Self Diagnosis; Ix. Self Diagnosis - Canon NP6320 Service Manual

CHAPTER 10 TROUBLESHOOTING

IX. SELF DIAGNOSIS

A. Self-Diagnosis
The DC controller PCB has a microprocessor that diagnoses the functions of the copier (par-
ticularly the sensors) at appropriate intervals. If this microprocessor detects an error, it will display
the type of the error on the indicator on the control panel.
The table below shows the various fault codes, their meaning, and the corresponding detection
timing.
Example of E000 code indication:
E 000 light alternately.
Code displayed
E000
E001
E010
E030
10-70
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Main cause
Thermistor (TH1), Fixing heater (H1),
Power supply PCB, DC controller
PCB or Thermoswitch (TS1).
Thermistors (TH1/TH2), Fixing
heater (H1), Power supply PCB or
DC controller PCB.
Main motor error:
Main motor (M1), DC controller
PCB
Counter, DC controller PCB
COPYRIGHT © 1999 CANON INC.
Fault criteria
•If the fixing assembly temperature is
lower than 50°C after 15 sec from
the power on. (main thermistor)
•If the warm-up is not over after 60
sec from when the temperature
reached 50°C. (main thermistor)
•If the fixing unit temperature drops
below 50°C while the copier is in
stand by or copying (main ther-
mistor)
•If the temperature remains 220°C or
higher for 0.1 sec or longer (main
thermistor)
•If the temperature difference be-
tween the main thermistor and the
auxiliary thermisor is 50°C or
higher.
•If the HTON signal is on while
HTRD signal is off.
If the main motor speed feedback
signal does not appear after 2 sec
from the main motor.
If the break signal is emitted con-
tinuously for 0.1 sec or more when
the counter is not being driven.
CANON NP6320 REV.0 DEC. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)