Printronix L1024, Maintenance Manual

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13–36 Chapter 13 – Troubleshooting Guide
2] The L.V.P.S. is not supplying the 24 V to the clutch, and the
L.V.P.S. must be replaced. This is unlikely, as several other
components use 24 V, and other errors would be occurring
during the power-on self-test.
d. The paper jam error occurs after the paper moves about 1/2 inch during TOF
registration.
1) The tractor encoder signal is faulty.
a) Clean any toner or paper dust out of the encoder sensor.
b) Inspect the tractor encoder wheel for damage. Replace it if necessary.
c) The encoder sensor is faulty. Replace the tractor encoder board or the
entire tractor unit.
d) The fuser drive clutch is slipping; replace it.
e) The Engine Controller Board is faulty; replace it.
f) The encoder cable is faulty; replace it.
15 FUSER FAIL—Call Service
1. A rotation error of the pressure roller cam has occurred. There is an unfused image at the
fuser.
a. Check the operation of the pressure roller cam. Replace it if necessary.
b. Inspect the pressure roller clutch and associated wiring. Repair any wiring problems
found.
c. Replace the Fuser Sensor Board.
d. Replace the Stepper Motors Controller Board.
e. Replace the Engine Controller Board.
f. See the “General Fuser Cam Troubleshooting” section that follows.
16 FUSER FAIL—Call Service
1. The pressure roller cam did not stop, or is out of position after a stop attempt, or the sensor is
defective.
a. Check the operation of the pressure roller cam. Replace it if necessary.
b. Inspect the pressure roller clutch and associated wiring. Repair any wiring problems
found.
c. Replace the Fuser Sensor Board.
d. Replace the Stepper Motors Controller Board.
e. Replace the Engine Controller Board.
f. See the “General Fuser Cam Troubleshooting” section that follows.
17 FUSER FAIL—Call Service
1. The pressure roller cam did not start, or the sensor is defective.
a. Check the operation of the pressure roller cam. Replace it if necessary.
b. Inspect the pressure roller clutch and associated wiring. Repair any wiring problems
found.