Table of Contents
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CHAPTER 5 OPERATION TROUBLESHOOTING
21. Fixing roller heater does not operate
Cause/Problem
Procedure
area
1
Thermoswitch
2
(F1)
Heater (LA1)
3
AC line
DC controller
4
PCB
Power supply
assembly
5-14
Check
Disconnect connector J106 (3P) from the
AC driver/DC power supply PCB. Set the
meter to the 1kΩ range. Connect the leads
to J106-1 and J106-3. Does the needle
move?
Remove the fixing assembly. Connect the
leads to both ends of thermoswitch (F1).
Does the needle move?
Connect the leads to the heater terminals.
Does the needle move?
Set the meter to the 10VDC range. Con-
nect the (+) lead to J318-1 and the (-) lead
to J300-6. Switch the power ON. Is the
voltage approx. 5V?
Result
Action
Yes
Go to step 3.
No
Replace the
thermoswitch (F1).
Note:
There may be trouble
with the heater going on,
a faulty SSR, or the
thermoswitch installed
improperly, so be sure to
check after replacing the
thermoswitch (F1).
Also be sure to check for
damage to the fixing
rollers or the separation
claws.
No
Check the installation of
the heater (LA1). If it is
normal, replace the
heater.
Yes
Check the AC wiring in-
side the fixing assembly.
No
Replace the DC control-
ler PCB.
Yes
Replace the AC driver/
DC power supply PCB.
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Table of Contents
Troubleshooting
