Konica Minolta bizhub PRO 920 Service Manual page 508

13. MALFUNCTION CODE
Classification Code
Fusing SC34-01
high tem-
perature
abnor-
mality
SC34-02
SC34-03
SC34-04
Fusing SC35-01
low tem-
perature
abnor-
mality
SC35-02
Fusing SC36-01
sensor
abnor-
mality
SC36-02
476
Causes
Thermistor /1 (TH1) high temper-
ature detection (software).
TH1 detects a temperature of
210°C or above 5 times in a
specified period of time.
Thermistor /3 (TH3) high temper-
ature detection (software).
TH3 detects a temperature of
230°C or above 5 times in a
specified period of time.
Thermistor /1 (TH1) high temper-
ature detection (hardware).
An abnormal condition is
detected with the fusing error
detection signal 1.
Thermistor /3 (TH3) high temper-
ature detection (hardware). An
abnormal condition is detected
with the fusing error detection
signal 4.
Thermistor /1 (TH1) low tempera-
ture detection (software). TH1
does not get to 50°C when a
specified period of time elapses
after the main power switch
(SW1) is turned ON for the fusing
ON control.
Thermistor /3 (TH3) low tempera-
ture detection (software). TH3
does not get to 50°C when a
specified period of time elapses
after the main power switch
(SW1) is turned ON for the fusing
ON control.
Thermistor /1 (TH1) high temper-
ature detection (long time/soft-
ware). TH1 detects a temperature
of 200°C or above 30 times in a
row in a specified period of time.
Thermistor /3 (TH3) high temper-
ature detection (long time/soft-
ware). TH3 detects a temperature
of 220°C or above 30 times in a
row in a specified period of time.
Field Service Ver2.0 Aug.2005
Resulting Estimated abnormal parts
operation
The main body Printer control board
stops immedi- (PRCB)
ately to turn OFF AC drive board (ACDB)
the main relay Fusing heater lamp /1 (L2)
(RL1). Fusing heater lamp /2 (L3)
Fusing heater lamp /3 (L4)
Thermistor /1 (TH1)
Caution
Thermistor /3 (TH3)
• When SC34-
**, SC35-**
or SC36-**
(fusing tem-
perature
related
abnormali-
ties) occur,
be sure to
Printer control board
repair
(PRCB)
defective
AC drive board (ACDB)
parts before
Fusing heater lamp /1 (L2)
setting the
Fusing heater lamp /2 (L3)
software
Fusing heater lamp /3 (L4)
DIPSW3-1
Thermistor /1 (TH1)
to 0. Set-
Thermistor /2 (TH2)
ting the
Thermistor /3 (TH3)
DIPSW3-1
Thermistor /4 (TH4)
to 0 with
defective
parts not
repaired
may result
in a fire.