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LG Electronics L1933TR manual

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Table of contents for the manual

  • Page 1

    COLOR MONIT OR SER VICE MANUAL Website:http://biz.LGservice.com CAUTION BEFORE SERVICING THE UNIT , READ THE SAFETY PRECAUTIONS IN THIS MANUAL. CHASSIS NO. : LM57B MODEL: L1733TR (L1733TR-SFQ.A**MQP) L1933TR (L1933TR-SFQ.A**MQP ,A**RQP) *To apply the MSTAR Chip . ( ) **Same model for Service Internal Use Only[...]

  • Page 2

    CONTENTS - 2 - Copyright 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only SPECIFICA TIONS ................................................... 2 PRECAUTIONS ....................................................... 3 TIMING CHART ....................................................... 7 DISASSE[...]

  • Page 3

    PRECAUTION - 3 - Copyright 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only WARNING FOR THE SAFETY-RELATED COMPONENT. • There are some special components used in LCD monitor that are important for safety. These parts are marked on the schematic diagram and the replacement parts list. It is[...]

  • Page 4

    SER VICING PRECAUTIONS - 4 - Copyright 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only CAUTION: Before servicing receivers covered by this service manual and its supplements and addenda, read and follow the SAFETY PRECAUTIONS on page 3 of this publication. NOTE: If unforeseen circumstances [...]

  • Page 5

    - 5 - Copyright 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only General Soldering Guidelines 1 . Use a grounded-tip, low-wattage soldering iron and appropriate tip size and shape that will maintain tip temperature within the range or 500 F to 600 F. 2. Use an appropriate gauge of RMA resin-[...]

  • Page 6

    - 6 - Copyright 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only Circuit Board Foil Repair Excessive heat applied to the copper foil of any printed circuit board will weaken the adhesive that bonds the foil to the circuit board causing the foil to separate from or "lift-off" the bo[...]

  • Page 7

    TIMING CHART - 7 - Copyright 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only VIDEO SYNC B C E A D 1 H(Pixels) + 25.175 31.469 800 640 16 96 48 640 x 350 V(Lines) - 70.09 449 350 37 2 60 2 H(Pixels) - 28.321 31.468 900 720 18 108 54 720 X 400 V(Lines) + 70.08 449 400 12 2 35 3 H(Pixels) - 25[...]

  • Page 8

    - 8 - Copyright 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only Monitor on the pad. Pull up the stand part. Separate head & stand # 2 # 3 # 4-2 Hold the head & stand base and then Twist Stand until "Click". # 4-1 # 5 Soft pad on the table. # 1 DISASSEMBL Y -Set[...]

  • Page 9

    - 9 - Copyright 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only Remove the screws. Disassemble back cover. # 6 # 8 1. Pull the front cover upward. 2. Then, let the all latches are separated.(#3-1~3-2) 3. Put the front face down. # 9 # 7[...]

  • Page 10

    - 10 - Copyright 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only DISASSEMBL Y -Stand Push the four latches on the bottom to the outside and Separate Stand Body & Base. (Reference the #1-2) After finished repair, necessarily push 4ea Latches to inside for restoration. # 1-1 * In case of [...]

  • Page 11

    - 11 - Copyright 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only DISASSEMBL Y -Stand Hold the stand body. Confirm two latch of right and left. Push the latch to the inside. Push the base to the opposite direction. # 1 # 2 # 3 Confirm the condition of separation. # 5 # 4 * In case of Latch 2[...]

  • Page 12

    BLOCK DIAGRAM - 12 - Copyright 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only TSUMx6AL ADC TMDS Rx MStarA CE L VDS Tx L VDS Analog (R/G/B) Digital D-Sub D VI-D LIPS Filter 5V 12V 5V 3.3V 1.8V Vcc 5V 5V Scaler MCU Intel8032 Inv er ter (4 lamps) 12V Regulator KEY 3.3V 1.8V Line Buff er OSD S[...]

  • Page 13

    BLOCK DIAGRAM-POWER - 13 - Copyright 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only LAMP High Low PO WER INVERTER In verter Control IC P-ch N-ch In verter T rans SMPS Lamp Current Feedback Over V oltage Protection Pow e r Control IC Feedback Line Filter LN Drive Block 12V 13V 5V In verter [...]

  • Page 14

    DESCRIPTION OF BLOCK DIAGRAM - 14 - Copyright 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 1. Video Controller Part. This part amplifies the level of video signal for the digital conversion and converts from the analog video signal to the digital video signal using a pixel clock. The pix[...]

  • Page 15

    LIPS Board Block Diagram - 15 - Copyright 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only EMI COMPONENT S LINE 100 ~ 240V INPUT RECTIFIER AND FIL TER SWITCHING TRANSFORMER OUTPUT RECTIFIER AND FIL TER 12V 5V GND SIGNAL COLLENT - ION PHOTO-COUPLER ISOLA TION PWM CONTRO L CIRCUIT HVD C 10 0KH[...]

  • Page 16

    ADJUSTMENT - 16 - Copyright 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only Windows EDID V1.0 User Manual 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 17

    - 17 - Copyright 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 2 2 0 IBM Compatible PC PARALLEL PORT Power inlet (required) Power LED ST Switch Power Select Switch (110V/220V) Control Line Not used RS232C PARALLEL V-SYNC PO W ER ST VGS MONITOR E E V-Sync On/Off Switch (Switch must be ON.)[...]

  • Page 18

    TROUBLESHOOTING GUIDE - 18 - Copyright 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 1. NO POWER NO POWER (POWER INDICATOR OFF) NO Check Power Board, And Find Out a Short Point as Opening Each Power Line No Problem 1 Waveforms U201-#96 Check Key Control Connector Routine Check U201 NO NO [...]

  • Page 19

    - 19 - Copyright 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 2. NO RASTER (OSD IS NOT DISPLA YED) – LIPS NO RASTER (OSD IS NOT DISPLAYED) NO NO NO NO REPLACE CCFL LAMP IN THE LCD MODULE CHECK POWER BOARD, AND FIND OUT A SHORT POINT AS OPENING EACH POWER LINE CHECK MICOM INV ON/OFF POR[...]

  • Page 20

    - 20 - Copyright 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 3. NO RASTER (OSD IS NOT DISPLA YED) – MST AR NO RASTER (OSD IS NOT DISPLAYED) NO NO NO TROUBLE IN CABLE OR LCD MODULE CHECK U301 1. CHECK C210, C211 SOLDERING CONDITION 2. CHECK X201 3. TROUBLE IN U201 CHECK CONNECTION LINE[...]

  • Page 21

    - 21 - Copyright 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 4. TROUBLE IN DPM TROUBLE IN DPM NO NO TROUBLE IN U201 CHECK PC PC IS NOT GOING INTO DPM OFF MODE CHECK H/V SYNC LINE CHECK R442, R443 CHECK U201 PIN 27,28 SYNC PULSE ? 3 3 Waveforms R442 H-Sync 3 R443 V-Sync YES YES[...]

  • Page 22

    - 22 - Copyright 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 5. POWER NO POWER (POWER INDICATOR OFF) NO Trouble in Fuse (F101) CHECK 5V, 12V Line NO NO Check BD101 Check U101 Pin7 : 9~10V Check D102 Trouble in Q101 NO Trouble in D201, D202 YES CHECK Fuse F101 OK? CHECK C101 Voltage (AC1[...]

  • Page 23

    - 23 - Copyright 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 6. Raster NO Raster (Lamp Off) NO Check Scaler Output (Main Board) CHECK T301, T302 NO NO Check Q301, Q302 Check the waveform of U301 Pin11, 12, 19, 20 Check the waveform of U301 Pin11, 12, 19, 20 NO If waveform is no problem [...]

  • Page 24

    WIRING DIAGRAM - 24 - Copyright 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 11 P 6P 3P 30P 663190001 1H 6631T20023J 6631900109A 6631T20010E-L1733TR 6631900125A-L1933TR[...]

  • Page 25

    EXPLODED VIEW - 25 - Copyright 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 010 020 090 100 11 0 120 190 030 150 160 180 170 080 140 130 040 050 070 060[...]

  • Page 26

    EXPLODED VIEW P ARTS LIST - 26 - Copyright 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 010 020 030 040 050 060 070 080 090 100 110 120 130 140 150 160 170 180 190 ABJ32220472 Cabinet Assembly, L1753 . 17" SILVER best buy for L1733TR ABJ32229471 Cabinet Assembly, L1953 . 19" SI[...]

  • Page 27

    - 27 - Copyright 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only DATE: 2007. 02. 06. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C501 0CK104CF56A 0603B104K160CT 100nF 10% 16V C502 0CK473CH56A C1608X7R1E473KT 47nF 10% 25V C503 0CK473CH56A C1608X7R1E473KT 47nF 10% 25V C504 0CK473CH56[...]

  • Page 28

    - 28 - Copyright 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only DATE: 2007. 02. 06. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION U503 0ISG240860B M24C08-WMN6TP 8KBIT 1KX8BIT- L1733TR U503 0IMMR00203A FM24C08 8KBIT 1KX8BIT 2.7VTO- L1933TR U701 0IMMR00014A M24C02-RMN6TP 2KBIT 256X8BI[...]

  • Page 29

    - 29 - Copyright 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only DATE: 2007. 02. 06. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C101 0CZZ9ST017A AL EL CAPACITOR 100UF 450V 2 C103 0CZZ9ST014A AL EL CAPACITOR 33UF 50V 20% C104 0CH5271K416 270PF 2012 50V 5% NP0 R/TP C105 0CZZ9ST013A [...]

  • Page 30

    - 30 - Copyright 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only DATE: 2007. 02. 06. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R316 0RH2001D622 2K OHM 1 / 10 W 2012 5.00% D R317 0RJ3303E472 330000 OHM 1/8 W 1% 2012 R/T R318 0RJ1503E472 150K OHM 1/8 W 1% 2012 R/TP R319 0RH1303D622[...]

  • Page 31

    - 31 - Copyright 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only SCHEMA TIC DIAGRAM 1. SCALER[...]

  • Page 32

    2. POWER & W AFER - 32 - Copyright 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only[...]

  • Page 33

    3. INVERTER - 33 - Copyright 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only[...]

  • Page 34

    4. POWER - 34 - Copyright 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only[...]

  • Page 35

    Feb. 2007 P/NO : MFL43002807 Printed in Korea[...]