Omron 8025G Maintenance Manual page 141

t-1AINTENANCE
AND REPAI
R
SECfrON 6
3. Replace the keyboard as described earlier.
4. Push the key cap down onto the key switch.
Keyboard Encoder Removal and Replacement. The keyboard encoder (an integra-
ted circuit) is located on the keyboard printed circuit card (see Figure 6-3). It
is installed in an integrated circuit socket. The caution concerning static discharg
given for circuit cards applies to removing or replacing the encoder.
Fuse Removal and Replacement. The terminal is protected by two fuses hous~
ed on the back panel, a 3/4 amp (F20l) and a 2 amp (F202). To remove them, discon-
nect the power cord, turn the post cap counterclockwise, and pull straight out.
Remove the old fuse from the cap. To install a fuse, insert it in the post cap,
push it into the post, and turn it clockwise to lock it in place.
Monitor Deflection Board Removal and Replacement. The Monitor Deflection
Board is located above the neck of the CRT. To remove the board, disconnect EIOI
through EI04 and PI02 through Pl12, excluding PI09, (see Figure 6-5). Then remove
four screws indicated in Figure 6-5 and lift the board off the chassis.
To install the board, position it on the chassis to aligh the mounting holes.
Replace the four mounting screws and reconnect all interconnects. Refer to the ter-
minal wiring diagram in Section 8 if in doubt about correct interconnection.
Figure
6-5.
Monitor Deflection Board i.nterconnections and
mounting screws.
6-18