Video Amplifier Board Replacement - EDL Displays 6120 Operation And Maintenance Manual

VIDEO AMPLIFIER BOARD REPLACEMENT

(Red, Green and Blue) P/N 6119-0105-03
Tools Required: 1. Screwdriver, common straight slot.
2. Adjustment tool, insulated 1/8" straight slot.
REPLACEMENT PROCEDURE
1. Turn a.c. power OFF at the front panel.
2. Disconnect the monitor a.c. power cord.
3. Disconnect the coaxial cable on the Video Amplifier Board being replaced.
4. Unscrew the two captive screws on the Video Amplifier Board.
5. Remove the Video Amplifier Board; inspect, as a precaution, the connector for bent
pins, and inspect the mating connector on the Mother Board for damage.
6. Note the position of the adjustment pots in the defective Video Amplifier Board.
7. If the defective amplifier had been operating properly prior to the failure, then using
a small screwdriver, position The Black and Gain adjustments in the replacement
amplifier to match its counterpart in the defective amplifier.
Range and Null adjustments should not be changed except during the Video
Amplifier Alignment Procedure.
8. Carefully i n sert the replacement Video Amplifier Board in its slot making sure the
connector is properly aligned with the mating connector on the Mother Board.
9. Tighten the two captive screws to seat the module and complete the connection to
the Mother Board.
10. Connect the coaxial input cable and a.c. power cord.
11. Apply a.c. power and input signals and check the display for proper operation.
12. Optimum picture quality may be attained by performing the Video Amplifier
Alignment Procedure.
6115 - 6120 Operation and Maintenance Manual ©EDL Displays, Inc. January 1997
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CAUTION : The