Ricoh G176, Service Manual

Page: 74 / 294

Service Call Conditions
G176/G177/G176L 4-4 SM
Fusing thermistor error
541 A
The fusing temperature did not rise
higher than 20
o
C within 11 sec. after
the main motor switched off.
-or-
The fusing temperature was detected
lower than 0
o
C for over 1 sec. after the
power relay switched on.
ƒ Thermistor disconnected,
defective
ƒ Fusing lamp disconnected,
defective
ƒ Fuse blown
ƒ Power supply board defective
ƒ Fusing unit connected
improperly
Fusing temperature warm-up error
542 A
Just before reaching warm-up
temperature, the fusing temperature
did not rise above 80
o
C within 17.5 sec.
after the power relay switched on.
Note:
ƒ The machine starts to test the
temperature 2 sec. after the
machine powers on if the machine
temperature is above 45
o
C.
ƒ
If the machine temperature is
below 45
o
C, the temperature is not
sampled until the machine
temperature reaches 45
o
C.
ƒ Thermistor defective
ƒ Fusing lamp open
ƒ Fusing thermostat open
ƒ Power supply board Defective
ƒ Defective connection of the
fusing unit
Fusing overheat error – software
543 A
The fusing temperature was detected
higher than 245
o
C for longer than 200
ms while the main motor was on or
within 60 sec. after the main motor
switched off. -or-
The fusing temperature was detected
higher than 235
o
C for longer than 200
ms at any other time.
ƒ Fusing thermistor defective
ƒ
Power supply board defective