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OPERATIONS AND TIMING
COPYRIGHT
©
1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
VII.SELF DIAGNOSIS
The microprocessor on the machine’s DC con-
troller is provided with a self diagnosis mechanism
which checks the condition of the machine (sensors
in particular) and indicates a code to identify the
error it detects.
Detecting an error associated with ‘E000’ will
automatically turn OFF the power. (error auto power-
off)
A. Copier Self Diagnosis
Possible cause
• Thermistor (TH1; displacement,
poor contact, short circuit)
• Fixing heater (H1; open circuit,
cracking)
• Thermal fuse (FU1; malfunction)
• DC controller (faulty)
• Thermistor (TH1; short circuit)
• Triac (faulty)
• DC controller (faulty)
• Thermistor (TH1; displacement,
poor contact, open circuit)
• Fixing heater (H1; open circuit,
cracking)
• Thermal fuse (FU1; activation)
• Triac (faulty)
• DC controller (faulty)
• Thermistor (TH1; displacement,
poor contact)
• Fixing heater (H1; open circuit,
cracking)
• Thermal fuse (FU1; activation)
• Triac (faulty)
• DC controller (faulty)
• Triac (faulty)
• Heater ON PCB (faulty)
• Main motor (M1; faulty)
• DC controller (faulty)
• Counter (open circuit)
• DC controller (faulty)
• Deck motor (M1dk; faulty)
• Deck lifter clutch (CL4dk; faulty)
• Lifter sensor (PS3dk; faulty)
Code Description
• The detection temperature of the main
thermistor (TH1) does not reach 50°C 15 sec
after a press on the Copy Start key.
• The detection temperature of the main
thermistor (TH1) exceeds 225°C during
copying or stand-by.
• The detection temperature of the main
thermistor (TH1) does not reach 155°C 25
sec after it has reached 50°C during copying.
• The detection temperature of the main
thermistor (TH1) is less than 50°C after it has
reached 155°C during copying.
The activation of fixing heater (HTON=1) is
detected when the fixing heater drive signal is
OFF (HTRD=0).
The revolution of the main motor deviates from
the specified value (MLOCK=0) for 1 sec or
more while the main motor drive signal remains
ON (MMD=1).
A check is made immediately before the
counter turns ON or OFF and when starting the
count.
Normal if the drive signal is ‘0’ when the
counter turns ON. Normal if the drive signal is
‘0’ when the counter is OFF.
Note: The check is made only if the counter is
installed.
The lifter does not reach the lifter sensor
(PS3dk) within 40 sec after the deck lifter
clutch (CL4dk) has turned ON.
E000
E001
E002
E003
E004
E010
E030
E041