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4402-001
Service Checks
Carrier Transport Service Check
FRU
1
System Board
Carrier Transport
Motor
2
Carrier Transport
Motor
3
Carrier Guide Rod
2-6
Service Manual
Action
Check the transport carrier motor connector J4. If
connected, check for approximately 28 volts on
pins 1 and 2 or at the wire connections located on
the rear of the transport carrier motor. If voltage is
incorrect, replace the system board. If voltage is
correct, check the motor for shorts.
Check the motor for binds, or loose motor pulley.
A noisy or chattering motor or a motor that fails to
turn can be caused by:
•
An open or short in the motor.
•
An open or short in the motor driver
on the system board.
•
A bind in the carrier transport
mechanism.
With the carrier transport motor cable (J4)
disconnected from the system board, check for 0
to 10 ohms between the following pins on the
motor:
J4-1 and J4-2
If the readings are incorrect, replace the print
engine. Go to the
page
4-11.
Clean the carrier rod.
Note: Lubricate the rod and the carrier rod bearing
surfaces with grease P/N 99A0394.
"Print Engine Removal" on
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