Rap 31 Fuser Assembly - Xerox DocuPrint N2025 Service Manual

RAP 31 Fuser Assembly

Procedure
WARNING
If the printer has been switched on, the fuser may be hot.
Switch the printer power off. Remove the Fuser Assembly (REP 5.1). Measure the resistance
between pins A1 & A2 and between pins 2 and 4 or 1 and 4 of P174 on the Fuser Assembly
(Figure 1). The resistance between A1 and A2 reads between 10K and 350K ohms
(depending on the temperature of the fuser) and the resistance between pins 1 and 4
reads less than 5 ohms.
Y N
Replace the Fuser Assembly (REP 5.1).
Figure 1 Fuser Connector (P174)
Reinstall the Fuser Assembly. Remove the Lower Rear Cover (REP 1.7). Disconnect P/J172
from the Fuser PWB. Ensure that the Rear Cover is closed. Check the continuity between
P172 pin 1 and P172 pin 3. There is continuity between P172 pin 1 and P172 pin 3.
Y N
Remove the Right Side Cover (REP 1.2). Ensure that the Rear Cover is closed. Check
continuity between P/J172 pin 3 and both sides of the Rear Cover Interlock Switch.
There is continuity between P/J172 pin 3 and both sides of the Rear Cover Interlock
Switch.
Y N
Repair or replace the Fuser Wiring Harness (PL 9.2) or replace the Rear Cover Inter-
lock Switch as necessary (PL 9.2).
Replace the Fuser Harness Assembly (PL 9.2).
Remove the Left Side Cover (REP 1.1) and the Print Engine Controller PWB Cover (REP 8.5).
Disconnect P/J17 from the Print Engine Controller PWB. Check for continuity between P17 pin
7 and P17 pin 8. There is continuity between P17 pin 7 and P17 pin 8.
Y N
Replace the Fuser Harness Assembly (PL 9.2).
A
Initial Issue
DocuPrint N2025/N2825
A
Disconnect P/J171 from the Fuser PWB. Check for continuity between P17 pin 3 and P171 pin
1, P17 pin 2 and P171 pin 2 and P17 pin 1 and P171 pin 3. There is continuity between all
pins measured.
Y N
Replace the Fuser Harness Assembly (PL 9.2).
Reconnect P/J171, P/J172, and P/J17. Switch the printer power on. Measure the voltage
between J17 pin 2 on the Print Engine Controller PWB and frame ground. The voltage in 3.3
VDC.
Y N
Measure the voltage between P/J16 pin 4 on the Print Engine Controller PWB and frame
ground. The voltage in 3.3 VDC.
Y N
Replace the LVPS (REP 8.6).
Replace the Print Engine Controller PWB (REP 8.5).
Replace the Fuser PWB (REP 8.8). If the problem persists, replace the Print Engine Controller
PWB (REP 8.5).
02/2000
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Status Indicator Repair Analysis Procedures
RAP 31