Self Diagnosis; Viii. Self Diagnosis - Canon NP6251 Service Manual

VIII. SELF DIAGNOSIS

The microprocessor on the machine's DC controller PCB is equipped with a
mechanism that checks the condition of the machine (of its sensors, in particular), and
indicates an error code when it detects a fault.
A. Copier
Code
• Main thermistor (TH1; poor contact,
open circuit)
• Fixing heater (H1, H2; open circuit)
E000
• SSR (fault)
• DC controller PCB (fault)
(Note 1)
• Sub thermistor (HH2; poor contact
or open circuit; the power will turn
off in about 5 sec after indication)
• Main thermistor (TH1; short circuit)
• SSR (fault)
E001
• DC controller PCB (fault)
• Sub thermistor (TH2; error
temperature increase)
• Main thermistor (TH1; poor contact,
open circuit)
• Fixing heater (H1, H2)
E002
• Thermal switch (TS1; open circuit)
• SSR (fault)
• DC controller PCB (fault)
• Main thermistor (TH1; poor contact)
• Fixing heater (H1, H2; open circuit)
E003
• Thermal switch (TS1; open circuit)
• SSR (fault)
• DC controller PCB (fault)
• SSR (fault)
E004
• DC controller PCB (fault)
• Cleaning belt for the fixing assembly
(taken up)
E005
• Cleaning belt sensor (PS11; fault)
• DC controller PCB (fault)
• Connector for fixing assembly (fault;
E006
rear)
• DC controller PCB (fault)
COPYRIGHT © 1997 CANON INC.
Download service manual and resetter printer at http://printer1.blogspot.com
Cause
CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 11 TROUBLESHOOTING
Description
• The temperature of the upper fixing
roller does not reach 70°C within 3
min and 30 after power-on.
• The temperature of the upper fixing
roller exceeds 230°C for 2 sec or
more.
• The temperature of the upper fixing
roller does not reach 100°C in 2 min
after it has reached 70°C.
• The temperature of the upper fixing
roller does not reach 150°C in 2 sec
or more after it has reached 100°C.
• The temperature of the upper fixing
roller is 70°C or less for 2 sec or
more after it has reached 100°C.
• The SSR used to drive the fixing
heater has a short circuit.
• The cleaning belt for the fixing
assembly has been taken up more
than specified.
• The fixing feeding assembly
became disconnected during
copying.
11-259