IBM PCjr Hardware Maintenance And Service page 371

Heat Sink/Power Transistor Assembly
Replacement 1462
(3-
1.
2.
3.
4.
5.
6.
7.
8.
9.
o
Position heat sink/power transistor assembly Q
onto base cover.
Replace print mechanism assembly (1490).
Replace control circuit card (1417).
Replace driver circuit card (1422).
Replace fuse-filter card/power cord (1454).
Replace power transformer (1477).
Replace top cover (1434).
Replace access cover (1430).
Replace forms rack (1440).
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Graphics Printer 4-1400-39