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Acer AL1917W Service Manual

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Manual - 12 pages
User manual - 16 pages
User manual - 10 pages

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  Summary of Contents for Acer AL1917W

  • Page 1 Acer Service Manual Service Manual LCD Monitor Acer AL1917W - 0 -...
  • Page 2 Copyright 2006 InnoLux Tech. Corp. Ltd All Rights Reserved This manual may not, in whole or in part, be copied, Photocopied, reproduced, translated, or converted to any electronic or machine readable form without prior written permission of InnoLux Tech. Corp. Ltd. Acer AL1917W Service Manual...
  • Page 3: Table Of Contents

    Acer Service Manual Table of Contents CHAPTER 1- PRECAUTIONS & SAFETY NOTICES ........................3 1. SAFETY PRECAUTIONS ................................3 2. PRODUCT SAFETY NOTICE ..............................3 3. SERVICE NOTES..................................3 CHAPTER 2- SERVICE TOOLS & EQUIPMENT REQUIRED ..................... 4 CHAPTER 3- CIRCUIT THEORY ..............................5 2.
  • Page 4: Chapter 1- Precautions & Safety Notices

    Acer Service Manual Chapter 1- PRECAUTIONS & SAFETY NOTICES 1. SAFETY PRECAUTIONS This monitor is manufactured and tested on a ground principle that a user’s safety comes first. However, improper used or installation may cause damage to the monitor as well as to the user.
  • Page 5: Chapter 2- Service Tools & Equipment Required

    Acer Service Manual Chapter 2- SERVICE TOOLS & EQUIPMENT REQUIRED 1. SIGNAL GENERATOR 2. MULTIMETER 3. SCREW DRIVER 4. OSCILLOSCOPE 5. Soldering IRON 6. SOLDER 7. VGA Cable (15pins point to point) 8. DVI Cable(DVI-D 24+1 pin) 9. Color Analyzer 10.
  • Page 6: Chapter 3- Circuit Theory

    Acer Service Manual Chapter 3- CIRCUIT THEORY 1. Monitor Block Diagram The LCD Monitor contains an interface board, and inverter/power/Audio board, keypad board and flat panel. In Inverter/power/Audio board, power section supplies +14V & +5V for Inverter/Audio and Interface board used. The inverter section drives the backlight of panel and the DC-DC conversion. The Audio section drives speaker (2 x1W).
  • Page 7: Electronic Circuit Theory

    Acer Service Manual 3. Electronic Circuit Theory 3.1 Switching Mode Power Supply 3.1.1 AC Current Input Circuit P801 is a connector for connecting AC Power. F801 is a fuse to protect all the circuit. AC input voltage is from 90v to 264V. R801 and R802 joined between two inputting main circuit to prevent man from shock.
  • Page 8: Inverter Circuit

    Acer Service Manual - Signal TTL horizontal sync. (Hsync) inputs via CN103 #13, and then clamped byZD106 Zener, passes through FB101,R130, and then goes into IC U105 (scaler) #27. - CN103#5 is defined as cable detect pin, this detector realize passes through R122 Pull hight, go into U105#35.
  • Page 9 Acer Service Manual for power MOSFET U501, U502. 2. OZ9938 provides two drive signals for U501, U502, and they work in push pull topology driving, two transformers are connected in parallel with each transformer driving two lamps in series. Turning each N-Channel MOSFET “on/off”...
  • Page 10: Chapter 4- Disassembly & Assembly

    Acer Service Manual Chapter 4- Disassembly & Assembly 1. Exploded Diagram...
  • Page 11: Disassembly Block

    Acer Service Manual 2. Disassembly Block AL1917W LCD Monitor BRACKET FINGER *1 HINGE *1 STAND*1 SCREW,B,CROSS,W/W-SPR,M4*20,Zn ASSY, BASE ROHS *3 BASE*1 RUBBER FOOT *4 GASKET*1 PLATE,BASE*1 T4*6,Zn, ROHS *2 ASSY STAND M4*8,Black Zn,NL ROHS *4 HINGE COVER*1 FRONT BEZEL *1...
  • Page 12: Assembly Block

    Acer Service Manual 3. Assembly Block PCBA Power *1 SCREW PW,CROSS,W/WAS, M3*5,NI*3 SCREW,P,CROSSW/W-SPR,M3*6,Zn,ROHS*1 SPEAKER*1 PCBA I/F BOARD *1 CABLE 30 PIN FFC PANEL INNOLUX SCREW,PW,CROSS,W/WAS, M190A1-L01 M3*5,NI*1 BOLT,#4-40x11.8,Ni ROHS ASSY PANEL*1 *2(W/O DVI )or 4(W/DVI) SCREW,P,CROSS,W/WAS, M3*4,Zn*4 CHASSIS *1 TAPE,MYLAR*1...
  • Page 13: Chapter 5- Test And Adjustment

    Acer Service Manual Chapter 5- TEST AND ADJUSTMENT 1. GENERAL POINTS 1.1 Test Equipment or Tool 1.1.1 Test pattern generator: PC or video pattern generator (Chroma-2326/2160/2130) 1.1.2 Color analyzer: Chroma-7120 1.1.3 Power meter: AC Source Chroma-6408 1.1.4 Electrical safety tester: Chroma (Zentech) 9032A 1.1.5 Stereo source: Music or signal generator input...
  • Page 14: Burn-In (Aging) Pattern

    Acer Service Manual 1.5.3 Process To Access Factory Mode Power Off Press “AUTO”& ”MENU”button at the same time Power On Release the “AUTO”& ”MENU” button Press “MENU” Button < Press “ ” Button Press “Menu” Button Enter the factory Mode 1.6 Burn-in (Aging) Pattern...
  • Page 15 Acer Service Manual 2.1.1 VESA Analog The video input consists of red, green, and blue signals. The video signals are analog levels, where 0V corresponds to black and 700mV is the maximum signal amplitude. Input impedance of video pins is 75 ohm ±1%.
  • Page 16: Function Check

    Acer Service Manual Length: 1.8 m +/- 50 mm (fixed) Connector type: D-sub male. With DDC_2B pin assignments. Blue connector thumb-operated jack screws Pin Assignment: SIGNAL PIN No. SIGNAL Red video input VGA +5V Green video input Blue video input...
  • Page 17: Vga Cable Detect Test

    Acer Service Manual sync) Power off < 1W No display 3.6 VGA Cable Detect Test If VGA cable of LCD monitor isn’t connected to video pattern generator or PC, “NO SIGNAL” should be shown on screen. 3.7 Hi-Pot test Test condition: a.
  • Page 18: Picture Check

    Acer Service Manual Majo Defect Type Specification Size Count (N) Minor Black spots which appear Dot Shape(Particle、Scratch when B/L operating and Bubbles in Display area or on The Polarizer) ● 0.15mm ≤ D ≤ 0. 5 mm N ≤ 3 Line Shape L ≤...
  • Page 19: Color Temperature Check

    Acer Service Manual 5.1.4 Set brightness and contrast to be maximum, apply pattern as Fig.3, it should be the following requirement: Min. luminance nine points (backlight ≡ 75 Max. luminance nine points (backlight Fig. 3 5.2 Color Temperature Check 5.2.1 Test mode: 1440x900 @ 60 Hz 5.2.2 Test pattern: pattern #41 of “WHITE”...
  • Page 20: Brightness Out (Video Signal Input 700Mv ± 2%)

    5.4.3 If writing EEPROM is successful, and then shows text "PASS" on screen; if writing EEPROM is failure, then shows text "FAIL". 5.4.4 EDID data: (For example) AL1917W DVI EDID table: 00 FF FF FF FF FF FF 00 29 1A 78...
  • Page 21: Chapter 6- Trouble Shooting

    Acer Service Manual Chapter 6- TROUBLE SHOOTING 1. No Power & LED Off No power Check primary Check circuit Check IC802, rectifier voltage if short C804, T801, Check F801, P801, RT,801,D801 Check pin6 of CheckC810,D803,C807, IC802 voltage about 12V Check primary OVP, OLP...
  • Page 22 Acer Service Manual 2. Unstable Power Unstable power Check sampling Check R822, Circuit R823, R824 Change R822, R823, R824 Check the C pin Check the R pin voltage of IC803 Change voltage of IC803 if 3V IC803 about 2.5V Check R819, R820...
  • Page 23 Acer Service Manual 3. No raster...
  • Page 24 Acer Service Manual 4. Black screen Black screen Check power supply:pin 1,2 of Power fail CN101 Check FB102,FB103, Check power supply FB105,FB106 for U105 Check reset (pin84) of Check C144,R172 U105 Check crystal (pin 96,97) Check waveform of U105 X101,C153,C154...
  • Page 25 Acer Service Manual 5. Bad Screen B ad S creen L V D S C able W orkm anship R einsert C hange L V D S L V D S C able N G C able C heck C rystal:...
  • Page 26 Acer Service Manual 6. White screen White screen LVDS Cable Workmanship Reinsert Change LVDS cable NG LVDSCable Check VLCD Check LVDS Panel Fail is 5V signal Check Panel-Enable of U105 Fail U105(pin48) Check Q101,Q103,Q110, C108, C109...
  • Page 27 Acer Service Manual 7 No Sound No Sound Re-insert or Change the Line-in Cable Power Fail Check Vs of IC 701? Check the Input of IC 701 Check the output of IC 701 Check the Mute and Volume pins of IC...
  • Page 28: Attachment 1- Bill Of Material

    Acer Service Manual Attachment 1- Bill of Material PCBA P+I...
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  • Page 31 Acer Service Manual PCBA IF...
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  • Page 33 Acer Service Manual PCBA KEY PAD...
  • Page 35 From Power & Inverter...