Xerox WorkCentre 4150 Service Manual page 103

10-100, 200 Open Fuser Error/Low Heat Error RAP
10-100 During normal operation, the temperature of the fuser has dropped below the operating
level.
10-200 The fuser has failed to reach the correct operating temperature.
Procedure
WARNING
Switch off the electricity to the machine. Disconnect the power cord from the customer
supply while performing tasks that do not need electricity. Electricity can cause death or
injury. Moving parts can cause injury.
WARNING
Do not touch the fuser while it is hot.
NOTE: The main PWB has 4 test points, GND, +3.3V, +5V and +24V. The location of the test
points is shown on the Main PWB PJ location illustration.
Refer to Wiring Diagram 1, Wiring Diagram 2 and Wiring Diagram 4. Perform the following:
1. Switch off the machine, then switch on the machine.
2. Enter dC330 code 10-100 to heat the fuser to 180 degrees. Enter codes 10-200 and 10-
210 to verify the condition of the thermistors.
3. Enter code 10-300 to check power supply unit 2. If necessary, install a new power supply
unit 2, PL 1.10 Item 4.
4. Switch off the machine. Remove the fuser assembly. Check that the thermistors, PL 10.25
Item 9 are clean and in good contact with the fuser heat roller. Check the wiring to the
thermistors. Install new components as necessary, PL 10.25.
5. Check for continuity between the two pins on the fuser assembly connector, PL 10.25
Item 8.
NOTE: A cold fuser has a resistance of approximately 11.5 ohms (220V/240V) or 2 ohms
(110V).
6. Check that there is continuity through the fuser heater and across the over temperature
cut-out.
7. Check the wiring between the fuser connector, PL 4.15 Item 20 and CON3, CON8 and
CON9 on Power Supply Unit 2. If necessary, install a new fuser connector.
8. Check the wiring between CON4 on Power Supply Unit 2 and CN7 on the Main PWB.
9. Install new components as necessary:
• Fuser assembly, PL 10.25 Item 1.
• Main PWB, PL 1.10 Item 1.
• HVPS, PL 1.10 Item 2.
WorkCentre 4150
10-300 Over Heat Error RAP
10-300 The fuser temperature has risen above the normal level. Although the fuser unit can
return to a normal operating temperature, the fuser may consequently be damaged.
Procedure
Switch off the electricity to the machine. Disconnect the power cord from the customer
supply while performing tasks that do not need electricity. Electricity can cause death or
injury. Moving parts can cause injury.
Do not touch the fuser while it is hot.
NOTE: The main PWB has 4 test points, GND, +3.3V, +5V and +24V. The location of the test
points is shown on the Main PWB PJ location illustration.
Refer to Wiring Diagram 1, Wiring Diagram 2 and Wiring Diagram 4. Perform the following:
1. Enter codes 10-200 and 10-210. Perform a fuser temperature check to verify the condi-
tion of the thermistors.
2. Switch off the machine. Remove the fuser assembly. Examine the fuser assembly for heat
damage. Install new components as necessary, PL 10.25 and PL 10.26.
3. Check that the thermistors, PL 10.25 Item 9 are in good contact with the fuser heat roller
and are clean. Check the wiring to the thermistors. Install new components as necessary,
PL 10.25.
4. Check that there is continuity through the fuser heater and across the over temperature
cut-out. If necessary, install a new thermostat assembly, PL 10.25 Item 2.
5. Check the wiring between the fuser connector, PL 4.15 Item 20 and CON3, CON8 and
CON9 on Power Supply Unit 2. If necessary, install a new fuser connector.
6. Check the wiring between CON4 on Power Supply Unit 2 and CN7 on the Main PWB.
7. Check that the fuser fan is working. Go to the OF3 Air Systems RAP.
8. Install new components as necessary:
• Power supply unit 2, PL 1.10 Item 4.
• Main PWB, PL 1.10 Item 1.
• HVPS, PL 1.10 Item 2.
September 2006
2-45
WARNING
WARNING
Status Indicator RAPs
10-100, 200, 10-300