Repair manual

PARTS REPLACEMENT
4-22
H. REPLACING THE MONITOR BOARD ASSEMBLY
Note: Monitor Board Replacement is to be done onloy at depot facilities.
1. SPECIAL EQUIPMENT NEEDED:
Digital Palette Gentest Diskette
Host Computer
Video Photometer
Oscilloscope
K42769 Edmonds Scientific 6X Loupe
12979 Final Assembly Alignment Gauge
12991 CRT Collimation Master
12992 CRT Collimator
1-150 Light Source
C-1300 Null Meter
12993 Camera Back Collimator
12988 35mm Collimation Adapter
12996 35mm Fiber Optics Locator Assembly
12995 35mm Adapter Collimation Master
12974 35mm Lens Adjust Wrench
12994 108 Adapter Collimation Master
12974 108 Lens Adjust Wrench
2. REMOVAL: (Figure 4-7)
a. Disconnect AC power from the system.
b. Remove the six screws and washers holding the Cover to the bottom of
the chassis (Figure 4-2). Slide the Cover to the rear and off the chassis.
c. Remove the high voltage insulation board.
d. Remove the Light Shield (Figure 4-6).
e. Remove the three screws holding the Monitor Board Assembly to the
chassis.
Caution: If parts drop into the chassis, remove them immediately
since they may short out and damage components.
f. Cut the tie-wrap holding the yellow and green wires on the CRT gun.
(Figure 4-6).
g. Disconnect the CRT socket from the CRT (Figure 4-6).