C. Audio error, Lcd Tv, Board | LG Electronics 26CS460/460S/460T-ZA

Standard Repair Process

	Error	C. Audio error	Established	2012. 01 .14
LCD TV	Error	C. Audio error	date	2012. 01 .14
LCD TV	symptom	No audio/ Normal video	Revised date		9/14
		No audio/ Normal video	Revised date		9/14

No audio Screen normal

☞A15

Check user menu > Speaker off

Off

Cancel OFF

☞A16

Check audio B+	Normal	Y
24V of Power	Normal
24V of Power	voltage
Board	voltage
Board

Replace Power Board and repair parts

Check		N
Check		Disconnection
Speaker		Disconnection
Speaker
disconnection
		Y
		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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LG Electronics 26CS460/460S/460T-ZA C. Audio error, Lcd Tv, Check user menu Speaker off, Check audio B+, Normal, voltage

Contents

CHASSIS LD21C SERVICE MANUALREAD THE SAFETY PRECAUTIONS IN THIS MANUAL http//aic.lgservice.com CONTENTS SAFETY PRECAUTIONSSERVICING PRECAUTIONS SPECIFICATION SAFETY PRECAUTIONS IMPORTANT SAFETY NOTICE SERVICING PRECAUTIONS Electrostatically Sensitive ES Devices IC Remove/Replacement ReplacementSmall-Signal Discrete Transistor Removal/Replacement Removal SPECIFICATION 4. Model General Specification1. Application range 3. Test method Symbolrate 4.0Msymbols/s to 7.2Msymbols/s symbolrateDVB-S2 8PSK / QPSK 2 ~ 45Msymbol/s DVB-S QPSK 2 ~ 45Msymbol/s 5. 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 PCDVI ADJUSTMENT INSTRUCTION Boot file Download1. Application Range 2. Designation 3.1. ADC Process 3.3. EDID data3.2. EDID Download 7. ADC Calibration 4. 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 inspection 6.1. Signal Table 5. HI-POT Test6. Model name & Serial number D/L 5.1. HI-POT auto-check preparation 7. MAC Address & CI+ key download 7.1 MAC Address7.2 LAN Inspection 7.3. LAN PORT INSPECTIONPING TEST Rear SideLG2111 A IC101 Applied Model **LM580T, **560T, **LS350T, **CS460T LS350T/CS460TTDSN G301D 560S, **LS350S, **CS460S LS350S/CS460SG001D EXPLODED VIEW FROM LIPS & POWER B/D PowerDET+3.3VNormal +1.5VDDR LVDS for large inch 51Pin LVDS Connector For FHD 60Hz30Pin LVDS Connector FOR FHD REVERSE10bit S7LR2DIVXMS10 GP4LS7LR22011/06/03 DDR25612IC1201 H5TQ1G63DFR-H9C Serial Flash for SPI boot GP4LS7LR22011/06/03 SFLASH1MB CI 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/OIROUT GP4RGLOBALTUNERBLOCK TU2602TU2603 TDSS-G101D TDSN-G301DTU2601 TDSQ-G001D DVB-S2 LNB Part Allegro OptionLNBGP4LS7LR22011/11/02 DVBS27 DCDCGND and AGND are connected AUDIO AMPSTA380BWE GP4LS7LR22011/11/16 AMPSTA380BWE NAND FLASH MEMORY Normal Power VDDCNormal DDR3 USB SIDE USB1DIODES HDMI2EANON SIDE HDMI HDMI1For CEC HDMI2 Full Scart COMPONENTSCART AUDIO OUT SCART AUDIO MUTE RS-232C 4PIN GP4LS7LR22011/09/26 MSTART 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 Content A. Video error LCD TVMain B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable A2 Check Power Board 24v output voltages 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 Cable External 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 RGB B. Power error Check Power LEDCheck Power On ‘”High” Measure voltage of each output of Power B/D Check Power Off Mode If Power Off mode is not displayed Check Power B/D voltagePOWEROFFABNORMAL1 POWEROFFCPUABNORMAL C. 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+ Voltage D. Function error 1. Remote controlR/C operating errorCheck & Repair Check input signal Y Check technical Signal information input? - Fix informationRecognition error Replace Main B/D E. Noise Identify nose type F. Exterior defect

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

Models: 26CS460/460S/460T-ZA 26CS460T CS26460T-ZA

C. Audio error

Check user menu > Speaker off

Check audio B+

Normal

24V of Power

voltage

Board