Wyse WY-60 Maintenance Manual page 24

3. Check the fuse. If the fuse is broken or blackened, push a
new fuse into the fuse socket.
If the fuse is good, push it back into the fuse socket.
4. Replace the terminal enclosure (see "Replacing the Terminal
Enclosure" for instructions).
Removing and Replacing the Terminal PCB
Tools required:
o No.2 Phillips screwdriver
o Flat-bladed screwdriver
o Alligator clips
To remove the terminal PCB (see Figure 2-7), follow these steps:
1. Unplug the terminal and remove the shielded RS-232
communication cable.
2. Remove the terminal enclosure.
3. Slide the barrier plates mounted on either side of the back
bezel out from under the restraining tabs.
4. Leaving the terminal on its face, pull the back bezel off
the terminal frame.
5. Discharge the anode (see "Discharging the Anode" for
instructions) .
6.
Disconnect the anode lead.
7. Disconnect the yoke harness connector, P201, from the
terminal PCB.
Warning--Handle the CRT neck carefully. If you break it,
flying glass can injure anyone within a radius of six to ten
feet.
8. Disconnect the tube socket from the neck of the CRT.
9.
Unscrew the two Phillips No.2 screws that secure the
grounding wires to the CRT wire frame.
Caution--Don't remove the Phillips screws directly
underneath the rear panel on the terminal PCB. They fasten
the rear panel to the terminal PCB.
10. Remove the four plastic studs that secure the ESD shield to
the back of the terminal PCB.
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