How to replace
Note: removal and assemby of the SM 4000 and SM 5000 amplifier
boards are identical.
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 • Disconnect connector J4 on the driver board in order to pull the
hardware drawer further out, enough to gain access to the three
amplifier boards.
4 • Remove the relevant amplifier board from the control board by
opening the two side clips, carefully rotating the board towards the
back of the scanner and lifting away.
Note: always remove #1 amplifier board first, (on J1 on the control
board), followed by #2, (on J2) and then #3, (on J3).
Assembly
5 • Refit the amplifier board(s) to the control board by carefully mount-
ing at an angle, rotating to the vertical position and locking with the
two side clips.
6 • Reconnect connector J4 on the driver board.
7 • Carefully push the hardware unit fully in, (connector J1 on the driv-
er board mates with the backplane) and fit the two 2.5 mm counter-
sunk allen screws A on each side of the unit.
8 • Carry out a white calibration in transmission and reflection (section
5•5).
9 • If no further replacement operations are required refit the covers
removed in step 1 in accordance with section 4•2.
Adjustments required
White calibration in transmission and reflection (section 5•5).
Service Manual • ScanMate 4000/5000 Edition 1 • January 1996
Amplifier Board
4•9b
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