LG Electronics 26CS460/460S/460T-ZA Continue to the next page, Error symptom, Content, Page

Page 39

Contents of LCD TV Standard Repair Process Detail Technical Manual

No.

Error symptom

Content

Page

Remarks

 

 

 

 

 

1

 

Check LCD back light with naked eye

A1

 

 

 

 

 

 

2

A. Video error_ No video/Normal

LED driver B+ 24V measuring method

A2

 

 

 

 

 

3

audio

Check White Balance value

A3

 

 

 

 

 

 

 

 

4

 

Power Board voltage measuring method

A4

 

 

 

 

 

 

6

A. Video error_ No video/Video

TUNER input signal strength checking method

A5

 

 

 

 

 

7

lag/stop

LCD-TV Version checking method

A6

 

 

 

 

 

 

 

 

9

 

LCD TV connection diagram

A7

 

 

 

 

 

 

10

A. Video error_Color error

Check Link Cable (LVDS) reconnection

A8

 

condition

A9

 

 

 

 

 

 

 

 

 

11

 

Adjustment Test pattern - ADJ Key

A10

 

 

 

 

 

 

12

 

LCD TV connection diagram

A8

 

 

 

 

 

 

13

A. Video error_Vertical/Horizontal bar,

Check Link Cable (LVDS) reconnection

A8

 

residual image, light spot

condition

A9

 

 

 

 

 

 

 

 

14

 

Adjustment Test pattern - ADJ Key

A10

 

 

 

 

 

 

15

 

Exchange T-Con Board (1)

A-1/5

 

 

 

 

 

 

16

 

Exchange T-Con Board (2)

A-2/5

 

 

<Appendix>

 

 

 

17

Exchange LED driver Board (PSU)

A-3/5

55” : driver board

Defected Type caused by T-Con/

Other : PSU

 

Inverter/ Module

 

 

 

 

 

 

18

 

Exchange Module itself (1)

A-4/5

 

 

 

 

 

 

19

 

Exchange Module itself (2)

A-5/5

 

 

 

 

 

 

Continue to the next page

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Contents http//aic.lgservice.com CHASSIS LD21CSERVICE MANUAL READ THE SAFETY PRECAUTIONS IN THIS MANUALSPECIFICATION CONTENTSSAFETY PRECAUTIONS SERVICING PRECAUTIONSIMPORTANT SAFETY NOTICE SAFETY PRECAUTIONSElectrostatically Sensitive ES Devices SERVICING PRECAUTIONSRemoval IC Remove/ReplacementReplacement Small-Signal Discrete Transistor Removal/Replacement3. Test method SPECIFICATION4. Model General Specification 1. Application rangeDVB-S QPSK 2 ~ 45Msymbol/s Symbolrate 4.0Msymbols/s to 7.2Msymbols/ssymbolrate DVB-S2 8PSK / 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 PCDVI 5.3. HDMI InputPC/DTV2. Designation ADJUSTMENT INSTRUCTIONBoot file Download 1. Application Range7. ADC Calibration 3.1. ADC Process3.3. EDID data 3.2. EDID Download4. Total Assembly line process 4.1. Adjustment Preparation3.4 Function Check 4.4. IR emitter inspection 4.5. Outgoing condition Configuration4.2. EYE-Q function check 4.3. 3D function test5.1. HI-POT auto-check preparation 6.1. Signal Table5. HI-POT Test 6. Model name & Serial number D/L7.3. LAN PORT INSPECTIONPING TEST 7. MAC Address & CI+ key download7.1 MAC Address 7.2 LAN InspectionIC101 RearSide LG2111 AG301D Applied Model **LM580T, **560T, **LS350T, **CS460TLS350T/CS460T TDSN560S, **LS350S, **CS460S LS350S/CS460SG001D EXPLODED VIEW +1.5VDDR FROM LIPS & POWER B/DPowerDET +3.3VNormalFOR FHD REVERSE10bit LVDS for large inch51Pin LVDS Connector For FHD 60Hz 30Pin LVDS ConnectorH5TQ1G63DFR-H9C S7LR2DIVXMS10GP4LS7LR22011/06/03 DDR25612 IC1201SFLASH1MB Serial Flash for SPI bootGP4LS7LR2 2011/06/03CI Region Option name of this page CISLOT because of Hong Kong10067972-0500LF H/W option ETHERNET GP4LS7LR22011/06/14 ETHERNET21ETHERNET IR/CONTROLW/OIROUT IR/LED and control for on.y ’12 sub without IR-OUTTDSQ-G001D GP4RGLOBALTUNERBLOCKTU2602TU2603 TDSS-G101D TDSN-G301D TU2601DCDCGND and AGND are connected DVB-S2 LNB Part AllegroOptionLNB GP4LS7LR22011/11/02 DVBS27GP4LS7LR22011/11/16 AMPSTA380BWE AUDIO AMPSTA380BWENAND FLASH MEMORY DDR3 Normal PowerVDDC NormalUSB1DIODES USB SIDEHDMI2 HDMI2EANON SIDE HDMIHDMI1 For CECSCART AUDIO MUTE Full ScartCOMPONENT SCART AUDIO OUTGP4LS7LR22011/09/26 RS-232C 4PINMSTART DEBUG4PIN 2011/09/05MSTAR DEBUG4PIN Page Contents of LCD TV Standard Repair Process Content Contents of LCD TV Standard Repair Process Detail Technical ManualContinue to the next page Error symptomA2 Check Power Board 24v output A. Video errorLCD TV Main B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D Cableor 24V… voltages of PowerCheck various Board 3.5V,12V,20VBy 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 Link Cable A8/ A9Check color by input -External Input COMPONENT -RGB ※ CheckCheck color condition by input -External Input -Component RGB External device screen error-Color errorVertical/Horizontal bar, residual image, light spot Connect other external device and cableMeasure voltage of each output of Power B/D B. Power errorCheck Power LED Check Power On ‘”High”POWEROFFCPUABNORMAL Check Power Off ModeIf Power Off mode is not displayed Check Power B/D voltage POWEROFFABNORMAL1Check audio B+ C. Audio error24V of Power Check user menu Speaker offCheck audio B+ Voltage In case of External Input signal error Check and fix external deviceD. Function error 1. Remote controlR/C operating errorCheck & Repair Replace Main B/D Check input signalY Check technical Signal information input? - Fix information Recognition errorIdentify nose type E. NoiseF. Exterior defect
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