Canon PC1000s Service Manual page 184

CHAPTER 4 OPERATION
a. Overheating 1 (all conditions)
The CPU will identify overheating 1 if the main thermistor detects 230°C/446"F for 1 sec
or more continuously.
b. Start-Up Error 1 (start-up)
The CPU will identify start-up error 1 if a level of temperature lower than 120°U248"F is
detected for 1 see or more continuously 10 sec after the heater is supplied with power.
c. Start-Up Error 2 (startuplpaper passage)
The CPU will identify start-up error 2 if a level of temperature 15"C/59"F lower than the
paper passage temperature control target is not detected at all 75 see after the heater is sup-
plied with power.
d.Temperature Control Low Temperature Error (paper passagelsheet-to-sheetlrest
heatingltemperature control)
The CPU will identify a temperature control low condition error if a level of temperature
lower than 120°C/248"F is detected for 1 sec or more continuously in paper passage, sheet-
to-sheet, rest heating, or temperature control state.
e. Main thermistor Open Circuit (all conditions)
The CPU will identify main thermistor open circuit if the AID conversion value of the
output voltage from the main thermistor is in excess of a specific value for 1 sec or more.
f. Overheating 2 (all conditions)
The CPU will identify overheating 2 if the sub thermistor detects 300°U572"F or higher
for 0.2 sec over more continuously.
g. Sub Thermistor Error Low Temperature 1 (warm-up)
The CPU will identify sub thermistor error low temperature 1 if the temperature reading is
lower than 75OC1167"F for
1
sec or more 10 sec after the heater is first supplied with power.
h. Sub Thermistor Error Low Temperature 2 (cool-down)
The CPU will identify sub thermistor error low temperature 2 if all the following condi-
tions exit when the heater is off after printing ends and the trailing edge of the paper moves
past the delivery sensor.
the thermistor reading is lower than 75OU167"F when the heater is off.
printing has not been cancelled in the middle.
no error has occurred during printing.
the thermistor reading is lower than 75°C/1670F before the trailing edge of the paper
moves past the delivery sensor.
COPYRIGHT 0 2002 CANON INC. CANON PC1000slimageCLAS.S D600s REV.
1
AUG. 2002