Xerox DocuColor 12/DCCS50 User Manual

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DocuColor 12/DCCS50
10-376 Pressure Roll Overheat Thermistor Overheat
Reissue
Status Indicator RAPs
10-376 Pressure Roll Overheat Thermistor Overheat
Failure RAP
The Pressure Roll Overheat Thermistor detected a temperature in excess of 230° C (446° F)
on the Pressure Roll.
NOTE: This status code is stored in NVM location 777-160 and cannot be
reset by Power Off/
Power On. To reset this code, enter Diagnostics and change the value in NVM location 777-
160 Fuser Over heating Failure from 4 to 0.
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 8.
1).
– Remove the Front Cover (PL 8.1).
–
Remove the Top Cover (PL 8.2).
• Check the Pressure Roll Overheat Thermistor for cleanliness, damage and excessive
wear at the p
oint where the Thermistor contacts the Pressure Roll. If the surface of the
Thermistor is worn, replace the Pressure Roll Overheat Thermistor (PL 8.6). Inspect the
surface of the Pressure Roll for excessive wear due to the Thermistor. Replace the Pres-
sure Roll if necessary (PL
8.
3).
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.
Ensure NVM location 777-160 is reset to 0. Switch off the power. Cheat the Front Door Inter-
lock Switch. Disconnect P/
J174 on t
he 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). The resistance is in specification.
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Replace the Pressure Roll Overheat Thermistor (PL 8.6).
NOTE
: To remove the harness guard (PL 8.
6) around the thermistor wires, press the tab
on the guard that is located below the front cam (PL 8.6).
Reconnect the connector. Close the Drawer. Switch on the power. The 10-376 fault is
decl
ared immediately after self-test completes.
YN
Switch off the power. Check the voltage at P/
J10
5-3 on the SSR and GND. Switch on the
power. There is 0 VDC present when self-test completes.
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The voltage at P/
J105-3 in
creases to approximately +4.3 VDC within 12 min-
utes.
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Replace the IOT Drive PWB (PL 9.
2).
T
he Heater Rod remains illuminated while P/J105-3 sti
ll reads approximately
+4.3 VDC.
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This indicates that the problem is intermittent. Replace the Pressure Roll Over-
heat Thermistor (PL
8.
6).
Replace the SSR (PL 9.3).
Go to Flag 7 (Fl
ag 17 w/ Tag P31) on BSD 10.2 and check the harness for a short circuit
to ground. If OK, replace the IOT Drive PWB (PL 9.2).
Go to Flag 4 on BSD 10.2 and check for a short circuit to ground between P/
J174-1 and P/
J413A-10. If OK, replace the Pressure Roll Overheat Thermistor (PL 8.6). If the problem con-
tinues, replace the IOT Drive PWB (PL 9.
2).
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Xerox DocuColor 12/DCCS50 Specifications

General

Brand	Xerox
Model	DocuColor 12/DCCS50
Category	All in One Printer
Language	English