Printronix L5000 Series Maintenance Manual page 335

5. Check the motor driver power.
a. Remove CN1 on the MPU board.
b. Put the positive lead of the digital multimeter on pin 5 of CN1, and the
c. Power ON the printer.
d. Measure the voltage, which should be about 0V.
e. Put the positive lead of the digital multimeter on pin 6 of CN1, and the
f.
If voltage is not normal, replace the MPU board.
6. Check the MPU board.
a. Put the positive lead of the digital multimeter on pin 5 of CN1, and the
b. Power ON the printer.
c. Measure the voltage, which should be about 24V, with cutter action driven
d. Put the positive lead of the digital multimeter on pin 6 of CN1, and the
e. Measure the voltage, which should be about 24V, with cutter action driven
If voltage is not normal, replace the MPU board.
7. Check the cutter motor.
a. Connect CN1 on the MPU board.
b. Does the cutter motor move the cutter from the front side to the rear side
c. Does the cutter motor move the cutter from the rear side to the front side
If the cutter does not move the entire distance across the cutting area, replace the
cutter motor. If the cutter does not stop, replace the MPU board.
Troubleshooting
negative lead on the PG.
negative lead on the PG.
Measure the voltage, which should be about 0V.
negative lead on the PG.
from the front side to the rear side.
negative lead on the PG.
from the rear side to the front side.
(reciprocating movement)? After moving, does the cutter stop at the rear
side?
(reciprocating movement)? After moving, does the cutter stop at the front
side?
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