Service manual

7-41
CHAPTER 7 TROUBLESHOOTING PROCEDURES
(5-4)Paper path jam occurs right after reaching the fuser unit
Fuser motor
Heat roller detection
temperature
Fuser unit
Confirmation Tasks
Conduct the Motor and Clutch Test of the self-diagnostic mode,
and check to see if the fuser motor operates normally.
Make this checking in the presence and absence of a load.
Check the detection temperature of the heat rollers in the self-
diagnostic mode. Check to see if an abnormally low or high
temperature is detected.
Check to see if the fuser unit is properly installed (whether it is
pushed in to the lowest position).
Action at NG
Re place the PU PCB
(PRX PCB). Replace
the fuser motor.
Replace the fuser unit.
To use a new fuser unit
on a trial basis, use
FUSE KEEP MODE of
the System
Maintenance Menu.
Replace the fuser unit,
or replace the junction
PCB (PRY PCB) or PU
PCB (PRX PCB). To
use a new fuser unit on
a trial basis, use FUSE
KEEP MODE of the
System Maintenance
Menu.
Install the unit properly
in the printer.
(5-4-1) Check of operating state of motors
(5-4-2) Temperature control of rotating roller
(5-4-3) Check of installed state of fuser unit
Confirmation Items