Konica Minolta bizhub 500 Service Manual page 630

Field Service Ver1.0 Feb.2006
Classification Code
Fusing C-3808
low
temper-
ature
abnor-
mality
Fusing C-3901
sensor
abnor-
mality
C-3902
C-3903
C-3904
Causes
Fusing sub sensor high tempera-
ture abnormality (sub CPU detec-
tion)
In the sub CPU, the thermistor /2
(TH2) detects a temperature
higher than 236 °C for more than
a specified period of time.
Inferior contact of the thermistor
/1 (TH1)
While in the warm-up condition,
when the thermistor /2 (TH2)
detection temperature gets to the
Ready temperature before the
TH1 detection temperature, the
TH1 detection temperature does
not get to the Ready temperature
a specified period of time after
the TH2 detection temperature
got to the Ready temperature.
Inferior contact of the thermistor
/2 (TH2)
While in the warm-up condition,
when the thermistor /1 (TH1)
detection temperature gets to the
Ready temperature before the
TH2 detection temperature, the
TH2 detection temperature does
not get to the Ready temperature
a specified period of time after
the TH1 detection temperature
got to the Ready temperature.
Thermistor /1 (TH1) open abnor-
mality (sub CPU detection)
In the sub CPU, the TH1 detec-
tion temperature detects a tem-
perature between -8 and 20 °C
for more than a specified period
of time.
Thermistor /2 (TH2) open abnor-
mality (sub CPU detection)
In the sub CPU, the TH2 detec-
tion temperature detects a tem-
perature between -8 and 20 °C
for more than a specified period
of time.
13. MALFUNCTION CODE
Resulting Estimated abnormal parts
operation
The main body Thermistor /2 (TH2)
stops immedi- Printer control board (PRCB)
ately to turn OFF
the main relay
(RL1). All the
keys are not
taken in.
Thermistor /1 (TH1)
Printer control board (PRCB)
Thermistor /2 (TH2)
Printer control board (PRCB)
Thermistor /1 (TH1)
Printer control board (PRCB)
Thermistor /2 (TH2)
Printer control board (PRCB)
297