LG LPC-M155X Service Manual Download Page 1

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MODEL

LPC-M155X , LPC12W

SE
R

VICE MANU

PORTABLE CD CASSETTE
RECORDER

SERVICE MANUAL

CAUTION

BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL.

MODEL :

LPC-M155X , LPC12W

Website http://biz.lgservice.com

Internal Use Only

P/NO : AFN62795896

NOVEMBER, 2008

Summary of Contents for LPC-M155X

Page 1: ... MANUAL PORTABLE CD CASSETTE RECORDER SERVICE MANUAL CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL MODEL LPC M155X LPC12W Website http biz lgservice com Internal Use Only P NO AFN62795896 NOVEMBER 2008 ...

Page 2: ...SECTION 1 GENERAL SERVICING PRECAUTIONS 1 2 ESD PRECAUTIONS 1 4 SPECIFICATION 1 5 SECTION 2 EXPLODED VIEWS 2 1 SECTION 3 ELECTRICAL SECTION TROUBLESHOOTING GUIDE 3 1 INTERAL BLOCK DIAGRAM OF ICs 3 8 WIRING DIAGRAM 3 15 BLOCK DIAGRAM 3 17 SCHEMATIC DIAGRAMS 3 19 PRINTED CIRCUIT BOARD DIAGRAM 3 21 SECTION 4 REPLACEMENT PARTS 4 1 ...

Page 10: ... 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 2 5 PACKING ACCESSORY SECTION Packing Packing Box 803 802 803 Instruction Ass y 801 Bag 804 305 Power Cord ...

Page 14: ...y LCD then light Check LCD supply power in the power circuitry Is IC1 reset circuit normal Supply circuitry defective Supply circuitry defective IC1 surrounding circuit defective X1 defective Pattern defective LCD light defective 0V VDD Reset 3 3V 3 3V 0V Is IC1 pin27 28 normal osc 0 125usec IC1 pin59 60 61 62 output wareform normal 3 3V Yes Yes No No Yes No Yes No Yes No ...

Page 15: ...r CON1 CON2 CON3 Check laser circuitry Check Focus circuitry Check tracking servo circuitry Tracking servo check PN702 1 4pin check Check power supply circuitry IC4 1 4pin 7 2V IC4 2pin 3 3V IC1 12 16 25 50 64 73 98pin 3 3V IC1 19 29 37 63 66pin 1 6V Does initial read work Does it play OK Is audio output supplied Yes Yes Yes Yes Yes No Yes No No Yes Yes No No CD PART ...

Page 18: ...oes lenses move up and down Is signal output at focus search ferminal Is signal output at CON3 pin13 16 FC FC Is IC1 pin95 FEI signal output Is IC1 pin94 SBAD signal output IC1 defective IC2 defective Autuator short Connecter short Connecter short IC1 defective Laser diode degraded Pick up defective Yes Yes Yes No No No No No Yes Yes B ...

Page 19: ...ed Only for training and service purposes LGE Internal Use Only 3 8 INTERAL BLOCK DIAGRAM OF ICs AT24C32 BLOCK DIAGRAM KIA278R33P1 BLOCK DIAGRAM OVER HEAT PROTECTI ON CONTROL OUTPUT O N OFF ASO PROTECTI ON BANDGAP REFERENCE 1 4 2 3 Vo VIN Contr ol GND ...

Page 22: ...ce purposes LGE Internal Use Only 3 11 Optical Pickup 4ch Driver with MUTE MM1469 CD processor MP3 WMA decoder audio DAC and system controlling MCU TC94A77FG 203 16 9MHz Panel keys Analog Audio Output LCD Display RPT PROG ALBUM ALL SYNC WMA MP3 RANDOM TC94A77FG SYSTEM BLOCK DIAGRAM ...

Page 28: ...nal Use Only Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes 3 19 3 20 SCHEMATIC DIAGRAMS 2007 06 12 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 ...