Intermec EasyCoder PX4i Service Manual page 247

EasyCoder PX4i and PX6 Service Manual
Description:
Media feed does not work properly.
Possible Causes and Suggested Remedies:
• Faulty stepper motor.
- Connect a replacement stepper motor to P10 on the driver board
(see Chapter 14) and perform a print or feed operation. If this motor
runs, the original stepper motor is probably damaged and needs to be
replaced (see Chapter 7.3).
• Dirty or worn platen 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. Paper dust or adhesive residue can deteriorate
the media feed function or make the media slip.
• Intermec Fingerprint instruction missing.
- Verify that a print command is actually issued in the current Intermec
Fingerprint program.
• Power Supply Unit malfunction or bad connection.
- The stepper motor could be incorrectly connected to P10 on the
driver board, or its drive circuit (U3) on the driver board could be
damaged.
- Check that all pins in the connector of the stepper motor's cable are
fully inserted.
- Measure the +24 VDC on the driver board, see Chapter 14. If there
is no power, when an attempt to print is made, the power supply unit
or driver board is probably faulty.
• CPU board confi gured for wrong printer model.
- A replacement CPU board must be confi gured for the correct printer
model after installation. Refer to Chapter 15.8.
Description:
Excessive wear of printhead.
Possible Causes and Suggested Remedies:
• Various reasons.
- Refer to Chapter 8.6 "Printhead/Precautions" for advices on how to
reduce the wear of the printhead.
Chapter 17 — Troubleshooting
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