LG Electronics 32LS679C-ZC B. Power error, Lcd Tv, Check Power Off Mode, POWEROFFABNORMAL1

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Check Power Off Mode

Standard Repair Process

 

 

Error

B. Power error

Established

2012. 01 .14

 

 

LCD TV

date

 

 

symptom

Off when on, off while viewing, power auto on/off

Revised date

 

8/14

 

 

 

 

 

 

 

 

 

 

 

Check outlet

☞A14

Check A/C cord

Check for all 3- phase power out

N

Error?

Y

Check Power Off Mode

CPU

Abnormal

Abnormal 1

Replace Main B/D

Normal? Y End

N

Replace Power B/D

Fix A/C cord & Outlet and check each 3 phase out

☞A13

(If Power Off mode is not displayed) Check Power B/D voltage

※Caution

Check and fix exterior of Power B/D Part

Normal Y voltage?

(If Power Off mode is not displayed) Check Power B/D voltage N

Replace Power B/D

Replace Main B/D

*Please refer to the all cases which can be displayed on power off mode.

Status

Power off List

Explanation

 

"POWEROFF_REMOTEKEY"

Power off by REMOTE CONTROL

 

"POWEROFF_OFFTIMER"

Power off by OFF TIMER

 

"POWEROFF_SLEEPTIMER"

Power off by SLEEP TIMER

 

"POWEROFF_INSTOP"

Power off by INSTOP KEY

 

"POWEROFF_AUTOOFF"

Power off by AUTO OFF

Normal

"POWEROFF_ONTIMER"

Power off by ON TIMER

 

"POWEROFF_RS232C"

Power off by RS232C

 

"POWEROFF_RESREC"

Power off by Reserved Record

 

"POWEROFF_RECEND"

Power off by End of Recording

 

"POWEROFF_SWDOWN"

Power off by S/W Download

 

"POWEROFF_UNKNOWN"

Power off by unknown status except listed case

Abnormal

"POWEROFF_ABNORMAL1"

Power off by abnormal status except CPU trouble

"POWEROFF_CPUABNORMAL"

Power off by CPU Abnormal

Copyright © 2012 LG Electronics. Inc. All rights reserved.

LGE Internal Use Only

Only for training and service purposes

 

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Page 46 Page 48
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/s5.2. RGB Input PC 5. Video resolutions 2D5.1. Component Input Y, CB/PB, CR/PR 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 Download3.4 Function Check 4. Total Assembly line process4.1. Adjustment Preparation 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 ͣ͢ͶͲLG2111 A BLOCK DIAGRAMRear SideEXPLODED 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 USB2DIODES USB SIDEUSB1DIODES 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-RADIATIONFor Comsumer model, use 4PIN Wafer RS-232CCOMMERCIAL/NonOS MODEL OPTION COMMERCIAL MODEL OPTION LVDS for large inch H5TQ1G63DFR-H9C S7LR2DIVXMS10GP4LS7LR22011/06/03 DDR25612 IC1201SFLASHMAINWINBOND IC1401-*1 W25Q80BVSSIG Serial Flash for SPI bootSFLASHMAINMACRONIX HEAD Headphone *Option HEADPHONEPHONE 10067972-0500LF CI RegionOption name of this page CISLOT because of Hong Kong ETHERNET H/W option ETHERNETGP4LS7LR22011/06/14 ETHERNET21 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,20VSignal Quality Normal over 50% By using Digital signal level meter By using Diagnostics menu on OSDMenu→ Set up→ Support → Signal Test Signal strength 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 deviceCheck & Repair D. Function error1. Remote controlR/C operating error Replace Main B/D Check input signalY Check technical Signal information input? - Fix information Recognition errorIdentify nose type E. NoiseF. Exterior defect
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