LG 26LC2R Service Manual
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LG 26LC2R Service Manual

Service manual
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LCD TV

SERVICE MANUAL

CHASSIS : LP61C
FACTORY MODEL : 26LC2R-TJ / 32LC2R-TJ
MODEL : 26LC2R / 32LC2R
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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Summary of Contents for LG 26LC2R

  • Page 1: Service Manual

    LCD TV SERVICE MANUAL CHASSIS : LP61C FACTORY MODEL : 26LC2R-TJ / 32LC2R-TJ MODEL : 26LC2R / 32LC2R 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 ...............12 TROUBLE SHOOTING ................21 BLOCK DIAGRAM...................28 WIRING ....................30 EXPLODED VIEW .................. 31 REPLACEMENT PARTS LIST ............... 35 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 LP61C 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 4.2 Model Specification 4.2.1 NON-EU / CHINA (TJ/CJ) Item Specification Remark Market NON EU / CHINA 26/32LC2R-TJ 26/32/37LC2R-CJ Broadcasting system PAL BG/DK, PAL I/II, NTSC-M Available Channel BAND NTSC VHF/UHF C1~C69 2~83 CATV S1~S47 1~71 Receiving system Upper Heterodyne Video Input (2EA) PAL, SECAM, NTSC 4 System : PAL, SECAM, NTSC, PAL60...
  • Page 8 Item Unit Maker Remark White Typ. 0.285 Typ. CMO 27" -0.03 +0.03 (32") 0.293 0.646 (0.652) 0.332 Green 0.269 (0.270) 0.600 (0.589) Blue 0.142 (0.141) 0.072 (0.068) White Typ. 0.275 Typ. LPL 26" -0.03 (0.285) +0.03 (32") 0.279 (0.293) 0.630 (0.640) 0.338 (0.343)
  • Page 9 6. Component Video Input (Y, PB, PR) Resolution H-freq(kHz) V-freq.(kHz) Pixel clock(MHz) Proposed Remarks 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...
  • Page 10 10. SET factoring condition 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 11 11. Mechanical Specification 11.1 26LC2R Item Content Remark Product Width Length Height Unit Dimension Before Packing SET(With Stand) After Packing Product Only SET 16.8 Weight With BOX 18.9 11.2 32LC2R Item Content Remark Product Width Length Height Unit Dimension Before Packing...

  • Page 12: 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 13 (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 14 (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 15 (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 16 (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 17 4.1.2. S/W program download 4.1.3. Colorcarrier Adjustment (inspection process) (1) Connect the download jig to D-sub jack a. Tuning the RF signal (2) Execute ‘Channal.vi2c’ program in PC, then a main widow ZJ, TJ, CJ : PAL Philips Pattern (with Color Bar) will be opened.
  • Page 18 6) Adjust Only High Light with R Gain / B Gain using Model Name Model Name(HEX) (VOL + / -) key on R/C. 26LC2R-TJ 7) Adjust it until color coordination becomes as below. (Initially, R/G/B gain and R/G/B offset values are fixed as 32LC2R-TJ...
  • Page 19 7. Shipping Conditions Item Condition Remark Power Volume Level Main Picture Input Main Last Channel Pr 01 Mute 16 : 9 Station Auto Programme Manual Programme Programme Edit Favorite Programme None Picture Dynamic Dynamic Contrast Brightness Colour Sharpness Normal Auto Advanced Reset Sound...

  • Page 20: 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 21: Trouble Shooting

    TROUBLESHOOTING 1. No power (1) Symptom 1) Front LED is No light 2) The Set doesn’t discharge little (2) Check process Is plug in power cord? Plug in a power cord Is connect the line filter cable to PSU? Connect a cable Is normal the Fuse(F901) on PSU Exchange the Fuse Is connect the PSU and Main board with 13P cable ?
  • Page 22 2. Cannot Power on (1) Symptom 1) Front LED is Red, but doesn’t change Green ( Cannot turn on the SET ) 2) Don’t operate power on using a Remocon or Local key. (2) Check process Pull off the power cord and wait until discharge entirely (you can watch the LED on a main board through a Back cover.
  • Page 23 3. Protect mode (1) Symptom 1) After once shining, it does not discharge minutely from module 2) The Rely falls down (The sound is audible “click”) 3) The front LED turn Green to Red (2) Check process Is normal PSU? Does the Low/High voltage operate normally? Exchange the PSU Is normal cables?
  • Page 24 4. No raster (1) Symptom 1) Front LED is Green 2) The Set doesn’t discharge little (2) Check process Is normal PSU? Does the Low/High voltage operate normally? Exchange the PSU Is normal cables? Do cable connect well each wafer? Exchange the cable Disconnecting cable(P301, P900, P1001) Exchange main board...

  • Page 25: No Sound

    5. No Sound (1) Symptom 1) Front LED is Green 2) The Set display a screen, but a sound doesn’t output (2) Check process 1) Speaker part Are Speaker Cables Are Speaker Cables Good? Are Speaker units good? connect normally? Exchange the cable Insert the cable exactly 2) Main board part...
  • Page 26 6. Display the screen abnormally (1) Symptom 1) Display the screen abnormally at specific mode (2) Check process 1) Noise appears at RF mode. Is the Tuner cable Are input voltage, I2C, Is the Tuner part good? connected well? and CVBS output good? Insert the cable exactly Exchange the Tuner Is Gaskets added well?
  • Page 27 7. No picture (1) Symptom 1) Some mode doesn’t display. 2) Front LED is green 3) The set still discharge a little (2) Check process 1) RF-mode doesn’t display Are input voltage, Are good some Is the LVDS cable Is the Tuner cable C, and CVBS Is VCT-P IC good? elements (C, R, L,...

  • Page 28: Block Diagram

    BLOCK DIAGRAM HDMI SPK_L/R H/P_L/R MNT_L/R TV_L/R MNT_V/L/R TV_LV/R - 28 -...
  • Page 29 - 29 -...

  • Page 30: Wiring

    WIRING - 30 -...
  • Page 31 - 31 -...

  • Page 32: Exploded View

    PCB Assembly,Sub, SUB T.T LP61C 26LC2R CJ(AUO) GUMI MFG EBR30397401 PCB Assembly,Sub, SUB PAKING LP61C 26LC2R TJ SIDE AV SKD 6709900016A Power Supply Assembly, FREE H3/E2 LCD MODEL LCD LG ELECTRONICS LB LC 33139L2017A Main Total Assembly, 26LC2R(AUO) BRAND LC61A -DMS 33139L2017C...
  • Page 33 - 33 -...
  • Page 34 PCB Assembly,Sub, SUB T.T LP61A 32LC2R . SIDE AV for DMS 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 33139L3028A Main Total Assembly, 32LC2R(AUO) BRAND LC61A - Non EU 33139L3028E...

  • Page 35: 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 36 DATE: 2006. 03. 25. DATE: 2006. 03. 25. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C1012 0CK104CK56A 0603B104K500CT 100nF 10% 50 C506 0CK103CK56A 0603B103K500CT 10nF 10% 50V C1013 0CK104CK56A 0603B104K500CT 100nF 10% 50 C507 0CK103CK56A...
  • Page 37 DATE: 2006. 03. 25. DATE: 2006. 03. 25. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C859 0CK105CF94A 0603F105Z160CT 1uF -20TO+80 C618 0CK104CK56A 0603B104K500CT 100nF 10% 50 C862 0CK105CF94A 0603F105Z160CT 1uF -20TO+80 C619 0CK104CK56A 0603B104K500CT 100nF 10% 50...
  • Page 38 DATE: 2006. 03. 25. DATE: 2006. 03. 25. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION D905 0DD200009AF RU2M 400V 1.2V 10UA 20A 400 L1002 6210TCE001G HH-1M3216-501JT 500OHM 3.2X D906 0DD200009AF RU2M 400V 1.2V 10UA 20A 400 L1007...
  • Page 39 DATE: 2006. 03. 25. DATE: 2006. 03. 25. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION L924 6210TCE001G HH-1M3216-501JT 500OHM 3.2X R175 0RJ2203D677 MCR03EZPJ224 220KOHM 5% 1/1 L118 0LCML00020G MLI-201209-3R3K 3.3UH 10% - R176 0RJ0752D677 MCR03EZPJ750 75OHM 5% 1/10W...
  • Page 40 DATE: 2006. 03. 25. DATE: 2006. 03. 25. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R330 0RJ1001D677 MCR03EZPJ102 1KOHM 5% 1/10W R769 0RJ1001D677 MCR03EZPJ102 1KOHM 5% 1/10W R331 0RJ0000D677 MCR03EZPJ000 0OHM 5% 1/10W R771 0RJ2200D677...
  • Page 41 DATE: 2006. 03. 25. DATE: 2006. 03. 25. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R935 0RH0000D622 MCR10EZHJ000 0OHM 5% 1/8W 2 R519 0RJ2700D677 MCR03EZPJ271 270OHM 5% 1/10 R937 0RJ0000D677 MCR03EZPJ000 0OHM 5% 1/10W R520...
  • Page 42 DESCRIPTION / SPECIFICATION OTHERs R697 0RJ2001D677 MCR03EZPJ202 2KOHM 5% 1/10W R699 0RJ1000D677 MCR03EZPJ101 100OHM 5% 1/10 X600 6202VDT002P HC-49/SM 20.25000MHZ 20.25M-26LC2R R700 0RJ1000D677 MCR03EZPJ101 100OHM 5% 1/10 X600 6202VDT002E SX-1 20.25MHZ 20.25MHZ 30PP-32LC2R R702 0RJ1000D677 MCR03EZPJ101 100OHM 5% 1/10 D1004 0DL233309AC SAM2333 RED/Y-GREEN 2.7V 2.
  • Page 45 Jun., 2006 P/NO : MFL30105597 Printed in Korea...

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