Rap 7.22 Fuser Failure (U4-1, U4-2, & U4-3) - Xerox DocuPrint N24 Service Manual

RAP 7.22 Fuser Failure (U4-1, U4-2, & U4-3)
1 Switch off printer main power. Remove the Fuser Full Cover (REP 4.1.1) so you can observe the
Heat Rods. Switch on printer main power and observe the ends of the Fuser Assembly. The Heat
Rods glow.
Y N
|
Go to step 5.
2 Replace the Printer Engine Controller PWB (REP 4.10.6). The error message reappears.
Y N
|
Problem solved.
3 Replace the Fuser Assembly (REP 4.7.1). The error message reappears.
Y N
|
Problem solved.
4 Refer to the wiring diagrams Section 6 and check for a broken wire or a loose connection
between components
5 Measure the AC voltage between J23-2 and J23-6 (PL 11.2) on the AC Driver PWB. There is
110VAC (or 220VAC if the printer is the 220VAC model) between J23-2 and J23-6.
Y N
|
Go to step 7.
6 Replace the Fuser Assembly (REP 4.7.1). If the problem persists, replace the Printer Engine
Controller PWB (REP 4.10.6).
7 The Fuser cycles up and down.
Y N
|
Replace the Printer Engine Controller PWB (REP 4.10.6).
8 Measure the voltage between P401-1 and P 401-4 (6.3.2) when the Fuser Fan cycles up and
down. There is 24VDC between P401-1 and P401-4 when the fan is rotating and 0VDC when the
fan is off.
Y N
|
Replace the Printer Engine Controller PWB (REP 4.10.6).
9 Replace the AC Driver PWB (REP 4.10.3).
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7-31 Repair Analysis Procedures (RAP)