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LG LM-U360, Service Manual

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LG LM-U360 Service Manual Download Page 36

- 2-29 -

IS ?V APPLIED TO PIN10 OF
PN801
LASER SUPPLY VOLTAGE
CHECK

IS 2.3 V PIN18(LDO) OF
IC801 LASER CONTROL
VOLTAGE CHECK

CHECK PN801 
CONNECTOR LINE

DEFECTIVE PN801
CONNECTOR

DEFECTIVE PICKUP
LASER PART

IS 3.3 V APPLIED TO PIN30,
36, 39, 41, 61, 68, 75 OF
IC801
RF IC SUPPLY VOLTAGE
CHECK

DEFECTIVE IC804

DEFECTIVE IC801

DEFECTIVE Q801 OR
D801

■

READING OK CHECK #C (= “NO DISC” DISPLAY)

C

Summary of Contents for LM-U360

Page 1: ...3CD CHANGER MINI Hi Fi SYSTEM SERVICE MANUAL MODEL LM U360 LMS U360 LM U365 LMS U365 SERVICE MANUAL P NO AFN31223617 JULY 2006 MODEL LM U360 LMS U360 LM U365 LMS U365 ...

Page 2: ... 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 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 SECTION 4 REPLACEMENT PARTS LIST REPLACEMENT PARTS LIST 4 1 ...

Page 3: ...ver 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 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 t...

Page 4: ...tive 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 Ω 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 ...

Page 5: ...harges 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 comparabl...

Page 6: ...S U1560W SUB WOOFER 100W 100W LM U1060 50W 50W LM U560 30W 30W LM U360 T H D 0 5 Frequency Response 40 20000 Hz Signal to noise ratio 75 dB TAPE Tape Speed 4 75cm sec Wow Flutter 0 25 MTT 111 JIS WTD F F REW Time 120sec C 60 Frequency Response 250 8000Hz Signal to Noise Ratio 43dB Channel Separation 50dB P B 45dB R P Erase Ratio 55dB MTT 5513 SPEAKERS MODEL LMS U1560 LMS U1560W LMS U560 LMS U360 L...

Page 7: ... 1 6 ...

Page 8: ...heck Refer to SMPS Troubleshooting Check if IC101 KIA7042 input is over 5V Check if IC101 KIA7042 input is over 4 3V IC101 KIA7042 relevant parts check relevant parts replacement normal IC101 KIA7042 IC100 78KO KF2 1 PIN Power Check normal YES NO NO NO NO YES YES YES YES MICOM PART CHECK I ...

Page 9: ...ment relevant parts check normal IC 103 8PIN IC 100 19 20 59 PIN 5V check X101 32 768KHz X100 9 8304MHz operation status check normal P7904 5PIN 5 6V check Refer to SMPS Troubleshooting Output 5V operation check D101 1SR35 relevant parts check normal relevant parts replacement D101 1SR35 both terminal power check Q101 EMITTER 5V check and COLLECTO NO NO NO NO NO YES YES YES YES YES YES YES YES YES...

Page 10: ...to SMPS Troubleshooting P7302 assembly check Each PIN power check normal relevant parts replacement normal P7904 1 2 3 power check F1 F2 both terminal 5V and above VKK power is over 26V P7302 connection status check and power check F F2 both termainal 5V or above VKK 26V or above power check IC301 PT6324 Power check 50 PIN VKK 26V 9 51 PIN 5V YES YES YES YES YES YES YES YES YES YES NO NO NO NO NO ...

Page 11: ...f 5V defective D321 SR35 input and output power check relevant parts check 76 PIN DATA input check relevant parts check relevant parts replacement normal relevant parts replacement normal FLT light on normal IC100 STB 75 PIN STB DO 77 PIN 4PIN DO CLK 78 PIN 1PIN CLK Data output check YES YES YES YES YES YES YES YES NO NO NO NO ...

Page 12: ...r check 3 10 22 29 39 47 56 65 72 87 94 Refer to SMPS Troubleshooting relevant parts check X604 12 288MHz normal R668 470Ω output check normal LINE resistance check DATA R671 CLK R670 RST R665 normal CD ASS Y PS9829 communi cation status check P7403 IC604 PS9829 DATA input check normal IC604 PS9829 parts check relevant parts replacement relevant parts replacement relevant parts replacement Refer t...

Page 13: ...6 17 18 19 PIN 12V input power check PWM MODULATOR input power check Each IC 4 6 14 16 PIN POWER IC 700 701 702 703 34 29 27 20 PIN output check Output LINE COIL check normal Refer to SMPS Troubleshooting Each LINE resistance output power check IC700 R702 701 726 727 724 IC701 R730 729 750 753 752 Only LM U1560 relevant parts replacement YES YES YES YES YES YES NO NO NO ...

Page 14: ...ins 1 7 output check IC603 CS5340 Pins10 12 input check normal IC200 BU4052 16PINVDD 8PIN VSS power check µ COM IC100 3 6PIN Communication check Refer to SMPS Troubleshooting IC603 Pins2 7 8 check relevant parts replacement IC801 MC4580 4PIN VSS 8PIN VDD power check relevant parts replacement IC603 Pin4 SDout check Relevant Part repplacement YES YES YES YES YES YES YES YES YES NO NO NO NO NO NO ...

Page 15: ...heck IC801 MC4580 2 6PIN input waveform check TAPE PCB ASS Y IC801 MC4580 2 6PIN input check IC200 BU4052 2 1 5PIN input waveform check IC200 BU4052 3 13PIN output check IC601 BU4052 2 15PIN input waveform check YES YES YES IC801 MC4580 Pins 1 7 input check YES IC603 CS95340 Pins10 12 input check YES IC801 MC4580 Pins 1 7 input check IC603 CS95340 Pins10 12 input check YES YES YES YES YES NO NO YE...

Page 16: ...operation check normal Refer to SMPS Troubleshooting DECK HEAD input check DECK HEAD input IC201 32 39 PIN check HEAD WIRE or Mecha replacement relevant parts replacement relevant parts replacement relevant parts check normal IC202 10 PIN HIGH operation check relevant parts check normal YES YES YES YES YES YES YES YES YES NO NO NO NO NO NO ...

Page 17: ...GH check IC202 4 PIN HIGH operation check Refer to SMPS Troubleshooting relevant parts replacement relevant parts replacement normal P7207 2 4 output check P2707 5 7 input check IC203 MC4580 1 7 check IC201 7 24 PIN REC input check IC201 10 21 PIN output check L203 2 3 PIN oscillation check P2203 5 3 PIN input check 8 PIN ERASE input check normal YES YES YES YES YES YES YES YES YES YES YES YES NO ...

Page 18: ... OK Chcek the DC VOf C950 C951 If DC V is in 35V 35V Chcek the DC V Of C909 C903 C921 If DC V is in 14 19V and it is steady Replace the fuse Check BD901 LF901 902 Check IC901 902 Replace IC 901 902 Check short of P9702 line Check short of P9701 line Check short of P9701 P9702 line MAIN PART YES NO YES YES YES YES YES NO NO NO NO NO ...

Page 19: ...the PIN6 OF P9702 If DC V is over 5 6V OK Check power circuit Trouble shooting P SENS PART OPTIONAL PART Check the PIN3 OF P9702 If DC V is over 28V 2 OK Check power circuit Trouble shooting VKK PART YES YES NO NO ...

Page 20: ... 2 13 INTERNAL BLOCK DIAGRAM of ICs UTC MC4580 PIN CONFIGURATION TEST CIRCUIT ...

Page 21: ... 2 14 FAN8082D Internal Block Diagram ...

Page 22: ... 2 15 BU2090 Block diagram ...

Page 23: ... 2 16 BA3308 BA3308F BLOCK DIAGRAM BA3308 BA3308F ...

Page 24: ... 2 17 HT1200 4 SYSTEM BLOCK DIAGRAM ...

Page 25: ... 2 18 HT1200 4 FUNCTIONAL BLOCK DIAGRAM ...

Page 26: ... 2 19 CS5340 BLOCK DIAGRAM BU4052 BLOCK DIAGRAM ...

Page 27: ... 2 20 HA12237F BLOCK DIAGRAM ...

Page 28: ... 2 21 PT6324 BLOCK DIAGRAM ...

Page 29: ...R ON DOES CD APPEAR AT FLD DOES DISK1 APPEAR AT FLD CHECK THE VOLTAGE OF EACH PIN ON P5701 CHECK CD MD MODULE CHECK CONNECTOR P7501 RECONNECT IT OK DOES AUX FM 87 5 APPEAR AT FLD DOES IT APPEAR CD ERROR AT FLD PUSH KARAOKE CD BUTTON CHECK CONNECTOR P4703 P4004 P5701 OK DOES NO DISC OR TIME ARE APPEARED AT FLD ...

Page 30: ...ECH Vtg PN805 PIN22 CLOSE PIN23 OPEN CONNECTOR CHECK PN802 PN803 PN804 CN806 PN814 CHECK MICOM INTERFACE CIRCUIT PN805 CE BTL MUTE CD IN CDOUT CLK WRQ FSEQ CONNECTOR CHECK PN801 PN802 CHECK PICKUP MOVEMENT CHECK AM5810FP IC802 CHECK LC78692 IC801 CHECK PN805 AUDIO DATA PIN10 DA_LRCK IC801 PIN60 LRSY PIN11 DA_BCK IC801 PIN59 DATACLK PIN12 DA_DATA0 IC801 PIN58 DATA CD PART ...

Page 31: ...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 CHECK VOLTAGE CHANGE LO LO OF IC803 PN805 PIN23 OPEN PIN22 CLOSE DEFECTIVE MECHANISM DEFECTIVE MICOM DEFECTIVE IC803 OPEN CLOSE NG ...

Page 32: ...GE THE PIN 2 OF IC804 IC804 PIN2 3 3V CHECK RESET SIGNAL OF PN805 PN805 PIN19 5V 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 IC801 DEFECTIVE IC804 DEFECTIVE MICOM OR CONNECTOR DEFECTIVE MICOM OR CONNECTOR READING DISPLAY CHECK ONLY CD DISPLA...

Page 33: ...LE ROTATE IS READING OK DEFECTIVE PICKUP OR IC802 OR IC801 CHECK PN801 PIN 13 16 FA FA A B C D E DEFECTIVE PICKUP OR IC802 OR IC801 CHECK PN801 PIN 10 LD CHECK PN802 PIN 5 6 SP SP CHECK PN801 PIN 14 15 TA TA DEFECTIVE PICKUP OR IC801 DEFECTIVE PICKUP OR IC802 OR IC801 DEFECTIVE PICKUP OR IC802 OR IC801 READING OK CHECK NO DISC DISPLAY ...

Page 34: ...802 PIN3 WAVE FORM 2 SLED MOTOR WAVE DEFECTIVE IC802 CHECK PN802 CONNECTOR LINE DEFECTIVE PICKUP SLED MOTOR DOES SLIN WAVEFORM APPEAR AT IC802 PIN5 WAVEFORM 2 SLED DRIVE WAVE DEFECTIVE IC801 DEFECTIVE PN802 CONNECTOR READING OK CHECK A NO DISC DISPLAY A ...

Page 35: ...13 WAVE FORM 3 FOCUS COIL DRIVE WAVE DEFECTIVE IC802 CHECK PN801 CONNECTOR LINE DEFECTIVE PICKUP FOCUS ACTUATOR DOES FAINWAVEFORM APPEAR AT IC802 PIN 25 WAVEFORM 3 FOCUS DRIVE WAVE DEFECTIVE IC801 DEFECTIVE PN801 CONNECTOR READING OK CHECK B NO DISC DISPLAY B ...

Page 36: ... IC801 LASER CONTROL VOLTAGE CHECK CHECK PN801 CONNECTOR LINE DEFECTIVE PN801 CONNECTOR DEFECTIVE PICKUP LASER PART IS 3 3 V APPLIED TO PIN30 36 39 41 61 68 75 OF IC801 RF IC SUPPLY VOLTAGE CHECK DEFECTIVE IC804 DEFECTIVE IC801 DEFECTIVE Q801 OR D801 READING OK CHECK C NO DISC DISPLAY C ...

Page 37: ...5 WAVE FORM 4 SPINDLE MOTOR DRIVE WAVE DEFECTIVE IC802 CHECK PN802 CONNECTOR LINE DEFECTIVE PN802 CONNECTOR DEFECTIVE PICKUP SPINDLE MOTOR DOES SPIN WAVEFORM APPEAR AT IC802 PIN6 WAVEFORM 4 SPINDLE DRIVE WAVE DEFECTIVE IC801 READING OK CHECK D NO DISC DISPLAY D ...

Page 38: ...TOR LINE DEFECTIVE PN802 CONNECTOR DOES ARF SIGNAL APPEAR IC801 PIN 2 WAVEFORM 6 DOES TAINWAVEFORM APPEAR AT IC802 PIN 22 WAVEFORM 5 TRACKING DRIVE WAVE DEFECTIVE IC801 DEFECTIVE PICKUP OR IC801 DOES FE TE SIGNAL APPEAR IC801 PIN10 RFMON PIN16 TE WAVEFORM 6 REMON IS FE DEFECTIVE PICKUP OR IC801 READING OK CHECK E NO DISC DISPLAY E ...

Page 39: ...K OK CHECK POWER SUPPLY CIRCUIT CN806 CHECK PN810 1 PIN 5V CHECK PN810 PIN 2 D 3 D CHECK OTI6888 IC805 CHECK SIGNAL STCK STREQ STDATA STCK IC805 PIN52 IC801 PIN 55 STREQ IC805 PIN53 IC801 PIN 54 STDATA IC805 PIN54 IC801 PIN 56 CONNECTOR CHECK CN806 CHECK MICOM INTERFACE CIRCUIT PN805 PIN13 RX IC805 PIN49 TXD PIN14 TX IC805 PIN33 RXD ...

Page 40: ... 15 DO IC801 PIN45 DATA IN 2 MICOM INTERFACE WAVEFORM PN805 PIN 26 19 3 15 DURING NORMAL PLAY PIN 26 WRQ PIN 19 RESET PIN 3 DI IC801 PIN46 DATA OUT PIN 15 DO IC801 PIN45 DATA IN 1 MICOM INTERFACE WAVEFORM PN805 PIN 4 1 18 DURING POWER ON PIN 1 CE PIN 4 CL PIN 18 FSEQ 1 MICOM INTERFACE WAVEFORM PN805 PIN 4 1 18 DURING NORMAL PLAY PIN 4 CL PIN 1 CE PIN 18 FSEQ ...

Page 41: ... WAVEFORM PN805 PIN 26 19 3 15 DURING NORMAL PLAY PIN 26 WRQ 3 FOCUS DRIVE AND MOTOR WAVEFORM IC802 PIN 25 IC802 PIN 16 WHEN FOCUS SEARCH FAILED OR THERE IS NO DISC ON TRAY 3 FOCUS DRIVE AND MOTOR WAVEFORM IC802 PIN 25 IC802 PIN 16 THERE IS DISC ON TRAY AND FOCUS SEARCH SUCCESS PIN 5 SLIN PIN 13 SL PIN 25 FAO PIN 25 FAO PIN 16 FA PIN 16 FA ...

Page 42: ...ORM IC802 PIN 6 11 WHEN TOC READING PIN 11 SP PIN 6 SPIN 5 TRACK DRIVE AND MOTOR WAVEFORM IC802 PIN 22 IC802 PIN 17 DURING NORMAL PLAY PIN 22 TAO PIN 17 TA 6 RF FOCUS AND TRACKING ERROR WAVEFORM IC801 PIN 2 10 16 DURING NORMAL PLAY PIN 2 RFOUT PIN 10 RFMON FE PIN 16 TE ...

Page 43: ......

Page 44: ... 6850R H322A EAD30732801 15P 563 935H 6850R H020A 561 715H B C A C B E E B A C B G A A B B C D A C B E D E F A G F D C D F G A C B E D F F G FRONT EAD30732401 EAD30731701 561 7073 DECK 561 844G 561 715C 6630XF00415 561 715H SMPS 6631R F039K 6631R E108H CD 561 711C 561 711E 6630XE00130 561 715D 561 711F 6630XE00816 MAIN 561 7150 6630XE00130 561 711H 6630XF00429 561 843G A A B C A B D E 2 36 2 37 ...

Page 45: ...GH NORM EXP CLK DATA TUNER MODULE PLL DAT CLK RDS DATA CLK 4052 Switch IC TAPE L R TUNER L R AUX L R OP AMP CS5340 OP AMP LEVEL METER OP AMP REC L R CS5340 REST CE DI DO CLK WRQ FSEQ MIC INPUT AUX INPUT SUB WOOFER HEAD PHONES 12 28MHz BU4052 DATA D D VFD DATA CLK LRCK BCK SDA TA0 CS5340 CLK DATA H P_SW PWM OUT CD SANYO LC78692W New Version LM U1560 FLD DISPLAY VFD DRIVE IC PT6324 LM U1560 2 1CH 10...

Page 46: ...2 40 2 41 SCHEMATIC DIAGRAMS MAIN SCHEMATIC DIAGRAM A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T ...

Page 47: ...2 42 2 43 AMP SCHEMATIC DIAGRAM A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T ...

Page 48: ...2 44 2 45 FRONT SCHEMATIC DIAGRAM A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T ...

Page 49: ...2 46 2 47 DECK SCHEMATIC DIAGRAM A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T ...

Page 50: ...2 48 2 49 CD SCHEMATIC DIAGRAM A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T ...

Page 51: ...2 50 2 51 USB SCHEMATIC DIAGRAM A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T ...

Page 52: ...ERED WITHOUT PERMISSION FROM THE LG ELECTRONICS CORPORATION ALL COMPONENTS SHOULD BE REPLACED ONLY WITH TYPES IDENTICAL TO THOSE IN THE ORIGINAL CIR CUIT SPECIAL COMPONENTS ARE SHADED ON THE SCHEMATIC FOR EASY IDENTIFICATION THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIF FER FROM THE ACTUAL CIRCUIT USED THIS WAY IMPLEMENTATION OF THE LATEST SAFETY AND PERFORMANCE IMPROVEMENT CHANGES INTO THE SET IS NOT...

Page 53: ...2 54 2 55 PRINTED CIRCUIT DIAGRAMS MAIN P C BOARD TOP VIEW ...

Page 54: ...2 56 2 57 MAIN P C BOARD BOTTOM VIEW ...

Page 55: ...2 58 2 59 FRONT P C BOARD ...

Page 56: ...2 60 2 61 SMPS P C BOARD DECK P C BOARD BOTTOM VIEW TOP VIEW ...

Page 57: ...2 62 2 63 CD P C BOARD TOP VIEW ...

Page 58: ...2 64 2 65 CD P C BOARD BOTTOM VIEW ...

Page 59: ......

Page 60: ...0 A41 A26 A46 264 450 A47 A40 289 267 290 454 291 300 266 451 263 451 258 256 255 254 252 288 250 251 255 257 451 A00 253 CABLE2 CABLE3 TUN800 CABLE1 CN201 3 1 3 2 3 1 3 2 SECTION 3 EXPLODED VIEWS CABINET AND MAIN FRAME SECTION ...

Page 61: ...SP01F Deck Mechanism Parts 01 082 4598 PIGEON SPRING CWL4 009 6768R MP01C Deck Mechanism Parts 50 219 4014 PIGEON MOLD CWL44 011 6768R SP01A Deck Mechanism Parts 01 081 4601 PIGEON SPRING CWL4 013 6768RZSP02A Deck Mechanism Parts 01 082 4688 PIGEON SPRING 015 6768R AP01A Deck Mechanism Parts 50 268 3016 PIGEON ARM CWL44 017 6768R AP01C Deck Mechanism Parts 50 239 4072 PIGEON ARM CWL44 018 6768R GP...

Page 62: ...EON MOLD CWL44 011 6768R SP01A Deck Mechanism Parts 01 081 4601 PIGEON SPRING CWL4 013 6768RZSP02A Deck Mechanism Parts 01 082 4688 PIGEON SPRING 015 6768R AP01A Deck Mechanism Parts 50 268 3016 PIGEON ARM CWL44 016 6768RZGP04A Deck Mechanism Parts 50 093 41399 PIGEON GEAR ASSY 017 6768R AP01C Deck Mechanism Parts 50 239 4072 PIGEON ARM CWL44 018 6768R GP01J Deck Mechanism Parts 50 222 4428 PIGEON...

Page 63: ...3 7 3 8 DECK MECHANISM EXPLODED VIEWS 416 151 156 418 169 173 170 419 163 422 165 159 164 417 417 416 166 167 177 175 172 162 153 168 155 184 A26 ...

Page 64: ... 3 9 SPEAKER MODEL LMS U1060 LMS U560 LMS U360 851 861 RIGHT LEFT 853 A80 852 854 855 856 859 862 857 858 850 860 RIGHT LEFT 875 876 LEFT RIGHT ...

Page 65: ... 3 10 ...

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