LG Electronics 26CS460T, 26CS460/460S/460T-ZA, CS26460T-ZA E. Noise, Lcd Tv, Identify nose type

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E. Noise

Standard Repair Process

 

 

Error

E. Noise

Established

2012. 01 .14

 

 

 

LCD TV

date

 

 

 

symptom

Circuit noise, mechanical noise

Revised date

 

13/14

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Identify nose type

Circuit noise

Mechanical noise

Check location of noise

Check location of noise

Replace PSU (with LED driver)

OR

Replace LED driver

Mechanical noise is a natural phenomenon, and apply the 1st level description. When the customer does not agree, apply the process by stage.

Describe the basis of the description in “Part related to nose” in the Owner’s Manual.

OR

When the nose is severe, replace the module (For models with fix information, upgrade the S/W or provide the description)

If there is a “Tak Tak” noise from the cabinet, refer to the KMS fix information and then proceed as shown in the solution manual (For models without any fix information, provide the description)

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/s5.1. Component Input Y, CB/PB, CR/PR 5. Video resolutions 2D5.2. 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 Calibration4.1. Adjustment Preparation 4. Total Assembly line process3.4 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 G301DLS350S/CS460S 560S, **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 SFLASH1MBOption name of this page CISLOT because of Hong Kong CI Region10067972-0500LF GP4LS7LR22011/06/14 ETHERNET21 H/W option ETHERNETETHERNET 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 GP4LS7LR22011/09/262011/09/05 MSTART DEBUG4PINMSTAR 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…Menu→ Set up→ Support → Signal Test Signal strength Normal over 50% By using Digital signal level meter By using Diagnostics menu on OSDSignal 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+ Voltage1. Remote controlR/C operating error D. Function errorCheck & Repair Check input signal Y Check technical Signal information input? - Fix informationRecognition error Replace Main B/DE. Noise Identify nose typeF. Exterior defect