Heat Sink/Power Transistor Assembly Removal - IBM 5150 Hardware Maintenance Manual

Heat Sink/Power Transistor Assembly Removal
1.
Position Printer Power switch to OFF; unplug printer power
cord from wall outlet and disconnect Parallel Printer Cable.
2. Remove forms.
3. Remove forms rack (Se<e page 3-56).
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4.
Remove access cover (See page 3-32).
5.
Remove top cover (See page 3-88).
6.
Remove power transfonner (See page 3-74).
7. Remove fuse-filter card/power cord (See page 3-60).
8. Remove driver circuit card (see page 3-51).
9. Remove control circuit card (See page 3-45).
10. Remove print mechanism assembly (See page 3-80).
11.
Lift heat sink assembly
II
from base cover.
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