Canon FY8-13EX-000, NP6218 service manual VIII. Self Diagnosis, 10-109

CHAPTER 10 TROUBLESHOOTING

VIII. SELF DIAGNOSIS

A. Copier

The microprocessor on the copier’s DC controller is provided with a self diagnosis mechanism that checks the condition of the machine (sensors, in particular). The copier runs self diagnosis and, when it identifies an error, indicates a code that represents each specific error. If the copier finds an error associated with E000, E001, E002, E003, and E004, it automatically shuts itself off (error auto power-off).

Code	Cause	Description
	• Thermistor (TH1, TH2;	• Beginning 1 second after the copy START key
	displacement, poor	is pressed, the main thermister (TH1) does
	contact, open circuit)	not reach 50°C for 200 ms.
E000	• Fixing heater (H1; open	• Beginning 2 second after the copy START key
	circuit, crack)	is pressed, the main thermister (TH1) does
	• Thermal fuse (FU1;	not reach 60°C for 200 ms.
	malfunction)	• Beginning 4 second after the copy START key
	• Triac (faulty)	is pressed, the main thermister (TH1) does
	• DC controller (faulty)	not reach 70°C for 200 ms.
	• Thermistor (TH1, TH2;	• The detection temperature of the thermistor
	short circuit)	(TH1) exceeds 250°C during copying operation.
	• Triac (faulty)	• The detection temperature of the sub
	• DC controller (faulty)	thermistor (TH2) exceeds 260°C during
		copying operation.
		• The detection temperature of the thermistor
E001		(TH1, TH2) rises 30°C over the specified
		temperature during copying operation.
		• The detection temperature of the thermistor
		(TH1, TH2) rises 30°C over the specified
		temperature during copying operation.
		• The thermistor detects a rise in temperature of
		40°C or more during standby.
		• The temperature has increased over 100°C or
		more within 1 sec after the thermistor (TH1,
		TH2) has detected 100°C.
	• Thermistor (TH1, TH2;	• Beginning 1 second after the main thermister
	displacement, poor	(TH1) detection temperature reaches 60°C, the
	contact, open circuit)	first thermister does not reach 70°C for 200 ms.
	• Fixing heater (H1; open	• Beginning 1 second after the main thermister
E002	circuit, crack)	(TH1) detection temperature reaches 70°C, the
	• Thermal fuse (FU1;	first thermister does not reach 80°C for 200 ms.
	malfunction)	• Beginning 1 second after the main thermister
	• Triac (faulty)	(TH1) detection temperature reaches 80°C, the
	• DC controller (faulty)	first thermister does not reach 90°C for 200 ms.
		• Beginning 1 second after the main thermister
		(TH1) detection temperature reaches 90°C, the
		first thermister does not reach 95°C for 200 ms.

Table 10-19-1

COPYRIGHT © 1997 CANON INC. CANON NP6218 REV. 0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) 10-109