Transport Motor Fail (Complete Stop) - Printronix L5000 Series Maintenance Manual

09 – Transport Motor Fail (complete stop)
1. Ensure that the main unit feed motor operates during power–on.
If the motor is operating properly, go to Step 2. Otherwise, go to "Speed
Precision Abnormality" on page 7–42.
2. Check the fuse.
a. Put the lead rods of the digital multimeter on either side of F1
b. Measure the resistance, which should be 0Ω (the fuse is not blown).
If the fuse is blown, replace the MPU board.
3. Check the main unit feed motor.
a. Remove the terminal connector of the main unit feed motor.
b. Put the positive lead of the digital multimeter on the positive terminal
c. Turn the power ON.
d. Measure the voltage. If it is not about 24V during main unit feed motor
4. Check the MPU board.
a. Put the positive lead of the digital multimeter on pin 1 of CN1 on the MPU
b. Measure the voltage. If it is not 24V, replace the MPU board.
Troubleshooting
CHECKLIST: MAIN UNIT FEED MOTOR
FUSE (F1)
MPU BOARD
CONTROL CIRCUIT
(fuse 1) on the MPU board.
connector (left–side of motor), and the negative lead on the negative terminal
connector (top–side of motor).
operation, replace the motor.
board, and the negative lead on the PG.
7–41