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d. While holding the sensor in place, tighten the two screws securing the sensor.
Do not rotate the dummy drum before removing the drum plate, as this may
damage the sensor.
e. Remove the drum plate.
f.
g. Connect the surface potential power supply to the dummy drum, using the
h. Replace the drum plate.
5. Remove the screw holding the GND clip on the plate with the bearing. Place the
ring terminal (green wire) of the power supply under the screw and re–attach the
GND clip.
6. Remove both rear covers from the printer. (Refer to page 10–6 in Chapter 10,
"Replacement Procedures.")
7. Connect the power supply to the stacker power connector located near the
breaker.
8. Remove the cables attached to CN2 and CN4 on the MPU board. Connect both
cables from the engine checker box to CN2 and CN4.
9. Turn the rotary switch on the MPU board to position 2.
NOTE: The engine checker works with firmware versions 1.7C and above. Verify
10. By–pass the interlock switch using a staple and jumper pins 1 and 4.
11. Power the printer ON. The engine checker displays the following:
If no message appears, check the connections in the previous steps. Verify that no
printer faults exist and that paper is not on the transport unit.
9–12
Rotate the dummy drum so that the small bar on the drum is not under the
sensor.
faston connector (white wire).
the firmware on the MPU board in sockets 26 and 30.
BASIC MENU
DEVICE CHECK, VOLUME
CAUTION
Board Adjustments
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