Printronix L5000 Series Maintenance Manual page 333

4. If the main unit feed motor is overloaded, determine what is causing the
overload. Otherwise, go to Step 5.
NOTE: This procedure will cause paper jam errors, but it should not cause Error
a. Remove all three belts from the motor, and ensure that gears are moving
b. Run the printer and check the motor with one belt installed at a time, to see if
c. If a belt causes an overload, check the mechanical parts connected to the
5. Check the main unit feed motor (with paper still loaded).
a. Remove the drive belt between the paper output roller and the scuff roller.
b. Put the positive lead of the digital multimeter on R132 (E side of Q1) on the
c. Turn the power ON.
d. Measure the voltage when the motor activates during power–on. If it is not
6. Check the MPU board.
a. Remove the drive belt between the paper output roller and the scuff roller.
b. Put the positive lead of the digital multimeter on TP14 (IC16/TC9142P–8)
c. Turn the power ON.
d. Measure the voltage, which should be 4 1V during main unit feed motor
e. Put the positive lead of the digital multimeter on pin 8 of IC15 (LM324) on
f.
g. Measure the voltage, which should be about 12V during main unit feed
If the voltage is not normal, replace the MPU board.
Troubleshooting
09 –– Transport Motor Fail.
freely.
an overload occurs.
motor to insure they are moving freely and not overloading the motor.
MPU board, the negative lead on the PG.
220 50mV during main unit feed motor operation, replace the motor.
on the MPU board, and the negative lead on the PG.
operation.
the MPU board, and the negative lead on the PG.
Turn the power ON.
motor operation.
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