Service Manuals, User Guides, Schematic Diagrams or docs for : AOC Monitor CM-336_337

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CM-336_337


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                 SERVICE MANUAL

                 CM-336
                 CM-337
       COLOR VIDEO MONITOR




M618
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 LIABILITY FOR CHANGES, ERRORS, OR OMISSIONS.




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                                                                TABLE OF CONTENTS

                                                                                                                                                            PAGE
  1.   SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .          3

 2.    PRECAUTION AND NOTICES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                        4
       2-l        SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                   4
       2-2        PRODUCT SAFETY NOTICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                        4
       2-3        SERVICE NOTES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .             5
       2-4        HIGH VOLTAGE WARNING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                         5

 3.    OPERATING              INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .           6

 4.    TIMING DIAGRAM & TABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                        7

 5.    ADJUSTMENT                ..................................................................                                                            8
       5-l        ADJUSTMENT CONDITIONS AND PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                              8
       5-2        MAIN CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .              8
       5-3        ADJUSTING THE FRONT CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                                   8
       5-4        ALIGNMENT PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                        9

 6.    PCB L A Y O U T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

       6-l        MAIN PCB LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .               14
       6-2        VIDEO PCB LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                15

 7.    BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .            16

 8.    TROUBLE SHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

       B-l        NO RASTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
       B-2        ABNORMAL VIDEO ON CRT SCREEN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                            19
       B-3        ABNORMAL WHITE BALANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                    19
       B-4        NO BLANKING WORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .            20
       B-5        H. OSC/DEF/HV CIRCUIT FAULT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                     20
       B-6        F/V CONVERTER AND ASSOCIATED CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
       B-7        UNSTABLE SYNCHRONIZATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                      21
       B-B        POWER SUPPLY TROUBLE SHOOTING CHART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

 9.    MECHANICAL               DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .           23

10.    LOCATION OF ADJUSTMENT VR (VARIABLE RESISTOR) OF P.C.B. . . . . . . . . . . . . . . . . . .                                                            25

11.    PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .     26

12.    SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .                  40



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                          1. SPECIFICATIONS FOR CM-336/337 COLOR MONITOR


 1.   CRT:
      14" (13V) Deflection, 29mm Neck, 0.28mm Dot Pitch, Non-Glare Screen

2.    Display Color:
      Unlimited Colors

3.    External Controls:
      Power On/Off, Contrast, Brightness, H-Center, H-Size, V-Center, V-Size

4.    Input Video Signal

                        Model 1        Model 2       Model 3       Model 4     Model 5       Model 6

                        RGB Analog RGB Analog RGB Analog RGB Analog RGB Analog               RGB Analog

      Horiz. Sync. TTL Level          TTL Level      TTL Level     TTL Level   TTL Level     TTL Level
                   Positive           Negative       Negative      Negative    Positive      Negative

      Vert Sync. TTL Level            TTL Level      TTL Level     TTL Level   T T L Level   TTL Level
                  Negative            Positive       Negative      Negative    Positive      Negative

 5.   Resolution
      Horizontal: 720(H)               720(H)        640(H)        800(H)      1024(H)       1024(H)
        Vertical: 350(H)               400(H)        480(H)        600(H)       768(H)        768(H)

 6.   Display Size (H-size & V-size set to center position)
      Horizontal:       247 



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