Ricoh D127 Field Service Manual page 168

6. Troubleshooting
No.
Definition
Time out error
(On the fusing roller inactive)
NOT reaching the reload temperature in
-003 A 25 seconds after starting heater control.
(On the fusing roller active)
NOT reaching the reload temperature in
35 seconds after starting heater control.
Fusing overheat error 1
The fusing temperature detected by the
543 A
thermistor is 230°C or higher for one
second.
Fusing overheat error 2
544 A
The fusing temperature detected by the
monitor circuit is 250°C or higher.
Fusing lamp overheat error
545 A
The fusing lamp remains on for 12
seconds after starting the waiting mode.
547 Zero cross signal malfunction
166
Symptom Possible Cause
• Disconnection of Heater After
activation of the anti-overheat
device
• Defective the triac (Semiconductor
device)
• Defective the IOB control board
• Detective the BICU control board
• Defective the triac (Semiconductor
device)
• Defective the IOB control board
• Defective the BICU control board
• Uncontrollable fusing condition
• Defective thermistor
• Disconnection of Heater
• After activation of the anti-overheat
device