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Wells-Gardner Electronics Corporation
Service Manual for
D9300 Series
Digital-Control Color Monitor
Wells-Gardner Electronics
th
5500W. 55 Street Suite A
Mc,Cook Illinois 60525-3605
(708) 290-2100
069X3045-100
ECN: E01024
Date: 8-18-00
Printed on 03/20/03
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Wells-Gardner Electronics Corporation INDEX 1. SAFETY PRECAUTION………………………………1 2. SPECIFICATION……………………………………… 2 3. TECHNCIAL FEATURES…………………………….3 4. TIMING CHART……………………………………….4 5. SET UP…………………………………………………..6 6. CONTROLS AND ADJUSTMENT…………………... 7 7. ADJUSTMENT SPECIFICATION……………………12 8. DESCRIPTION OF CIRCUIT OPERATION………...17 9. TROUBLE SHOOTING………………………………..21 ii
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Wells-Gardner Electronics Corporation 1. 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. 1-1 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). 1-2 Many electrical mechanical
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Wells-Gardner Electronics Corporation 2. SPECIFICATION: 2-1 Picture Tube. Size: 18V Dot Pitch: .25mm 2-2 Signal Input. Video Input: Analog, Positive Signal (0.7V p-p) Horizontal Sync: TTL Level, Positive or Negative Pulse Scanning : 28 KHz-70KHz Vertical Input: TTL Level, Positive or Negative pulse Scanning : 40-160Hz 2-3 Power Supply. Power Input : 120-240 VAC, 50/60Hz Fuse Rating: 250V, 3.15A Power Consumption Normal : less than 130W 2-4 OSD (On Screen Display) Contr
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Wells-Gardner Electronics Corporation 3. 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. 3-2 Universal AC Input Voltage. Power supply operates on 120-240 VAC at 60/50Hz for use all over the world. 3-3. Protection Circuit for over-current. When an over-current condition occurs in the circuit, the protection ci
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Wells-Gardner Electronics Corporation 4. TIMING CHART: Factory Pre-Set Timing Modes. Horizontal and Vertical Timing Diagram for Table 1 . TABLE 1 : QUANTUM 801GX MVP-NSW US500 MK6 VGA_M4 FORMAT MODE 1 MODE 2 MODE 3 MODE 4 DESCRIPTION 640*400 640*400 640*480 8514/A 1024*768 FH 29.63Hz 31.5KHz 31.35KHz 35.552KHz A 33.75 31.778 28.251 28.251 µs µs µs µs B 1.76µs 3.88µs3.86µs 3.920µs HC 3.52µs 1.84µs 2.04µs 1.247µs D 26.67 25.4 25.5 22.806 µs µs µs µs E 1.86µs 0.63µs 0.58µs 0.170µs POL. POSITIVE
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Wells-Gardner Electronics Corporation QUANTUM 801GX VG900602 DMT8075 VS900603 VG901101 VG901101 FORMAT MODE 5, S-VGA MODE 6 MODE 7 VGA MODE 8 MODE 9 DESCRIPTION VESA 680*480 VGA 800*600 VESA 800*600 VESA 800*600 VESA 1024*768 FH 37.500KHz 37.879KHz 46.875KHz 48.077KHz 48.363KHz A 26.667us 26.400µs 21.333µs 20.800µs 20.677µs B 2.032us 3.200µs 1.616µs 2.400µs 2.231µs H C 3.810us 2.200µs 3.232µs 1.280µs 1.615µs D 20.317us 20.000µs 16.162µs 16.000µs 15.754µs E 0.508us 1.000µs 0.323µs 1.119µs 0.
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Wells-Gardner Electronics Corporation 5. 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: 5.1 Start Up. Your monitor starts up automatically when you insert the power plug to power source. 5-2. Single Cable Connection. Connect the 15pin signal cable to the source and lock both screws to ensure that the monitor is properly grounded. D type 15pin connector: PIN NO. DESCRIPTION PIN NO. DESCRIPTION 1 VI
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Wells-Gardner Electronics Corporation 6. 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. 1. MODE/EXIT MODE – Call the Main-Menu OSD 2. SEL / Degauss SEL – Call the Sub-Menu OSD Degauss – Degausses the CRT (active when the OSD is not displayed) 3. DOWN/UP When the Main-Menu is displayed, you can select each function using these keys. When the Sub-Menu is dis
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Wells-Gardner Electronics Corporation 6-3. OSD Controls - User’s control. A. BRIGHTNESS ADJUSTMENT. 1) Press the “MODE” key then Main-Menu OSD comes out as figure on next page. 2) Search “BRIGHTNESS” sub-menu using “UP/DOWN” key on the Main-Menu OSD. 3) Select the “BRIGHTNESS” by pressing “SEL” key. The “BRIGHTNESS” OSD color changes from yellow to red. 4) Adjust Brightness as much as you want using “UP/DOWN” key. 5) After finishing the Brightness adjust, press the “MODE” key. The “BR
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Wells-Gardner Electronics Corporation A. BRIGHTNESS ADJUSTMENT B. CONTRAST ADJUST SAME ABOVE C. H. POSITION ADJUST SAME ABOVE D. H. SIZE ADJUST SAME ABOVE E. V. POSITION ADJUST SAME ABOVE F. V. SIZE ADJUST SAME ABOVE G. PINCUSHION ADJUST SAME ABOVE H. TRAPEZOID ADJUST SAMEABOVE I. PARRALLELOG ADJUST SAMEABOVE J. PIN BALANCE ADJUST SAME ABOVE 9
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Wells-Gardner Electronics Corporation 6-3 OSD Controls (continued): K. COLOR ADJUSTMENT 1) Press the “MODE” to show the Main-Menu OSD as shown by the left-below figure. 2) Search the “COLOR” sub-menu using “UP/DOWN” key on the Main-Menu OSD. 3) SELECT the “COLOR” by pressing “SEL” key. The color Sub-Menu OSD appears as shown by the right-below figure. 4) Search “USER” using “UP/DOWN” key. (“COLOR1” and “COLOR2” are adjusted in factory by auto-alignment machine.) 5) Press “SELECT” key to
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Wells-Gardner Electronics Corporation L. RECALL. When the “RECALL” key is pressed, all user’s adjustment values are changed to the factory values. M. LANGUAGE. The menu is available in four languages. 1. Press the “MODE” key and the Main-Menu OSD will appear as in the previous figure. 2. Search the “LANGUAGE” sub-menu using the “UP/DOWN” key on the Main-Menu OSD. 3. Select the “LANGUAGE” by pressing the “SEL” key. Then the Language sub-menu will appear as in the following figure 4. Sear
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Wells-Gardner Electronics Corporation 7. ADJUSTMENT SPECIFICATION: 7-1. Adjustment Sequence: The monitor requires a min. of 15 minutes warm up time before adjustment. 7-2. Adjustment Sequence: FBT B+ Voltage → G2 Voltage → Hor. Center → Hor. Size→ Hor. Position → Ver. Size → Ver. Position → Side-pin → Trapezoid→ Focus → White Balance → Convergence (if needed). 7-3. Adjustment Procedure - How to enter the Factory Mode: Press Menu and Down simultaneously and hold down for three seconds. Adjus
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Wells-Gardner Electronics Corporation 7-3.5 Purity and Convergence Adjustment. (If Required) A. Purity Adjustment. 1. Demagnetize the picture tube and cabinet using a degaussing coil. 2. Turn the CONTRAST and BRIGHTNESS controls to maximum. 3. In User Color Menu, adjust RED and BLUE controls to provide only a green raster. 4. Loosen the clamp screw holding the yoke and slide the yoke backward to provide vertical green belt (zone) in the picture screen. 5. Remote the Rubber wedges 6. Rotate
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Wells-Gardner Electronics Corporation 7-3.6 White Balance adjustment (video). 1. Warm up the unit for 15 minutes 2. Input the window pattern with 31KHz 640*480 mode. 3. Adjust the color temperature to be X=0.285+/-0.015 and Y=0.293+/-0.015 by R.G.B. gain on User Color Menu or User Preference. 7-4 OSD FACTORY CONTROL This should be adjusted by a technician or qualified repair personnel. This monitor has two-adjustment modes. One is for the user’s own adjustment and other is for factory a
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Wells-Gardner Electronics Corporation B. Exit and save. (Save is automatic) 1. After finishing adjustments, select “RECALL” using “UP/DOWN” key. 2. Press “SEL” key until OSD disappears. The adjusted value is saved and exits from the factory mode. C. Adjustment. All adjustment methods are same as user’s control mode except “COLOR” 7-5 White balance Adjustment: A. Pre-adjustment. 1. Warm up monitor for 15 minutes. 2. Input the small window pattern with 31KHz 640*480 mode. 3. Degauss the
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Wells-Gardner Electronics Corporation 7-5 B. Color Adjustment 16
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Wells-Gardner Electronics Corporation 8.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 below) Frequency Range of Frequency OUTPUT (MCU PIN) No. Resolution (CS3) (CS2) (CS1) OFF ST-BY SUS-P LED Hf Vf Hf (KHz) Vf (Hz) KHz Hz 38 39 40 5 3 4 6 1 31 70 720x400 28 ~32.9 68 ~ 72 L L L L H L L 2
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Wells-Gardner Electronics Corporation 8-2 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. 8-2.1.4 Horizontal driver output. The output pulse having the duty-cycle of 47% is available at pin 26 of IC30
