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Acer LCD MB243WABNS Service Manual

Acer flat panel television user manual
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ACER
ACER_LCD_G24_SM080519V1
Service
Model ID:MB243WABNS
Service Manual

Table of Contents

Important Safety Notice------------------------------------------------------------------------------------- 01
01. Product Specification--------------------------------------------------------------------------------- 02
02. OSD Menu-----------------------------------------------------------------------------------------------08
------------------------------------------------------------------------------------- 10
04. Assembly and Disassembly Procedures-----------------------------------------------------------12
05.
Troubleshooting----------------------------------------------------------------------------------------20
06. Firmware Upgrade Procedure------------------------------------------------------------------------31
07. Writing EDID Procedure-------------------------------------------------------------------------------33
08. Schematics and Layouts------------------------------------------------------------------------------ 35
Appendix I : User s Manual
'
Appendix II: Quick Setup Guide
Appendix II : Spare Parts List
Appendix IV: Software Pack
Safety Notice
Any person attempting to service this chassis must familarize with the chassis and be aware of the
necessary safety precautions to be used when serving electronic equipment
containing high voltage.
Published by LITE-ON Service Printed in Taiwan © All rights reserved Subject to modification
19th-May-2008

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Summary of Contents for Acer LCD MB243WABNS

  • Page 1: Table Of Contents

    ACER ACER_LCD_G24_SM080519V1 Service Model ID:MB243WABNS Service Manual Table of Contents Important Safety Notice------------------------------------------------------------------------------------- 01 01. Product Specification--------------------------------------------------------------------------------- 02 02. OSD Menu-----------------------------------------------------------------------------------------------08 03. Exploded Diagram ------------------------------------------------------------------------------------- 10 04. Assembly and Disassembly Procedures-----------------------------------------------------------12 Troubleshooting----------------------------------------------------------------------------------------20 06. Firmware Upgrade Procedure------------------------------------------------------------------------31 07. Writing EDID Procedure-------------------------------------------------------------------------------33 08.

  • Page 2: Important Safety Notice

    Important Safety Notice Using Lead-Free solder to well mounted the parts. ! The fusion point of Lead-Free solder requested in the degree of 220 C. ° ACER G24 Go to cover page...

  • Page 3: Product Specification

    ACER G24 Go to cover page 1.1 SCOPE This document defines the design and performance requirements for a 24W inch diagonal , flat panel monitor .The display element shall be a WUXGA (1920x1200) resolution TFT-LCD (Thin Film Transistor Liquid Crystal Display).16.7M color(RGB Hi+FRC) images are displayed...
  • Page 4 P C . ACER G24 Go to cover page The three video inputs consist of Red ,Green , and Blue signals, each with its own coaxial cable terminated at the monitor.
  • Page 5 ACER G24 Go to cover page 1.3.2.6 Abnormal Signal Immunity The monitor shall not be damaged by improper sync timing , pulse duration , or absence of sync , or abnormal input signal amplitude ( video and/ or sync too large or too small) , or any other anomalous...
  • Page 6 HDMI 67.433 59.940 148.352 DVI,HDMI ACER G24 Go to cover page The monitor shall include a controller capable of converting the analog RGB signal from a standard WUXGA resolution video controller in the CPU to a signal which can be displayed on the panel. The...
  • Page 7 ACER G24 Go to cover page Table 2 AC to DC Converter Requirements The operating range shall be from 90 to 132 and 195 to 265 AVC Input Voltage Range sinusoidal for all models specified. Input power frequency range sha;; be from 47.5 to 63 Hz over the Input Frequency Range specified input voltage range.
  • Page 8 1.5 Optical Characteristics Depends on the LCD supplier's spec. Details refer to QA Inspection Spec. ACER G24 Go to cover page When viewing the panel oriented so as to maximize reflected light , there shall be no visible smudging ,...

  • Page 9: Osd Menu

    ACER G24 2 OSD Menu Go to cover page 2.1 MAIN OSD MENU Outline: The description for control function:...
  • Page 10 2. OSD Manu (continued) ACER G24 Go to cover page...

  • Page 11: Exploded Diagram

    ACER G24 3. Exploded Diagram Go to cover page 3.1 Packing Exploded Diagram...
  • Page 12 ACER G24 3. Exploded Diagram (continued) Go to cover page 3.2 Product Exploded Diagram...

  • Page 13: Assembly And Disassembly Procedures

    ACER G24 Go to cover page 4.1 Assembly procedures: Connect the cable between power board(P802) and interface board (P301) Connect the function key cable into interface board(P303) Connect the cable between power board(P803)and inverter board (Cn001) Connect the FFC cable into interface board...
  • Page 14 CNOO1 Take lamp cables out from the holes shown as the photo. Plug 6 lamp cables to the connectors of inverter board. ACER G24 Go to cover page Plug in parallel direction Angel < 5 degrees...
  • Page 15 ACER G24 Go to cover page Use a Phillips-head screwdriver screwed the No.1~4 screws on both side and assemble the LCD panel and bracket chassis module. (No1~4 screw size=M3x6; Torque=2.5 KGFxCM). Use a Phillips-head screwdriver screwed the No.1~2 screws. (No1~2 screw size=M4x10;...
  • Page 16 PUT CABLE IN THIS POSITION Move previous assembled parts into the carton then stick Vista and feature label on the carton then packing the carton FEATURE LABEL VISTA LABEL ACER G24 Go to cover page PUT USER S MANUAL IN THIS POSITION...
  • Page 17 ACER G24 Go to cover page 4.2 Disassembly procedures Open the carton with a proper tool. FEATURE LABEL VISTA LABEL Take out all accessories including D-SUB cable power cable, DVI cables, user’s manual, and packing material from the carton. (Note: It depends on whether users returning the accessories.)
  • Page 18 Hold one side of down side that had been separated from front bezel Use properly force to pull up front bezel Unhook the key function board from front bezel, disconnect the key function cable ACER G24 Go to cover page...
  • Page 19 ACER G24 Go to cover page Use a Hex-head screwdriver unscrewed 5 screws to release the DVI ,D-SUB and HDMI connectors (No1~4Hex Nut screws Size=M3x8;Torque=6.5 0.5KGFxCM). (No.5 screw size=M3x8; Torque= Use a Phillips-head screwdriver unscrewed the No.1~2 screws to lease power plug (No1~2 screw size=M3x10;...
  • Page 20 Remove inverter shielding bracket Use a Phillips-head screwdriver unscrewed the No.1~4 screws (No1~4 screw size=M3x6; Torque=9~10KGFxCM). Remove the inverter board ACER G24 Go to cover page Use a Phillips-head screwdriver unscrewed the No.1~4 screws to release the interface board. (No1~4 screw size=M3x6; Torque=9~10KGFxCM).

  • Page 21: Troubleshooting

    ACER G24 Go to cover page 5.1 No display on the screen (Screen is black and colour of LED is amber.) Does OSM display upon pressing the “MENU” button? Check if the sync signal output from connected computer and the video cable is connected properly Proceed to “5.4 Abnormal Screen”...
  • Page 22 Failure Point I301, I302, I303, or I320 is damaged. Failure Point Printed wire is broke or short between P306, I314 ACER G24 Go to cover page Failure Point The cable is disconnected. Failure Point 1. Printed wire is broken between P301 pin1, pin2, pin3, pin4 and I301, I303, I320.
  • Page 23 ACER G24 Go to cover page 5.3 Check the backlight unit Check the BKLT_EN signal of rectangle input P301 pin11 at TTL high level. Check the PWM signal supplied from I314 pin251 is a PWM, pulse-width modulation. Failure Point Inverter of LCD module is defected.
  • Page 24 I314 pin45. 2. R391 is short. max. 3. C356 is open. 4. R390 is open. 1. The I314 is defected. 2. Printed wire is broken between I314 and P306. ACER G24 Go to cover page Failure Point Failure Point Failure Point...
  • Page 25 ACER G24 5. Troubleshooting (continued) Go to cover page 5.5 Abnormal OSM display - OSD Adjusment Problem Failure Point Check the input TTL level 1. Printed wire is broken between P303 pin 2 and I306 pin 87. whether if it was altered upon 2.
  • Page 26 6. The input source cable is defected. 7. Check I313 pin5 signal whether if correct. 5. Troubleshooting (continued) TTL level Failure Point TTL level Failure Point ACER G24 Go to cover page Failure Point I312 is defected Failure Point I313 is defected...
  • Page 27 ACER G24 Go to cover page 5.7 Checking the interface circuit of sync signal 5.7.1 Checking the control circuit of horizontal sync pulse Check the horizontal sync signal on I314 pin46 Proceed to “5.8 Checking the resolution change IC movement”...
  • Page 28 I314, pin36 Check the output of 3.3V “H” pulse from I306 pin12 Failure Point Print wire is broken between I306 pin12 and I314 pin9. ACER G24 Go to cover page Failure Point X302 is defected. Failure Point I306 is defected.
  • Page 29 ACER G24 Go to cover page 5.9 Checking the DC/DC converter circuit Check if the 5V is output from P301 pin1, pin2, pin3, pin4 to I301, I303, I320 pin3. Check if the 3.3V, 2.5V and 1.8V line voltage is output...
  • Page 30 Check I101 and repair if damage Repair 101 Check D102, D103, D107, D108, D114, D115, D112, D113 and repair if damage. Check Q104, Q105, Q106, Q107, Q108 and repair them if damage Check T101 and T102 if damage ACER G24 Go to cover page...
  • Page 31 ACER G24 Go to cover page 5.11 HDMI signal check 5.11.1 No video Check the TMDS signal from computer input on HDMI connector Check the TMDS signal of Failure Point I314 was damaged 5. Troubleshooting (continued) 1.Check the host PC to see if there’s no TMDS signal output 2.HDMI cabled disconnected.

  • Page 32: Firmware Upgrade Procedure

    There s a Dialog window shown on the screen. It is the meaning of connection successful . Check the video cable and ISP board (D-sub to Printer port) between LCD monitor to PC host to see if it disconnected. ACER G24 Go to cover page...
  • Page 33 ACER G24 Go to cover page Press [Device] button to select the WP pin pull to high “ during ISP “ Press [Read] button. 1. Press Read folder to browse firmware image. 2.The position according to where the firmware be put Press [Auto] button 6.

  • Page 34: Writing Edid Procedure

    .Please See below photo 7. Writing EDID Process 2. Writing VGA/DVI Process Chose the folder:”Acer-VGA&DVI” then double click Select the “Acer-M1&M3-XPEDID-DVI-.exe” to execute it SOCKET 3.Select Model: Key in password”cedid” then select model...
  • Page 35 6. When EDID was written successfully that will show below message on the screen 7. Writing EDID Process (continued) Writing HDMI Process Chose the folder:”Acer-HDMI” then double click Select the “acer HDMI.EXE” to execute it According to the previous process(step3-step6) to write HDMI-EDID.

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