Xerox DocuColor 12/DCCS50 User Manual

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DocuColor 12/DCCS50
10-386 External Heat Roll Control Thermistor Over-
Status Indicator RAPs
Reissue
10-386 External Heat Roll Control Thermistor Overheat
Failure RAP
The External Heat Roll Control Thermistor detected a temperature in excess of 230° C (446° F)
on the External Heat 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 5 to 0.
Initial Actions
Refer to BSD 10.3 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 External Heat Roll Control Thermistor for cleanliness, damage, or excessive
wear at t
he point where the Thermistor contacts the External Heat Roll. If the surface of
the Thermistor is worn, replace the External Heat Roll Control Thermistor (PL 8.8).
Inspect the surface of the Heat Roll for excessive wear due to the Thermistor. Replace the
External Heat Roll if necessary (PL 8.8).
Procedure
NOTE: Prior to replacing a component, disconnect the connectors to the component (External
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 oxidation.
Ensure NVM location 777-160 is reset to 0. Switch off the power. Cheat the Front Door Inter-
lock Switch. Disconnect P/
J17
5 on the External Heat 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). The resistance is in specification.
YN
Replace the External Heat Roll Control Thermistor (PL 8.8).
Reconnect the connector. Close the Drawer. Switch on the power. The 10-386 fault is
d
ecl
ared immediately after self-test completes.
YN
Switch off the power. Check the voltage at P/
J10
5-2 on the SSR and GND. Switch on the
power. There is 0 VDC present when self-test completes.
YN
The voltage at P/
J105-2 in
creases to approximately +4.3 VDC within 12 min-
utes.
YN
Replace the IOT Drive PWB (PL 9.
2).
T
he Heater Rod remains illuminated while P/J105-2 sti
ll reads approximately
+4.3 VDC.
YN
This indicates that the problem is intermittent. Replace the External Heat Roll
Control Therm
istor (PL 8.8).
Replace the SSR (PL 9.3).
Go to Flag 7 on BSD 10.3 and check the harness for a short circuit to ground. If OK,
replace th
e IOT Drive PWB (PL 9.2).
Go to Flag 6 on BSD 10.3 and check for a short circuit to ground between P/
J175-1 and P/
J413A-11. If OK, replace the External Heat Roll Control Thermistor (PL 8.8). If the problem
continues, 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