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Acer B203H Service Manual

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Acer B203H
Service Guide
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  • Page 1 Acer B203H Service Guide...
  • Page 2 Service Guide Version and Revision Version Release Date Revision History TPV model TARSNDD8WDAYDN Sep.-22-2008 Initial Release TARSNDD8WDAYHN...
  • Page 3 Any Acer Incorporated software described in this manual is sold or licensed "as is". Should the programs prove defective following their purchase, the buyer (and not Acer Incorporated, its distributor, or its dealer) assumes the entire cost of all necessary servicing, repair, and any incidental or consequential damages resulting from any defect in the software.
  • Page 4 DIFFERENT part number code to those given in the FRU list of this printed Service Guide. You MUST use the list provided by your regional Acer office to order FRU parts for repair and service of customer machines. Warning: (For FCC Certified Models) Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules.
  • Page 5 Precautions Do not use the monitor near water, e.g. near a bathtub, washbowl, kitchen sink, laundry tub, swimming pool or in a wet basement. Do not place the monitor on an unstable trolley, stand, or table. If the monitor falls, it can injure a person and cause serious damage to the appliance.
  • Page 6: Table Of Contents

    Table Of Contents Chapter 1 Monitor Features ………………………………………… Introduction ……………………………………… Electrical Requirements ……………………………………… LCD Monitor General Specification ……………………………………… LCD Panel Specification ……………………………………… Support Timing ……………………………………… Monitor Block Diagram ……………………………………… Main Board Diagram ……………………………………… Software Flow chart ……………………………………… Main Board Layout ………………………………………...
  • Page 7: Chapter 1 Monitor Features

    This will alleviate the growing health concerns. It is also a space saving design, allowing more desktop space, and comparing to the traditional CRT monitor, it consumes less power and gets less weight in addition MTBF target is 50k hours or more. Chart of B203H Panel LTM200KT01 SEC KR Signal Interface D-Sub 15pin;DVI 24pin...
  • Page 8: Electrical Requirements

    Electrical Requirements Standard Test Conditions All tests shall be performed under the following conditions, unless otherwise specified. Ambient light Dark room (< 1 cd/m Viewing distance 40 cm for LCD performance, 20 cm for LCD failures Warm up time >30 minutes Analog Input signal 700 mVss Control temperature...
  • Page 9: Lcd Monitor General Specification

    LCD Monitor General Specification Driving system TFT Color LCD Active Display Area 442.8 (W) × 249.075(H) Pixel pitch 0.2768(H) x 0.2768(W) LCD Panel Contrast Ratio 1000 : 1 Response time Luminance of White 300(Typ.) cd/㎡ Separate Sync. H/V TTL Input H-Frequency 30kHz –...
  • Page 10: Lcd Panel Specification

    LCD Panel Specification General Specifications Block Diagram TFT LCD Module...
  • Page 11 Back light Unit Electrical Characteristics...
  • Page 12 Optical Specifications...
  • Page 13: Support Timing

    Support Timing...
  • Page 14: Monitor Block Diagram

    The LCD MONITOR will contain a main board, a power board, an audio board and a key board 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. B203H+AUDIO: Flat Panel and CCFL Drive. CCFL backlight...
  • Page 15: Main Board Diagram

    Main Board Diagram Panel Interface (CN301) Scalar IC NT68667FG Keypad Interface (Include MCU, ADC, OSD) (CN402) EEPROM (U401) M24C16 (U403) H sync D-Data V sync D-Clock D-Sub Flash Memory Crystal Connector Connector PM25LV010A-100SCE 12MHz (CN101) (CN102) (U402) (X401)
  • Page 16: Software Flow Chart

    Software Flow Chart...
  • Page 17 Remark: 1) MCU initializes. 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 18: Main Board Layout

    Main Board Layout Symbol Description Symbol Description U401 IC NT68667FG QFP-128L CN603 WAFER EH-4 U703 IC AP1117D33L-13 TO252-3L DIODES CN701 WAFER 9P RIGHT ANELE PITCH U103 IC AZC099-04S SOT23-6L CN301 CONNECTOR U104 IC AZC099-04S SOT23-6L X401 CRYSTAL 12MHz HC-49US ARG6-120 U402 IC PM25LV010A-100SCE SOIC-8 CN101...
  • Page 19: Installation

    Installation To install the monitor on your host system, please follow the steps below: Steps...
  • Page 20: Screen Position Adjustment

    Screen Position Adjustment...
  • Page 22: Chapter 2 Operating Instructions

    Chapter 2 Operating Instructions Press the power button to turn the monitor on or off. The other control buttons are located at front panel of the monitor. By changing these settings, the picture can be adjusted to your personal preferences. •...
  • Page 23: Ecolor Management (Osd)

    eColor Management (OSD)
  • Page 24: How To Adjust A Setting

    How to Adjust a Setting...
  • Page 25 Adjusting the picture...
  • Page 27: How To Optimize The Dos-Mode

    How To Optimize The DOS-Mode Plug And Play Plug & Play DDC2B Feature This monitor is equipped with VESA DDC2B capabilities according to the VESA DDC STANDARD. It allows the monitor to inform the host system of its identity and, depending on the level of DDC used, communicate additional information about its display capabilities.
  • Page 28: Chapter 3 Machine Disassembly

    Chapter 3 Machine Disassembly This chapter contains step-by-step procedures on how to disassemble the monitor for maintenance. Disassembly Procedure 1. Remove the hinge assembly. Remove the back cover and bezel.
  • Page 29 3. Remove the lamp connectors and remove the screws to remove the panel. Put attention to the LVDS cable. 4. Remove the screws to remove the main board and power board.
  • Page 30 FOR THE V203H+AUDIO MODLE 5. The panel...
  • Page 31: Chapter 4 Troubleshooting

    Chapter 4 Troubleshooting This chapter provides troubleshooting information for the B203H: 1. No Power No power Press power key and look if the picture is normal Please reinsert and make sure the AC of 100-240 is normal Reinsert or check the power section Measure U703 Pin2=3.3V,...
  • Page 32 2. No Picture (LED is orange) No picture The button if under X401 oscillate Replace X401 control waveform is normal Check reset circuit of Check Correspondent U401 is normal component Measure U703 Pin2=3.3V, Replace U401 X401 oscillate waveform is normal Check U703, C706 and C707 Replace X401 Check HS/VS from...
  • Page 33 3. Panel Power Circuit White screen Measure Q302 base X401 oscillate is low level? waveform is normal Replace X401 Check CN301is solder Check reset circuit of and Q302,Q301 is OK? U401 is normal Check Correspondent Check Correspondent component. component. Replace U401 Replace PANEL...
  • Page 34 4. Key Board OSD is unstable or not working Connect Key Board Is Key Pad Board connecting normally? Replace Button Switch Is Button Switch normally? Replace Key Board Is Key Pad Board normally? Check Main Board...
  • Page 35 5. Power Board 1) No power Check CN902 pin4, 5 = 14V Check AC line volt 110V or 220V Check AC input Check the voltage of C905(+) Check bridge rectified circuit and F901 circut Check start voltage for the pin8 of IC901 Check R904, R932, R933, and Change IC901 Check the auxiliary voltage is bigger than 10V and smaller than 20V...
  • Page 36 2.) No Backlight Check CN902 pin4, 5 = 14V Check the adapter or MB Check ON/OFF signal Check Interface board Check IC801 PIN12=12V Change Q808 Check the PWM wave from the pin9,10 of IC801 Change IC801 Check Q802, Q803 PIN5, 6, 7, 8 have the output of square wave at short time.
  • Page 37: Chapter 5 Connector Information

    Chapter 5 Connector Information...
  • Page 38: Chapter 6 Fru (Field Replacement Unit) List

    NOTE: To scrap or to return the defective parts, you should follow the local government ordinance or regulations on how to dispose it properly, or follow the rules set by your regional Acer office on how to return it. Exploded Diagram (Model: B203H)
  • Page 39 BEZEL L201WA-8ACER1-P1 HINGE ASSEMBLY POWER LENS SCREW,42-D020523 KEY BUTTON SCREW MAINFRAME SCREW SHIELD SCREW,42-D020523 REAR COVER B203H DVI SCREW COVER HINGE B203H: BEZEL L201WA-8ACER1-P1 COVER HINGE POWER LENS HINGE ASSEMBLY KEY BUTTON SCREW,42-D020523 MAINFRAME SCREW SHIELD SCREW REAR COVER B203H DVI...
  • Page 40 Part List Above picture show the description of the following component. Item Picture Description Main Frame Bezel Panel...
  • Page 41 Power Board Main Board Audio Board(B203H+AUDIO)...
  • Page 42: Schematic Diagram

    Chapter 7 Schematic Diagram Main Board...
  • Page 46 Power board...
  • Page 48 Audio board (for B203H+AUDIO)
  • Page 49: Key Board

    Key board ZD001 UDZSNP5.6B add ZD001 and ZD002 for ESD solution LED001 LED CN001 ZD002 UDZSNP5.6B LBADC1 R001 2K OHM 1/16W LBADC2 LED_BLUE# POWER_Key LED_RED# LED_BLUE# LED_RED# R002 2K OHM 1/16W C001 C002 C003 C004 C005 CONN R003 1K 1/16W 5% MENU LBADC1 VOL-...

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X233h