Manuals / LG Electronics / TV and Video / Flat Panel Television

LG Electronics 32LS3500-ZA, 32LS359T-ZC, 32LS3590 C. Audio error, Lcd Tv, Check audio B+ Voltage

Models: 32LS350T 32LS359T-ZC 32LS350S-ZA 32LS350S 32LS3590-ZC 32LS359T 32LS350T-ZA 32LS3500-ZA 32LS3590 32LS359S-ZC

1 53

Download 53 pages 7.26 Kb

Page 49

Check audio

Standard Repair Process

		Error	C. Audio error	Established	2012. 01 .14
	LCD TV	Error	C. Audio error	date	2012. 01 .14
	LCD TV	symptom	Wrecked audio/ discontinuation/noise	Revised date		10/14
			Wrecked audio/ discontinuation/noise	Revised date		10/14

→abnormal audio/discontinuation/noise is same after “Check input signal” compared to No audio

☞A16

Check input signal -RF

-External Input signal

Signal normal?

N

Y

(When RF signal is not received)

	Wrecked audio/	Check and replace
	Discontinuation/
		speaker and
	Noise for
		connector
	all audio

Wrecked audio/ Discontinuation/

Noise only Replace Main B/D for D-TV

Wrecked audio/ Discontinuation/ Noise only

for Analog

Check audio

B+ Voltage (24V)

Y

Normal

voltage?

N

Replace Power B/D

Request repair to external cable/ANT provider

(In case of External Input signal error) Check and fix external device

Wrecked audio/ Discontinuation/ Noise only

for External Input

Connect and check other external device

Normal audio?

Y

Replace Main B/D

N

End

Check and fix external device

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

Image 49

LG Electronics 32LS3500-ZA, 32LS359T-ZC, 32LS3590, 32LS350S, 32LS350T, 32LS359S C. Audio error, Lcd Tv, Check audio B+ Voltage

Contents

SERVICE MANUAL CHASSIS LD21CREAD THE SAFETY PRECAUTIONS IN THIS MANUAL http//aic.lgservice.comSAFETY PRECAUTIONS CONTENTSSERVICING PRECAUTIONS SPECIFICATIONIMPORTANT SAFETY NOTICE SAFETY PRECAUTIONSElectrostatically Sensitive ES Devices SERVICING PRECAUTIONSReplacement IC Remove/ReplacementSmall-Signal Discrete Transistor Removal/Replacement Removal4. Model General Specification SPECIFICATION1. Application range 3. Test methodSymbolrate 4.0Msymbols/s to 7.2Msymbols/s Specificationsymbolrate 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/DTVBoot file Download ADJUSTMENT INSTRUCTION1. Application Range 2. Designation3.3. EDID data 3.1. ADC Process3.2. EDID Download 7. ADC Calibration4.1. Adjustment Preparation 4. Total Assembly line process3.4 Function Check 4.3. 3D function test 4.2. EYE-Q function check4.4. IR emitter inspection Manual W/B process using adjust Remote control5. HI-POT Test 6.1. Signal Table6. Model name & Serial number D/L 5.1. HI-POT auto-check preparation7.1 MAC Address 7. MAC Address & CI+ key download7.2 LAN Inspection 7.3. LAN PORT INSPECTIONPING TESTSide RearLG2111 A IC101Rear Applied Model **LM580T, **560T, **LS350T, **CS460TSide LG2111 ARear 560S, **LS350S, **CS460SSide LG2111 AIMPORTANT SAFETY NOTICE EXPLODED VIEWPowerDET FROM LIPS & POWER B/D+3.3VNormal +1.5VDDR51Pin LVDS Connector For FHD 60Hz LVDS for large inch30Pin LVDS Connector Only for training and service purposesS7LR2DIVXMS10 Only for training and service purposesGP4LS7LR22011/06/03 DDR25612 Copyright 2012 LG Electronics. Inc. All rights reservedOnly for training and service purposes Serial Flash for SPI bootGP4LS7LR2 2011/06/03Option name of this page CISLOT because of Hong Kong CI RegionOnly for training and service purposes Copyright 2012 LG Electronics. Inc. All rights reservedGP4LS7LR22011/06/14 ETHERNET21 H/W option ETHERNETOnly for training and service purposes ETHERNETOnly for training and service purposes IR/LED and control for on.y ’12 sub without IR-OUTCopyright 2012 LG Electronics. Inc. All rights reserved LGE Internal Use OnlyOnly for training and service purposes GP4RGLOBALTUNERBLOCKTU2602TU2603 TDSS-G101D TDSN-G301D TU2601OptionLNB DVB-S2 LNB Part AllegroGP4LS7LR22011/11/02 DVBS27 Only for training and service purposesOnly for training and service purposes AUDIO AMPSTA380BWEGP4LS7LR22011/11/16 AMPSTA380BWE Copyright 2012 LG Electronics. Inc. All rights reservedCopyright 2012 LG Electronics. Inc. All rights reserved Only for training and service purposesLGE Internal Use Only NAND FLASH MEMORYOnly for training and service purposes Normal PowerVDDC NormalUSB1DIODES USB SIDEOnly for training and service purposes Copyright 2012 LG Electronics. Inc. All rights reservedOnly for training and service purposes HDMI2EANON SIDE HDMIHDMI1 For CECOnly for training and service purposes Full ScartCOMPONENT SCART AUDIO OUTOnly for training and service purposes RS-232C 4PINCopyright 2012 LG Electronics. Inc. All rights reserved LGE Internal Use OnlyOnly for training and service purposes MSTART DEBUG4PINGP4LS7LR2 2011/09/05Page Contents of LCD TV Standard Repair Process Continue to the next page Contents of LCD TV Standard Repair Process Detail Technical ManualError symptom ContentLCD TV A. Video errorMain B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable A2 Check Power Board 24v outputvoltages of Power A. Video errorOnly for training and service purposes LCD TVBy using Digital signal level meter By using Diagnostics menu on OSD A. Video errorMenu→ Set up→ Support → Signal Test Signal strength Normal over 50% Signal Quality Normal over 50%LCD TV A. Video error→ Set-Top-Box, Different maker TV etc A. Video error A8/ A9LCD TV Check color by input -External Input COMPONENT -RGBA. Video error External device screen error-Color errorVertical/Horizontal bar, residual image, light spot LCD TVCheck Power LED B. Power errorCheck Power On ‘”High” Measure voltage of each output of Power B/DCheck Power Off Mode B. Power errorIf Power Off mode is not displayed Check Power B/D voltage POWEROFFABNORMAL124V of Power C. Audio errorLCD TV Check user menu Speaker offIn case of External Input signal error Check and fix external device C. Audio errorLCD TV Check audio B+ Voltage1. Remote controlR/C operating error D. Function errorLCD TV Check & RepairCheck input signal D. Function errorY Check technical Signal information input? - Fix information Recognition errorLCD TV E. NoiseIdentify nose type LCD TV F. Exterior defect