Steris Amsco 3085 SP Maintenance Manual Download Page 122

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7-17

764332-898

7. Remove bottom screw (16) and washers (17, 20 and

19) holding PC board to column.

8. Remove PC board.

9. Attach new PC Board Assembly to column.

NOTE: Plugs P28 and P29 look alike but are not
interchangeable. Check the cable indicators to ensure they
are plugged into PC board properly.

10. Attach cable plugs.

11. Attach all cable ties to the board assembly, side

and bottom.

12. Verify jumpers on control board.

7.20.2 Override Switch PC Board Assembly

NOTE: The numbers in parentheses () refer to items found
on Figure 1 located in Illustrated Parts Breakdown (refer to
Tab) unless otherwise noted.

1. Lower table to lowest position.
2. Lower shroud as described in

3. Raise table to maximum height.

4. Unscrew and remove red toggle boot seal (53) and

four grey toggle boot seals (52) holding switch
assembly on skirt.

5. Remove four screws (42) and washers (28) holding

override switch housing (62) to override bracket
(67).

6. Unplug override switch harness and remove

override switch housing (62).

7. Carefully remove and replace override switch

board (54).

NOTE: If existing override switch assembly has the
connector mounted to the component side of the board
(original configuration for table serial number range
B420702-032 through B430302-041), discard the
assembly and replace with P150830-758 which has
connector on solder side of board and uses harness
P134469-476 (both included in P764333-935.

Important:

Check fit of override switch assembly in

weldment when switch panel is mounted flush. Hose
guide plate may need to be bent away from connector to
eliminate interference with connector. Protect the
electrical insulating material while bending the plate (see
Figure 7-6).

8. Return assembly in reverse order.

Figure 7-6. Proper Fit of Override Board Into

New Hose Guide Plate

7.20.3 Override Control PC Board Assembly

NOTE: The numbers in parentheses () refer to items found
on Figure 4 located in Illustrated Parts Breakdown (refer to
Tab) unless otherwise noted.

1. Lower table to lowest position.
2. Lower shroud as described in

3. Raise table to maximum height.

4. Remove P9/P10 cable assembly.

5. Remove four screws and lockwashers holding

override box assembly (23) to saddle.

6. Disconnect P8 and P9 cable assemblies.

7. Remove assembly from table.

8. Install new assembly in reverse order.

7.20.4 Power Control PC Board

NOTE: The numbers in parentheses () refer to items found
on Figure 3 located in Illustrated Parts Breakdown (refer to
Tab) unless otherwise noted.

1. Remove shroud as described in

2. Remove three screws (38) and washers (39) holding

power supply assembly cover in place. Power
Control PC board (40) is on underside of this cover.

3. Lift cover and tilt back.

4. Disconnect plugs P5 and P6.

5. Turn cover over. Carefully slip PC board (40) off

nylon standoffs, five places.

WARNING – ELECTRIC SHOCK HAZARD:
Before replacing PC boards or power
supply assembly, disconnect all power
sources; i.e., wall plug, control battery and
(if a battery- operated table) the motor
battery positive terminal.

Hose Guide Plate May Need Bent in
This Area Away From Switch to
Remove Any Interference

Switch Panel Mounted Flush
to This Surface

Electrical Insulation is
Present on Weldment