1. Manuals
  2. Brands
  3. AOC Manuals
  4. Monitor
  5. CM-736
  6. Service manual

AOC CM-736 Service Manual

17” micro controlled color monitor
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
SERVICE MANUAL
CM-736
17" MICRO CONTROLLED
COLOR MONITOR

Advertisement

Table of Contents
loading

Related Manuals for AOC CM-736

Summary of Contents for AOC CM-736

  • Page 1 SERVICE MANUAL CM-736 17” MICRO CONTROLLED COLOR MONITOR...
  • Page 2 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. - 1 -...

  • Page 3: Table Of Contents

    1. SPECIFICATIONS FOR CM-736 COLOR MONITOR ........

  • Page 4: Specifications For Cm-736 Color Monitor

    1. SPECIFICATIONS FOR CM-736 COLOR MONITOR CRT: Size: 17-inch Diagonal F lat Square Type Dot Pitch: 0.26mm/0.28mm Screen: Non-Glare Screen; anti-static; VLMF (OPTION) Deflection: 90” Degree DISPLAY: Size: (300± 10)mm X (225± 15)mm; External Adjustable Unlimitted Color (Depend on Interface Card and Software Pro-...

  • Page 5: Precaution And Notices

    2. PRECAUTIONS AND NOTICES SAFETY PRECAUTIONS 1. Observe all caution and safety related notes located inside the display cabinet. 2. Operation of the display with the cover removed, may cause a serious, shock hazard from display power supply. Work on the display should not be attempted by anyone who is not thoroughly familiar with precautions necessary when working on high voltage equipment.

  • Page 6: Service Notes

    2 - 3 S E R V I C E N O T E S 1. When replacing parts or circuit boards, clamp the lead wires around terminals before soldering. 2. When replacing a high wattage resistor (more than 1W of metal oxide film resistor) in circuit board, keep the resistor about 5mm away from circuit board.

  • Page 7: Operation

    3. OPERATION 3 - l OPERATION INSTRUCTIONS Follow these step-by-step instructions for proper monitor installation. 1. Be sure that the power switch is in the “Off” position before plugging in the power cord and applying any AC power. RGB A N A L O G I N P U T I N P U T L E V E L...

  • Page 8: D-Sub/Bn C Connector

    3 - 2 D - S U B / B N C C O N N E C T O R A. D-SUB 15 PIN CONNECTOR 11 GND 12 NC 13 H.SYNC 5 2 3 4 1 GND G B NC 10 7 8 9 6 GND GND GND GND NC 14 V.SYNC 15 NC...

  • Page 9: Timing Diagram & Table

    4. TIMING D I A G R A M & T A B L E 4 - l E x t e r n a l c o n t r o l SYMBOL ITEM DESCRIPTION 1 POWER SWITCH - CONTROLS ON/OFF POWER TO THE MONITOR 2 ON/OFF INDICATOR - LED (WHEN LIT) GIVES VISUAL...
  • Page 10 TIMING TABLE H-SYNC V-SYNC HORL MODE TIMING A (µS) B (µS) C (µS) D (µS) E (mS) F (mS) G (mS) H (mS) POLARITY POLARITY FREQUENCY VGA 350 3 1 . 9 1 6 25.42 3 . 8 1 3 1.765 14.33 11.171 0 .

  • Page 11: Adjustment

    5. ADJUSTMENT 5 - l ADJUSTMENT CONDITIONS AND PRECAUTIONS 1. Approximately 30 minutes should be allowed for warm up before proceeding. 2. Adjustments should be undertaken only on those necessary elements since most of them have been carefully preset at the factory. 5 - 2 MAIN ADJUSTMENTS FUNCTION...

  • Page 12: External Controlled Function

    EXTERNAL CONTROLLED FUNCTION ITEM DESCRIPTION POWER SWITCH - CONTROLS ON/OFF POWER TO THE MONITOR. ON/OFF INDICATOR - LED (WHEN LIT) GIVES VISUAL CONFIRMATION OF POWER ON. CONTRAST - ADJUSTS THE CHROMA CONTRAST (INTENSITY) OF THE PICTURE. BRIGHTNESS - A D J U S T S T H E ILLUMINANCE OF THE PICTURE. H-CENTER - ADJUSTS THE H-PHASE (HORIZONTAL PLACEMENT) OF THE PICTURE.
  • Page 13 2. Interior General Adjustment: Conditions: (a) Set timing in Mode 14 (75K) (b) H-size VR be set in Max. position; brightness and contrast VR be set in Min. position. Fail safe (TP804 - GND voltage) adjust VR805 to be 9.3 VDC. H F/V reference voltage (TP803 - GND voltage) adjust VR801 to be 12.5 VDC.
  • Page 14 6. Vertical Linearity Adjustment. Conditions: (a) Set timing in Mode 12 (57K) (b) Set the image in crosshatch pattern. (1) Vertical Linearity. adjust VR602 to make the top and botton cell are equal in vertical height, 7. Adjustment of White Balance Following the under processores: Make sure the VR401-402-403-404-405-406 are all in the middle position.

  • Page 15: Pcb Layout

    6. PCB LAYOUT 6 - l MAIN PCB LAYOUT...

  • Page 16: Crt Pcb Layout

    6 - 2 CRT PCB LAYOUT 6-3 SMPS PCB LAYOUT...

  • Page 17: Signal Pc B Layout

    6 - 4 S I G N A L PCB L A Y O U T -16-...

  • Page 18: B L O C K Diagram (Video Vert & Hori )

    r r r -17-...

  • Page 19: Block Diagram (Smps)

    CM-736 BLOCK DIAGRAM (SMPS) +130V +75V OUTPUTS _ +27V RECTIFIED --) ? +15V & SMOOTHED +7.5V RECTIFIED SMOOTHED POWER -22v & TRANSFORMER OUTPUTS RECTIFIED SMOOTHED T951 +70~150v VARIABLE VARIABLE TRANSFORMER 1 Q901 & Q913 (31K~64K) POWER MOS Q951 R970 POWER MOS...

  • Page 20: Trouble Shooting G

    8. TROUBLE SHOOTING NO RASTER 8 - l CHECK B+ THE CN951 PIN 1 VOLTAGE SHALL BE 65V AT MODE 3 SIGNAL 27V LINE JUDGE PECULIAR NOISE OF HIGH VOLTAGE CHECK H.V GENERATED AT POWER SW. ON,OR STATIC OPEARATION CHECK H.OSC H.DEF HV.CIRCUIT CHECK...

  • Page 21: A B N O R M A L V I D E O O N C R T S C R E E

    8-2 ABNORMAL VIDEO ON CRT SCREEN CHECK BOV6135V LINE SCREEN VOLTAGE ABNORMAL WHITE BALANCE 8 - 3 ABNORMAL WHITE BALANCE READJUST WHITE BALANCE OR ASSOCIATED OR ASSOCIATED CIRCUIT FAILURE CIRCUIT FAILURE...

  • Page 22: Blanking Work

    8-4 NO BLANKING WORK NO BLANKING WORK Q703 (ON CRT BOARD) Q702 H.OSC/DEF/HV CIRCUIT FAULT 8 - 5 THE HIGH VOLTAGE PROTECTOR CHECK HV.PROTECTOR CIRCUIT MAKES AN AUDIBLE OPERATION NOISE DURING OPERATION VR805 0804 ZD804 SEE ITEM 8 MEASURE ON THE MAIN BOARD POINT 0802 AND 0803 BASE AND ASSOCIATED CIRCUIT FAILURE...

This manual is also suitable for:

M621

Table of Contents