Replace Dc Motor; Replace Stepper Motor; Replace Stacker Sensors; Replace Power Supply - Monarch 9820 Service Manual

9820/9830/9835 Service Manual
removed from the stacker. Be careful not to lose
the spring.
17. Slide the front main frame off the tamper plate
shaft and gently pull it clear of the stacker.
18. The old lower transport assembly should now be
held in place by the four remaining plastite screws
on the rear main frame (118475).
19. Remove 4 screws holding the assembly in place,
and remove the lower transport assembly.
20. Install the replacement kit.
21. Reassemble in reverse order.

Replace DC Motor

1. Unplug stacker power and stacker-to-knife cable.
2. Remove rear, back, and side covers.
3. Disconnect motor wiring harness at motor
terminals 1 and 2.
4. Remove four motor mounting screws, belt, and
motor assembly.
5. Reassemble in reverse order.

Replace Stepper Motor

1. Unplug stacker power and stacker-to-knife cable.
2. Remove rear, back, and side covers.
3. Loosen set screws and remove belt speed
adjustment knob.
4. Remove belt adjustment potentiometer mounting
nut and washer.
5. Remove four screws and electronics cover.
6. Disconnect motor wiring harness at control board
connector P1.
7. Remove four motor mounting screws, belt, and
motor assembly.
8. Reassemble in reverse order.

Replace Stacker Sensors

The stacker full and stacker jam sensors share the
same wiring harness, so replace as an assembly.
1. Unplug stacker power and stacker-to-knife cable.
2. Remove screw attaching stacker full sensor to
stacker bed.
3. Remove 2 clips holding sensor wiring harness to
the stacker bed.
4. Thread sensor cable through frame to control
board.
5. Loosen set screws and remove belt speed
adjustment knob.
6. Remove 4 retaining screws and electronics cover.
64 TC9830SM Rev. B 7/98 Confidential
7. Remove 4 screws holding control board to
standoffs.
8. Slide sensor out of transport mounting and thread
sensor cable through frame back to control board.
9. Move control board back to expose sensor wiring
harness connector.
10. Disconnect wire harness from control board
connector CN3 and remove sensor.
11. Reassemble in reverse order.

Replace Power Supply

1. Unplug stacker power and stacker-to-knife cable.
2. Loosen set screws and remove belt speed
adjustment knob.
3. Remove belt adjustment potentiometer mounting
nut and washer.
4. Remove 4 retaining screws and electronics cover.
5. Remove four power supply mounting screws.
6. Tilt power supply up to disconnect wiring harness
at connectors J1 and J2.
7. Remove power supply.
8. Reassemble in reverse order.

Replace Control Board

1. Unplug stacker power and stacker-to-knife cable.
2. Loosen set screws and remove belt speed
adjustment knob.
3. Remove belt adjustment potentiometer mounting
nut and washer.
4. Remove 4 retaining screws and electronics cover.
5. Disconnect harness connectors at control board
connectors J1, J2, and J3.
6. Remove the four screws holding the control board
to the standoffs.
7. Disconnect power supply harness at control board
connector CN1.
8. Remove control
board.
9. Reassemble in
reverse order.

Figure D- 6. Power Supply/Control Board.

Model 928 Stacker
July 1998