Self Diagnosis - Canon NP6512 Service Manual

CHAPTER 11 TROUBLESHOOTING
VIII. SELF DIAGNOSIS
The microprocessor on the machine's DC controller PCB is equipped with a self diagnostic
mechanism that checks the condition of the machine (particularly, sensors) and indicates an error
code in the count/ratio indicator on the control panel upon detection of a fault.
In the case of 'E001', 'E0' and '01' are flashed alternately.
Code
• The thermistor (TH1) is faulty.
• The fixing heater (H1) is faulty.
• The thermal fuse (FU2) has blown.
• The DC controller PCB is faulty.
• The composite power supply PCB is
• The thermistor (TH1) is faulty.
• The DC controller PCB is faulty.
• The composite power supply PCB is
• The thermistor (TH1) is faulty.
• The fixing heater (H1) is faulty.
• The thermal fuse (FU2) has blown.
• The DC controller PCB is faulty.
• The composite power supply PCB is
• The thermistor (TH1) is faulty.
• The fixing heater (H1) is faulty.
• The thermal fuse (FU2) has blown.
• The DC controller PCB is faulty.
• The composite power supply PCB is
• The main motor (M1) is fault.
• The DC controller PCB is faulty.
• The counter has an open circuit.
11-94
COPYRIGHT © 1999 CANON INC.
Cause
faulty.
faulty.
faulty.
faulty.
CANON NP6512/6612/7120/7130/7130F REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Description
• The temperature detected by the
thermistor (TH1) does not reach 65°C
1.5 sec after the Copy Start key has
been pressed.
• The temperature detected by the
thermistor (TH1) does not reach 150°C
4 sec after the Copy Start key has been
pressed.
• The temperature detected by the
thermistor (TH1) exceeds 230°C.
• The temperature detected by the
thermistor (TH1) exceeds by 30°C or
more.
• The temperature detected by the
thermistor (TH1) registers an increase
of 100°C or more within 1 sec.
• The temperature detected by the
thermistor (TH1) registers an increase
of 40°C or more after it has reached
100°C during standby.
• The temperature detected by the
thermistor (TH1) has exeeded 150°C
during copy operation and maximum
power is applied for 10 to 14 sec
thereafter.
• The temperature detected by the
thermistor (TH1) drops to and remains
150°C or lower after it has reached
160°C.
• The rotation of the main motor deviates
(indicated by MLOCK=0) for 1 sec or
more while the main motor drive signal
(MMD=1) is being generated.
• The counter drive signal is not generated
when the counter is driven.
• The counter drive signal is not '0' when
the counter is not driven.