Olivetti DR N17, Service Manual

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687200Q Service Manual 7-13
7.3.3 “Fuser Failure” Power Off/On (U4)
Initial Analysis
Check the interlock tab on the front and rear covers.
1 Open the rear cover and cheat the rear cover interlock sensor. At power on, the Fuser heater
turns on.
Y: Go to step 8.
N: Go to step 2.
CAUTION Before performing the following step, let the Fuser Assembly cool down.
2 Remove the Fuser Assembly. There is continuity between P2-1 and P2-5.
Y: Go to step 3.
N: Replace the Fuser Assembly.
3 At power on, line voltage can be measured between J2-1 and J2-5.
Y: Check condition of P/J2. If the connectors are damaged, replace the Fuser PWB or the
Fuser Assembly.
N: Go to step 4.
4 At power on, line voltage can be measured between J3-1 and J3-4.
Y: Replace the LVPS-to-Fuser PWB Harness.
N: Go to step 5.
5 At power on, line voltage can be measured between P/J1-1 and P/J1-2.
Y: Go to step 7.
N: Go to step 6.
6 At power on, line voltage can be measured between T7 and T8 of the main power switch.
Y: Go to step 9.
N: Replace the Main Power Switch.
7 At power on, P/J11-10 is at a low logic level (approxi5VDC).
Y: Replace the LVPS.
N:
Go to RAP 7.4.9 Temperature Sensor Assembly Failure.
8 After the power-on sequence, the Fuser heater cycles off and on.
Y: Replace the Print Engine Controller.
N: Go to RAP 7.4.9 Temperature Sensor Assembly Failure.
9 Verify continuity between T7 and P/J1-1 and T8 and P/J1-2. Continuity is measured on both
wires.
Y: Replace LVPS
N: Repair open wire