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 • Remove the CPU module by lifting away from connectors J12 and
J13 on the control board.
Assembly
4 • Fit the new CPU module onto connectors J12 and J13 on the control
board.
Note: in isolated cases, it is possible to fit the module both ways,
therefore it is important that the side with the SCSI controller is to
the right hand side as viewed from the back of scanner.
5 • Partially refit the hardware unit, (section 4•5 steps 7-10).
6 • Carry out the adjustment and test operations specified below.
7 • 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.
8 • If no further replacement operations are required refit the covers
removed in step 1 in accordance with section 4•2.
Adjustments and tests required
White calibration in transmission and reflection (section 5•5).
Focus calibration (section 5•4).
Register error (section 5•12).
Stripes in shadow (section 5•13).
Service Manual • ScanMate 4000/5000 Edition 1 • January 1996
CPU Board
4•7b
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