Xerox ColorQube 9303 Series Service Manual page 1332

Four Wire Stepper Motor
NOTE: A stepper motor with an internal open circuit may appear to be fully functional under
dC330 component control. However, under normal operation it will run with intermittent failure.
Use the standard digital meter to check that the resistance of the stepper motor coils are simi-
lar.
• Go to wiring diagram shown in Figure
GND on the harness when the component control code for the motor is entered. If the
pulses are present, install a new motor.
• Disconnect PJ202. Check the phase pulses to GND at the PWB when the component
control code for the motor is entered. If the pulses are present, check the connections and
wiring. Repair or install new wiring as necessary. If pulses are not present at the PWB,
install a new PWB.
References:
• 01H +24V Distribution RAP.
• 01L 0V Distribution RAP.
• REP 1.1 Wiring Harness Repairs.
Six Wire Stepper Motor
NOTE: A stepper motor with an internal open circuit may appear to be fully functional under
dC330 component control. However, under normal operation it will run with intermittent failure.
Use the standard digital meter to check that the resistance of the stepper motor coils are simi-
lar.
• Go to wiring diagram shown in Figure
the phase pulses to GND when the component control code for the motor is entered. If
the supply and pulses are present, install a new motor.
• Check the connectors and wiring to the motor. Repair or install new wiring, as necessary.
• Disconnect PJ102. Check the +24V. If +24V is not present, check the power to the PWB.
If the power is good, install a new PWB. Check the phase pulses at the PWB. If the phase
pulses are not present at the PWB, install a new PWB.
References:
• 01H +24V Distribution RAP.
• 01L 0V Distribution RAP.
• REP 1.1 Wiring Harness Repairs.
General Procedures/Information
GP 10
1. Disconnect PJB. Check the phase pulses to
1. Disconnect T012. Check the +24V supply and
February 2013
6-40 ColorQube® 9303 Family