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Summary of Contents for Wells-Gardner D9100 Series
- Page 1 Service Manual for D9100 Series Digital-Control Color Monitor Wells-Gardner Electronics 9500 W. 55 Street, Suite A McCook, IL 60525-3605 (708) 290-2100 069X3015-100 Revision: A / E01023 Date: 7-27-00 Printed on 02/11/04...
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Page 2: Table Of Contents
SAFETY PRECAUTION……………………………… 1 SPECIFICATION……………………………………… 2 TECHNCIAL FEATURES……………………………. 3 TIMING CHART………………………………………. 4 SET UP………………………………………………….. 6 CONTROLS AND ADJUSTMENT…………………... 7 ADJUSTMENT SPECIFICATION…………………… 10 DESCRIPTION OF CIRCUIT OPERATION………...13 TROUBLE SHOOTING……………………………….. 18 INDEX... -
Page 3: Safety Precaution
SAFETY PRECAUTION: WARNING: Service should not be attempted by anyone unfamiliar with the necessary precautions on this unit. The following precautions are necessary during servicing. Some parts, such as a picture tube in this unit, have special safety-related characteristics for X-RAY RADIATION protection. For continued safety, the parts replacement should be undertaken referring to below article (1-2 and 1-5). -
Page 4: Specification
SPECIFICATION: 2-1.1 Picture Tube. • Size: 14”, 15”, 17”, 19”(18V) • Dot Pitch: 14” : 0.26 – 0.28mm 15” : 0.26 – 0.28mm 17” : 0.26 – 0.28mm 19” (18V): 0.25mm 2-1.2 Signal Input. • Video Input: Analog, Positive Signal (0.7V p-p) •... -
Page 5: Techncial Features
TECHNICAL FEATURES: 3.-1 Microprocessor control with OSD (On screen display menu). Microprocessor recognizes the input computer signal and signal output from the customer control board connected to the main board by a flat cable. Universal AC Input Voltage. Power supply operates on 120-240 VAC at 60/50Hz for use all over the world. 3-3. -
Page 6: Timing Chart
TIMING CHART: Factory Pre-Set Timing Modes. Horizontal and Vertical Timing Diagram for Table 1. MODE 1 DESCRIPTION VGA 720*400 31.469KHz 31.778µs 3.813µs 1.907µs 25.422µs 0.636µs POL. NEGATIVE 70.087Hz 14.268ms 0.064ms 1.112ms 12.711ms 0.381ms POL. POSITIVE VIDEO ANALOG TABLE 1 : MODE 2 MODE 3 VGA 640*480... - Page 7 MODE 5, S-VGA DESCRIPTION VESA 800*600 37.879KHz 26.400µs 3.200µs 2.200µs 20.000µs 1.000µs POL. POSITIVE 60.317Hz 16.579ms 0.106ms 0.607ms 15.840ms 0.026ms POL. POSITIVE VIDEO ANALOG MODE 9 DESCRIPTION VESA 800*600 53.674KHz 18.631µs 1.138µs 2.702µs 14.222µs 0.569µs POL. POSITIVE 85.062Hz 11.756ms 0.056ms 0.503ms 11.179ms 0.019ms...
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Page 8: Set Up
SET UP: Setting up your monitor is easy. All you have to do is make a few simple connections and adjustments. The procedure is as follows: Start Up. Your monitor starts up automatically when you insert the power plug to power source. 5-2. -
Page 9: Controls And Adjustment
CONTROLS AND ADJUSTMENTS: There are four switches on the control panel. Adjustable controls allow the best display status for individual requirements. 6-1. Key Function. MODE/EXIT MODE – Call the Main-Menu OSD SEL – Call the Sub-Menu OSD DOWN/UP When the Main-Menu is displayed, you can select each function using these keys. - Page 10 CONTRAST ADJUST H. POSITION ADJUST H. SIZE ADJUST V. POSITION ADJUST V. SIZE ADJUST PINCUSHION ADJUST TRAPEZOID ADJUST PARRALLELOG ADJUST PIN BALANCE ADJUST SAME ABOVE SAME ABOVE SAME ABOVE SAME ABOVE SAME ABOVE SAME ABOVE SAME ABOVE SAME ABOVE SAME ABOVE...
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Page 11: Color Adjust
6-3 OSD Controls (continued): COLOR ADJUST... -
Page 12: Adjustment Specification
7. ADJUSTMENT SPECIFICATION: 7-1. Adjustment Sequence: The monitor requires a minimum of 15 minutes of warm up time before adjustment. 7-2. Adjustment Sequence: FBT B+ Voltage Size Ver. Position Focus White Balance 7-3. Adjustment Procedure. How to enter the Factory Mode: Press Menu and Down simultaneously and hold down for three seconds. - Page 13 7-3.5 Pre-adjustment. Warm up monitor for 15 minutes. Input the small window pattern with 31KHz 640*480 mode. Degauss the screen with Manual degaussing coil. 7-3.6 White Balance adjustment (background raster). Remove the video signal. Adjust the sub-brightness of background raster to be just out of cutoff (black) to be 0.7FtL +/- 0.2FtL with SUB BRIGHTNESS control VR501.
- Page 14 7-3.8 Purity and Convergence Adjustment (continued) Check the purity of the red and blue raster by adjusting the bias controls. Obtain a white raster, referring to “CRT GRAY SCALE ADJUSTMENT” Proceed with convergence adjustment. Convergence adjustment: Change to a crosshatch pattern with a color signal generator. Adjust the BRIGHTNESS and CONTRAST controls for well defined pattern Adjust two tabs of the 4-pole magnets to change the angle between...
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Page 15: Description Of Circuit Operation
DESCRIPTION OF CIRCUIT OPERATION: 8-1. Mode Control. 8-1.1 H-Sync is inputted to pin 30 of IC601, V-Sync to pin 29 of IC601 for each mode and pin 27, 26 of IC601 output always positive polarity sync. 8-1.2 The outputs from IC601 are as below (See table 1) Frequency Resolution 720x400... - Page 16 Deflection Processor (IC301): 8-2.1 Horizontal section. 8-2.1.2 Horizontal Oscillation. Horizontal free frequency is set to 48KHz by R314 and C347. Auto- sync processing can be done from 28KHz to 70KHz by means of IC301 without any adjustment. 8-2.1.3 Phase Shift. Horizontal phase shift is controlled by IC601 using I²C BUS control.
- Page 17 8-2.2 Vertical section: 8-2.2.1 Vertical oscillation. The free running frequency of the vertical oscillator is determined by the capacitor C342 at pin VCAP (pin22) of IC301. 8-2.2.2 Vertical amplitude. Vertical amplitude is controlled by IC601 using I²C bus control. 8-2.2.3 Vertical position.
- Page 18 Horizontal deflection output stage: 8-5.1 Line driver stage. As a driver device, small MOSFET Q307(IRF630A) is used. The driver transformer T302 is equipped with a snubber circuit (R327/C309) at the primary side to damp excessive ringing. 8-5.2 Horizontal power output stage. The horizontal power output stage is a conventional one with a diode modulator.
- Page 19 8-8.1. Video pre-amplifier(IC401). Input video signals are amplified by means of IC401, and the amplified signals drive the video output stage (IC402). Video gain is adjusted by DC voltage at pin 12 for ABL control. 8-8.2. Video output stage (IC402). The video output signals from IC401 are amplified again by IC402, and IC402 applies video signals to each cathode of the CRT.
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Page 20: Troubleshooting
9.0 TROUBLESHOOTING 9.1 No Power... - Page 21 9-1. NO VIDEO:...
- Page 22 9-2. NO RASTER:...
- Page 23 TROUBLE IN HORIZONTAL SIZE:...
- Page 24 9-5. TROUBLE IN CONTRAST:...
- Page 25 9-6. TROUBLE IN BRIGHTNESS:...
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