LG 26LC2RA Service Manual
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LG 26LC2RA Service Manual

LG 26LC2RA Service Manual

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LCD TV

SERVICE MANUAL

CHASSIS : LP61A
FACTORY MODEL : 26LC2RA-ZJ / 32LC2RA-ZJ
MODEL : 26LC2RA / 32LC2RA
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
e-mail:http://www.LGEservice.com/techsup.html
R
website:http://biz.LGservice.com

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  • Page 1: Service Manual

    LCD TV SERVICE MANUAL CHASSIS : LP61A FACTORY MODEL : 26LC2RA-ZJ / 32LC2RA-ZJ MODEL : 26LC2RA / 32LC2RA CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • Page 2: Table Of Contents

    CONTENTS CONTENTS ....................2 SAFETY PRECAUTIONS ................3 SPECIFICATION ..................6 ADJUSTMENT INSTRUCTION ..............9 TROUBLE SHOOTING ................19 BLOCK DIAGRAM...................22 EXPLODED VIEW .................. 24 REPLACEMENT PARTS LIST ............... 28 SVC. SHEET ....................- 2 -...

  • Page 3: Safety Precautions

    SAFETY PRECAUTIONS IMPORTANT SAFETY NOTICE Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the Schematic Diagram and Replacement Parts List. It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.

  • Page 4: Servicing Precautions

    SERVICING PRECAUTIONS CAUTION: Before servicing receivers covered by this service unit under test. manual and its supplements and addenda, read and follow the 2. After removing an electrical assembly equipped with ES SAFETY PRECAUTIONS on page 3 of this publication. devices, place the assembly on a conductive surface such as NOTE: If unforeseen circumstances create conflict between the aluminum foil, to prevent electrostatic charge buildup or...
  • Page 5 IC Remove/Replacement Some chassis circuit boards have slotted holes (oblong) through Circuit Board Foil Repair which the IC leads are inserted and then bent flat against the Excessive heat applied to the copper foil of any printed circuit circuit foil. When holes are the slotted type, the following technique board will weaken the adhesive that bonds the foil to the circuit should be used to remove and replace the IC.

  • Page 6: Specification

    SPECIFICATION NOTE : Specifications and others are subject to change without notice for improvement. 1. Application range 3. Test method This specification is applied to LP61A chassis. 3.1 Performance : LGE TV test method followed 2. Requirement for Test 3.2 Demanded other specification Safety : CE, IEC Specification Testing for standard of each part must be followed in below EMC : CE, IEC...
  • Page 7 6. Chroma & Brightness (Optical) Item Unit Maker Remark Luminance cd/m AUO 26", 32", 37" - 50cm from the surface LPL 26", 32" - Full White Pattern CMO 27", 32" View angle (R/L, U/D) 176/176 degree AUO 26" - CR >10 170/170 AUO 32"...
  • Page 8 7. Component Video Input (Y, PB, PR) Resolution H-freq(kHz) V-freq.(kHz) Pixel clock(MHz) Proposed 720x480 15.73 59.94 13.500 SDTV, DVD 480I(525I) 720x480 15.75 60.00 13.514 SDTV, DVD 480I(525I) 720x576 15.625 50.00 13.500 SDTV, DVD 576I(625I) 50Hz 720x480 31.47 59.94 27.000 SDTV 480P 720x480 31.50 60.00...

  • Page 9: Adjustment Instruction

    *Use for Windows 95/98 : Setup_LptDrv_v0104_9x.exe LN61A chassis(HURRICANE 3 MIDDLE) by manufacturing *Use for Windows 2000/XP : Setup_LptDrv_v0202_XP_2000.exe LG TV Plant all over the world. *Use for Windows NT : Setup_LptDrv_v0104_NT.exe 2. Specification (3) Verification (Start > Programs > Micronas > Visual 2.1 Because this is not a hot chassis, it is not necessary to...
  • Page 10 (3) Double click the blue box and confirm "Bootloader Version" as 40. (4) Click the "Erase Flash" button => Select "Bootloader.bat" file(install > VCTP_download > Bootloader) => Push "OK" (5) Double click the download file low, then "edit" window will be opened =>...
  • Page 11 (8) Click OK button at the "edit window" (2) Supply the power (Stand-by 5V) and wait for 3 seconds. (3) Push the S/W off (Disconnect SCL to GND using switch at jig) (9) Under Downloading process Push S/W (10) If download is failed, for example "No acknowledge from slave".
  • Page 12 (6)Click the "Erase Flash" button (10) Click OK button at the "edit window" (7) Double click the download file low then, "edit" window will be opened (11) Under Downloading progress (8) Chick the choice button I n the "edit window", then "file choice window’...
  • Page 13 (3) Execute ‘Download_CS.vi2c’ program in PC, then a (8) Chick the choice button I n the "edit window", then main widow will be opened. "file choice window’ will be opened Double click (4) Click "GO" button (9) Choose the Hex file in folder and execute downloading with click "open button"...
  • Page 14 4.1.2. Channel memory download 4.1.3. Tool Option Area Option Change (1) Connect the download jig to D-sub jack Before PCBA check, have to change the Tool option and (2) Execute ‘Channal.vi2c’ program in PC, then a main Area option window will be opened. Option values are below (If on changed the option, the input menu can differ the model spec.)
  • Page 15 < EDID DATA HDMI Set : 256bytes> 6. Adjustment of White Balance * In case of White Balance rework, you have to RESET the previous White Balance data. (You can do that by pushing the "IN-START" key in adjust remocon and reset) 6.1 Required Equipment - Remote controller for adjustment - l Color Analyzer (CA-110 or CA-210 or same product;...
  • Page 16 6.3 Adjustment of White Balance (For Manual adjustment) - Operate the zero-calibration of the CA-110, then stick sensor to LCD module when you adjust. - For manual adjustment, it is also possible by the following sequence 1) Select RF no signal by pressing POWER ON key on remote control for adjustment then operate heat run more than 15 minutes.
  • Page 17 7. Shipping Conditions Item Setting Remarks Station Auto Programme System Storage from Search To start Manual Programme Storage System Band V/UHF Channel Fine Search Name _ _ _ _ _ Programme Edit To set Favorite programme -- ----- Ch memory Picture Dynamic Normal...

  • Page 18: Svc Remocon

    SVC REMOCON FUNTION REAMARK To turn the TV on or off POWER To turn the TV on automatically if the power is supplied to the TV. (Use the POWER ON POWER key to deactivate): It should be deactivated when delivered. To activate the mute function.

  • Page 19: Troubleshooting

    TROUBLESHOOTING 1. No power (1) Symptom 1) Front LED is No light 2) The Set doesnt discharge little (2) Check process Is plug in power cord? Plug in a power cord Check P200 Voltage (P-ST_5V)? Check the PSU Check X-tal X600 (19.6608MHz) Check X-tal X600 Check IC600 Voltage (3.3V) Check IC600...
  • Page 20 2. No picture (1) Symptom 1) Some mode doesnt display. 2) Front LED is green 3) The set still discharge a little (2) Check follow 1) RF-mode doesnt display Are good some Are input voltage, I2C, Is the LVDS cable Is the Tuner cable Is VCT-P IC good? elements(C, R, L, or...
  • Page 21 3. No Sound (1) Symptom 1) Front LED is Green 2) The Set display a screen, but a sound doesnt output (2) Check follow 1) Speaker part Are Speaker Cables Are Speaker Cables Are Speaker units Good? connect normally? good? Insert the cable Exchange the Exchange the cable...

  • Page 22: Block Diagram

    BLOCK DIAGRAM - 22 -...
  • Page 23 BLOCK DIAGRAM DESCRIPTION 1. Video control and display data Video signal is received from TUNER, AV port(AV1,AV2,S-Video) and goes to the one-chip video decoder (VCTI) which separate the R,G,B signal and passes on the signal to AD converter(AD9883) through the video switch(SM5301).
  • Page 24 - 24 -...

  • Page 25: Exploded View

    PCB Assembly,Sub, SUB T.T LP61C 26LC2R CJ(AUO) SIDE AV FOR NT 6709900016C SMPS,AC/DC, LGLP2637HEP 90.0VTO264.0V 215W 47TO63HZ UL/CSA/SEMKO YY / AT / H&E or 6709900016A Power Supply Assembly, FREE H3/E2 LCD MODEL LCD LG ELECTRONICS LB LC 33139L2020A Main Total Assembly, 26LC2R(A/B)-ZJ BRAND LP61A AUO CKD 33139L2011C...
  • Page 26 - 26 -...
  • Page 27 PCB Assembly,Sub, SUB T.T LP61A 32LC2R Z SIDE AV 6709900016C SMPS,AC/DC, LGLP2637HEP 90.0VTO264.0V 215W 47TO63HZ UL/CSA/SEMKO YY / AT / H&E or 6709900016A Power Supply Assembly, FREE H3/E2 LCD MODEL LCD LG ELECTRONICS LB LC 33139L3039A Main Total Assembly, 32LC2R(A/B)-ZJ BRAND LP61A AUO CKD 33139L3043A...

  • Page 28: Replacement Parts List

    REPLACEMENT PARTS LIST For Capacitor & Resistors, the CC, CX, CK, CN, CH : Ceramic RD : Carbon Film charactors at 2nd and 3rd digit in the CQ : Polyestor RS : Metal Oxide Film P/No. means as follows; CE : Electrolytic RN : Metal Film CF : Fixed Film RH : CHIP, Metal Glazed(Chip)
  • Page 29 DATE: 2006. 03. 15. DATE: 2006. 03. 15. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C729 0CK104CK56A 0.1UF 1608 50V 10% R/TP X7R C976 0CK103CK56A 0.01UF 1608 50V 10% R/TP X7 C735 0CK104CK56A 0.1UF 1608 50V 10% R/TP X7R...
  • Page 30 DATE: 2006. 03. 15. DATE: 2006. 03. 15. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C854 0CK224CF56A 0.22UF 1608 16V 10% R/TP X7 C134 0CE106WH6DC 10UF MVK 25V 20% R/TP(SMD) C855 0CK224CF56A 0.22UF 1608 16V 10% R/TP X7...
  • Page 31 DATE: 2006. 03. 15. DATE: 2006. 03. 15. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C951 0CE477WF6DC 470UF MVK 16V 20% SMD R/TP( IC902 0IPMG00027A SC156515M-1.8TR SEMTECH 5P/ C953 0CE477WF6DC 470UF MVK 16V 20% SMD R/TP( IC903 0IMCRRH001A...
  • Page 32 DATE: 2006. 03. 15. DATE: 2006. 03. 15. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION L913 6200J000013 MLB-321611-0500P-N2 MAG LAY Q111 0TR387500AA CHIP 2SC3875S(ALY) BK KEC - L914 6200J000013 MLB-321611-0500P-N2 MAG LAY Q112 0TR387500AA...
  • Page 33 DATE: 2006. 03. 15. DATE: 2006. 03. 15. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R137 0RJ4703D677 470K OHM 1/10 W 5% 1608 R/T R316 0RJ0752D677 75 OHM 1/10 W 5% 1608 R/TP R138 0RJ1001D677 1K OHM 1/10 W 5% 1608 R/TP...
  • Page 34 DATE: 2006. 03. 15. DATE: 2006. 03. 15. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R533 0RJ2201D677 2200 OHM 1/10 W 5% 1608 R/T R866 0RJ0000D677 0 OHM 1/10 W 5% 1608 R/TP R539 0RJ2702D677 27K OHM 1/10 W 5% 1608 R/TP...
  • Page 35 DATE: 2006. 03. 15. DATE: 2006. 03. 15. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R401 0RJ0000D677 0 OHM 1/10 W 5% 1608 R/TP R668 0RJ1000D677 100 OHM 1/10 W 5% 1608 R/TP R406 0RJ1000D677 100 OHM 1/10 W 5% 1608 R/TP...
  • Page 36 SX-1SMD SUNNY RADIAL 202500-32LC2R SW501 6600VR1004A SKHMPW 5P CHIP TACT J-ALPS 6700MF0017C TAFV-W303P LGIT MULTI FS PH CONTROL BOARD SW101 140-313B TACT 2LEAD 160G(TA) LG C&D SW102 140-313B TACT 2LEAD 160G(TA) LG C&D SW103 140-313B TACT 2LEAD 160G(TA) LG C&D SW104 140-313B TACT 2LEAD 160G(TA) LG C&D...
  • Page 40 Apr., 2006 P/NO : MFL30105510 Printed in Korea...

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