Canon NP6012 Service Manual page 147

TE OPERATIONS AO 000 CS
Cause
Description
* Thermistor (TH1, TH2; faulty)
* Triac (faulty)
* DC controller PCB (faulty)
* Thermistor (TH1; faulty)
+ Fixing heater (H1; faulty)
* Thermal fuse (FU1; melting)
* Triac (faulty)
* OC controller PCB (faulty)
* The thermistor (TH1) temperature
exceeds 245°C during copying
operation.
* The thermistor (TH1) temperature
exceeds the control temperature by
30°C after a press on the Copy Start
key.
* The thermistor (TH2) temperature
exceeds 275°C during copying
operation.
* The thermistor (TH1) detects a
temperature increase of 100°C or more
within 1 sec.
* The thermistor (TH1) detects a
temperature increase of 40°C or more
during standby after it has reached
100°C.
* The thermistor detects a temperature
increase of 40°C after it has reached
130°C,
(Note 1)
* The temperature detected by the
thermistor (TH1) has exceeded 150°C
during copying operation and maximum
power is applied for 10 to 14 sec
thereafter.
(Note 1)
* Thermistor (TH1; faulty)
* Fixing heater (H1; faulty)
* Thermal fuse (FU1; melting)
* Triac (faulty)
* DC controller PCB (faulty)
* Fixing heater film (displaced, torn)
¢ Main motor (M1; faulty)
¢ DC controller PCB (faulty)
¢ The thermistor (TH1) temperature
exceeds 190°C during copying and then
drops 170°C or less for 0.1 sec or more.
(Note 1)
* The output of the fixing film displacement
sensor (PS5; '1') continues 100 ms or
more while the main motor (M1) is
operating.
* The fixing film cannot be corrected for
displacement when fixing film
displacement correction mode is
executed at power-on.
* The revolution of the main motor deviates
from the specification for 1 sec or more
while the main motor drive signal
(MMD=1) is being generated, i.e.,
remains MLOCK=0.
* Counter (open circuit)
¢ DC controller PCB (faulty)
3-102 COPYRIGHT © 1995 CANONINC.
* The counter drive signal is not '1' when
the counter operater.
* The counter drive signal is not '0' when
the counter is at rest.
CANON NP6OT2/NPSOI2F/NP6212 REV.1 SEPT. 1905 PRINTED IN JAPAN (IMPRIME AU JAPON)