Canon MF6530 Service Manual - Page 128
c. Detection of Drive circuit failure zero-cross error - page count
UPC - 013803056037
View all Canon MF6530 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 128 highlights
Chapter 8 a. Detection of thtermistor short circuit (excessively high temperature) This failure is detected when the main thermistor has continuously detected a temperature equal to or higher than 235 deg C for 1 second or longer during temperature control. This failure is detected when the sub-thermistor has continuously detected a temperature equal to or higher than 300 deg C for 0.15 second or longer during temperature control. b. Detection of open thermistor (excessively low temperature) This failure is detected when the main thermistor has continuously detected a temperature lower than 20 deg C for 0.5 second or longer during temperature control. This failure is detected when the sub thermistor has continuously detected a temperature lower than 35 deg C for 0.15 second or longer after the end of start up. This failure is detected when the sub-thermistor cannot detect a temperature equal to or higher than 75deg C even if 2.29 to 20 seconds have lapsed since start of power supply to the fixing heater. c. Detection of Drive circuit failure (zero-cross error) This failure is detected when the number (cycle) of zero-cross inputs that have been counted every second has been outside the range (45-65 Hz) twice. d. Detection of startup failure This failure is detected when the main thermistor has detected a temperature lower than 45 deg C 2.29 seconds after start of power supply to the fixing heater. This failure is also detected when the main thermistor temperature is lower than 150 deg C and the rise in the main temperature per second is less than 12 deg C or when the main thermistor temperature does not reach the target value 20 seconds later. 8-4