Media Feed Does Not Work Properly - Intermec EasyCoder 501 XP Service Manual

Chapter 17 Troubleshooting
17.12 Printing Trou-
bles, cont.
188
Description:

Media feed does not work properly.

Possible Causes and Suggested Remedies:
• Faulty stepper motor.
- Connect a working stepper motor, for example the one in
the optional liner/batch takeup unit, to P420 and perform a
PRINTFEED or FORMFEED operation. If this motor runs,
the original media feed stepper motor is probably damaged.
• Dirty or worn pressing roller.
- Inspect the platen roller for visible wear. Replace if necessary
(see Chapter 8.2.)
- Clean the platen roller using a cleaning card or a soft cloth
moistened with isopropyl alcohol. Dust or adhesive residue
can deteriorate the media feed function or make the media
slip.
• Wrong belt tension.
- Check the tension of the belt that drives the platen roller and
adjust as explained in Chapter 8.5.
• Intermec Fingerprint instruction missing.
- Verify that a print command is actually issued in the current
Intermec Fingerprint program.
• CPU board malfunction or bad connection.
- Move the cable from P420 to P421 on the CPU board and
perform a PRINTFEED or FORMFEED. If the stepper motor
works now, the problem is probably on the CPU board.
- The media feed stepper motor could be incorrectly connected
(P420), or its drive circuits, IC422 and IC423 on the CPU
board could be damaged.
- Check that all pins in the connector of the stepper motor's
cable are fully inserted.
• Power supply malfunction.
- Check the voltage on test point V40 on the CPU board, see
Chapter 15.5. If V40 is not +42V ±10%, the power supply
unit is probably faulty.
Intermec EasyCoder 501 XP & 601 XP – Service Manual