LG DU-42LZ30 Service Manual
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LG DU-42LZ30 Service Manual

LG DU-42LZ30 Service Manual

42" lcd tv - integrated hdtv and pc monitor
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LCD TV

SERVICE MANUAL

CHASSIS : AL-03HA
MODEL : DU-42LZ30
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-42LZ30

  • Page 1: Service Manual

    LCD TV SERVICE MANUAL CHASSIS : AL-03HA MODEL : DU-42LZ30 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

    42 inch wide Aspect Ratio 16:9 Tuning System LCD Module LC420W02-C5-K1(1280 x 768) LG Philips LCD Operting environment 1)Temp : 0 ~ 40 deg 2)Humidity : ~ 80% Storage Environment 1)Temp : -20 ~ 60 deg 2)Humidity : ~ 85%...
  • Page 7 4.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 6.DVI Input(PC/DTV) Resoluton H-freq(kHz) V-freq(kHz) Pixel clock Proposed 640 x 350 31.468 70.09 25.17 640 x 350 37.861 85.08 31.50 720 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...

  • 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) (1) Devices Used 2. Contrast(Sub) 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 REMOE CONTROLLER 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 13: Troubleshooting

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

    CABINET ASSEMBLY, DU-42LZ30 BRAND 3090V00554 SET 3091TKE015G CABINET ASSEMBLY, DU-42LZ30 BRAND 3090V00554 SKD 6304FLP148A LCD(LIQUID CRYSTAL DISPLAY), LC420W02-B4K1 LG PHILPS TFT COLOR WXGA, 0.7T, NORMAL POL, 500NITS, H-H, WITH AI 3809TKE015A BACK COVER ASSEMBLY, DU-42LZ30 3809TKE009 SET 3809TKE015D BACK COVER ASSEMBLY, DU-42LZ30 3809TKE009 SKD...

  • 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. 13. DATE: 2004. 7. 13. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C765 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP C749 0CH3103K516 10000PF 50V 10% B(Y5P) 2012 R/ C767 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP C773...
  • Page 23 DATE: 2004. 7. 13. DATE: 2004. 7. 13. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C614 0CH8226F691 22UF 16V 20% 105STD (CYL) R/TP ZD113 0DZ510009EE UDZ S 5.1B TP ROHM-K SOD323 20 C651 0CE107VF6DC 100UF MV 16V 20% R/TP(SMD) SMD ZD115...
  • Page 24 DATE: 2004. 7. 13. DATE: 2004. 7. 13. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION L803 6210TCE001G HH-1M3216-501 CERATEC 3216MM R Q823 0TR387500AA CHIP 2SC3875S(ALY) BK KEC - - L805 6210TCE001G HH-1M3216-501 CERATEC 3216MM R Q824...
  • Page 25 DATE: 2004. 7. 13. DATE: 2004. 7. 13. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R1833 0RH0682D622 68 1/10W 5 D.R/TP R1802 0RH1000D622 100 1/10W 5 D.R/TP R1835 0RH1801D622 1.8K 1/10W 5 D.R/TP R1809 0RH0752D622 75 1/10W 5 D.R/TP R1836...
  • Page 26 DATE: 2004. 7. 13. DATE: 2004. 7. 13. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R831 0RH6801D622 6.8K 1/10W 5 D.R/TP R141 0RH0000D622 0 OHM 1 / 10 W 2012 5.00% D R836 0RH1502D622 15K 1/10W 5 D.R/TP R142...
  • Page 27 DATE: 2004. 7. 13. DATE: 2004. 7. 13. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R1891 0RH0000D622 0 OHM 1 / 10 W 2012 5.00% D T804 6200J00011A H354LAI-K5202 TOKO R/TP BAND P R1892 0RH0000D622 0 OHM 1 / 10 W 2012 5.00% D JAV1...
  • Page 28 DATE: 2004. 7. 13. DATE: 2004. 7. 13. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C119 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP C266 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP C120 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP C267...
  • Page 29 DATE: 2004. 7. 13. DATE: 2004. 7. 13. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C413 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP C876 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP C414 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP C877...
  • Page 30 DATE: 2004. 7. 13. DATE: 2004. 7. 13. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C319 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP C358 0CH2102K516 1000PF 50V 10% B(Y5P) 2012 R/T C322 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP C838...
  • Page 31 0LCML00002B MLB-321611-0050P-N1 6A MAG LAY IC200 0ICTMLG009A LGDT1102 HD2 LG IC SBGA-432PI B303 0LCML00002A MLB-321611-0120A-N1 MAG LAYERS IC315 0ICTMLG013A LGDT1901A LG IC 24P SSOP TRAY B304 0LCML00002A MLB-321611-0120A-N1 MAG LAYERS IC607 0ICTMLG014A LGDT3302 LG IC 100P TQFP TRAY B305 0LCML00002A MLB-321611-0120A-N1 MAG LAYERS...
  • Page 32 DATE: 2004. 7. 13. DATE: 2004. 7. 13. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION B312 0LCML00002A MLB-321611-0120A-N1 MAG LAYERS Q801 0TR387500AA CHIP 2SC3875S(ALY) BK KEC - - B313 0LCML00002A MLB-321611-0120A-N1 MAG LAYERS Q802 0TR150400BA CHIP 2SA1504S(ASY) BK KEC - -...
  • Page 33 DATE: 2004. 7. 13. DATE: 2004. 7. 13. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R105 0RH4701D622 4.7K 1/10W 5 D.R/TP R329 0RH1602D622 16K 1/10W 5 TA R1120 0RH4701D622 4.7K 1/10W 5 D.R/TP R331 0RH3300D622 330 1/10W 5 D.R/TP R120...
  • Page 34 DATE: 2004. 7. 13. DATE: 2004. 7. 13. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R867 0RH1000D622 100 1/10W 5 D.R/TP R273 0RH0000D622 0 OHM 1 / 10 W 2012 5.00% D R872 0RH1000D622 100 1/10W 5 D.R/TP R275...
  • Page 35 DATE: 2004. 7. 13. DATE: 2004. 7. 13. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R1324 0RH0222D622 22 OHM 1 / 10 W 2012 5.00% D R314 0RH0222D622 22 OHM 1 / 10 W 2012 5.00% D R1325 0RH0222D622 22 OHM 1 / 10 W 2012 5.00% D R317...
  • Page 36 6700NFNS04D TDVB-H751P LG INOTEK ATSC/NTSC R812 0RH1002D622 10K OHM 1 / 10 W 2012 5.00% D TU102 6700VNF019E TAFH-H001P LG NTSC FS . R813 0RH1002D622 10K OHM 1 / 10 W 2012 5.00% D R815 0RH1001D622 1K OHM 1 / 10 W 2012 5.00% D...
  • Page 37 PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION SW1505 140-313B TACT 2LEAD 160G(TA) LG C&D NON R1247 0RH1000D622 100 1/10W 5 D.R/TP SW1506 140-313B TACT 2LEAD 160G(TA) LG C&D NON R1248 0RH1000D622 100 1/10W 5 D.R/TP SW1507 140-313B TACT 2LEAD 160G(TA) LG C&D NON...
  • Page 38 DATE: 2004. 7. 13. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION ZD2102 0DZ510009EE UDZ S 5.1B TP ROHM-K SOD323 20 ZD2103 0DZ510009EE UDZ S 5.1B TP ROHM-K SOD323 20 L2101 0LC0233002A 3.3UH CERATECH R/TP L2102 0LC0233002A 3.3UH CERATECH R/TP L2103 0LC0233002A 3.3UH CERATECH R/TP...
  • Page 39 2004.03.19...
  • Page 45 Jul., 2004 P/NO : 3828TSL104F Printed in Korea...

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