E001 - Canon NP6251 Service Manual

CHAPTER 11 TROUBLESHOOTING
Cause Step
Environment 6
Main thermistor 7
(TH1)
DC controller
PCB

2. E001

Cause Step
1
Thermistor 2
(TH1/TH2)
DC controller
PCB
AC driver
3
DC controller
PCB
11-86
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Checks
Does the problem occur only
when the machine is turned on for
the first time in the morning?
Replace the thermistor. Is the
problem corrected?
Checks
Execute 'ERROR' in service mode
( ), and open the front door
4
and the delivery assembly to cool
the fixing roller. Is 'E001' indicated
immediately after power-on when
the power switch is turned on?
Turn off the power switch, and
slide out the fixing feeding
assembly. Disconnect the relay
connector J2757 from inside the
fixing unit, and set the meter to
the 1KΩ range. Connect the probe
to the terminal of the harness on
the thermistor side. Is the reading
about 0Ω at this time? (After the
check, be sure to connect J2757.)
Replace the AC driver. Is the
problem corrected?
CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
YES/NO Action
YES •Advise the user that the
site is out of
specification.
•Advise the user not to
turn on the machine
until the room is warm
enough.
YES End.
NO Replace the DC
controller PCB.
YES/NO Action
NO Go to step 3.
YES Replace the thermistor.
NO Replace the DC
controller PCB.
YES
End.
NO
Check the wiring from
the AC drive to the DC
controller; if normal,
replace the DC controller
PCB.