LG 32LB1R Service Manual
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LG 32LB1R Service Manual

LG 32LB1R Service Manual

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LCD TV
SERVICE MANUAL
CHASSIS : ML-051B
FACTORY NAME : 32LB1R-ZE/37LB1R-ZE
MODEL : 32LB1R/37LB1R
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html

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  • Page 1 LCD TV SERVICE MANUAL CHASSIS : ML-051B FACTORY NAME : 32LB1R-ZE/37LB1R-ZE MODEL : 32LB1R/37LB1R CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • Page 2: Table Of Contents

    CONTENTS CONTENTS ....................2 PRODUCT SAFETY ..................3 SPECIFICATION ..................6 ADJUSTMENT INSTRUCTION..............11 TROUBLE SHOOTING ................16 BLOCK DIAGRAM...................19 WIRING DIAGRAM ..................20 EXPLODED VIEW .................. 21 REPLACEMENT PARTS LIST ............... 25 SVC. SHEET ....................- 2 -...

  • Page 3: Product Safety

    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 Shock, Fire, or other Hazards.
  • Page 4 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

    VHF High : 4~S22 UHF : S23~62 Input Voltage AC 100 ~ 240 V/50Hz, 60Hz Market Worldwide Picture Size 800.4mm 31.51inch(32LB1R) 940.3mm 37.02 inch(37LB1R) Tuning System FVS 100 program PAL, 200 PR.(Option) NTSC Operating Environment 1) Temp : 0 ~ 40 deg...
  • Page 7 2. General Specification Item Specification Remark Panel 32", 37" TFT WXGA LCD Frequency range H : 31 ~ 61Khz PC Input V : 56 ~ 75Hz Control Function 1) Contrast/Brightness 2) H-Position / V-Position 3) Tracking : Clock / Phase 4) Auto Configure 5) Reset Component Jack...
  • Page 8 3.Optical Feature(LCD Module) Item Specification Remark R/L, U/D 176, 176 Viewing Angle<CR 10> Luminance(cd/ ) Luminance Variation Typical MAX/MIN Contrast Ratio (With Al) 1200 ALL white/All back WHITE Typ. 0.285 CIE Color Coordinates Typ. 0.293 Typ. Typ. 0.640 Typ. -0.03 0.341 Typ.
  • Page 9 6. HDMI INPUT Mode Table Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed Analog RGB, Digital RGB 720x400 31.468 70.8 28.321 640x480 31.469 59.94 25.17 VESA 37.684 75.00 31.5 VESA 800x600 37.879 60.31 40.00 VESA 46.875 49.5 VESA 832x624 49.725 74.55 57.283 1024x768 48.363 60.00...
  • Page 10 Ground (Red) Ground (Blanking) Red input Ground (Video input & Output) Video output (Composite) 1V including sync Video input (Composite) 1V including sync Common ground (Shield) 8. Mechanical specification <32LB1R> Item Content Remark Product Dimenson Width(W) Length(D) Height(H) Before Packing 911.4...

  • Page 11: Adjustment Instruction

    00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F This spec. sheet is applied to all of the ML-051B LB chassis (TORNADO) manufactured at LG TV Plant. 00 00 FF FF FF FF FF FF 00 1E 6D...
  • Page 12 3) Press the ADJ key on R/C for adjustment. 4. ADC Calibration 4) Press the (Vol. +) key to operate the set , then it becomes automatically. 4.1 Adjustment of RF/AV/S-VIDEO * Required Equipment - Remote controller for adjustment - MSPG-925F Pattern Generator (Which has Video Signal: 75% Color Bar Pattern shown in Fig.
  • Page 13 5.2 Auto White Balance(AV) 5. White Balance Data Default Value Command1 Command2 Set ID 5.1 Manual white Balance (AV) 1) Execute CA-110 Zero Calibration. Input Select XB 2) Execute the SET Heat Run for 30minutes R-Gain 3) Push the ADJ Button then you can see the OSD G-Gain B-Gain R-Offset...
  • Page 14 6. Shipping Conditions Item Condition Remark Power Volume Level Main Picture Input Main Last Channel Pr 01 Mute 16 : 9 Station Auto Program Manual Program Program Edit Favorite Program None Picture Dynamic Dynamic Contrast Brightness Colour Sharpness Normal ZE(TE) Fleshtone : 1 Greentone : 1 Bluetone : 1...
  • Page 15 SVC REMOCON 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. MUTE To check TV screen image easily.

  • Page 16: Troubleshooting

    TROUBLESHOOTING NO POWER (POWER INDICATOR OFF) CHECK CN804 CHECK POWER BOARD VOLTAGE (P-ST_5V) CHECK CRYCTAL CHECK CRYSTAL X800 X800(19.6608MHZ) CHECK IC806 VOLTAGE (5V) CHECK IC806 CHECK Power on/off CHECK Q1001 (5V) REPLACE POWER BOARD - 16 -...
  • Page 17 NO VIDEO CHECK THE PERIPHERAL CHECK LVDS Output IC800 P3(PIN 21, PIN 22) CHECK THE PERIPHERAL Check L2 (12V) CHECK L1022 CHECK R898 (24V) (3.3V) REPLACE LCD MODULE DOWN LOAD ISP DATA or REPLACE MAIN BOARD - 17 -...
  • Page 18 NO SOUND IS THE SPK CABLE INSERT CABLES WELL CONNECTED WELL? DOES IC302 OPERATE? CHECK IC302 OR CHANGE DOES IC301 OPERATE? CHECK IC301 OR CHANGE CHECK X300 OR CHANGE DOES IC300 OPERATE? CHECK X400 OR CHANGE DOES IC400 OPERATE? REPLACE JACK BOARD - 18 -...

  • Page 19: Block Diagram

    BLOCK DIAGRAM - 19 -...

  • Page 20: Wiring Diagram

    - 20 -...

  • Page 21: Exploded View

    - 21 -...
  • Page 22 PART NO. 30919K0010D CABINET ASSEMBLY, 32LB1 BRAND 30909K0013 32LB1R-ZE, FOR SKD 6304FLP359A LCD(LIQUID CRYSTAL DISPLAY), LC320W01-SL11 LG PHILIPS TFT COLOR 4MASK SYNC INVERTER 3809900133D BACK COVER ASSEMBLY, 32LB1R-ZE NON FOR SKD 3043900014D TILT SWIVEL ASSEMBLY, 32LB1 . STAND FOR SKD 3043900014C TILT SWIVEL ASSEMBLY, 32LB1 .
  • Page 23 - 23 -...
  • Page 24 CABINET ASSEMBLY, 37LB1 BRAND . RZ-C/SKD 6304FLP360A LCD(LIQUID CRYSTAL DISPLAY), LC370WX1-SL11 LG PHILIPS TFT COLOR 4MASK SYNK INVERTER or 6304FLP289A LCD(LIQUID CRYSTAL DISPLAY), LC370WX1-SL01 LG PHILPS TFT COLOR WXGA AIODC SPEC UP LEAD FREE 3809900157E BACK COVER ASSEMBLY, 37LB1 NON RZ-C/SKD 3043900025B TILT SWIVEL ASSEMBLY, 37LB1 .

  • Page 25: 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 26 DATE: 2005. 12. 01. DATE: 2005. 12. 01. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C1213 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP C1300 0CK105DF64A 1UF 2012 16V 20% F(Y5V) R/T C1215 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP...
  • Page 27 DATE: 2005. 12. 01. DATE: 2005. 12. 01. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C386 0CK474DH56A 0.47UF 2012 25V 10% R/TP X7 C925 0CH3103K516 10000PF 50V 10% B(Y5P) 2012 C387 0CK474DH56A 0.47UF 2012 25V 10% R/TP X7...
  • Page 28 DATE: 2005. 12. 01. DATE: 2005. 12. 01. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C396 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP C333 0CH6102K406 1000PF 50V 5% SL 2012 R/TP C401 0CH3103K516 10000PF 50V 10% B(Y5P) 2012...
  • Page 29 DATE: 2005. 12. 01. DATE: 2005. 12. 01. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C1070 0CE476WF6DC 47UF MVK 16V 20% R/TP(SMD) C1312 0CE476WF6DC 47UF MVK 16V 20% R/TP(SMD) C1073 0CE477WF6DC 470UF MVK 16V 20% SMD R/TP( C1313...
  • Page 30 DATE: 2005. 12. 01. DATE: 2005. 12. 01. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION COIL & CORE & INDUCTOR D1009 0DS226009AA KDS226 TP KEC - 80V - - 4NS D101 0DS226009AA KDS226 TP KEC - 80V - - 4NS...
  • Page 31 DATE: 2005. 12. 01. DATE: 2005. 12. 01. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION L299 6210TCE001A HB-1S2012-080JT CERATEC 201 Q305 0TR102008AA KRA102S R/TP KEC SOT23 CHIP L300 6210TCE001G HH-1M3216-501 CERATEC 3216M Q306 0TR387500AA...
  • Page 32 DATE: 2005. 12. 01. DATE: 2005. 12. 01. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R128 0RH1500D622 150 OHM 1 / 10 W 2012 5.00% R326 0RH1002D622 10K OHM 1 / 10 W 2012 5.00% R129 0RH2001D622 2K OHM 1 / 10 W 2012 5.00%...
  • Page 33 DATE: 2005. 12. 01. DATE: 2005. 12. 01. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R726 0RH1002D622 10K OHM 1 / 10 W 2012 5.00% R2325 0RH2200D622 220 OHM 1 / 10 W 2012 5.00% R727 0RH1002D622 10K OHM 1 / 10 W 2012 5.00%...
  • Page 34 DATE: 2005. 12. 01. DATE: 2005. 12. 01. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R445 0RH1000D622 100 OHM 1 / 10 W 2012 5.00% R748 0RH0000D622 0 OHM 1 / 10 W 2012 5.00% D R446 0RH1000D622 100 OHM 1 / 10 W 2012 5.00%...
  • Page 35 100 OHM 1 / 10 W 2012 5.00% CONTROL BOARD R3109 0RH0000D622 0 OHM 1 / 10 W 2012 5.00% D SW1201 140-313B TACT 2LEAD 160G(TA) LG C&D R3111 0RH0000D622 0 OHM 1 / 10 W 2012 5.00% D SW1202 140-313B TACT 2LEAD 160G(TA) LG C&D SW1203 140-313B TACT 2LEAD 160G(TA) LG C&D...
  • Page 37 Dec., 2005 P/NO : 38289S0043C Printed in Korea...

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