LG du-37lz30 Service Manual
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LG du-37lz30 Service Manual

LG du-37lz30 Service Manual

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LCD TV

SERVICE MANUAL

CHASSIS : AL-03HA
MODEL : DU-37LZ30
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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Summary of Contents for LG du-37lz30

  • Page 1: Service Manual

    LCD TV SERVICE MANUAL CHASSIS : AL-03HA MODEL : DU-37LZ30 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 ..............9 SVC REMOTE CONTROLLER..............12 TROUBLE SHOOTING ................13 BLOCK DIAGRAM...................16 WIRING DIAGRAM ..................18 EXPLODED VIEW .................. 19 EXPLODED VIEW PARTS LIST ..............20 REPLACEMENT PARTS LIST ............... 21 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 X-RADIATION, Shock, Fire, or other Hazards.

  • Page 4: Servicing Precautions

    SERVICING PRECAUTIONS CAUTION: Before servicing receivers covered by this service should be used to help reduce the incidence of component manual and its supplements and addenda, read and follow the damage caused by static by static electricity. SAFETY PRECAUTIONS on page 3 of this publication. 1.
  • Page 5 c. Quickly move the soldering iron tip to the junction of the Fuse and Conventional Resistor component lead and the printed circuit foil, and hold it there Removal/Replacement only until the solder flows onto and around both the 1. Clip each fuse or resistor lead at top of the circuit board hollow component lead and the foil.

  • Page 6: Specification

    NOTE : Specifications and others are subject to change without notice for improvement. 1. Application range 3. Test and Inspection method This specification is applied to AL-03HA chassis. (1) Capacity: Follow LG electronics TV Testing Standard. (2) Another Required Standard 2. Requirement for Test EMI: Following CE Standard(EN55020,EN55013)
  • Page 7 6.Component Video Input(Y, C Resoluton H-freq(kHz) V-freq(kHz) Pixel clock Proposed 640 x 480 15.73 60.00 SDTV. DVD 480I 704 x 480 31.47 59.94 SDTV 480P 1280 x 720 45.00 60.00 HDTV 720P 1280 x 720 44.96 59.94 HDTV 720P 1920 x 1080 33.75 60.00 HDTV 1080I...
  • Page 8 8.DVI Input(PC/DTV) Resoluton H-freq(kHz) V-freq(kHz) Pixel clock Proposed 640 x 350 31.468 70.09 25.17 720 x 400 31.469 70.08 28.32 720 x 400 37.927 85.03 35.50 640 x 480 31.469 59.94 25.17 VESA(VGA) 640 x 480 37.861 72.80 31.50 VESA(VGA) 640 x 480 37.500 75.00...

  • Page 9: Adjustment Instruction

    ADJUSTMENT INSTRUCTION 1. Scope of Application (3) EDID data for RGB of AL-03HA These specifications are applied to all LCD TV models employing an AL-03HA EDID table = chassis. 01 02 03 07 08 09 0A 0B 0C 0D 0E 0F 2.
  • Page 10 4.3 Adjust Color Temperature (White Balance) VPX3226 1. Contrast(MAIN) ◀ 31▶ (1) Devices Used 2. Contrast(Sub) ◀ 31▶ Color analyzer (CA-100 or equivalent) Automatic adjustment device (Necessary for automatic adjustment. Should be compatible with RS-232C communication.) AV pattern generator US 6CH US 6CH (2) Instrument Interconnection (For automatic adjustment) 3) At first adjust ‘1.
  • Page 11 EDID ADJUSTMENT Windows EDID V1.0 User Manual 2. EDID Read & Write 1) Run WinEDID.exe Operating System: MS Windows 98, 2000, XP Port Setup: Windows 98 => Don’t need setup Windows 2000, XP => Need to Port Setup. This program is available to LCD Monitor only. 1.

  • Page 12: Svc Remote Controller

    SVC REMOTE CONTROLLER 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 13: Troubleshooting

    TROUBLESHOOTING No Power Check the Fail condition of the power- Connect the connectors related connectors. Pass Measure standby Measure digital Fail reference voltage: voltage: 24V at Power Board 6V at D_board P810 CN304 pin no. 15 pin no. 1 Pass Replace D_power_board Measure analog Measure standby...
  • Page 14 No Raster Measure standby voltage: Check no. power. Replace D_board 6V at D_board P810 pin (Go to No power) Fail Pass no. 1 Pass Measure standby Check no. power. voltage: Replace A_board 6V at A_board P818 pin Fail (Go to No power) Pass no.
  • Page 15 No Sound Check Measure sound supply: A_power board trans output: Replace 18V at A_board P821 4V at D_power_board P815 pin D_power_board Fail Fail pin no. 3 no. 4 Pass Pass Check if A_board 18V is short-circuited: Replace A_board Resistance between A_board Fail P821 pin no.

  • Page 16: Block Diagram

    BLOCK DIAGRAM - 16 -...
  • Page 17 BLOCK DIAGRAM DESCRIPTION ATSC/NTSC tuner (TDVB-001P) can receive both terrestrial analog and terrestrial digital signals. But a NTSC tuner (6700NFNS06C) can receive terrestrial analog only. Therefore if you run two displays at the same time, it is not possible to see two digital channels. A/V SW (CXA2069) is the IC that takes external input terminal signals and broadcast signals from the tuners and handles them selectively.

  • Page 18: Wiring Diagram

    - 18 -...

  • Page 19: Exploded View

    - 19 -...

  • Page 20: Exploded View Parts List

    3091TKE007D CABINET ASSEMBLY, DU-37LZ30 BRAND. CABINET ASSY 3091TKE007F CABINET ASSEMBLY, DU-37LZ30(C/SKD) BRAND. BEST ASSY 6304FLP150A LCD(LIQUID CRYSTAL DISPLAY), LC370W01-C5K1 LG PHILPS TFT COLOR WXGA, WITH AI 3809TKE005D BACK COVER ASSEMBLY, DU-37LZ30 . SET 3809TKE005G BACK COVER ASSEMBLY, DU-37LZ30(C/SKD). BEST ASSY 3043TKK162C TILT SWIVEL ASSEMBLY, DU-37LZ30 .STAND ASSY...

  • Page 21: 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 22 DATE: 2004. 7. 7. DATE: 2004. 7. 7. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C767 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP C773 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP C768 0CH3103K516 10000PF 50V 10% B(Y5P) 2012...
  • Page 23 DATE: 2004. 7. 7. DATE: 2004. 7. 7. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C692 0CE476VK6DC 47UF MV 50V 20% R/TP(SMD) SM ZD115 0DZ510009EE UDZ S 5.1B TP ROHM-K SOD323 C727 0CE107WF6DC 100UF MVK 16V 20% R/TP(SMD) ZD128...
  • Page 24 DATE: 2004. 7. 7. DATE: 2004. 7. 7. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION L805 6210TCE001G HH-1M3216-501 CERATEC 3216MM Q824 0TR150400BA CHIP 2SA1504S(ASY) BK KEC - L809 6210TCE001G HH-1M3216-501 CERATEC 3216MM Q827 0TR387500AA...
  • Page 25 DATE: 2004. 7. 7. DATE: 2004. 7. 7. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R1835 0RH1801D622 1.8K 1/10W 5 D.R/TP R1809 0RH0752D622 75 1/10W 5 D.R/TP R1836 0RH3301D622 3.3K 1/10W 5 D.R/TP R1810 0RH5100D622...
  • Page 26 DATE: 2004. 7. 7. DATE: 2004. 7. 7. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R836 0RH1502D622 15K 1/10W 5 D.R/TP R142 0RH0000D622 0 OHM 1 / 10 W 2012 5.00% D R837 0RH6801D622 6.8K 1/10W 5 D.R/TP...
  • Page 27 DATE: 2004. 7. 7. DATE: 2004. 7. 7. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R1892 0RH0000D622 0 OHM 1 / 10 W 2012 5.00% D JDAU1 6613V00023A PPJ151-01 PARK-ELEC PIN JACK R1904 0RH1501D622 1.5K OHM 1 / 10 W 2012 5.00%...
  • Page 28 DATE: 2004. 7. 7. DATE: 2004. 7. 7. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C120 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP C267 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP C122 0CH3103K516 10000PF 50V 10% B(Y5P) 2012...
  • Page 29 DATE: 2004. 7. 7. DATE: 2004. 7. 7. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C414 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP C877 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP C415 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP...
  • Page 30 DATE: 2004. 7. 7. DATE: 2004. 7. 7. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C322 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP C838 0CH2334F566 0.33UF 16V 10% X7R 2012 R/TP C333 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP...
  • Page 31 MLB-321611-0120A-N1 MAG LAYE IC200 0ICTMLG009A LGDT1102 HD2 LG IC SBGA-432 B304 0LCML00002A MLB-321611-0120A-N1 MAG LAYE IC315 0ICTMLG013A LGDT1901A LG IC 24P SSOP TRA B305 0LCML00002A MLB-321611-0120A-N1 MAG LAYE IC607 0ICTMLG014A LGDT3302 LG IC 100P TQFP TRA B306 0LCML00002A MLB-321611-0120A-N1 MAG LAYE...
  • Page 32 DATE: 2004. 7. 7. DATE: 2004. 7. 7. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION B402 0LCML00002B MLB-321611-0050P-N1 6A MAG L Q811 0TR387500AA CHIP 2SC3875S(ALY) BK KEC - B411 0LCML00002B MLB-321611-0050P-N1 6A MAG L RESISTORs...
  • Page 33 DATE: 2004. 7. 7. DATE: 2004. 7. 7. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R1329 0RH5600D622 560 1/10W 5 D.R/TP R333 0RH4702D622 47K 1/10W 5 D.R/TP R1334 0RH0272D622 27 1/10W 5 D.R/TP R334 0RH4702D622...
  • Page 34 DATE: 2004. 7. 7. DATE: 2004. 7. 7. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R875 0RH3300D622 330 1/10W 5 D.R/TP R361 0RH0222D622 22 OHM 1 / 10 W 2012 5.00% D R877 0RH3300D622 330 1/10W 5 D.R/TP...
  • Page 35 DATE: 2004. 7. 7. DATE: 2004. 7. 7. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R1330 0RH0222D622 22 OHM 1 / 10 W 2012 5.00% D R319 0RH0331D622 3.3 OHM 1 / 10 W 2012 5.00% R1331 0RH0222D622 22 OHM 1 / 10 W 2012 5.00% D...
  • Page 36 10K OHM 1 / 10 W 2012 5.00% R820 0RH0000D622 0 OHM 1 / 10 W 2012 5.00% D SW1501 140-313B TACT 2LEAD 160G(TA) LG C&D N R822 0RH0000D622 0 OHM 1 / 10 W 2012 5.00% D SW1502 140-313B TACT 2LEAD 160G(TA) LG C&D N...
  • Page 37 DATE: 2004. 7. 7. DATE: 2004. 7. 7. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LED BOARD R1261 0RH4701D622 4.7K 1/10W 5 D.R/TP C1209 0CH6101K416 100PF 50V J NP0 2012 R/TP R1262 0RH1500D622 150 1/10W 5 D.R/TP...
  • Page 38 DATE: 2004. 7. 7. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION PA1000 6726VV0006J TSOP2238MQ1 VISHAY 38KHZ MC0 R2101 0RH0472D622 47 1/10W 5 D.R/TP R2102 0RH0752D622 75 1/10W 5 D.R/TP R2103 0RH0752D622 75 1/10W 5 D.R/TP R2104 0RH0752D622 75 1/10W 5 D.R/TP R2105 0RH0752D622 75 1/10W 5 D.R/TP...
  • Page 39 2004.03.19...
  • Page 45 Jul., 2004 P/NO : 3828TSL104C Printed in Korea...

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