LG Electronics 26CS460/460S/460T-ZA C. Audio error, Lcd Tv, Check user menu Speaker off, Normal

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C. Audio error

Standard Repair Process

 

 

Error

C. Audio error

Established

2012. 01 .14

 

 

LCD TV

date

 

 

symptom

No audio/ Normal video

Revised date

 

9/14

 

 

 

 

 

 

 

 

 

 

 

No audio Screen normal

☞A15

Check user menu > Speaker off

N

Off

Check user menu > Speaker off Y

Cancel OFF

☞A16

Check audio B+

Normal

Y

24V of Power

 

voltage

 

Board

 

 

 

 

 

 

Check audio B+ N

Replace Power Board and repair parts

Check

 

N

 

Disconnection

Speaker

 

 

 

 

disconnection

 

 

 

 

 

Y

 

 

 

 

 

 

 

 

Replace Speaker

 

 

 

 

 

Replace MAIN Board

End

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

LGE Internal Use Only

Only for training and service purposes

 

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Contents CHASSIS LD21C SERVICE MANUALREAD THE SAFETY PRECAUTIONS IN THIS MANUAL http//aic.lgservice.comCONTENTS SAFETY PRECAUTIONSSERVICING PRECAUTIONS SPECIFICATIONSAFETY PRECAUTIONS IMPORTANT SAFETY NOTICESERVICING PRECAUTIONS Electrostatically Sensitive ES DevicesIC Remove/Replacement ReplacementSmall-Signal Discrete Transistor Removal/Replacement RemovalSPECIFICATION 4. Model General Specification1. Application range 3. Test methodSymbolrate 4.0Msymbols/s to 7.2Msymbols/s symbolrateDVB-S2 8PSK / QPSK 2 ~ 45Msymbol/s 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 PCDVIADJUSTMENT INSTRUCTION Boot file Download1. Application Range 2. Designation3.1. ADC Process 3.3. EDID data3.2. EDID Download 7. ADC Calibration4. Total Assembly line process 4.1. Adjustment Preparation3.4 Function Check 4.5. Outgoing condition Configuration 4.2. EYE-Q function check4.3. 3D function test 4.4. IR emitter inspection6.1. Signal Table 5. HI-POT Test6. Model name & Serial number D/L 5.1. HI-POT auto-check preparation7. MAC Address & CI+ key download 7.1 MAC Address7.2 LAN Inspection 7.3. LAN PORT INSPECTIONPING TESTRear SideLG2111 A IC101Applied Model **LM580T, **560T, **LS350T, **CS460T LS350T/CS460TTDSN G301D560S, **LS350S, **CS460S LS350S/CS460SG001D EXPLODED VIEW FROM LIPS & POWER B/D PowerDET+3.3VNormal +1.5VDDRLVDS for large inch 51Pin LVDS Connector For FHD 60Hz30Pin LVDS Connector FOR FHD REVERSE10bitS7LR2DIVXMS10 GP4LS7LR22011/06/03 DDR25612IC1201 H5TQ1G63DFR-H9CSerial Flash for SPI boot GP4LS7LR22011/06/03 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/OIROUTGP4RGLOBALTUNERBLOCK TU2602TU2603 TDSS-G101D TDSN-G301DTU2601 TDSQ-G001DDVB-S2 LNB Part Allegro OptionLNBGP4LS7LR22011/11/02 DVBS27 DCDCGND and AGND are connectedAUDIO AMPSTA380BWE GP4LS7LR22011/11/16 AMPSTA380BWENAND FLASH MEMORY Normal Power VDDCNormal DDR3USB SIDE USB1DIODESHDMI2EANON SIDE HDMI HDMI1For CEC HDMI2Full Scart COMPONENTSCART AUDIO OUT SCART AUDIO MUTERS-232C 4PIN GP4LS7LR22011/09/26MSTART DEBUG4PIN 2011/09/05MSTAR DEBUG4PIN Page Contents of LCD TV Standard Repair Process Contents of LCD TV Standard Repair Process Detail Technical Manual Continue to the next pageError symptom ContentA. Video error LCD TVMain B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable A2 Check Power Board 24v outputvoltages of Power Check variousBoard 3.5V,12V,20V 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 A8/ A9 Check color by input -External Input COMPONENT -RGB※ Check Link CableExternal device screen error-Color error Vertical/Horizontal bar, residual image, light spotConnect other external device and cable Check color condition by input -External Input -Component RGBB. Power error Check Power LEDCheck Power On ‘”High” Measure voltage of each output of Power B/DCheck Power Off Mode If Power Off mode is not displayed Check Power B/D voltagePOWEROFFABNORMAL1 POWEROFFCPUABNORMALC. Audio error 24V of PowerCheck user menu Speaker off 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 Check input signal Y Check technical Signal information input? - Fix informationRecognition error Replace Main B/DE. Noise Identify nose typeF. Exterior defect
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