Printronix L1024, Maintenance Manual

Page: 306 / 372

13–34 Chapter 13 – Troubleshooting Guide
b] The fuser drive gear in the pulley assembly is turning,
but the fuser drive gear on the fuser is not turning.
The fuser drive gear must be replaced.
c] The gear on the fuser roller is turning, but the roller is
not turning. This indicates that the engagement teeth
on the gear are broken, and the fuser roller gear must
be replaced.
2] The drive belt is not turning the drive pulley.
a] The drive belt is slipping on the fuser pulley. If this is
happening, there should be excessive noise coming
from the pulley and belt as the slipping occurs.
1} The belt tensioner spring is weak and must be replaced.
2} The pulley teeth are worn and the pulley assembly must be replaced.
3} The drive belt teeth are worn and the belt must be replaced.
b) The drive belt is not turning, but the main gear assembly is turning.
1] The electric clutch assembly is turning, but the drive belt is
not.
a] The belt tensioner spring is loose and the belt is not
being driven. Replace the belt tensioner spring.
b] The teeth on the electric clutch pulley are worn and
the electric clutch must be replaced.
c] The drive belt is worn and must be replaced.
3) The pressure roller is not turning.
a) A foreign object is rubbing on the pressure roller or touching it. The
foreign object must be removed and the roller inspected for damage.
If the foreign object cannot be removed or the roller is damaged, the
fuser unit must be replaced.
b) The bearings on the pressure roller are worn. The entire fuser unit
must be replaced.
4) The rollers in the fuser are turning. The paper jam error occurs after the printer
has been operating for a prolonged period of time. There is an upward bow
present in the paper when the printer is stopped during the print process.
a) The drive belt is slipping.
1] The belt tensioner spring is loose and the belt is slipping.
Replace the belt tensioner spring.
2] The teeth on the clutch pulley are worn and the electric clutch
must be replaced.
3] The drive belt is worn and must be replaced.
b) The fuser rollers are worn to a much smaller diameter than when they
were new. The fuser can no longer pull the paper through the printer
at a rate that is faster than the tractor. The entire fuser must be
replaced.
2. Paper jam errors, but no jam visible.
This section deals with paper jam errors where error messages are being displayed but there
is no visible paper jam. If a paper jam is visible, see the section on page 13–32.
a. The following paper jam errors occur after the printer has passed its power-on self-test
and is ready for a print job. This will be evident by the READY light on the LCD Control
Panel being illuminated.