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Acer B243W Service Manual

Acer computer monitor user manual
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Acer B243W
Service Guide
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  • Page 1 Acer B243W Service Guide...
  • Page 2 Service Guide Version and Revision Version Release Date Revision History TPV model TK7SMHDBW7AYBC/ Apr.-3-2008 Initial Release TK7SMHDKW7AYBC...
  • 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

    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 Installation Attaching/Removing the base Chapter 2 Operating Instructions External Controls Front Panel Controls eColor Management (OSD) How to Adjust a Setting LOGO...
  • Page 7: Chapter 1 Monitor Features

    50k hours or more. Panel Signal Interface Sync Type Color Temp User Adjust Speaker Headphone Jack Microphone Jack USB Hub Tilt / Swivel Chart of B243W LTM240CT01 801(A01) D-Sub 15-pin/ DVI 24-pin Separate / Compatible Support DDC2B Yes / Yes Chapter 1...
  • Page 8: Electrical Requirements

    Electrical Requirements Standard Test Conditions All tests shall be performed under the following conditions, unless otherwise specified. Ambient light Viewing distance Warm up time Analog Input signal Control temperature Brightness control User contrast control Picture position and size Viewing angle AC Supply voltage Ambient temperature Humidity...
  • Page 9: Lcd Monitor General Specification

    LCD Monitor General Specification Driving system Active Display Area Pixel pitch LCD Panel Contrast Ratio Response time Luminance of White Separate Sync. Input H-Frequency V-Frequency Viewing angle (H)160 (V) 160(Type) Display Colors 16.7M Display mode 1920 x 1200 @60Hz ON Mode EPA ENERGY STAR®...
  • Page 10: Lcd Panel Specification

    LCD Panel Specification LTM240CT01 is a color active matrix liquid crystal display (LCD) that uses amorphous silicon TFT (Thin Film Transistor) as switching components. This model is composed of a TFT LCD panel, a driver circuit and a back light unit.
  • Page 11 Electrical Characteristics...
  • Page 12 Optical Specifications...
  • Page 13: Support Timing

    Support Timing VESA MODES Mode Resolution 640x480@60Hz 640x480@72Hz 640x480@75Hz 800x600@56Hz 800x600@60Hz SVGA 800x600@72Hz 800x600@75Hz 1024x768@60Hz 1024x768@70Hz 1024x768@72Hz 1024x768@75Hz 1152x864@75Hz 1280x1024@60Hz 1280x1024@70Hz SXGA 1280x1024@72Hz 1280x1024@75Hz 1280x960@60Hz 1440x900@60Hz WSXGA 1680x1050@60Hz WUXGA 1920*1200@60HZ UXGA 1600x1200@60Hz Horizontal Nominal Sync Total Frequency Polarity +/- 0.5KHz 800 x 525 31.469 832 x 520...
  • Page 14: Monitor Block Diagram

    Monitor Block Diagram The LCD MONITOR will contain a main board, an inverter board, an adapter board, a key board and a USB 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.
  • Page 15: Main Board Diagram

    Main Board Diagram Crystal 24MHZ/30PF/49US (X402) MTV416GMV (U407) EPR_SDA EPR_SCL Key Board EEPROM Control M24C16 (CN405) (U408) LCD Interface (CN703) Scalar IC MST9200HA-LF-165 (Include ADC, OSD) (U403) H sync Digital V sync Video Signal D-Sub Connector Connector (CN401) (CN402) DB15_SDA, DB15_SCL EEPROM EEPROM...
  • 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 CN402 D-SUB 15PIN CN401 DVI 24PIN CONN F CN703 WAFER 30P 2.0MM DIP DUAL ROW CN701 WAFER 14P RIGHT ANGLE PITCH CN405 WAFER 6P RIGHT ANGLE PITCH 2.0 U407 MTV416GMV U402 M24C02-WMN6TP X402 24MHZ/30PF/49US Symbol Description U403 IC MST9200HA-LF-165 PQFP-208...
  • Page 19: Installation

    Installation To install the monitor on your host system, please follow the steps below: Steps 1.Connect the video cable A: Make sure both the monitor and computer are switched off. B: Connect the VGA video cable to the computer. C: Connect the digital cable (only for dual-input models). (1) Make sure both the monitor and computer are switched off.
  • Page 20: Attaching/Removing The Base

    Attaching/Removing The Base Install: Align the base with the stand and push the base towards the top of the monitor, and then rotate the base clockwise. Tighten the screw clockwise. Remove: Reverse the steps to remove the base. Screen Position Adjustment In order to optimize the best viewing position, you can adjust the height/tilt/swivel/pivot of the monitor.
  • Page 21 Tilt Please see the illustration below for an example of the tilt range. Swivel With the built-in pedestal, you can swivel the monitor for the most comfortable viewing angle. Monitor Pivot Adjust height to the top position before rotation the monitor. Rotate clockwise until the monitor stops at 90°.
  • 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: Logo

    Logo When the monitor is power on, the LOGO will be showed in the center, and disappear slowly. 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

    Machine Disassembly This chapter contains step-by-step procedures on how to disassemble the monitor for maintenance. Disassembly Procedure 1. Remove the hinge assembly as the following indicator. (Fig 1~2) Fig 1 Fig 2 Chapter 3...
  • Page 29 2. Remove the back cover, bezel and remove the screws remarked in red in order to remove the main board below. (Fig 3~Fig 4) Fig 3 Fig 4 3. Release the shield inverter and lamp connectors. (Fig 5-7) Fig 5 Fig 6 Fig 7...
  • Page 30 4. Remove the screws remarked in red and release the connector remarked in blue to remove the USB board.(Fig 8) Fig 8 5. Remove the screws to remove the panel. Pay attention to the LVDS cable.(Fig 9-10) Fig 9 Fig 10...
  • Page 31 6. Remove the screws to remove the main board, adapter board and inverter board.( Fig 11) Fig 11...
  • Page 32: Chapter 4 Troubleshooting

    Troubleshooting This chapter provides troubleshooting information for the B243W: 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 Measure U701, U702 Pin2=3.3V, U703 Pin1=1.8V...
  • Page 33 2. No Picture (LED is orange) No picture The button if under control Measure U701, U702 Pin2=3.3V, U703 Pin1=1.8V Check HS/VS from CN402 is normal Replace U403 X401 oscillate waveform is normal Check reset circuit of U407 is normal Replace U407 Replace U701,U702, U703...
  • Page 34 3. White screen White screen Measure Q707 base is low level? Check Q705,Q706,Q707 broken or CN703 solder? Replace PANEL Check U403/U407 Check Correspondent component. Replace U403/U407 X402 oscillate waveform is normal Replace X402...
  • Page 35 4. Key Board OSD is unstable or not working Is Key Pad Board connecting normally? Connect Key Board Replace Button Switch Is Button Switch normally? Replace Key Board Is Key Pad Board normally? Check Main Board...
  • Page 36 5. Adapter/Inverter Board No power No power Check CN902 Pin3~7 = 24 V Check AC line volt 120V or 220V Check the voltage of C914 (+) Check start voltage for the Pin6 of IC903 Repearing the start voltage Check T901,T902,IC901,IC902,Q901,Q902 Check D953, IC955,IC954,C964,C965,C966,IC950,IC953,ZD950,Q950 Check Interface board Check bridge retified circuit...
  • Page 37 W/LED No Backlight Check the 24V voltage input Check ON/OFF signal Check the voltage of IC801 pin2 Check the pin1&15 of IC801 have PWM wave Check Q802,Q804,Q808,Q809 Drain wave Check the output of PT801~PT812 Check connecter & lamp Check the adapter Check Interface board Change Q805.Q806 or Q807 Replace IC801...
  • Page 38: Chapter 5 Connector Information

    Chapter 5 Connector Information The following figure shows the connector locations on the monitor: D-SUB connector...
  • Page 39 DVI Connector...
  • Page 40: 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: B243W)
  • Page 41: Part List

    Part List Above picture show the description of the following component. Item Picture Description Hinge Assembly Main Frame Panel...
  • Page 42 Adapter Board...
  • Page 43 Inverter Board Main Board USB Board...
  • Page 44 LVDS Cable...
  • Page 45: Schematic Diagram

    Schematic Diagram Main Board POWER INPUT CN701 +12V +12V +12V REV:C ON_OFF Dimming PS_ON C705 1000uF/16V CONN C709 0.1uF REV:C NC C713 22uF 16V PANEL_EN REV:C R710 POWER ON R711 100K 1/10W 5% 10K 1/10W 5% POWER OFF R714 2N3904S-RTK/PS Q707 PANEL_EN 2N3904S-RTK/PS...
  • Page 46 CN401 RX2-IN RX2- RX2+IN RX2+ DVI_5V RX4- RX4+ DVI_DDC2_SCL DVI_DDC2_SDA RX1-IN RX1- RX1+IN RX1+ REV:C D402 D403 D404 RX3- UDZS5.6B UDZS5.6B UDZS5.6B RX3+ RX0+IN RX0-IN RX0-IN RX1+IN RX0- RX0+IN RX1-IN RX0+ RX2+IN RX2-IN RX5- RX5+ RXC+IN RXC+ RXC-IN RXC- JACK D405 D406 BAV99...
  • Page 47 +3.3AVDD FB405 AVDD_PLL +3.3AVDD FB406 +3.3AVDD 120 OHM 120 OHM C425 C424 C426 22uF 16V 0.1uF 22uF 16V +3.3AVDD +3.3AVDD FB411 AVDD_ADC FB412 120 OHM 120 OHM C453 C454 C449 C452 22uF 16V 22uF 16V 0.1uF 0.1uF AVDD_ADC C455 22pF X401 14.31818MHz C457...
  • Page 48 +3.3V_SD FB413 +3.3V_MC +3.3V_MC +3.3V_SD 120 OHM C465 C464 0.1uF 22uF 16V FB414 +3.3V_MQ 120 OHM C477 22uF 16V 1M X 16bit =512K X 2Bank +3.3V_MQ +3.3V_MC MDATA15 MDATA14 +3.3V_MC MDATA13 MDATA12 MDATA11 R472 MDATA10 4K7 1/10W 5% MDATA9 MDATA8 REV:C DQM0 R474...
  • Page 49 VCPU R482 4K7 1/10W 5% 0R05 1/10W 5% NC CN403 U406 REV:C RESET RESET D427 C480 UDZS5.6B MAX810STRG CONN VCPU VCPU R506 R508 C487 4K7 1/10W 5% 4K7 1/10W 5% 0.22uF R507 4K7 1/10W 5% U408 R511 100R 1/10W 5% R514 100R 1/10W 5% MSCL...
  • Page 50 RXOIN3+ RXOIN3+ RXOIN3- RXOIN3- RXOCKIN+ RXOCKIN+ RXOCKIN- RXOCKIN- RXOIN2+ RXOIN2+ RXOIN2- RXOIN2- RXOIN1+ RXOIN1+ RXOIN1- RXOIN1- RXOIN0+ RXOIN0+ RXOIN0- RXOIN0- RXEIN3+ RXEIN3+ RXEIN3- RXEIN3- RXECKIN+ RXECKIN+ RXECKIN- RXECKIN- RXEIN2+ RXEIN2+ RXEIN2- RXEIN2- RXEIN1+ RXEIN1+ RXEIN1- RXEIN1- RXEIN0+ RXEIN0+ RXEIN0- RXEIN0- CN703 RXOIN0- RXO0-...
  • Page 51: Adapter Board

    Adapter board C930 2200pF C937 2200pF D909 US1M R942 VCC2 56K 1/8W IC903 NCP1377BDR2G R944 10R 1/8W GND Drv C931 R943 D910 LL4148 C932 47uF/50V R947 470R 1/8W R9461 R9462 C933   1/4W 220PF/25V C934 1000PF 50V R970 100Ω 1/4W R9105 R9106 R971...
  • Page 52 R901 680KΩ 1/4W BD901 L903 R902 120uH 12.0mH 680KΩ 1/4W L902 KBJ608G C911 C912 1uF/450V R903 680KΩ 1/4W R908 220KΩ 1/8W C904 C903 470pF/250V 470pF/250V R909 15KΩ 1/8W C902 0.22uF/275V C915 56pF L901 10.0mH R907 56KΩ 1/8W C916 C901 0.47uF/275V RV901 Varistor NR901...
  • Page 53 Inverter board OVP (Over Voltage Protation) Q801 R801 300K 1/10W RK7002 R803 120K 1/8W Q803 U801A RK7002 BA10393F R806 C806 R807 10K 1/10W 10NF 25V 20K 1/10W C808 R811 10NF 25V 34KOHM +-1% 1/10W OVPT 10K 1/8W 5% R818 R820 R819 10K 1/8W 1M 1/8W...
  • Page 54 PT801 PT802 PT803 X'FMR 564uH X'FMR 564uH X'FMR 564uH CN802 CONN PT809 PT810 PT811 X'FMR 564uH X'FMR 564uH X'FMR 564uH CN806 CONN C829 2U2 25V C831 2U2 25V C833 2U2 25V PT804 X'FMR 564uH X'FMR 564uH CN803 CONN PT812 X'FMR 564uH CN807 CONN C830 2U2 25V...
  • Page 55: Key Board

    Key board CN001 LBADC1 LBADC2 POWER_Key LED_BLUE# LED_RED# C001 CONN MENU LBADC1 VOL- (GND) VOL+ LBADC2 AUTO ECOLOR (GND) CN001 CONNECTOR ECOLOR AUTO MENU VOL- ZD001 UDZSNP5.6B add ZD001 and ZD002 for ESD solution LED001 LED ZD002 UDZSNP5.6B LED_BLUE# LED_RED# C002 C003 C004...
  • Page 56: Usb Board

    USB board U708 USB2514-AEZG Upstream R719 USBUP_DM VBUS0 100K 1/10W 5% VBUS_DET USBUP_DP C769 1uF/16V Dow nstream 1 USBDN1_DM OCS1 USBDN1_DP PRTPWR1 /OC1 Dow nstream 2 USBDN2_DM /OC2 OCS2 USBDN2_DP PRTPWR2 Dow nstream 3 USBDN3_DM /OC3 OCS3 USBDN3_DP PRTPWR3 Dow nstream 4 VCC3.3V USBDN4_DM /OC4...

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V243w