Procedure 13 - Removing And Replacing The Crt Monitor Board Assembly - Control Data Corporation CDC CC63X Hardware Maintenance Manual

Procedure 13 - Removing and Replacing the CRT Monitor Board
Assembly
Replace the CRT monitor board assembly as follows.
1. Remove the logic drawer assembly (procedure 4).
2. Disconnect the CRT socket connector.
3. Disconnect the in-line connector to the yoke.
4. Remove ribbon cable connector on bottom inside corner of
CRT monitor board.
5. Remove the high voltage lead from the side of the CRT.
NOTE
When doing the next step, note which
grounding tab on the bezel adapter
assembly the ground strap is removed
from. The ground strap must be
reconnected to the same tab during
reassembly.
6. Remove the ground strap from bezel adapter assembly going
to CRT socket connector.
7. Remove the two screws at the top of the CRT monitor board
and lift it upwards to clear the shield (figure 6B-13).
8. Replace CRT monitor board by performing steps 1-8 in the
reverse order. ( '
"'--/
6B-20
CAUTION
Ensure that ribbon-cable connector
(removed in step 4) is not mis-
aligned. It should fit squarely in
the receptacle after installation.
After installing connector, check
for correct alignment by looking
down through top of terminal and in
from rear of terminal before replac-
ing access lid and logic drawer
(procedures 3 and 4).
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