4-8 Troubleshooting
Testing the Ribbon and Pick Motors
Because the ribbon and pick motors are identical, swapping the two motors can
isolate whether the motor is faulty or the control board is faulty.
1. Remove the wires from both motors.
2. Take the two wires from the operable motor and connect them to the motor
to be tested. (The pick motor is shown below for reference.)
3. Using Diagnostics, operate the motor. (Note that the motor you select in
Diagnostics is the opposite of the one you are actually testing. If in doubt,
operate both motors from Diagnostics.)
Testing the Cam Motor
Use care with this procedure. Even though the motors are different, their
controlling circuitry is similar. The connectors are not compatible, but can be
interchanged for testing purposes only.
1. Unplug the DC motor harness (ribbon and pick motors).
2. Connect the cam motor to one side of the DC motor connector as shown
below. (Note that you will receive a repetitive error as described on page
4-4
when the printer is powered up.)
• Connect the cam motor to either pick or ribbon motor positions. The
motor connector does not fit properly in the socket but fits enough for
testing purposes.
3. Using the motor tests diagnostics, operate the ribbon or pick motor and see if
the cam motor rotates.
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