Ricoh D127 Service Manual page 177

No.
Definition
Time out error
(On the fusing roller inactive)
NOT reaching the reload
temperature in 25 seconds after
-003 A 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
543 A
the thermistor is 230°C or higher for
one second.
Fusing overheat error 2
The fusing temperature detected by
544 A
the monitor circuit is 250°C or
higher.
Fusing lamp overheat error
The fusing lamp remains on for 12
545 A
seconds after starting the waiting
mode.
547 Zero cross signal malfunction
-001 B Detecting fusing contact meltdown
SM
Symptom
6-11
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

Defective the fusing relay
SC Tables
D127/D128