SERVICE GUIDE COLOR MONITOR (AF715 Series) 41AB793Z-ACER-A00 P/N : B793Z-01-A Date: Mar-18-03 Ver : A00...
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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 LIABILITY FOR CHANGES, ERRORS OR OMISSIONS, MANUFACTURE DATE : Mar.
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 the 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.
HIGH VOLTAGE WARNING Operation of monitor outside of cabinet or with back removed may cause a serious shock hazard. Work on this model should only be performed by those who are thoroughly familiar with precautions necessary when working on high voltage equipment.
3. OPERATING INSTRUCTIONS This procedure gives you instructions for installing and using the 7K color display. Position the display on the desired operation and plug the power cord into a convenient AC outlet. Three-wire power cord must be shielded and is provided as a safety precaution as it connects the chassis and cabinet to the electrical conduit ground.
4. ADJUSTMENT 4-1 ADJUSTMENT CONDITIONS AND PRECAUTIONS Approximately 30 minutes should be allowed for warm up before proceeding. Adjustments should be undertaken only on those necessary elements since most of them have been carefully preset at the factory. 4-2 MAIN ADJUSTMENTS FUNCTION LOCATION DESIGNATION...
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F H :6 8 .7 K H z F V :8 5 .0 H z 9 3 0 0 6 5 0 0 G B CONTRAST H-MOIRE REDUCE BRIGHTNESS V-MOIRE REDUCE(No use) H-CENTER R-GAIN H-SIZE G-GAIN V-CENTER B-GAIN V-SIZE...
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3. White Balance, Luminance adjustment: A. Bias (Low Luminance) adjustment: (a) Set mode 5 1024×768 Fh: 68.6KHz full white pattern. (b) To make the adjustment condition is under the Factory preset window. Same as step 2-C. (c) Warm up more than 30 minutes. (d) Brightness set to center.
RELATIVE PLACEMENT OF TYPICAL COMPONENTS Purity Magnets 6-pole Convergence Magnets 4-pole Convergence Magnets Deflection Yoke 6. Convergence adjustment A. Produce a magenta crosshatch on the display. B. Adjust the focus for the best overall focus on the display. Also adjust the brightness to the desired condition. C.
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On Screen Display Controller The IC802 on video board is designed for display the built-in characters or fonts onto monitor screen. The display operation is by transforming data and control information from micro controller to RAM through a serial data interface. Pin2 is used to control the internal oscillator frequency by DC voltage input from external low pass filter (R830, C817, R833) and filter (R832, C818) is used to regulate the appropriate bias current for internal oscillator the resonate at specific dot frequency.
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5-4 TRANSISTOR & DIODE CIRCUIT LOCATION FUNCTION AL DESCRIPTION D101 For C103 Discharge Q101 For LED Indicator Control D411 Speed up for Q410 D412 Damping Diode Q405 HDRV Mute Control Q409 Horizontal Driver Q410 Horizontal Out Put Q413 Horizontal Linearity Correction Control Q415~ Q419 Horizontal S-Correction Control Q429~ Q433...
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LOCATION FUNCTION AL DESCRIPTION Q901 MOS FET for Switching Power Control Q904 Start up CKT for IC901 Q912, Q913 To Turn 6.3V Supply Off when the Off Mode is Required Q908, Q909 To Turn 16V Supply Off when the Off or Suspend Mode is Required Q408 MOS FET for B+ Control Q406, Q407...
6.TROUBLE SHOOTING CHART 6-1 NO RASTER, CRT RELATIVE CIRCUIT PROBLEMS CHECK MAIN PCB CHECK MAIN PCB POWER SUPPLY POWER SUPPLY 180V,16V,80V 60.5V, 14.5V, 80V CHECK POWER SAVING CIRCUIT, H-SYNC, V-SYNC SIGNAL CHECK THE HIGE VOLTAGE OF CHECK THE HIGE VOLTAGE CRT ABOUT 25±0.3KV OR Q409 REFER ITEM S.M.P.S.
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2.ABNORMAL VIDEO LEVEL ON SCREEN HECK THE VOLTAGE OF IC801 CHECK THE VOLTAGE OF IC801 PIN7,15,18,21 PIN 6, 9, 22 ABOUT 12V CHECK 12V RELATIVE CIRCUIT CHECK THE SIGNAL INPUT OF R.G.B. ABOUT 0.7Vpp CHECK SIGNAL CABLE OR INTERFACE CARD. CHECK IC801 PIN5 CHECK IC801 PIN 15 CLAMP PULSE CLAMP PULSE PI...
6-2 ABNORMAL DISPLAY 1.NO SIGNAL ON SCREEN CHECK VIDEO IC801 VCC ABOUT 12V CHECK THE 12V PIN OF P802 CONNECTOR CHECK THEOUTPUTVOLTAGE CHECK THE OUTPUT VOLTAGE OF IC801 PIN16,19,22 ABOUT 3Vpp OF IC801 PIN 18, 20, 23 ABOUT 3Vpp CHECK THE RELATIVE CIRCUIT OF IC801 CHECK THE B+ VOLTAGE OF VIDEO PCB ABOUT 80V...
6-3 NO BLANKING CHECK THE RELATIVE CIRCUIT OF BLANKING CHECK THE RELATIVE CIRCUIT OF CHECK THE RELATIVE CIRCUIT D424,R497,ZD404 ON MAIN PCB OF C433, D410, R635, R636, IC105 ON MAIN PCB CHECK IC801 PIN11 VIDEO PCB,CHECK CHECK IC801 PIN 16 ON VIDEO PCB, G1 RELATIVE CIRCUIT Q702,Q703,Q704,C711,C712 CHECK G1 RELATIVE CIRCUIT...
6-5 ABNORMAL HORIZONTAL DEFLECTION 1. ABNORMAL HORIZONTAL WIDTH OF VIDEO READJUST H-WIDTH FUNCTION CHECK THE RELATIVE CIRCUIT CHECK THE RELATIE CIRCUIT OF Q409 OF Q404, Q405, & Q406 CHECK FBT B+ VOLTAGE CHECK FBT B+ VOLTAGE AT Q408 GATE ABOUT 60.0V AT FH=31KHz CHECK THE RELATIVE CHECK THE RELATIVE CIRCUIT OF SMPS.
6-10 POWER SUPPLY TROUBLE SHOOTING CHART BEFORE CHECK SW.REG. PLEASE REFER TO THE POWER SUPPLY BLOCK DIAGRAM POWER SUPPLY OUTPUT: (A) CONSTANT OUTPUT : 6.5V, 16V, 80V, 180 V, -10V BEAD SET ABNORMAL VARIABLE OUTPUT MAKE SURE THAT CHECK AC LINE THE VARIABLE VOLT 120V OR 220V OUTPUT IS NOT SHORTED...
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PARTS LIST OF IC601 ASS'Y LOCATION PART No. SPECIFICATION REMARK 5A 42501 Underlay Slice 5A 71 1 TRANSISTOR HOUSING FOR"IC601" 32A3028 8 MICA "FOR IC601" 90A 376 1 HEAT SINK M1A1730 10128 SCREW M3x10 IC601 56A 574 1 TDA9302H BY SGS PARTS LIST OF Q403/Q405/Q911/D408 ASS`Y LOCATION PART No.
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Q420 57A 600 14 CEPF630 BY CET PARTS LIST OF D921 ASS'Y LOCATION PART No. SPECIFICATION REMARK 90A6030 1 HEAT SINK D921 93A 6073A F R D 3A/400V 31DF4/I.R PARTS LIST OF 7" CPT TCO CRT ASS'Y LOCATION PART No. SPECIFICATION REMARK 750A57011AV...