Oki OKIPAGE 8p Maintenance Manual page 143

Flowchart of Thermistor Circuit Check
Short check timer(t16)set
No
Thermistor disconnection
t2 =
t16 =
t35 =
START
HEATER OFF
Time-out ?
Yes
Yes
Short error TEMP ?
No
Thermistor error check
timer (t2) set
check timer (t35) set
Heater On
Yes
Temperature > Tn
No
Thermistor
No
error check timer (t2)
within time
Yes
Thermistor
No
disconnection check timer
(t35) within time
Yes
90 sec
520 msec
10 sec
Thermistor short error
End
No
A/D value changed?
Yes
No
Thermistor
disconnection error
End
- 15 -
To constant
temperature control
Fuser error
End
Thermistor gain change
(THERMCMP-N"0" "Z")
A/D value more than
20H?
Yes
Fuser error
End