Service Manuals, User Guides, Schematic Diagrams or docs for : AOC Monitor LM923 AOC+LM923

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AOC+LM923


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                                                                             AOC LM923




         SERVICE MANUAL

                 19" LCD MONITOR

                                  LM923



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  THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY. EVERY REASONABLE EFFORT HAS
BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL; WE CANNOT GUARANTEE THE ACCURACY OF
THIS INFORMATION AFTER THE DATE OF PUBLICATION AND DISCLAIMS RELIABILITY FOR CHANGES,
ERRORS OR OMISSIONS.




                                         Page 1 of 55
                                                                                                                           AOC LM923
                                                          Table of Content
Revision List.........................................................................................................................   3
1. Monitor Specifications........................................................................................................        4
2. LCD Monitor Description.....................................................................................................          5
3. Operating Instructions........................................................................................................        6
  3.1 General Instructions.........................................................................................................      6
  3.2 Control Buttons...............................................................................................................     6
  3.3 Adjusting the Picture........................................................................................................      7
4. Input/Output Specification...................................................................................................         9
  4.1 Input Signal Connector.....................................................................................................        9
  4.2 Factory Preset Display Modes............................................................................................           10
  4.3 Power Supply Requirements.............................................................................................             10




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  4.4 Panel Specification..........................................................................................................      11




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     4.4.1Display Characteristics.............................................................................................           11
     4.4.2Optical Characteristics................................................................................................        11




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     4.4.3 Parameter Guide Line For CCFL Inverter........................................................................                12

5. Block Diagram...................................................................................................................      13
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  5.1 Monitor Exploded View.....................................................................................................         13
  5.2 Software Flow Chart.........................................................................................................       14
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  5.3 Electrical Block Diagram...................................................................................................        16
     5.3.1 Main Board...............................................................................................................     16
     5.3.2 Inverter/Power Board..................................................................................................        17
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6. Schematic.........................................................................................................................    18
  6.1 Main Board....................................................................................................................     18
  6.2 Audio Board..................................................................................................................      24
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  6.3 Power Board..................................................................................................................      25
7. PCB Layout......................................................................................................................      28
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  7.1 Main Board....................................................................................................................     28
  7.2 Audio Board...................................................................................................................     29
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  7.3 Power Board..................................................................................................................      30
  7.4 Key Board.....................................................................................................................     30
8. Maintainability...................................................................................................................    31
  8.1 Equipments and Tools Requirement....................................................................................               31
  8.2 Trouble Shooting.............................................................................................................      32
     8.2.1 Main Board...............................................................................................................     32
     8.2.2 Power /Inverter/Board.................................................................................................        35
     8.2.3 Keypad Board...........................................................................................................       37
9. White-Balance, Luminance adjustment...............................................................................                    38
10. EDID Content...................................................................................................................      39
11. BOM List........................................................................................................................     40

                                                              Page 2 of 55
                                                                    AOC LM923

                               REVISION LIST
Revision     Date       Revision History              TPV Model
  A00      Nov-28-05   First Version Release        T980KAXHLFMRA




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                                    Page 3 of 55
                                                                                            AOC LM923
1.MONITOR SPECIFICATIONS

         ITEMS                                      SPECIFICATIONS

                             Driving system                                TFT LCD

                                  Size                                   48.0cm(19.0")

                                 Type                                     M190EN02
       LCD Panel
                               Pixel pitch                      0.294mm( H )x 0.294mm( V )

                            Viewable angle                             170



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