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LG Electronics 32LS679C-ZC service manual CHASSIS LD21B, Led Lcd Tv, Service Manual, Asia/Oceania

Models: 32LS679C-ZC

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		Internal Use Only
North/Latin America	http://aic.lgservice.com
Europe/Africa	http://eic.lgservice.com
Asia/Oceania	http://biz.lgservice.com

LED LCD TV

SERVICE MANUAL

CHASSIS : LD21B

MODEL : 32LS679C 32LS679C-ZC

CAUTION

BEFORE SERVICING THE CHASSIS,READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

P/NO : MFL67360739 (1209-REV00)	Printed in Korea

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LG Electronics service manual CHASSIS LD21B, Led Lcd Tv, Service Manual, MODEL 32LS679C 32LS679C-ZC, Internal Use Only

Contents

SERVICE MANUAL CHASSIS LD21BREAD THE SAFETY PRECAUTIONS IN THIS MANUAL http//aic.lgservice.comSAFETY PRECAUTIONS CONTENTSSERVICING PRECAUTIONS SPECIFICATIONIMPORTANT SAFETY NOTICE SAFETY PRECAUTIONSElectrostatically Sensitive ES Devices SERVICING PRECAUTIONSReplacement IC Remove/ReplacementSmall-Signal Discrete Transistor Removal/Replacement Removal4. Model General Specification SPECIFICATION1. Application range 3. Test methodSymbolrate 4.0Msymbols/s to 7.2Msymbols/s Specificationsymbolrate DVB-S2 8PSK / QPSK 2 ~ 45Msymbol/s5.1. Component Input Y, CB/PB, CR/PR 5. Video resolutions 2D5.2. RGB Input PC PCDVI 5.3. HDMI InputPC/DTVBoot file Download ADJUSTMENT INSTRUCTION1. Application Range 2. Designation3.3. EDID data 3.1. ADC Process3.2. EDID Download 7. ADC Calibration4.1. Adjustment Preparation 4. Total Assembly line process3.4 Function Check 6.1. Signal Table 4.3. Outgoing condition Configuration5. HI-POT Test 6. Model name & Serial number D/L6.3. Method & notice 7. MAC Address & CI+ key download7.1 MAC Address GP4LOW7.3. LAN PORT INSPECTIONPING TEST 7.2 LAN InspectionScrew specification and application situation SCREW ASSEMBLY WORKING GUIDEOnly for training and service purposes ח ͷͲͳͤͤͤͪͥͣ͢͡ ͙;ͤ͛ͽͥͦ͑͟͝ͳͼ͑͝;ΒΔΙΚΟΖ͚ ח ͣ͢ͶͲRear BLOCK DIAGRAMSide LG2111 AEXPLODED VIEW GP4LS7LR22011.12.01 Only for training and service purposesCopyright 2012 LG Electronics. Inc. All rights reserved LGE Internal Use OnlyOnly for training and service purposes Normal PowerVDDC NormalPowerDET FROM LIPS & POWER B/D+3.3VNormal +1.5VDDROnly for training and service purposes IR/LED and control for normal modelsTHE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC Copyright 2012 LG Electronics. Inc. All rights reservedUSB1DIODES USB SIDEUSB2DIODES Only for training and service purposesOnly for training and service purposes HDMITHE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC Copyright 2012 LG Electronics. Inc. All rights reservedOnly for training and service purposes RGB-PC / SPDIFTHE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATIONCOMMERCIAL/NonOS MODEL OPTION COMMERCIAL MODEL OPTION RS-232CFor Comsumer model, use 4PIN Wafer Only for training and service purposesOnly for training and service purposes LVDS for large inchTHE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC Copyright 2012 LG Electronics. Inc. All rights reservedS7LR2DIVXMS10 Only for training and service purposesGP4LS7LR22011/06/03 DDR25612 Copyright 2012 LG Electronics. Inc. All rights reservedOnly for training and service purposes Serial Flash for SPI bootCopyright 2012 LG Electronics. Inc. All rights reserved LGE Internal Use OnlyOnly for training and service purposes Headphone *Option HEADPHONECopyright 2012 LG Electronics. Inc. All rights reserved LGE Internal Use OnlyOption name of this page CISLOT because of Hong Kong CI RegionOnly for training and service purposes THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESGP4LS7LR22011/06/14 ETHERNET21 H/W option ETHERNETOnly for training and service purposes ETHERNETOnly for training and service purposes GP4RGLOBALTUNERBLOCKTU2602TU2603 TDSS-G101D TDSN-G301D TU2601OptionLNB DVB-S2 LNB Part AllegroGP4LS7LR22011/11/02 DVBS27 Only for training and service purposesFULL SCART / COMPONENT1 SCART / COMPONENT&COMPSITOnly for training and service purposes THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATESOnly for training and service purposes AUDIO AMPSTA380BWETHE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC Copyright 2012 LG Electronics. Inc. All rights reservedPage Contents of LCD TV Standard Repair Process Continue to the next page Contents of LCD TV Standard Repair Process Detail Technical ManualError symptom ContentLCD TV A. Video errorMain B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable A2 Check Power Board 24v outputvoltages of Power A. Video errorOnly for training and service purposes LCD TVBy using Digital signal level meter By using Diagnostics menu on OSD A. Video errorMenu→ Set up→ Support → Signal Test Signal strength Normal over 50% Signal Quality Normal over 50%LCD TV A. Video error→ Set-Top-Box, Different maker TV etc A. Video error A8/ A9LCD TV Check color by input -External Input COMPONENT -RGBA. Video error External device screen error-Color errorVertical/Horizontal bar, residual image, light spot LCD TVCheck Power LED B. Power errorCheck Power On ‘”High” Measure voltage of each output of Power B/DCheck Power Off Mode B. Power errorIf Power Off mode is not displayed Check Power B/D voltage POWEROFFABNORMAL124V of Power C. Audio errorLCD TV Check user menu Speaker offIn case of External Input signal error Check and fix external device C. Audio errorLCD TV Check audio B+ Voltage1. Remote controlR/C operating error D. Function errorLCD TV Check & RepairCheck input signal D. Function errorY Check technical Signal information input? - Fix information Recognition errorLCD TV E. NoiseIdentify nose type LCD TV F. Exterior defect