN 3.3V check
NO
Refer to SMPS Troubleshooting
YES
IC604 PS9829 VDD PIN Power check (3.10.22.29.39.47.56.65.72. 87. 94)
YES
X601 12.288MHz operation check
NO YES
IC604 PS9829 86 PIN CLK input check
relevant parts check X604 12.288MHz
YES
normal
NO
relevant parts replacement
YES
IC100 78KOKF2 21 © PWM_CLK 22 © PWM_DATA 23 © PWM_REST output check
NO
R668(470) output check
YES
normal
NO
relevant parts replacement
NO YES
IC604 PS9829 DATA input check 78 PIN © DATA 79 PIN © CLK 96 PIN © REST
LINE resistance check DATA:R671 CLK:R670 RST:R665
NO YES
normal
relevant parts replacement
YES
NO
CD ASS`Y PS9829 communication status check(P7403)
YES
PWM MODULATOR output check FL:75(+)74(-)FR:71(+)70(-) SW:68(+)67(-)
NO
Refer to CD Troubleshooting
IC604 PS9829 DATA input check
YES
normal
NO
Check each line resistance check
YES
normal
NO
IC604 PS9829 parts check
- 2-5 -
I POWER AMP PART CHECK
P7905 3 PIN+12 13.14.15 PIN [ LM-U1560 : 32V/LM-U1060 : 32V/LM-U560 : 22V/LM-U360 : 16V ]
YES
NO
Refer to SMPS Troubleshooting
Each IC700,701 34, 29, 26, 21 PIN input power check
YES
Each IC700, 701 1, 36.17, 18, 19 PIN +12V input power check Each LINE resistance output power check IC700:R702, 701, 726, 727, 724 IC701:R730, 729, 750 ,753, 752(Only LM-U1560)
YES
NO
PWM MODULATOR input power check Each IC 4.6.14.16 PIN
YES
POWER IC 700.701.702.703 34.29.27.20 PIN output check
YES
Output LINE COIL check
NO
relevant parts replacement
YES
normal
- 2-6 -
I AUX FUNCTION
Check whether JK800 contacts or not
YES
IC200 (BU4052)4,11PI N input waveform check
NO YES
IC200 (BU4052)3,13PIN output waveform check
IC200 (BU4052)16PINVDD, 8PIN VSS power check
YES
NO
µ-COM (IC100) 3, 6PIN Communication check
YES
IC801 (MC4580) 3, 5 PIN input waveform check relevant parts replacement
NO YES
IC801 (MC4580)4PIN VSS,8PIN VDD power check
YES
IC801(MC4580) Pins 1, 7 output check relevant parts replacement
NO
Refer to SMPS Troubleshooting
YES
IC603(CS5340) Pins10, 12 input check
YES
NO
IC603 Pin4 SDout check
normal
YES
NO
IC603 Pins2, 7, 8 check
Relevant Part repplacement
- 2-7 -
I TUNER FUNCTION CHECK
Tuner module (TUN800) operation check
YES
IC200(BU4052)1, 12PIN input waveform check
NO
TUNER MODUEL power check (2PIN 9Vcheck)
YES
IC200 (BU4052)3,13PIN output waveform check IC601(BU4052)2,15PIN input waveform check
YES
IC801 (MC4580)2,6PIN input waveform check.
NO
YES IC200 (BU4052)16PINVDD,8PIN VSS power check
relevant parts replacement
YES
IC801(MC4580) Pins 1, 7 input check
NO
YES IC801(MC4580)4PIN VSS,8PIN VDD power check
relevant parts replacement
YES
IC603(CS95340) Pins10, 12 input check
I TAPE FUNCTION CHECK
TAPE PCB ASS`Y
YES
IC200(BU4052)2,1 5PIN input waveform check
YES
IC200 (BU4052)3,13PIN output check IC601(BU4052) 2,15PIN input waveform check
NO
YES IC200 (BU4052)16PINVDD,8PIN VSS power check
relevant parts replacement
YES
IC801 (MC4580)2,6PIN input check
YES
IC801(MC4580) Pins 1, 7 input check
NO
YES IC200 (BU4052)16PINVDD,8PIN VSS power check
relevant parts replacement
YES
IC603(CS95340) Pins10, 12 input check - 2-8 -
I TAPE PLAY PART CHECK
P2707:4 PIN © 12V
NO YES
IC201 (HA12237)16 PIN 12V input waveform check
Refer to SMPS Troubleshooting
YES
IC201:5.26 PIN Signal Output check
NO
DECK HEAD input check
YES
YES
DECK HEAD input IC201 32.39 PIN check
NO HEAD WIRE or Mecha replacement
YES
IC20114 PIN MUTE operation check relevant parts check
NO
YES
normal
relevant parts replacement
NO YES
IC202 10 PIN HIGH operation check
YES
relevant parts check
NO YES
normal normal
relevant parts replacement
- 2-9 -
I TAPE REC PART CHECK
IC604 PS9829 #49,#52 PWM NO output check Refer to PWM modulation part
YES
P7207 #2.#4 output check
NO
Q601 Collector waveform check
YES NO
P2707 #5.#7 input check Board to Board cantact check
YES
IC203 MC4580 #1,#7 check
NO YES
IC201 7.24 PIN REC input check
IC203 8 PIN +12V check
YES
relevant parts check
NO
Refer to SMPS Troubleshooting
YES
YES
normal
NO
relevant parts replacement
IC201 10.21 PIN output check
YES
L203 2.3 PIN oscillation check
YES
P2203 5.3 PIN input check 8 PIN ERASE input check
NO YES
Q205(D1304) BASE HIGH check
YES
normal normal
NO
IC202 4 PIN HIGH operation check
YES
relevant parts replacement
- 2-10 -
I SMPS POWER CIRCUIT
*MAIN PART
Check the fuse F901
NO
Replace the fuse
YES
Check the DC V of C905. If DC V is over 400V
NO
Check BD901, LF901,902
YES
Chcek the DC V Of C909, C903,C921 If DC V is in 14~19V and it is steady.
NO
Check IC901 ,902
NO
Replace IC 901,902
YES
Check the DC V Of C981,C945. If DC V is 6.1V
YES
Check short of P9701,P9702 line
NO YES
Chcek the DC VOf C950,C951 If DC V is in 35V,-35V
Check short of P9702 line
NO
Check short of P9701 line
YES
OK
- 2-11 -
*P-SENS PART (OPTIONAL PART)
Check the PIN6 OF P9702 If DC V is over 5.6V
NO
Check power circuit Trouble shooting
YES
OK
*VKK PART
Check the PIN3 OF P9702 If DC V is over -28V ±2
NO
Check power circuit Trouble shooting
YES
OK
- 2-12 -
INTERNAL BLOCK DIAGRAM of ICs
· UTC MC4580
PIN CONFIGURATION
TEST CIRCUIT
- 2-13 -
· FAN8082D
Internal Block Diagram
- 2-14 -
· BU2090
Block diagram
- 2-15 -
· BA3308 / BA3308F
BLOCK DIAGRAM
BA3308
BA3308F
- 2-16 -
· HT1200-4
SYSTEM BLOCK DIAGRAM
- 2-17 -
· HT1200-4
FUNCTIONAL BLOCK DIAGRAM
- 2-18 -
· CS5340
BLOCK DIAGRAM
· BU4052
BLOCK DIAGRAM
- 2-19 -
· HA12237F
BLOCK DIAGRAM
- 2-20 -
· PT6324
BLOCK DIAGRAM
- 2-21 -
ELECTRICAL TROUBLESHOOTIHG GUIDE & WAVEFORM(CD PART)
I POWER CHECK GUIDE
POWER ON POWER ON
DOES CD APPEAR AT FLD?
PUSH KARAOKE CD BUTTON
DOES AUX,FM 87.5 APPEAR AT FLD?
Y
OK.
Y
DOES DISK1 APPEAR AT FLD?
N N
DOES IT APPEAR CD ERROR AT FLD?
N
Y
DOES NO DISC OR TIME ARE APPEARED AT FLD?
Y N
CHECK CONNECTOR (P4703,P4004, P5701) RECONNECT IT.
Y
OK
CHECK THE VOLTAGE OF EACH PIN ON P5701.
N
Y
CHECK CD MD MODULE.
CHECK CONNECTOR P7501.
- 2-22 -
I CD PART
TURN ON CD
OPEN CLOSE CHECK
CONNECTOR CHECK ( PN803, PN804 )
CHECK Voltage CN806 PIN1:12, PIN2:6.3V
CHECH Vtg PN805 PIN22 : CLOSE,PIN23:OPEN
" READING " DISPLAY CHECK
CONNECTOR CHECK (PN802, PN803, PN804, CN806,PN814 )
CHECK MICOM INTERFACE CIRCUIT( PN805 ) (CE,BTL-MUTE,CD-IN,CDOUT,CLK,WRQ,FSEQ)
READING OK CHECK
CONNECTOR CHECK(PN801,PN802)
CHECK PICKUP MOVEMENT
CHECK AM5810FP (IC802)
CHECK LC78692 (IC801)
IF PLAY, AUDIO OUTPUT CHECK
CHECK PN805 AUDIO DATA PIN10 : DA_LRCK (IC801 PIN60 LRSY) PIN11 : DA_BCK (IC801 PIN59 DATACLK) PIN12 : DA_DATA0 (IC801 PIN58 DATA)
OK
- 2-23 -
I OPEN CLOSE NG
CONNECTOR LOCKING CHECK ( PN803, PN804, PN814 )
CHECK POWER SUPPLY CIRCUIT ( PN805, CN806) CN806 PIN1:12V, PIN2:6.3V, PN805 PIN8:+5V_AD
DEFECTIVE MAIN POEWR SUPPLY
CHECK VOLTAGE CHANGE OF OPEN CLOSE IC803 INPUT VOLTAGE PIN6:12V, PIN7:6.3V (PN805 PIN2:BTL_MUTE, 23:OPEN, 22:CLOSE)
DEFECTIVE MICOM
CHECK VOLTAGE CHANGE LO+, LO- OF IC803 (PN805 PIN23:OPEN, PIN22:CLOSE)
DEFECTIVE IC803
DEFECTIVE MECHANISM
- 2-24 -
I " READING " DISPLAY CHECK (= ONLY "CD" DISPLAY)
CONNECTOR LOCKING CHECK (PN802, PN803,PN804,PN805,CN806 )
CHECK POWER SUPPLY PORT( PN805, CN806) CN806 PIN1: 12V, PIN2: 6.3V, PIN4: 5V PN805 PIN8 = 5V_AD
DEFECTIVE CONNECTOR OR MAIN POWER SUPPLAY
CHECK VOLTAGE THE PIN 2 OF IC804 IC804 PIN2 : 3.3V
DEFECTIVE IC804
CHECK RESET SIGNAL OF PN805 PN805 PIN19: 5V
DEFECTIVE MICOM OR CONNECTOR
CHECK MICOM INTERFACE CIRCUIT( PN805 ) PN805 PIN 1,3,4,15,19,26 SIGNAL CHECK (1: CE, 3: DI, 4: CLK, 15: D0, 19: RST, 18: FSEQ, 26: WRQ) PIN3 DI : FROM DSP TO MICOM PIN15 DO: FROM MICOM TO DSP CHECK THE WAVE FORM #1
DEFECTIVE MICOM OR CONNECTOR
DEFECTIVE IC801
- 2-25 -
I READING OK CHECK (= "NO DISC" DISPLAY)
CONNECTOR LOCKING CHECK(PN801,PN802)
A
DOES SLED MOVE ? CHECK PN802 PIN 3,4( SL+,SL-) DEFECTIVE PICKUP OR IC802 OR IC801
B
DOES LENSE MOVE ? (= UP & DOWN) CHECK PN801 PIN 13,16 ( FA+,FA-) DEFECTIVE PICKUP OR IC802 OR IC801
C
DOES LASER LIGHT ? CHECK PN801 PIN 10( LD ) DEFECTIVE PICKUP OR IC801
D
DOES SPINDLE ROTATE ? CHECK PN802 PIN 5,6( SP+,SP-) DEFECTIVE PICKUP OR IC802 OR IC801
E
IS READING OK ? CHECK PN801 PIN 14,15 (TA+,TA-) DEFECTIVE PICKUP OR IC802 OR IC801
- 2-26 -
I READING OK CHECK #A (= "NO DISC" DISPLAY)
A
DOES SL+ WAVEFORM APPEAR AT ( IC802 PIN13 AND PN 802 PIN3) WAVEFORM #2 SLED MOTOR WAVE DOES SLIN WAVEFORM APPEAR AT ( IC802 PIN5) WAVEFORM #2 SLED DRIVE WAVE
DEFECTIVE IC801
DEFECTIVE IC802
CHECK PN802 CONNECTOR LINE
DEFECTIVE PN802 CONNECTOR
DEFECTIVE PICKUP SLED MOTOR
- 2-27 -
I READING OK CHECK #B (= "NO DISC" DISPLAY)
B
DOES FA+ WAVEFORM APPEAR AT ( IC802 PIN16 AND PN801 PIN13) WAVEFORM #3 FOCUS COIL DRIVE WAVE DOES FAINWAVEFORM APPEAR AT ( IC802 PIN 25) WAVEFORM #3 FOCUS DRIVE WAVE
DEFECTIVE IC801
DEFECTIVE IC802
CHECK PN801 CONNECTOR LINE
DEFECTIVE PN801 CONNECTOR
DEFECTIVE PICKUP FOCUS ACTUATOR
- 2-28 -
I READING OK CHECK #C (= "NO DISC" DISPLAY)
C
IS 3.3 V APPLIED TO PIN30, 36, 39, 41, 61, 68, 75 OF IC801 RF IC SUPPLY VOLTAGE CHECK
IS ?V APPLIED TO PIN10 OF PN801 LASER SUPPLY VOLTAGE CHECK
DEFECTIVE IC804
IS 2.3 V PIN18(LDO) OF IC801 LASER CONTROL VOLTAGE CHECK
DEFECTIVE IC801
DEFECTIVE Q801 OR D801
CHECK PN801 CONNECTOR LINE
DEFECTIVE PN801 CONNECTOR
DEFECTIVE PICKUP LASER PART
- 2-29 -
I READING OK CHECK #D (= "NO DISC" DISPLAY)
D
DOES SP+ WAVEFORM APPEAR AT ( IC802 PIN11 AND PN802 PIN 5) WAVEFORM #4 SPINDLE MOTOR DRIVE WAVE
DOES SPIN WAVEFORM APPEAR AT (IC802 PIN6) WAVEFORM #4 SPINDLE DRIVE WAVE
DEFECTIVE IC801
DEFECTIVE IC802
CHECK PN802 CONNECTOR LINE
DEFECTIVE PN802 CONNECTOR
DEFECTIVE PICKUP SPINDLE MOTOR
- 2-30 -
I READING OK CHECK #E (= "NO DISC" DISPLAY)
E
DOES TA+ WAVEFORM APPEAR AT ( IC802 PIN17 AND PN801 PIN14) WAVEFORM #5 TRACKING COIL DRIVE WAVE
DOES TAINWAVEFORM APPEAR AT ( IC802 PIN 22) WAVEFORM #5 TRACKING DRIVE WAVE
DEFECTIVE IC801
DEFECTIVE IC802
CHECK PN802 CONNECTOR LINE
DEFECTIVE PN802 CONNECTOR
DOES ARF SIGNAL APPEAR? (IC801 PIN 2 ) WAVEFORM #6
DEFECTIVE PICKUP OR IC801
DOES FE, TE SIGNAL APPEAR? (IC801 PIN10:RFMON , PIN16:TE) WAVEFORM #6 * REMON IS FE
DEFECTIVE PICKUP OR IC801
- 2-31 -
I USB PART
TURN ON USB
" CHECKING " OR "USB" DISPLAY CHECK
CONNECTOR CHECK ( PN805, CN806, PN810 )
CHECK POWER SUPPLY CIRCUIT( CN806 )
CHECK MICOM INTERFACE CIRCUIT( PN805 ) PIN13: RX (IC805 PIN49 :TXD) PIN14: TX (IC805 PIN33 : RXD)
READING OK CHECK
CHECK PN810 1 PIN : 5V
CHECK PN810 PIN 2(D-), 3(D+)
CHECK OTI6888 (IC805)
IF PLAY, AUDIO OUTPUT CHECK
CHECK SIGNAL STCK,STREQ,STDATA STCK : IC805 PIN52 , IC801 PIN 55 STREQ : IC805 PIN53 , IC801 PIN 54 STDATA: IC805 PIN54 , IC801 PIN 56
OK CONNECTOR CHECK (CN806)
- 2-32 -
I WAVEFORMS OF MAKOR CHECK POINT
#1. MICOM INTERFACE WAVEFORM (PN805 PIN 26, 19, 3, 15) DURING POWER ON #2. MICOM INTERFACE WAVEFORM (PN805 PIN 26, 19, 3, 15) DURING NORMAL PLAY
PIN 26 : WRQ PIN 26 : WRQ PIN 19 : RESET PIN 3 : DI (IC801 PIN46 DATA OUT) PIN 3 : DI (IC801 PIN46 DATA OUT) PIN 15 : DO (IC801 PIN45 DATA IN)
PIN 19 : RESET
PIN 15 : DO (IC801 PIN45 DATA IN)
#1. MICOM INTERFACE WAVEFORM (PN805 PIN 4, 1, 18) DURING POWER ON
PIN 4 : CL
#1. MICOM INTERFACE WAVEFORM (PN805 PIN 4, 1, 18) DURING NORMAL PLAY
PIN 4 : CL
PIN 1 : CE
PIN 1 : CE
PIN 18 : FSEQ
PIN 18 : FSEQ
- 2-33 -
I WAVEFORMS OF MAKOR CHECK POINT
#2. SLED DRIVE AND MOTOR WAVEFORM (IC802 PIN 5, 13) WHEN FOCUS SEARCH #2. MICOM INTERFACE WAVEFORM (PN805 PIN 26, 19, 3, 15) DURING NORMAL PLAY
PIN 26 : WRQ
PIN 5 : SLIN
PIN 5 : SLIN
PIN 13 : SL+
PIN 13 : SL+
#3. FOCUS DRIVE AND MOTOR WAVEFORM #3. FOCUS DRIVE AND MOTOR WAVEFORM (IC802 PIN 25, IC802 PIN 16) (IC802 PIN 25, IC802 PIN 16) · WHEN FOCUS SEARCH FAILED OR THERE IS · THERE IS DISC ON TRAY AND FOCUS SEARCH NO DISC ON TRAY SUCCESS
PIN 25 : FAO
PIN 25 : FAO
PIN 16 : FA+
PIN 16 : FA+
- 2-34 -
I WAVEFORMS OF MAKOR CHECK POINT
#4. SPINDLE DRIVE AND MOTOR WAVEFORM (IC802 PIN 6, 11) WHEN TOC READING #5. TRACK DRIVE AND MOTOR WAVEFORM (IC802 PIN 22 , IC802 PIN 17) DURING NORMAL PLAY
PIN 22 : TAO
PIN 6 : SPIN PIN 11 : SP+
PIN 17 : TA+
#6. RF, FOCUS AND TRACKING ERROR WAVEFORM (IC801 PIN 2, 10, 16) DURING NORMAL PLAY
PIN 2 : RFOUT
PIN 16 : TE
PIN 10 : RFMON(FE)
- 2-35 -
WIRING DIAGRAM
FRONT A EAD30732401 B EAD30731701 C 561-7073
MAIN A 561-7150 C 6630XE00130 B D 561-711H E 6630XF00429 F G 561-843G
CD
A C B E F F
561-711C 561-711E D 6630XE00130 561-715D G 561-711F 6630XE00816
DECK A B 561-844G C 561-715C D 6630XF00415 E 561-715H
SMPS A 6631R-F039K B 6631R-E108H
3 CHANGER MECHANISM
E
6850R-H020A 561-715H
D C
15P 3PIN 8PIN
B
DECK MECHANISM
8PIN
A
563-935H
F
8PIN
G
8PIN 29PIN
E
6850R-H322A
D
C
29PIN
8PIN
C
4PIN 30PIN
A
8PIN
B
FRONT BORD
4PIN
A C B B A
8PIN
5PIN 5PIN 6PIN
F E
2PIN 8PIN
CD BORD
A D G B
4PIN
30PIN 16PIN
8PIN
6850R-G420B EAD30732801
2-36
2-37
BLOCK DIAGRAM
LM-U1560 : LM-U1060 : LM-U560 : LM-U360 :
2.1CH (100W X 2Ch + 150W) 2CH (100W X 2Ch ) 2CH (50W X 2Ch) 2CH (30W X 2Ch)
VFD DRIVE IC PT6324 VFD DATA.CLK
9.8304 MHz
FLD (DISPLAY)
MAIN BOARD
AMP BOARD
12.288 MHz
RESET SD FL
SOL" A" SOL" B" MOTER HIGH/NORM
EXP CLK DATA NEC AUDIO MICOM
9829_DAT 9829_RESET 9829_CLK
DECK
EXPENDER REC MUTE P/B MUTE A/B RETM REC SW REC MUTE
PS9829B PWM MODULATOR
FL+/-, FR+/RL+/-, RR+/CENTER+/WOOFER+/-
HT1000 Power Amp
FR
S/W
LEVEL METER H/P_SW PWM OUT REC L/R CS5340 CLK.DA TA
CE,DI,DO,CLK,WR Q,FSEQ
LM-U1560 SUB WOOFER
OP AMP
HA1227 TAPE IC TUNER MODULE
TAPE L/R AUX INPUT MIC INPUT
RDS DATA.CLK
OP AMP
LRCK,BCK,SDA TA0
PLL DA T.CLK BU4052 DATA TUNER L/R AUX L/R CS5340 REST
HEAD PHONES
4052 (Switch IC)
OP AMP
CS5340
12.28MHz
CD
SANYO LC78692W (New Version)
USB HOST
D+,D-
2-38
2-39
SCHEMATIC DIAGRAMS
· MAIN SCHEMATIC DIAGRAM
12
11
10
9
8
7
6
5
4
3
2
1
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
2-40
2-41
· AMP SCHEMATIC DIAGRAM
12
11
10
9
8
7
6
5
4
3
2
1
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
2-42
2-43
· FRONT SCHEMATIC DIAGRAM
12
11
10
9
8
7
6
5
4
3
2
1
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
2-44
2-45
· DECK SCHEMATIC DIAGRAM
12
11
10
9
8
7
6
5
4
3
2
1
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
2-46
2-47
· CD SCHEMATIC DIAGRAM
12
11
10
9
8
7
6
5
4
3
2
1
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
2-48
2-49
· USB SCHEMATIC DIAGRAM
12
11
10
9
8
7
6
5
4
3
2
1
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
2-50
2-51
IMPORTANT SAFETY NOTICE WHEN SERVICING THIS CHASSIS, UNDER NO CIRCUMSTANCES SHOULD THE ORIGINAL DESIGN BE MODIFIED OR ALTERED WITHOUT PERMISSION FROM THE LG ELECTRONICS CORPORATION. ALL COMPONENTS SHOULD BE REPLACED ONLY WITH TYPES IDENTICAL TO THOSE IN THE ORIGINAL CIR-
· SMPS SCHEMATIC DIAGRAM
12
CUIT. SPECIAL COMPONENTS ARE SHADED ON THE NOTE : SCHEMATIC FOR EASY IDENTIFICATION. 1. Shaded( ) parts are critical for safety. Replace only THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIFwith specified part number. FER FROM THE ACTUAL CIRCUIT USED. THIS WAY, 2. Voltages are DC-measured with a digital voltmeter IMPLEMENTATION OF THE LATEST SAFETY AND during Play mode. PERFORMANCE IMPROVEMENT CHANGES INTO THE SET IS NOT DELAYED UNTIL THE NEW SERVICE LITERATURE IS PRINTED.
11
10
9
8
7
6
5
4
3
2
1
NOTES) NOTES) Symbol denotes AC ground. Symbol denotes DC chassis ground. NOTE) NOTE) NOTE) NOTE) Warning Parts that are shaded are critical With respect to risk of fire or electricial shock.
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
2-52
2-53
PRINTED CIRCUIT DIAGRAMS
· MAIN P.C. BOARD (TOP VIEW)
2-54
2-55
· MAIN P.C. BOARD (BOTTOM VIEW)
2-56
2-57
· FRONT P.C. BOARD
2-58
2-59
· SMPS P.C. BOARD
· DECK P.C. BOARD
(TOP VIEW)
(BOTTOM VIEW)
2-60
2-61
· CD P.C. BOARD (TOP VIEW)
2-62
2-63
· CD P.C. BOARD (BOTTOM VIEW)
2-64
2-65
SECTION 3. EXPLODED VIEWS
CABINET AND MAIN FRAME SECTION
A26
260 A43 451
A44 A51
CABLE3
A49 A41
259 A50 258 256 A46 TUN800
266 451
255 257 CABLE2
264 263
254 252 288 255
451
450
A00 253 A47
3-1
3-2
250 CABLE1 251 CN201
289 267
300
290 454 A40 291
3-1
3-2
TAPE DECK MECHANISM (A/R & A/S : LEFT A/S DECK)
006 A00 037 001 007 017 008 002 003 018 019
021 020
A01
LOCA. NO. A00
LG PART NO. 6720AG0013A 6768RZUP01A 6768R-EP05A 6768RZBP04A 6768RZBP05A 6768R-PP03A 6768R-QP04A 6768RZGP03A 6768R-SP01F 6768R-MP01C 6768R-SP01A 6768RZSP02A 6768R-AP01A 6768R-AP01C 6768R-GP01J 6768R-SP01P 6768R-BP01C 6768R-LP01C 6768RZVP03A 6768RZGP05A 6768RZJP02A 6768R-JP03A
DESCRIPTION Audio Deck 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 CWN42FR605 TOKYO PIGEON L-DOUB 50-093-4XXXX PIGEON UNIT PCB A 50-093-41234 PIGEON HEAD ASSY 02-083-4266 PIGEON BELT/FELT 02-083-4267 PIGEON BELT/FELT 33-160-4309 PIGEON PRESS CASSE 50-093-41299 PIGEON MOTOR(ASSY 50-222-41226 PIGEON GEAR IDLER 01-082-4598 PIGEON SPRING CWL4 50-219-4014 PIGEON MOLD CWL44 01-081-4601 PIGEON SPRING CWL4 01-082-4688 PIGEON SPRING 50-268-3016 PIGEON ARM CWL44 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 50-093-4780 PIGEON SOLENOID 50-221-31320 PIGEON GEAR ASSY 50-093-31032 PIGEON PULLEY/FLY 50-093-4674 PIGEON PULLEY/FLYW
015 022 023 009
A01 A02 001 002 003 006 007 008 009 011 013
025 009 A02
015 017 018 019
011
020 021 022 023
013
025 037
3-3
3-4
TAPE DECK MECHANISM (A/R & A/S : RIGHT A/R DECK)
021 019 A00 007 008 017 016 018 020
003
015 022
LOCA. NO.
LG PART NO. 6720AG0013A 6768RZHP02A 6768R-PP03A 6768R-QP04A 6768RZGP03A 6768R-SP01F 6768R-MP01C 6768R-SP01A 6768RZSP02A 6768R-AP01A 6768RZGP04A 6768R-AP01C 6768R-GP01J 6768R-SP01P 6768R-BP01C 6768R-LP01C 6768RZVP03A 6768RZGP05A 6768RZJP02A
DESCRIPTION Audio Deck 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 CWN42FR605 TOKYO PIGEON L-DOUB ASSY B-DECK PIGEON HEAD 33-160-4309 PIGEON PRESS CASSE 50-093-41299 PIGEON MOTOR(ASSY 50-222-41226 PIGEON GEAR IDLER 01-082-4598 PIGEON SPRING CWL 50-219-4014 PIGEON MOLD CWL44 01-081-4601 PIGEON SPRING CWL4 01-082-4688 PIGEON SPRING 50-268-3016 PIGEON ARM CWL44 50-093-41399 PIGEON GEAR ASSY 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 50-093-4780 PIGEON SOLENOID 50-221-31320 PIGEON GEAR ASSY 50-093-31032 PIGEON PULLEY/FLY
009
023
A00 A03 003 006 007 008 009
025
011 013 015
009 A03 011
016 017 018 019 020
013
021 022 023 025
3-5
3-6
DECK MECHANISM EXPLODED VIEWS
416
A26
151
159
156 422 165 418 419 153 163 162 417 169 166 417 167 168 155 173
170
164
416
184
177 172 175
3-7
3-8
SPEAKER (MODEL:LMS-U1060/LMS-U560/LMS-U360)
860 RIGHT 850 LEFT A80
853 861 RIGHT 862 RIGHT 859 LEFT 858 857 856 851 LEFT
875
854
852
855
876
- 3-9 -
- 3-10 -