Xerox M20 - WorkCentre B/W Laser, Service Manual

Page: 67 / 314

December 2006
2-21 WorkCentre M20, 4118, FaxCentre 2218 Family
10.3
Status Indicator RAPs
10.3 Over Heat Error RAP
The fuser temperature has risen above the normal level. Although the fuser unit can return to a
normal operating temperature, the fuser unit may be damaged.
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: If necessary, refer to GP 20 for the acronym list and cross reference lists of more com-
monly recognised part names.
Go to the relevant procedure:
• M20F Checkout
• 4118 Checkout
• 2218 Checkout
M20F Checkout
Refer to Wiring Diagram 1, Wiring Diagram 2 and Wiring Diagram 3. Perform the following:
1. Switch off the machine. Remove the fuser unit. Examine the ELA HOU - fuser assembly
for heat damage. If necessary, install a new ELA HOU - fuser assembly, PL 10.15 Item 1.
2. Check the wiring from the thermistor to CN7 on the PBA main.
3. Check that the thermistor is clean and in good contact with the fuser roll. If necessary,
install a new thermistor, PL 10.15 Item 7.
4. Check the wiring from CN5 on the PBA main to CON101 on the SMPS + HVPS.
5. Install new components as necessary:
• ELA HOU - fuser assembly, PL 10.15 Item 1.
• PBA main, PL 1.10 Item 4.
• SMPS + HVPS, PL 1.12 Item 4.
4118 Checkout
Refer to Wiring Diagram 7 and Wiring Diagram 9. Perform the following:
1. Switch off the machine. Remove the fuser unit. Examine the ELA HOU - fuser assembly
for heat damage. If necessary, install a new ELA HOU - fuser assembly, PL 10.15 Item 1.
2. Check the wiring from the thermistor to CN5 on the PBA main.
3. Check that the thermistor is clean and in good contact with the fuser roll. If necessary,
install a new thermistor, PL 10.15 Item 7.
4. Check the wiring from CN6 on the PBA main to CON3 on the SMPS.
5. Install new components as necessary:
• ELA HOU - fuser assembly, PL 10.15 Item 1.
• PBA main, PL 1.15 Item 9.
• SMPS, PL 1.15 Item 4.
2218 Checkout
Refer to Wiring Diagram 13 and Wiring Diagram 14. Perform the following:
1. Switch off the machine. Remove the fuser unit. Examine the ELA HOU - fuser assembly
for heat damage. If necessary, install a new ELA HOU - fuser assembly, PL 10.15 Item 1.
2. Check the wiring from the thermistor to CN5 on the PBA main.
3. Check that the thermistor is clean and in good contact with the fuser roll. If necessary,
install a new thermistor, PL 10.15 Item 7.
4. Check the wiring from CN7 on the PBA main to CON3 on the SMPS.
5. Install new components as necessary:
• ELA HOU - fuser assembly, PL 10.15 Item 1.
• PBA main, PL 1.20 Item 9.
• SMPS, PL 1.20 Item 23.