LG Electronics 32LS350T-ZA, 32LS359T-ZC A. Video error, Lcd Tv, Signal Quality Normal over 50%

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. By using Digital signal level meter

Standard Repair Process

 

 

Error

A. Video error

Established

2012. 01 .14

 

 

 

LCD TV

date

 

 

 

symptom

Picture broken/ Freezing

Revised date

 

3/14

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A5

Check RF Signal level

. By using Digital signal level meter

. By using Diagnostics menu on OSD

( Menu→ Set up→ Support → Signal Test )

-Signal strength (Normal : over 50%)

-Signal Quality (Normal: over 50%)

Normal

Y

Check whether other equipments have problem or not.

(By connecting RF Cable at other equipment)

Signal?

DVD Player ,Set-Top-Box, Different maker TV etc`

( Menu→ Set up→ Support → Signal Test ) N

Check RF Cable

Connection

1.Reconnection

2.Install Booster

N

Normal Y Picture?

N

A6

Check

S/W Version

SVC N

Bulletin?

Y

S/W Upgrade

Check

Normal

Y

Close

Tuner soldering

Picture?

 

 

N

 

Normal Picture?

Y

Close

Contact with signal distributor or broadcaster (Cable or Air)

Normal N Picture?

-Signal Quality (Normal: over 50%) Y

Close

Replace

Main B/D

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

LGE Internal Use Only

Only for training and service purposes

 

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Contents READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS LD21CSERVICE MANUAL http//aic.lgservice.comSERVICING PRECAUTIONS CONTENTSSAFETY PRECAUTIONS SPECIFICATIONSAFETY PRECAUTIONS IMPORTANT SAFETY NOTICESERVICING PRECAUTIONS Electrostatically Sensitive ES DevicesSmall-Signal Discrete Transistor Removal/Replacement IC Remove/ReplacementReplacement Removal1. Application range SPECIFICATION4. Model General Specification 3. Test methodDVB-S2 8PSK / QPSK 2 ~ 45Msymbol/s Symbolrate 4.0Msymbols/s to 7.2Msymbols/ssymbolrate DVB-S QPSK 2 ~ 45Msymbol/s5. Video resolutions 2D 5.1. Component Input Y, CB/PB, CR/PR5.2. RGB Input PC - LS35/LS34/CS46 series models are not supported 5.3. HDMI InputPC/DTV PCDVI1. Application Range ADJUSTMENT INSTRUCTIONBoot file Download 2. Designation3.2. EDID Download 3.1. ADC Process3.3. EDID data 7. ADC Calibration4. Total Assembly line process 4.1. Adjustment Preparation3.4 Function Check 4.4. IR emitter inspection 4.2. EYE-Q function check4.3. 3D function test Manual W/B process using adjust Remote control6. Model name & Serial number D/L 6.1. Signal Table5. HI-POT Test 5.1. HI-POT auto-check preparation7.2 LAN Inspection 7. MAC Address & CI+ key download7.1 MAC Address 7.3. LAN PORT INSPECTIONPING TESTLG2111 A RearSide IC101TDSN Applied Model **LM580T, **560T, **LS350T, **CS460TLS350T/CS460T G301D560S, **LS350S, **CS460S LS350S/CS460SG001D EXPLODED VIEW IMPORTANT SAFETY NOTICE+3.3VNormal FROM LIPS & POWER B/DPowerDET +1.5VDDR30Pin LVDS Connector LVDS for large inch51Pin LVDS Connector For FHD 60Hz FOR FHD REVERSE10bitIC1201 S7LR2DIVXMS10GP4LS7LR22011/06/03 DDR25612 H5TQ1G63DFR-H9C2011/06/03 Serial Flash for SPI bootGP4LS7LR2 SFLASH1MBCI Region Option name of this page CISLOT because of Hong Kong10067972-0500LF H/W option ETHERNET GP4LS7LR22011/06/14 ETHERNET21ETHERNET IR/LED and control for on.y ’12 sub without IR-OUT IR/CONTROLW/OIROUTTU2601 GP4RGLOBALTUNERBLOCKTU2602TU2603 TDSS-G101D TDSN-G301D TDSQ-G001DGP4LS7LR22011/11/02 DVBS27 DVB-S2 LNB Part AllegroOptionLNB DCDCGND and AGND are connectedAUDIO AMPSTA380BWE GP4LS7LR22011/11/16 AMPSTA380BWENAND FLASH MEMORY Normal Normal PowerVDDC DDR3USB SIDE USB1DIODESFor CEC HDMI2EANON SIDE HDMIHDMI1 HDMI2SCART AUDIO OUT Full ScartCOMPONENT SCART AUDIO MUTERS-232C 4PIN GP4LS7LR22011/09/26MSTART DEBUG4PIN 2011/09/05MSTAR DEBUG4PIN Page Contents of LCD TV Standard Repair Process Error symptom Contents of LCD TV Standard Repair Process Detail Technical ManualContinue to the next page ContentMain B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable A. Video errorLCD TV A2 Check Power Board 24v outputBoard 3.5V,12V,20V voltages of PowerCheck various or 24V…By using Digital signal level meter By using Diagnostics menu on OSD Menu→ Set up→ Support → Signal Test Signal strength Normal over 50%Signal Quality Normal over 50% → Set-Top-Box, Different maker TV etc ※ Check A8/ A9Check color by input -External Input COMPONENT -RGB Link CableConnect other external device and cable External device screen error-Color errorVertical/Horizontal bar, residual image, light spot Check color condition by input -External Input -Component RGBCheck Power On ‘”High” B. Power errorCheck Power LED Measure voltage of each output of Power B/DPOWEROFFABNORMAL1 Check Power Off ModeIf Power Off mode is not displayed Check Power B/D voltage POWEROFFCPUABNORMALCheck user menu Speaker off C. Audio error24V of Power Check audio B+In case of External Input signal error Check and fix external device Check audio B+ VoltageD. Function error 1. Remote controlR/C operating errorCheck & Repair Recognition error Check input signalY Check technical Signal information input? - Fix information Replace Main B/DE. Noise Identify nose typeF. Exterior defect