Xerox DocuColor 1632

6/02
2-183
DC1632/2240
10-350
Status Indicator RAPs
Prelaunch Training/Review
10-350 Sub Heater Over Heat
The Rear Thermistor detected an over heat condition.
Procedure
NOTE: To clear this fault, re-set the value of dC131 [744-003] to "0".
Turn off the power, remove the Fuser Assembly and allow it to cool down.
Measure the resistance between P/J600-7 and P/J600-9 on the Fuser Assembly.
The resistance is between 30 and 190 K Ohmís.
YN
Check the Rear Thermistor for an open circuit and poor contact. If the check is OK,
replace the Sensor Assembly (PL 7.2).
Reinstall the Fuser Assembly, turn the power ON. Enter dC140 [010-101] and press Start. The
display value is between 676 and 699.
YN
Turn the power off. Check for an open or poor connection between P/J404-14 and P/J404-
13 on the MCU PWB (PL 13.1). If the check is OK, replace the MCU PWB (PL 13.1).
There is +3.4VDC measured at P/J404-7 on the MCU PWB (PL 13.1).
YN
Replace the MCU PWB (PL 13.1).
Check the wires and connectors. If the check is OK, replace the AC Drive PWB (PL 9.2).
Figure 1 Fuser Front and Rear Thermistor CD
Figure 2 Fuser Main Heater and Sub Heater CD
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