How to replace
Removal
1 • Remove the following covers:
Lamp cover A and back cover B, (section 4•2 steps 1-2).
2 • Remove the two 2.5 mm countersunk screws A on each side of the
hardware unit and carefully slide the unit partially out.
3 • Using a special PLCC removal tool, (fig. 2), remove the SCSI control-
ler from IC20 on the CPU module.
Note: only use the special PLCC removal tool. Do not use other
tools, otherwise the chip socket will be damaged.
Assembly
4 • Fit a new SCSI controller into IC20 on the CPU board.
5 • Carefully push the hardware unit fully in, (connector J1 on the driver
board mates with the backplane) and fit the two 2.5 mm counter-
sunk allen screws A on each side of the unit.
6 • If no further replacement operations are required refit the covers
removed in step 1 in accordance with section 4•2.
Adjustments and tests required
No adjustments are required
Service Manual • ScanMate 4000/5000 Edition 1 • January 1996
SCSI Controller
4•8b
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