Printronix L5000 Series Maintenance Manual page 345

e. Manually turn the tractor motor shaft in a reverse direction to apply the load.
f.
g. Stop the tractor motor.
Tractor motor adjustment (forward):
a. Drive the tractor motor forward.
b. Adjust VR2 so that LED3 and LED4 on the I/O board have the same
c. Stop the tractor motor.
Tractor motor adjustment (reverse):
a. Drive the tractor motor in reverse.
b. Adjust VR3 so that LED4 and LED5 on the I/O board have the same
c. Stop the tractor motor.
7. Check the I/O board. Determine if the motor axis vibrates in detent condition. If
vibration occurs, replace the I/O board.
Troubleshooting
Adjust VR1 so the digital multimeter reads 200mV
brightness.
brightness.
20mV.
7–55