Low Voltage Power Supply (Lvps) Assembly Failure (+12Vdc) - Xerox DOCUPRINT N17 Service Manual

7.4.6 Low Voltage Power Supply (LVPS) Assembly Failure
(+12VDC)
1 Check for +12VDC between P/J12-3 (+12VDC) and P/J12-6 with P/J25 disconnected.
NOTE: Conduct this analysis before the LVPS Assembly stops voltage output due to the absence of
sufficient load (within 30 seconds after switching on the printer power).
Y: Ensure the voltage can be read at P/J25 (disconnected) before going to step 2.
N: Replace the LVPS.
2 Check for +12VDC between P/J25-3 and P/J25-6 with P/J25 connected to the Print Engine
Controller.
Y: Go to step 3.
N: Replace the Print Engine Controller.
3 Check for +12VDC between P/J25-3 and P/J25-6 with P/J25 connected and the System
Controller installed.
Y: Allow the system to warm up for 10 minutes before going to Final Actions.
N: Remove all of the options and retest prior to replacing the System Controller.
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7-47 Repair Analysis Procedures (RAPs)