Paper Empty (Fan–Fold Paper): When Loading/Beginning Print - Printronix L5000 Series Maintenance Manual

02–Paper Empty (fan–fold paper): When Loading/Beginning Print
1. Ensure that the fan–fold paper is loaded properly on the tractors.
2. Check the PBFS (paper back feed sensor).
a. Put the positive lead of the digital multimeter on pin 8 of CN34 on the I/O
b. Measure the voltage, which should be about 3V with PBFS blocked, when
c. Remove the paper.
d. Measure the voltage between the pins, which should be about 0V when paper
If voltage is not normal, replace the PBFS sensor after checking the harness.
3. Check the tractor position. If necessary, move it. The left tractor should be locked
in the complete left position.
4. Check the I/O board.
a. Verify that the paper moves into the printer.
b. Using the printer control panel or the engine checker, run paper through the
c. If there are problems, check the tractors, belts, and I/O board.
If voltage is not normal, replace the I/O board. (Refer to Chapter 9, "Board
Adjustments.")
Troubleshooting
CHECKLIST: TRACTOR
PAPER BACK FEED SENSOR (PBFS)
I/O BOARD
TRACTOR MOTOR
board, and the negative lead on the SG.
on.
is removed.
printer and verify that no faults occur.
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