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Acer NA23WABAS Service Manual
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Acer NA23WABAS Service Manual

Acer NA23WABAS Service Manual

Dbg dpbu ii
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ACER
DBG DPBU II
DBG DPBU II
Service
Service Manual

Table of Contents

Important Safety Notice------------------------------------------------------------------------------------- 01
01. Product Specification--------------------------------------------------------------------------------- 02
02. OSD Menu-----------------------------------------------------------------------------------------------14
04. Assembly and Disassembly Procedures-----------------------------------------------------------20
05.
Troubleshooting----------------------------------------------------------------------------------------27
06. Firmware Upgrade Procedure------------------------------------------------------------------------51
07. Writing EDID Procedure-------------------------------------------------------------------------------53
08. Block Diagram and schematic----------------------------------------------------------------------- 56
Appendix I : User s Manual
Appendix II: User's QSG
Appendix III : Spare Parts List
Appendix IV: Software Pack
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
Published by Wistron Corporation
------------------------------------------------------------------------------------- 18
'
Safety Notice
Printed in Taiwan ©
18th-Nov.-2008
ACER_LCD_V233H_SM081118V1
Model ID:
high voltage.
All rights reserved
NA23WABAS
Subject to modification

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  • Page 1: Table Of Contents

    ACER ACER_LCD_V233H_SM081118V1 Model ID: NA23WABAS DBG DPBU II DBG DPBU II Service Service Manual Table of Contents Important Safety Notice------------------------------------------------------------------------------------- 01 01. Product Specification--------------------------------------------------------------------------------- 02 02. OSD Menu-----------------------------------------------------------------------------------------------14 03. Exploded Diagram ------------------------------------------------------------------------------------- 18 04. Assembly and Disassembly Procedures-----------------------------------------------------------20 Troubleshooting----------------------------------------------------------------------------------------27 06. Firmware Upgrade Procedure------------------------------------------------------------------------51 07.

  • Page 2: Important Safety Notice

    Important Safety Notice ACER V233H Go to cover page Product Announcement: This product is certificated to meet RoHS Directive and Using Lead-Free solder to well mounted the parts. ! The fusion point of Lead-Free solder requested in the Lead-Free produced definition. Using approved critical components only is recommended when the situation degree of 220 C.

  • Page 3: Product Specification

    ACER V233H 1. Product Specification Go to cover page The LCD monitor consists of an interface board, a power board This model combine with two platform. See below and inverter board, a function key board. explanation. The interface board will house the flat panel control 1.Scaler IC:NT68627U used in VGA port.
  • Page 4 ACER V233H 1. Product Specification (continued) Go to cover page C o nne c to r P in D e s c riptio n 1.3.2.2 Video Signal Termination Impedance D -S U B Pin D e s criptio n N a me...
  • Page 5 ACER V233H 1. Product Specification (continued) Go to cover page 1.3.4 Monitor Modes and Timing Capability 1.3.3 User Controls and Indicators 1.3.4.1 Format and Timing 1.3.3.1 Power On / Off Switch The monitor shall synchronize with any vertical The monitor shall have a power control switch frequency from 55 to 61 Hz , and with any visible and accessible on the front of the monitor .
  • Page 6 ACER V233H 1. Product Specification (continued) Go to cover page 1.3.5 Controller Requirements PRESET PC TIMINGS (ANALOG AND DIGITAL 1.3.5.1 General Requirements INPUTS) (For 2048x1152 LTM230TT01 projects) The monitor shall include a controller capable of H-Sync V-sync Band Width Polarity...
  • Page 7 ACER V233H 1. Product Specification (continued) Go to cover page 1.4.2. Panel Timings The controller included with the monitor shall translate all video timings from the CPU that meet the timing requirements listed in Panel specification into timings appropriate for the panel. Under no circumstances may the controller supply the panel with timings that may result in damage .
  • Page 8 ACER V233H 1. Product Specification (continued) Go to cover page 1.4.5.7 Other Defects 1.4.5.2 Display Degradation Undefined defects that are considered to be Over the life of the product , variation of the parameters rejectable by Wistron will be reviewed by Wistrin as specified in Panel specification shall be maintained they become apparent.
  • Page 9 ACER V233H 1. Product Specification (continued) Go to cover page The LCD monitor consists of an interface board, a power board 1A1D1H product specification: and inverter board, a function key board. 1.1 SCOPE The interface board will house the flat panel control...
  • Page 10 ACER V233H 1. Product Specification (continued) Go to cover page C o n n e c t o r P in D e s c r ip t io n 1.3.2.2 Video Signal Termination Impedance D - S U B P in D e s c rip t io n...
  • Page 11 ACER V233H 1. Product Specification (continued) Go to cover page 1.3.4 Monitor Modes and Timing Capability 1.3.3 User Controls and Indicators 1.3.4.1 Format and Timing 1.3.3.1 Power On / Off Switch The monitor shall synchronize with any vertical The monitor shall have a power control switch frequency from 50 to 75 Hz , and with any visible and accessible on the front of the monitor .
  • Page 12 ACER V233H 1. Product Specification (continued) Go to cover page PRESET PC TIMINGS (ANALOG AND DIGITAL 1.3.5.3 Panel Timing and Interface INPUTS) The controller supplied with the monitor shall H-Sync V-sync Band Width Polarity Item Resolution Source (kHz) (Hz) (MHz) control all panel timing.
  • Page 13 ACER V233H 1. Product Specification (continued) Go to cover page 1.3.8 Display Communications Channel 1.4.4.Backlight Requirements The monitor assembly shall provide a display 1.4.4.1 General Requirements communications channel that conforms to VESA The backlight assembly shall be designed to DDC2Bi hardware requirements. This configuration...
  • Page 14 ACER V233H 1. Product Specification (continued) Go to cover page 1.4.5.4 Allowable Defects Average Diameter smaller of Acceptable Number Minimum Separation (L+W)/2 or L/20+2W No cosmetic defects are allowed except those specified < 0.1mm Non countable N / A below. The conditions of visual inspections are as 0.1 mm ~ 0.3 mm...

  • Page 15: Osd Menu

    ACER V233H 2. OSD Manu Go to cover page MAIN OSD MENU(1A and 1A1D) Outline: The description for control function:...
  • Page 16 2. OSD Manu (continued) ACER V233H Go to cover page...
  • Page 17 ACER V233H 2. OSD Manu (continued) Go to cover page MAIN OSD MENU(1A1D1H) Outline: The description for control function:...
  • Page 18 2. OSD Manu (continued) ACER V233H Go to cover page Appendix * Multiple Language...

  • Page 19: Exploded Diagram

    ACER V233H 3. Exploded Diagram Go to cover page 3.1 Packing Exploded Diagram...
  • Page 20 ACER V233H 3. Exploded Diagram (continued) Go to cover page 3.2 Product Exploded Diagram...

  • Page 21: Assembly And Disassembly Procedures

    ACER V233H 4. Assembly and Disassembly Procedures Go to cover page 4.1 Assembly procedures: Fix the speaker and speaker cable, The white line Connect the cable between power board(P802) in the left ,the red line in the right. and interface board (P301)
  • Page 22 ACER V233H 4. Assembly and Disassembly Procedures (continued) Go to cover page Plug 2 lamp cables to the connectors of inverter Take a key function board to hook with front board. bezel and Use a Phillips-head screwdriver screw 2 screws.
  • Page 23 ACER V233H 4. Assembly and Disassembly Procedures (continued) Go to cover page Put accessories of stand, DVI cable, and Stick a screen card on the front bezel with two user’s manual ,power cable on specific tapes. positions as photo below.
  • Page 24 ACER V233H 4. Assembly and Disassembly Procedures (continued) Go to cover page 4.2 Disassembly procedures ut returned unit on a protective cushion,then Open the carton with a proper tool. remove LDPE+EPE bag. Tear off tapes to remove the screen protector...
  • Page 25 ACER V233H 4. Assembly and Disassembly Procedures (continued) Go to cover page Put the dissembled monitor closed to by myself Separating all of the locking mechanism of the front bezel in turn. RIGHT SIDE LEFT SIDE Turn over the LCD monitor (screen faced up).
  • Page 26 ACER V233H 4. Assembly and Disassembly Procedures (continued) Go to cover page Hold one side of down side that had been Use a Phillips-head screwdriver unscrewed the separated from front bezel No.1~2 screws to release the power connector. Use properly force to pull up front bezel (No1~2 screw size=M3x10;...
  • Page 27 ACER V233H 4. Assembly and Disassembly Procedures (continued) Go to cover page Use a Phillips-head screwdriver unscrewed the Use long nose pliers to separate plastic hook No.1~2 screws to release the interface board. (No1~2 screw size=M3x6; Torque=9~10KGFxCM). Use a Phillips-head screwdriver unscrewed the No.1screws to release the shield cover of iron.

  • Page 28: Troubleshooting

    5. Troubleshooting ACER V233H Go to cover page 1A and 1A1D 5.1 No display of screen Screen is black color of LED is amber Does OSM display when you push “MENU key. Proceed "No OSM display" section. When a signal isn't being inputted, it is indicated with "No Signal Input".
  • Page 29 ACER V233H 5. Troubleshooting (continued) Go to cover page 5.2 Nothing display on screen (screen is black, color of LED is blue) Is backlight lit? Refer "Checking the backlight unit" section" Check the video cable for failure. Check the host for output signal is all Does computer output RGB video signals? black or not.
  • Page 30 ACER V233H 5. Troubleshooting (continued) Go to cover page 5.2 Nothing display on screen (screen is black, color of LED is blue)continued Continue Check the 5V power supply for P301 pin 4,5,6. Check the I302 pin2 if Proceed "Checking the DC/DC converter voltage is 3.3V...
  • Page 31 ACER V233H 5. Troubleshooting (continued) Go to cover page 5.3 Checking the back light unit Is +22V supplied to inverter PWB ? (by the power board) Failure Point 1) Power board of Inverter part failure. Check the BKLT_EN signal of the DC input P301 pin 2 at TTL high level.
  • Page 32 ACER V233H 5. Troubleshooting (continued) Go to cover page 5.4 Abnormal screen for VGA Check the R, G, B video signal from computer input on P302 of D-sub connector. Failure Point 1) No R, G, B video signals output from host computer, check computer.
  • Page 33 ACER V233H 5. Troubleshooting (continued) Go to cover page 5.5 Abnormal screen for DVI (This page for 1A1D used) Check the DVI video signal from computer input on P303 of DVI connector. Failure Point 1) No DVI video signals output from host computer, check computer.
  • Page 34 ACER V233H 5. Troubleshooting (continued) Go to cover page 5.6 Abnormal OSM display adjust problem Check the input TTL level whether is changed when pressed function keys on the P306 pin4, 5 (normal is high level, when push button, generated low level) Failure Point 1) Function key wire disconnection.
  • Page 35 ACER V233H 5. Troubleshooting (continued) Go to cover page 5.7 Abnormal plug and play operation for VGA Confirm the host computer supplies DDC2B mode. Failure Point The host machine is not communicatiog in DDC2B mode. Check the voltage on P302 pin9 that is power DC 5 V.
  • Page 36 ACER V233H 5. Troubleshooting (continued) Go to cover page 5.8 Abnormal plug and play operation for DVI (This page for 1A1D used) Confirm the host computer supplies DDC2B mode. Failure Point The host machine is not communicating in DDC2B mode.
  • Page 37 ACER V233H 5. Troubleshooting (continued) Go to cover page 5.9 Checking the interface circuit of sync signa 5.9.1 Checking the control circuit of horizontal sync pulse Check the horizontal sync signal on P302 pin13 TTL level. Failure Point Video cable is failure.
  • Page 38 ACER V233H 5. Troubleshooting (continued) Go to cover page 5.10 Checking the resolution change IC movement Check +3.3V supply on I302 pin2. Proceed " Checking the DC/DC converter circuit" section. Check +1.8V supply on I310 pin 2. Proceed " Checking the DC/DC converter circuit" section.
  • Page 39 ACER V233H 5. Troubleshooting (continued) Go to cover page 5.11 Checking the DC/DC converter circuit Check the 5V is output from P301 pin 4,5,6. Failure Point 1) Power wire disconnection. 2) Power board is failure. Check the 5V is input to I302 pin3.
  • Page 40 ACER V233H 5. Troubleshooting (continued) Go to cover page 1A1D1H 5.1 No display of screen Screen is black color of LED is amber Does OSM display when you push “MENU key. Proceed "No OSM display" section. When a signal isn't being inputted, it is indicated with "No Signal Input".
  • Page 41 ACER V233H 5. Troubleshooting (continued) Go to cover page 5.2 Nothing display on screen (screen is black, color of LED is blue) Is backlight lit? Refer "Checking the backlight unit" section" Check the video cable for failure. Check the host for output signal is all Does computer output RGB video signals? black or not.
  • Page 42 ACER V233H 5. Troubleshooting (continued) Go to cover page 5.2 Nothing display on screen (screen is black, color of LED is blue)continued Continue Check the 5V power supply for P301 pin 4,5,6. Check the I301 pin2 if Proceed "Checking the DC/DC converter voltage is 3.3V...
  • Page 43 ACER V233H 5. Troubleshooting (continued) Go to cover page 5.3 Checking the back light unit Is +22V supplied to inverter PWB ? (by the power board) Failure Point 1) Power board of Inverter part failure. Check the BKLT_EN signal of the DC input P301 pin 2 at TTL high level.
  • Page 44 ACER V233H 5. Troubleshooting (continued) Go to cover page 5.4 Abnormal screen for VGA Check the R, G, B video signal from computer input on P303 of D-sub connector. Failure Point 1) No R, G, B video signals output from host computer, check computer.
  • Page 45 ACER V233H 5. Troubleshooting (continued) Go to cover page 5.5 Abnormal screen (For DVI and the same for HDMI) Check the DVI video signal from computer input on P304 of DVI connector. Failure Point 1) No DVI video signals output from host computer, check computer.
  • Page 46 ACER V233H 5. Troubleshooting (continued) Go to cover page 5.6 Abnormal OSM display adjust problem Check the input TTL level whether is changed when pressed function keys on the P308 pin4, 5 (normal is high level, when push button, generated low level) Failure Point 1) Function key wire disconnection.
  • Page 47 ACER V233H 5. Troubleshooting (continued) Go to cover page 5.7 Abnormal plug and play operation for VGA Confirm the host computer supplies DDC2B mode. Failure Point The host machine is not communicatiog in DDC2B mode. Check the voltage on P303 pin9 that is power DC 5 V.
  • Page 48 ACER V233H 5. Troubleshooting (continued) Go to cover page 5.8 Abnormal plug and play operation (For DVI and the same for HDMI) Confirm the host computersupplies DDC2B mode. Failure Point The host machine is not communicatiog in DDC2B mode. Check the voltage on P304 pin14 that is power DC 5 V.
  • Page 49 ACER V233H 5. Troubleshooting (continued) Go to cover page 5.9 Checking the interface circuit of sync signal 5.9.1 Checking the control circuit of horizontal sync pulse Check the horizontal sync signal on P303 pin13 TTL level. Failure Point Video cable is failure.
  • Page 50 ACER V233H 5. Troubleshooting (continued) Go to cover page 5.10 Checking the resolution change IC movement Check +3.3V supply on I301 pin2. Proceed " Checking the DC/DC converter circuit" section. Check +1.2V supply on I305 pin 2. Proceed " Checking the DC/DC converter circuit" section.
  • Page 51 ACER V233H 5. Troubleshooting (continued) Go to cover page 5.11 Checking the DC/DC converter circuit Check the 5V is output from P301 pin 4,5,6. Failure Point 1) Power wire disconnection. 2) Power board is failure. Check the 5V is input to I301 pin3.

  • Page 52: Firmware Upgrade Procedure

    ACER V233H 6. Firmware Upgrade Process Go to cover page For 1A,1A1D and 1A1D1H used S4 Press ISP ON -> check the connection from PC to monitor, please keep monitor power ON. 6.1 Hardware Configuration(For Usb port kit) Note: It must be good connection between PC and Note: The SW3 should be pushed down When you monitor, and then you can press ISP ON and ISP OFF.
  • Page 53 ACER V233H 6. Firmware Upgrade Process (continued) Go to cover page S8 Press Auto to update F/W, the monitor will auto reset system after F/W completely load. S9 Check firmware version Turn off the power,then press force on “ POWER ” and “ E ”...

  • Page 54: Writing Edid Procedure

    Go to cover page Writing EDID for VGA (1A) Hardware Configuration: S1 Chose the folder:” Acer-V233H-edid-VGA “ 1. Take the printer connector(maile) of a DDC multi-cable Double click “ AcerEDID-Ana_only.EXE “ plugged into the printer socket (female) of a desktop PC or laptop as ‘1 PRINTER’.
  • Page 55 VGA CONNECTION Entering Factory mole to let “EDID WP” be off Writing EDID procedure for 1A1D S1 Choose the folder “ACER-VGA&DVI-DDC” Double click “ AcerDigedid.exe “ The writing process same as writing 1A process.(from S2 to S5) S5 When EDID was written successfully that will show below...
  • Page 56 Writing EDID procedure for 1A1D1H Writing EDID procedure for 1A1D1H S1 Choose the folder “ACER-HDMI -DDC” S1 Choose the folder “ACER-VGA&DVI-DDC” Double click “ Acer 24-HDMI “ Double click “ AcerDigedid “ The writing process same as writing 1A process.

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