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Xerox DocuPrint N17 Service Manual
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Repair Analysis Procedures (RAPs)
7.4.8 Quartz Heater Failure
1 There is resistive continuity between J3-1 and J3-4 on the LVPS.
Y: Go to step 2.
N: Go to step 6.
2 Check if the voltage between P/J13-4 (/HEAT ON) and P/J25-5 (S6) is 0VDC when the printer
power is on and all cover interlocks are actuated and goes to +5VDC when the interlocks are
deactuated.
NOTE: Disconnect P/J115 from the HVPS before checking the voltage.
NOTE: This can be checked by opening and closing the Front Cover when the Fuser Assembly has
cooled to room temperature.
Y: Go to step 3.
N: Go to step 4.
3 Check for 0VDC between P/J11-10 (/HEAT ON) and P/J12-5 (SG) when the printer power is on
and all cover interlocks are actuated and check for +5VDC when the interlocks are deactuated.
NOTE: Disconnect P/J115 from the HVPS before checking the voltage.
NOTE: This can be checked by opening and closing the Front Cover when the Fuser Assembly has
cooled to room temperature.
Y: Replace the LVPS Assembly.
N: Replace the Wire Harness between P/J11 and P/J13.
4 There is +5VDC between P/J25-2 and P/J25-5 on the Print Engine Controller.
Y: Go to
RAP 7.4.9 Temperature Sensor Assembly Failure.
N: Go to step 5.
NOTE: The LD power source of the Laser Assembly, “+5VDC-LD,” also supplies power for generating
the Quartz Heater actuating signal.
5 Disconnect P/J18 from the Print Engine Controller and switch on the printer power. Ensure the
Quartz Heater is functioning properly when power comes on.
Y: Replace the Laser Assembly.
N: Replace the Print Engine Controller.
6 Remove the Fuser Assembly. There is continuity between J2-1 and J2-5.
Y: Go to step 7.
N: Replace the Fuser Assembly.
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