10-368 Pressure Roll Control Thermistor Failure Rap; 10-369 Pressure Roll Overheat Thermistor Failure Rap - Xerox DocuColor 12/DCCS50 Service Manual

10-368 Pressure Roll Control Thermistor Failure RAP

The Pressure Roll Control Thermistor detected an abnormal resistance value continuously for
over 1500 msec (Pressure Roll Control Thermistor disconnected).
Initial Actions
Refer to BSD 10.2 and 10.12 for the following procedure.
• Open the Drawer and extend it to the service position. Perform the following:
– Remove the Oil Cartridge (PL
– Remove the Front Cover (PL
– Remove the Top Cover (PL 8.2).
• Check the Pressure Roll Control Thermistor for cleanliness, damage and excessive wear
at the point where the Thermistor contacts the Pressure Roll. If the surface of the Ther-
mistor is worn, replace the Pressure Roll Control Thermistor
of the Pressure Roll for excessive wear due to the Thermistor. Replace the Pressure Roll
if necessary (PL 8.3).
• Check the Drawer connector P700B
mating connector on the IOT, and ensure that the mounting plate for the IOT connector is
not bent or misaligned.
Procedure
NOTE: Prior to replacing a component, disconnect the connectors to the component (Heat Roll
Control Thermistor and IOT Drive PWB). Check the connectors for broken, bent and dirty pins.
Disconnect and reconnect the connectors several times to remove contaminants due to oxida-
tion.
Switch the power off. Disconnect P/J173
the resistance between P/J173-1 and P/J173-2 on the Pressure Roll Control Thermistor. The
resistance of the Thermistor should be in the range of 0.78K Ohms when hot to 150K Ohms
when cool (room temperature). Note the measurement if it is in specification. The resistance
of the Thermistor is in specification.
Y N
NOTE: To remove the harness guard
on the guard that is located below the front cam
Replace the Pressure Roll Control Thermistor
Reconnect P/J173 to the Pressure Roll Control Thermistor. Close the Drawer. Disconnect
J413A from the IOT Drive PWB. Measure the resistance from P/J413A-13 to P/J413A-9. The
resistance measurement is the same as the measurement noted above (+/- 5%).
Y N
Go to Flag 5 on BSD 10.2. Check the harness for an open circuit.
Replace the IOT Drive PWB (PL 9.2).
Status Indicator RAPs
10-368 Pressure Roll Control Thermistor Failure RAP,
8.1).
8.1).
(PL 8.6). Inspect the surface
at the rear of the Fuser for damaged pins. Check the
on the Pressure Roll Control Thermistor. Measure
(PL 8.6) around the thermistor wires, press the tab
(PL 8.6).
(PL 8.6).

10-369 Pressure Roll Overheat Thermistor Failure RAP

The Pressure Roll Overheat Thermistor detected an abnormal resistance value continuously
for over 1500 msec (Pressure Roll Overheat Thermistor disconnected).
Initial Actions
Refer to BSD 10.2 and 10.12 for the following procedure.
• Open the Drawer and extend it to the service position. Perform the following:
– Remove the Oil Cartridge
– Remove the Front Cover
– Remove the Top Cover
• Check the Pressure Roll Overheat Thermistor for cleanliness, damage and excessive
wear at the point where the Thermistor contacts the Pressure Roll. If the surface of the
Thermistor is worn, replace the Pressure Roll Overheat Thermistor
surface of the Pressure Roll for excessive wear due to the Thermistor. Replace the Pres-
sure Roll if necessary (PL
• Check the Drawer connector
Procedure
NOTE: Prior to replacing a component, disconnect the connectors to the component (Pressure
Roll Overheat Thermistor and IOT Drive PWB). Check the connectors for broken, bent and
dirty pins. Disconnect and reconnect the connectors several times to remove contaminants
due to oxidation.
Switch the power off. Disconnect
the resistance between P/J174-1 and P/J174-2 on the Pressure Roll Overheat Thermistor.
The resistance of the Thermistor should be in the range of 0.78K Ohms when hot to 150K
Ohms when cool (room temperature). Note the measurement if it is in specification. The
resistance of the Thermistor is in specification.
Y N
NOTE: To remove the harness guard
on the guard that is located below the front cam
Replace the Pressure Roll Overheat Thermistor
Reconnect P/J174 to the Pressure Roll Overheat Thermistor. Close the Drawer. Disconnect
P/J413A from the IOT Drive PWB. Measure the resistance from P/J413A-13 to P/J413A-10.
The resistance measurement is the same as the measurement noted above (+/- 5%).
P/ Y N
Go to Flag 4 on BSD 10.2. Check the harness for an open circuit.
Replace the IOT Drive PWB (PL
1/05
2-162
manuals4you.com manuals4you.com
(PL 8.1).
(PL 8.1).
(PL 8.2).
8.3).
P700B at the rear of the Fuser for damaged pins.
P/J174 on the Pressure Roll Overheat Thermistor. Measure
(PL 8.6) around the thermistor wires, press the tab
(PL 8.6).
(PL 8.6).
9.2).
DocuColor 12/DCCS50
(PL 8.6). Inspect the
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