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AOC LM520i Service Manual

With cptxg08 panel
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SERVICE MANUAL

LM520i Monitor
(With CPTXG08 PANEL)
THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY.EVERY
REASONABLE EFFORT HAS BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL;
WE CANNOT GUARANTEE THE ACCURACY OFTHIS INFORMATION AFTER THE DATE OF
PUBLICATION AND DISCLAIMS RELIABILITY FOR CHANGES, ERRORS OR OMISSIONS.
MANUFACTURE DATA ：Feb-22-04

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Summary of Contents for AOC LM520i

  • Page 1: Service Manual

    SERVICE MANUAL LM520i Monitor (With CPTXG08 PANEL) THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY.EVERY REASONABLE EFFORT HAS BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL; WE CANNOT GUARANTEE THE ACCURACY OFTHIS INFORMATION AFTER THE DATE OF PUBLICATION AND DISCLAIMS RELIABILITY FOR CHANGES, ERRORS OR OMISSIONS.

  • Page 2: Table Of Contents

    TABLE OF CONTENTS PAGE 1. SPECIFICATIONS ....................GENERAL SPECIFICATIONS ...........…....LCD MONITOR DESCRIPTION ..............INTERFACE CONNECTOR ..............……. 2. PRECAUTION AND NOTICES ................ASSEMBLY PRECAUTION ................. OPERATIONG PRECAUTION ..............STORAGE PRECAUTION …................ HIGH VOLTAGE WARNING ............... 3. OPERATING INSTRUCTIONS ................4. ADJUSTMENT ......................ADJUSTMENT CONDITIONS AND PRECAUTIONS .......

  • Page 3: Specifications

    1. SPECIFICATIONS FOR LCD MONITOR General specifications LCD-PANEL : Active display area 15 inches or 15.1 inches diagonal Pixel pitch 0.297 mm x 0.297 mm Pixel format 1024 x 768 RGB vertical stripe arrangement Display Color : 6-bit, 262144 colors or 8-bit, 16.7 million colors External Controls : ●...

  • Page 4: Lcd Monitor Description

    LCD MONITOR DESCRIPTION The LCD MONITOR will contain an main board, an inverter/power board, keypad board and internal adapter which house the flat panel control logic, brightness control logic and DDC. The power board will provide AC to DC Inverter voltage to drive the backlight of panel and the main board chips each voltage.

  • Page 5: Precaution And Notices

    2. PRECAUTIONS AND NOTICES ASSEMBLY PRECAUTION (1) Please do not press or scratch LCD panel surface with anything hard. And do not soil LCD panel surface by touching with bare hands (Polarizer film, surface of LCD panel is easy to be flawed) In the LCD panel, the gap between two glass plates is kept perfectly even to maintain display characteristic and reliability.

  • Page 6: Operating Instructions

    3. OPERATING INSTRUCTIONS This procedure gives you instructions for installing and using the LM520 LCD monitor display. Position the display on the desired operation and plug–in the power cord into External Adapter AC outlet. Three- wire power cord must be shielded and is provided as a safety precaution as it connects the chassis and cabinet to the electrical conduct ground.

  • Page 7: Adjustment

    4. ADJUSTMENT ADJUSTMENT CONDITIONS AND PRECAUTIONS Adjustments should be undertaken only on following function : contrast, brightness focus, clock, H-position, V- position, red, green, blue since C1 color & C2 color. No volume adjust description ADJUSTMENT METHOD Press MENU button to activate OSD Menu or make a confirmation on desired function, Press Left/Right button to select the function or done the adjustment.

  • Page 8: Front Panel Control Knobs

    Press MENU button for 2 seconds along with plug-in AC power cord will be in factory mode, and the OSD screen left top of panel but take cautions will located at don’t press icon “C2” & “C1”, if you press C2/C1 , your white-balance data will overlap with the new-one, and you must perform the white-balance process again.

  • Page 9: Circuit & Software Description

    5. CIRCUIT-DESCRIPTION PANEL SPECIFICATION (CPT XG08) 5-1-1Panel Feature － 15” XGA TFT LCD Panel － 2 CCFLS Backlight System － Supported (H1024Pixel × V768Lines) resolution － By applying 6 bit digital data 5-1-2 Display Characteristics Items Specification Unit Display Area 304.128(H) x 228.096 (V) Driver element a-Si TFT active matrix...

  • Page 10: Special Function With Press Key

    ITEM SYMBOL MIN. TYP. MAX. UNIT REMARK Input voltage 10.8 13.2 Input current 2250 2500 FOR 4 LOAD Output Current Iout FOR 1 LOAD Frequency FOR 1 LOAD 50.0 55.0 60.0 H.V open 1450 1600 1750 Vrms NO LOAD Vopen RL=120KΩ...

  • Page 11: Simple Introduction About Lm500 Chipset

    b. INPUT frequency out of VESA-spec. (out of tolerance too far) 3. UNSUPPORT mode, try different Video-card Setting: Input frequency out of tolerance, but still can catch-up by our system (if this message show, that means, this is new- user mode, AUTO-CONFIG will disable) SIMPLE-INTRODUCTION about LM520A chipset Interface (CN501/CN502))
  • Page 12 Inverter Block Diagram...

  • Page 13: Software Flow-Chart

    SOFTWARE FLOW CHART...
  • Page 14 1) MCU initialize. 2) Is the eeprom blank ? 3) Program the eeprom by default values. 4) Get the PWM value of brightness from eeprom. 5) Is the power key pressed ? 6) Clear all global flags. 7) Are the AUTO and SELECT keys pressed ? 8) Enter factory mode.

  • Page 15: Trouble Shooting

    Trouble Shooting 6-1.MAIN BOARD 1.NO SCREEN APPEAR Check CN504 pin 10 = 2.5 V? Check Correspondent component. Check CN504 pin 8 = 3.3 V? Is there any shortage or cold solder? Check CN504 pin 4 = 5 V? Check Power Board. Measured CN402 pin 1/2 = 5V? Measured CN402 pin 3/4 = Yes, all DC level exist...
  • Page 16 PANEL-POWER CIRCUIT Check the PPWR panel power relative circuit, R223、Q200、Q201(pin2) In normal operation, when LED =green, R223 check R824 should have response from 14V t should =0 v, If PPWR no-response when the power switch When we switch the power switch from on t Turn on and turn off, replace the U501-GMZAN1 OK,R225 have Check Q201 pin 3= 3.3V...
  • Page 17 2.PANEL POWER CIRCUIT Check the PPWR panel power relative circuit, Q501, Q502 check R507 should have response In normal operation, when LED =green, R507 should =0 v, from 0V to 3.3V If PPWR no-response when the power switch When we switch the power switch from Turn on and turn off, replace the U203-GM5120/2120 on to off NG, no Voltage...
  • Page 18 4.U203-DATA OUTPUT Measured DCLK DVS, DHS (pin 117,116 NG , no transition from U203 ) Is the waveform ok? DCLK around 40 MHz , DVS=60.09Hz , DHS Replace GM5115 /2115 around 80 KHz ?(refer to input signal= (U203) or replace Main 640x480@60 Hz 31k, and LED is Green) board.

  • Page 19: B). Inverter - Module Trouble Shooting Chart

    6-2.Power/Inverter Board 1.) No power...
  • Page 20 2.) W / LED , No Backlight...

  • Page 21: Mechanical Of Cabinet Front Dis-Assembly

    MECHANICAL OF CABINET FRONT DIS-ASSEMBLY SCREW Q1A340-16-128X4 REAR COVER 34A675 SHIELD 85A548 MAIN BOARD MAIN FRAME 15A5683(HANNSTAR) SCREW Q1A1030-12-128X4 INVERTER SHIELD 85A577 LCD PANEL 750ALCDX41-1 INVERTER BOARD 79AL15-6-S SUPPORT(BACK) 34A677 ADAPTER BOARD 80AL15-2-L1 HINGE SUPPORT(FRONT) 37A442 34E676 KEPC KEPC560EKMN SHIELD KEY PAD 85A580 33A4095...

  • Page 22: Parts Listing

    7. BOM LIST: T562KCDHLXMGN 插件位置 元件料号 品名规格 组成用量 单位 CBPC560KCDAC CONVERSION BOARD FOR T5 1 PCS KEPC562KD1 KEY BOARD FOR T562K* 1 PCS PWPC5215A1E1 POWER BOARD FOR T560K*H 1 PCS 5 L 18 PAPER PALLET 0.0067 PCS 5 L 19 PAPER PALLET 0.0067 PCS 15L5908 1...
  • Page 23 85L 634 11 SHIELD 1 PCS 89L 176 50 N 0 PCS 89L1735GAA D1 SIGNAL CABLE 1 PCS 89L176J 50 N 1 PCS 89L412A15N IS POWER CORD 0 PCS 89L412A15N YH POWER CORD 1 PCS 95L8021 12501 HARNESS 12P 40mm 1 PCS M1L 330 4128 SCREW M3X4...
  • Page 24 56L 566 6 SI9953DY-T1 1 PCS 56L 585 7 RT9164-25CL 1 PCS 56L1133 33 M24C16-MN6T 1 PCS 56L1133 34 M24C02-WMN6T SMT 1 PCS 56L4LVC 14 P 74LVC14ADT 1 PCS 57L 417 4 PMBS3904/PHILIPS-SMT(04 1 PCS 57L 417 4 PMBS3904/PHILIPS-SMT(04 1 PCS 61L 125103 8 CHIP AR 8P4R 10KOHM +-5 1 PCS...
  • Page 25 61L0603103 CHIPR 10K OHM +-5% 1/10 1 PCS 61L0603103 CHIPR 10K OHM +-5% 1/10 1 PCS 61L0603103 CHIPR 10K OHM +-5% 1/10 1 PCS 61L0603103 CHIPR 10K OHM +-5% 1/10 1 PCS 61L0603103 CHIPR 10K OHM +-5% 1/10 1 PCS 61L0603103 CHIPR 10K OHM +-5% 1/10 1 PCS...
  • Page 26 65L0603103 32 0.01UF+-10% 50V X7R 1 PCS 65L0603103 32 0.01UF+-10% 50V X7R 1 PCS 65L0603103 32 0.01UF+-10% 50V X7R 1 PCS 65L0603103 32 0.01UF+-10% 50V X7R 1 PCS C119 65L0603104 12 0.1UF +-10% 16V X7R 1 PCS 65L0603104 12 0.1UF +-10% 16V X7R 1 PCS C121 65L0603104 12...
  • Page 27 65L0603104 37 CHIP 0.1UF 50V/Y5V 1 PCS 65L0603104 37 CHIP 0.1UF 50V/Y5V 1 PCS 65L0603473 32 CHIP 0.047UF 50V X7R 1 PCS 65L0603509 31 CHIP 5PF+-0.5PF 50V NPO 1 PCS 65L0603509 31 CHIP 5PF+-0.5PF 50V NPO 1 PCS C111 67L 312101 3 SMD 100UF +-20% 16V 1 PCS C117...
  • Page 28 93L 39149 MLL5232B BY FULL POWER 0 PCS 93L 60220 BAT54C-GS08 0 PCS 93L 60230 BAT54C(L43) 1 PCS 93L 64 32 LL4148 SMD 0 PCS 93L 6432V LL4148-GS08 1 PCS 93L 6433P BAV99 1 PCS 93L 6433P BAV99 1 PCS 93L 6433P BAV99 1 PCS...
  • Page 29 40L 45762412A CBPC LABEL 1.03 PCS RTV 胶 6 4500 RTV 胶 6 4502 RTV 胶 6 4503 IC902 56L 139 3 PC123FY2 BY SHARP 0 PCS IC902 56L 139 3A PC123Y22 1 PCS IC902 56L 139 3B PC123 Y82 0 PCS IC901 56L 379 32...
  • Page 30 L201 73L 253139 YL CHOKE 0 PCS L201 73L 253139LSL CHOKE COIL 1 PCS PT201 80LL15T 7 DN X'FMR 0 PCS PT201 80LL15T 7 YS X'FMR 1 PCS T901 80LL17T 2 L ADAPTOR BY LITAI 0 PCS T901 80LL17T 2 T X'FMR 0 PCS T901...
  • Page 31 R926 61L0805240 1F CHIPR 2.4KOHM +-1% 1/8W 1 PCS R916 61L0805240 2F CHIP 24KOHM 1% 1/8W 1 PCS R925 61L0805261 1F CHIP 2.61KOHM 1/8W 1% 1 PCS F902 61L1206000 4 0 OHM 4A 1/4W 1 PCS R912 61L1206101 CHIP 100 OHM 5% 1/4W 1 PCS R219 61L1206102...
  • Page 32 ------- ------------------------ ----------------------- ---------- ---- C207 67L 309330 7T 33UF 1 PCS C905 6L 31502 1.5MM RIVET 2 PCS L902 6L 31502 1.5MM RIVET 4 PCS PT201 6L 31502 1.5MM RIVET 2 PCS T901 6L 31502 1.5MM RIVET 4 PCS 715L1034 1A 1 1 PCS J101...
  • Page 33 Q207 57L 414 2 MPS3906 1 PCS Q205 57L 417 3 T MPS3904 1 PCS Q902 57L 419 PP T 2PC945P 1 PCS Q901 57L 420 PP T 2PA733P 1 PCS C911 64L700J1020AT 1000PF 50V PEN 1 PCS C204 64L700J1040AT 0.1UF 50V PEN 1 PCS C909...

  • Page 34: Schematic

    37L 446 1 LCD HINGE (L501-C) 1 PCS M1L 340 8128 SCREW 2 PCS Q1L 330 8120 SCREW 3X8mm 2 PCS Q1L 340 8128 SCREW 4X8mm 1 PCS AM1L1740 12128 SCREW 4 PCS Schematic 3.3V_DDDS FB201 FB202 600 OHM C223 600 OHM C225 +3.3V...
  • Page 35 R358 　 +3.3V +2.5V +12V +2.5V +3.3V 1/16W CN504 R356 R357 4.7K 　 1/16W 　 1/16W BKLT_EN PBIAS PWM0 C354 C358 C359 C367 C353 C360 0.1uF/16V 0.1uF/16V C364 C365 C366 C362 C361 0.1uF/16V 470uF/16V 470uF/16V 0.1uF/16V C363 0.1uF/16V 470uF/16V CONN 0.1uF/16V 0.1uF/16V 0.1uF/16V...
  • Page 36 0.47uF/25V C207 4.7uF R207 C204 0.1uF U201 TL1451ACNSR C208 R204 　 330pF 1/16W AOC (Top Victory) Electronics Co., Ltd. is power GND Title INVERTER Size Document Number is signal GND 星期四, 五月 15, 2003 Date: Sheet R920 C920 　 1/2W 0.001uF/500V...

  • Page 37: Pcb Layout

    10. PCB Layout 10-1 .Main Board 715L1039-1...
  • Page 39 10-2 .Inverter/Power Board 715L1034-1...

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