Code #55 - Fusing Thermistor Open - Ricoh A151 Field Service Manual

2.13 CODE #55 — FUSING THERMISTOR OPEN
- Definition -
The temperature value output by the thermistor does not reach 2°C within 20
seconds after the main switch is turned on.
- Possible Causes -
Thermistor open
•
Defective main board
•
Defective ac drive board
•
Fusing lamp open
•
Thermoswitch open
•
Defective ac harness
•
- Action -
Is the thermistor open?
No Yes
Replace the thermistor.
Clear the service call condition.
Does the fusing lamp turn on?
No Yes
Replace the main board.
Is the fusing lamp open?
No Yes
Replace the fusing lamp.
Is the thermoswitch open?
No Yes
Replace the thermoswitch.
Is the ac harness defective?
No Yes
Replace the ac harness.
No
FSM 6-45 A151/A152