Xerox WorkCentre 5022 Service Manual page 49

010-311 Fusing Unit Center Thermistor Defect
BSD-ON: CH10.2
An open circuit abnormality (the AD value of the STS is equivalent to the open circuit value) of
the Heat Roll Center Thermistor was detected.
Procedure
Turn OFF the power and disconnect the Heat Roll Center Thermistor connector P/J600. Mea-
sure the resistance between the Heat Roll Center Thermistor J600 pin-1 and J600 pin-2. Is
the resistance infinite?
Y N
Reconnect the connector P/J600 and measure the resistance between the ESS/MCU
PWB J403 pin-1 and J403 pin-2. Is the resistance infinite?
Y N
Replace the ESS/MCU PWB (PL 18.3).
Check the following connections for open circuits and poor contacts.
• Between ESS/MCU PWB J403-1 and Heat Roll Center Thermistor P600-4
• Between ESS/MCU PWB J403-2 and Heat Roll Center Thermistor P600-3
Replace the Fusing Unit. (PL 7.1)
Version 1.0
WC 5022/5024
010-312 Fusing Unit Rear Thermistor Defect
BSD-ON: CH10.2
An open circuit abnormality (the AD value of the STS is equivalent to the open circuit value) of
the Heat Roll Rear Thermistor was detected.
Procedure
Turn OFF the power and disconnect the Heat Roll Rear Thermistor connector P/J600. Mea-
sure the resistance between the Heat Roll Rear Thermistor J600 pin-3 and J600 pin-4. Is the
resistance infinite?
Y N
Reconnect the connector P/J600 and measure the resistance between the ESS/MCU
PWB J403 pin-3 and J403 pin-4. Is the resistance infinite?
Y N
Replace the ESS/MCU PWB (PL 18.3).
Check the following connections for open circuits and poor contacts.
• Between ESS/MCU PWB J403-3 and Heat Roll Rear Thermistor P600-2
• Between ESS/MCU PWB J403-4 and Heat Roll Rear Thermistor P600-1
Replace the Fusing Unit. (PL 7.1)
06/2014
010-311 Fusing Unit Center Thermistor Defect
2-27
Status Indicator RAPs