LG Electronics 32LS5620-ZD A. Video error, Lcd Tv, Check various, voltages of Power, or 24V…

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Standard Repair Process

	Error	A. Video error	Established	2012 . 01
LCD TV	Error	A. Video error	date	2012 . 01
LCD TV	symptom	No video/ No audio	Revised date	.14	2/14
		No video/ No audio	Revised date		2/14

No Video/ No audio

☞A4

Check various		Normal Y
voltages of Power		Normal Y
Board ( 3.5V,12V,20V		voltage?
or 24V…)
		N

		Replace Power
		Board and repair
		parts

Check and replace

MAIN B/D

End

Copyright © 2012 LG Electronics. Inc. All rights reserved.	LGE Internal Use Only
Only for training and service purposes

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Contents http//aic.lgservice.com CHASSIS LD21BSERVICE MANUAL READ THE SAFETY PRECAUTIONS IN THIS MANUALSPECIFICATION CONTENTSSAFETY PRECAUTIONS SERVICING PRECAUTIONSIMPORTANT SAFETY NOTICE SAFETY PRECAUTIONSElectrostatically Sensitive ES Devices SERVICING PRECAUTIONSRemoval IC Remove/ReplacementReplacement Small-Signal Discrete Transistor Removal/Replacement3. Test method SPECIFICATION4. Model General Specification 1. Application rangeDVB-S QPSK 2 ~ 45Msymbol/s Symbolrate 4.0Msymbols/s to 7.2Msymbols/ssymbolrate DVB-S2 8PSK / QPSK 2 ~ 45Msymbol/s5.1. Component Input Y, CB/PB, CR/PR 5. Video resolutions 2D5.2. RGB Input PC - LS35/LS34/CS46 series models are not supported PCDVI 5.3. HDMI InputPC/DTV2. Designation ADJUSTMENT INSTRUCTIONBoot file Download 1. Application Range7. ADC Calibration 3.1. ADC Process3.3. EDID data 3.2. EDID Download4.1. Adjustment Preparation 4. Total Assembly line process3.4 Function Check 6. Model name & Serial number D/L 4.3. Outgoing condition Configuration6.1. Signal Table 5. HI-POT TestGP4LOW 7. MAC Address & CI+ key download6.3. Method & notice 7.1 MAC Address7.3. LAN PORT INSPECTIONPING TEST 7.2 LAN Inspectionח ͷͲͳͤͨͩͩͣ͑͢͡͡ ͙;ͧ͛ͽ͑͢͡͝ͳͼ͑͝;ΒΔΙΚΟΖ͚ SCREW ASSEMBLY WORKING GUIDEScrew specification and application situation ח ͷͲͳͤͤͤͪͥͣ͢͡ ͙;ͤ͛ͽͥͦ͑͟͝ͳͼ͑͝;ΒΔΙΚΟΖ͚ ח ͣ͢ͶͲIC101 RearSide LG2111 AG301D Applied Model **LM580T, **560T, **LS350T, **CS460TLS350T/CS460T TDSNLS350S/CS460S 560S, **LS350S, **CS460SG001D EXPLODED VIEW for SYSTEM EEPROM GP4LS7LR22011.12.01Copyright 2012 LG Electronics. Inc. All rights reserved to delete CI or gate forDDR3 Normal PowerVDDC Normal+1.5VDDR FROM LIPS & POWER B/DPowerDET +3.3VNormalIR/LED and control for normal models USB1DIODES USB SIDEUSB2DIODES HDMI FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS 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 LVDS for large inch H5TQ1G63DFR-H9C S7LR2DIVXMS10GP4LS7LR22011/06/03 DDR25612 IC1201SFLASHMAINMACRONIX Serial Flash for SPI bootSFLASHMAINWINBOND IC1401-*1 W25Q80BVSSIG PHONE Headphone *Option HEADPHONEHEAD Option name of this page CISLOT because of Hong Kong CI Region10067972-0500LF GP4LS7LR22011/06/14 ETHERNET21 H/W option ETHERNETETHERNET TDSQ-G001D GP4RGLOBALTUNERBLOCKTU2602TU2603 TDSS-G101D TDSN-G301D TU2601DCDCGND and AGND are connected DVB-S2 LNB Part AllegroOptionLNB GP4LS7LR22011/11/02 DVBS27PSC008-01 SCART / COMPONENT&COMPSITFULL SCART / COMPONENT1 JK2801AUDIO AMPSTA380BWE Page Contents of LCD TV Standard Repair Process Content Contents of LCD TV Standard Repair Process Detail Technical ManualContinue to the next page Error symptomA2 Check Power Board 24v output A. Video errorLCD TV Main B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D Cableor 24V… voltages of PowerCheck various Board 3.5V,12V,20VMenu→ Set up→ Support → Signal Test Signal strength Normal over 50% By using Digital signal level meter By using Diagnostics menu on OSDSignal Quality Normal over 50% → Set-Top-Box, Different maker TV etc Link Cable A8/ A9Check color by input -External Input COMPONENT -RGB ※ CheckCheck color condition by input -External Input -Component RGB External device screen error-Color errorVertical/Horizontal bar, residual image, light spot Connect other external device and cableMeasure voltage of each output of Power B/D B. Power errorCheck Power LED Check Power On ‘”High”POWEROFFCPUABNORMAL Check Power Off ModeIf Power Off mode is not displayed Check Power B/D voltage POWEROFFABNORMAL1Check audio B+ C. Audio error24V of Power Check user menu Speaker offCheck audio B+ Voltage In case of External Input signal error Check and fix external device1. Remote controlR/C operating error D. Function errorCheck & Repair Replace Main B/D Check input signalY Check technical Signal information input? - Fix information Recognition errorIdentify nose type E. NoiseF. Exterior defect

Check various

voltages of Power

Board ( 3.5V,12V,20V

or 24V…)