LG LPC-M155X Service Manual

Text of LG LPC-M155X User Guide:

• Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only - 1-4 - ❏ ESD PRECAUTIONS 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 int

• LG LPC-M155X, Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only - 3-7 - Whe laser light Does 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 Ye s Ye s Ye s No No No No No Ye s Ye s B

• LG LPC-M155X, Copyright © 2008 LG Electronics. Inc. All right reserved. 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 PROTECTION CONTROL OUTPUT ON/OFF ASO PROTECTION BANDG AP REFERENCE - + 1 4 2 3 V o V IN Control GND

• LG LPC-M155X, Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only - 3-3 - • LCD CIRCUIT Is CD function selection proper? Dose display 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 0VVDD Reset 3.3V 3.3V 0V Is IC1 pin27, 28 normal (osc)? 0.125usec IC1 pin59, 60, 61,

• LG LPC-M155X, Copyright © 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

• Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only - 3-5 - IF INITIAL READING IS NOT CARRIED OUT (WITH DISC) A 2V 2V 1.2V 0V 0.8V Does disc motor Rotate? Is IC1 pin1 voltage transmitted? Check the change of SL +, SL - Voltage. (IC2 pin 17, 18) Does CON1 pin5 voltage change when Limit S/W ON/OFF. CON1 connector defectiv

• LG LPC-M155X, Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only - 3-4 - Start Power on? Check disc circuitry Check connector CON1, CON2, CON3 Check laser circuitry Check Focus circuitry Check tracking servo circuitry Tracking servo check PN702 1, 4pin check Check power supply circuitr y 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? Ye s Ye s Ye s Ye s Ye s No Ye s No No Ye s Ye s No No • CD PART

• Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service 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 �

• LG LPC-M155X, Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only - 1-1 - [CONTENTS] ❍ SECTION 1.GENERAL • SERVICING PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 • ESD PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 • SPECIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 ❍ SECTION 2. EXPLODED VIEWS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 ❍ SECTION 3.ELECTRICAL SEC

• LG LPC-M155X, Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only - 3-2 - 3. CASSETTE DECK Deck ABNORMAL CN701, ZD901 check Is B + applied to LEAF? Does output signal come out from speaker? CN202 check SW201 check HEAD connector check Does signal come out at IC201 pin4, 11? Does B + come out at Q901 collection? CN202 chec TAPE REC ABNORMAL HEAD connector check CN202 pin3, 4 check Does IC201 pin4, 11 signal come out? Does B + light at leaf switch R203, L204, L203 check Does departure

• LG LPC-M155X, LGE Internal Use OnlyCopyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes 2-1 2-2 SECTION 2. EXPLODED VIEWS A49 A00 450 450 295 294 293 291 290 292 450 460 453 265 454 454 260 260 264 259 254 255 A40 453 252 251 256 250 257 258 253 278 305 A26 450 288 266 289 286 284 310 310 285 287 281 283 263 282 280 453 299 279 302 303 458 300 453 297 278 CABLE1 298 459 301 450 268 455 275 450 273 274 272 267 267 271 304 450 451 452 452 450 456 457 270 315 450 A46 A47 276 277 450 450 261 260 262 454 453 450 453 DECK MAIN POWER 269 296 NOTES) THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT

• LG LPC-M155X, Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only - 1-3 - 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 i

• LG LPC-M155X, MODEL : LPC-M155X , LPC12W SE RVICE MANU AL 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

• LG LPC-M155X, Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only - 3-1 - • MAIN PART 1. AUDIO OUT No power at IC701 pin1, 12 Replace diode Fuse change Is B + applied to pn701? No SW 702 check Ye s Transformer check Is Q703, 704 normal? Fuse open? Replace Q703, 704 No D901~904 normal? Tuner Abnormal Does 4.5V come out at IC101 pin6? SW 702 check Q101, 102 check Does signal come out at pin13, 14? Is B + applied to Q102? Ye s Ye s Ye s Ye s Ye

More Instructions:

LG LPC-M155X Manual  11-12-2022 8

DOWNLOAD

Related Products and Documents (Cassette Player):

Comparable Devices:

Similar Resources:

• JVC KS-FX270 (35 pages) INSTRUCTIONSMANUAL DE INSTRUCCIONESMANUEL D’INSTRUCTIONSFor customer Use:Enter below the Model No. andSerial No. which are located onthe top or bottom of the cabinet.Retain this information for futurereference.Model No.Serial No.GET0008-001A[J]For installation and connections, refer to the separate manual.Para la instalación y las conexiones, refiérase a …

• Radio Shack CTR-109 (16 pages) Cat. No. 14-1116OWNER’S MANUALPlease read before using this equipment.CTR-109AC²DC PortableCassette Recorder14-1116.fm Page 1 Thursday, July 1, 1999 1:44 PM …

• Sanyo MCD-UB685M/AU-2 (8 pages) MCD-UB685M/AU-2 Service Manual REFERENCE No. SM0937018CD Portable Radio Cassette Recorder System FILE NO.PRODUCT CODE No.116422807SpecicationsSpecications subject to change without noticeCD playerChannels: 2-Channel stereoSampling frequency: 44.1 KHzPick-up: Semiconductor laserLaser output: …

• Denon DRR-M33 (14 pages) STEREO CASSETTE TAPE DECKDRR-M33OPERATING INSTRUCTIONSBEDIENUNGSANLEITUNGMODE D’EMPLOIISTRUZIONI PER L’USOINSTRUCCIONES DE OPERACIONGEBRUIKSAANWIJZINGBRUKSANVISNINGFOR ENGLISH READERS PAGE 004 ~ PAGE 013FÜR DEUTSCHE LESER SEITE 014 ~ SEITE 023POUR LES LECTEURS FRANCAIS PAGE 024 ~ PAGE 033PER IL LETTORE ITALIANO PAGINA 034 ~ PAGINA 043PARA LECTORES DE ES …

• Honda Odyssey (6 pages) BLUETOOTH® HANDSFREELINK®Learn how to operate the vehicle’s hands-free calling system.Basic HFL OperationMake and receive phone calls using the vehicle’s audio system, withouthandling your phone. Visit automobiles.honda.com/handsfreelink/ (U.S.) orphone (888) 528-7876 (Canada) to check phone compatibility.To reduce the potential for driver distraction, …

• Philips AZ1605/00 (2 pages) PhilipsCD Soundmachine with Dynamic Bass BoostAZ1605Dual stereo cassettesWith its stereo dual cassette deck, this CD Sound Machine offers extended cassette playing times and high-speed dubbing.Enjoy favourite music from three different sources• Compatible with CD-Recordable and CD-ReWritable• FM/MW/LW stereo tuner• Dual cassette deckBass sound experi …

Comments, Questions and Opinions: