1. In service mode > COPIER > DISPLAY > ANALOG, check
the temperature displayed next to the following items:
With the fixing feeder assembly pulled out, make sure that the
temperatures are as follows:
- FIX-U: 20 deg. C
- FIX-UE: 8 deg. C
- FIX-SHTR: 8 deg. C
If any of them is 230 deg. C or higher, the main body may have
a defective part (D-CON, cable, etc); To put it the other way
around, it is unlikely that the upper fixing unit is faulty.
Note: It’s relatively rare but a fault in the upper fixing unit causes
the DC controller to go out of order.
2. With the fixing feeder assembly set, check the temperature of
the following item in service mode > COPIER > DISPLAY > ANALOG,
[FIX-U, FIX-UE, and FIX-SHTR]
If any of them is 230 deg. C or more (*), a short-circuit may occur with
the corresponding thermistor / fixing feeder cable.
* If the fixing assembly has cooled completely, the temperature will be
same as the room temperature. If the measurement is performed
right after the assembly is heated, the temperature will become 50
to 200 deg C.
If the temperatures do not change even though the fixing feeder assembly
is pulled out and then inserted again, the following are conceivable:
- The thermistor has an open-circuit.
- The fixing feeder assembly cable is broken.
- The DC controller is faulty.
- A cable of the main body is broken.