Repair manual

PARTS REPLACEMENT
4-14
E. REPLACING THE CRT
Note: CRT replacement is to be performed at depot facilities only.
1. SPECIAL EQUIPMENT NEEDED:
Host Computer
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 4-6)
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 toward the rear and
remove it from the chassis.
c Remove the Light Shield.
d. Cut the tie-wrap holding the grid cathode wires to the CRT gun.
e. Unplug the CRT socket from the CRT.
f. Using your fingers, lift up the lip of the anode cap to expose the spring
contacts. While firmly holding the cap, use a greenstick to depress and
unhook one of the contacts. Lift out the anode cap/connector.
Caution: Do not use metal pliers or a screwdriver since they
could cause accidental CRT breakage.
g. Unplug the vertical and horizontal deflection connectors from the
Monitor Board Assembly.