4-26 Phaser 6121MFP Service Manual
General Troubleshooting
Power Supply Problems
Power Supply Troubleshooting
Troubleshooting Reference Table
Applicable Parts Wiring and Plug/Jack Map References
■ LVPS, PL10.6.16
■ Engine Control Board, PL13.0.20
■ Engine Control Board Wiring
(page 10-14)
Troubleshooting Procedure Table
Step
Actions and Questions Yes No
1 Check the voltage at the AC wall outlet.
Is there approximately 110 VAC (or 220
VAC if the printer is a 220 V
configuration) at the AC wall outlet?
Go to step 2. Notify the
customer of
improper AC
output from
the outlet.
2 Is the Fuse on the Power Supply open? Replace the
Power
Supply
(page 8-72).
Go to step 3.
3 On the Power Supply, check that
connectors CN5, CN6, and CN7 are
properly seated.
Are the connectors properly seated?
Go to step 4. Reseat the
connectors.
If the
problem
persists, go
to step 4.
4 Check voltages at P/J2 on the Engine
Control Board: 24 V (pins 1, 5, and 7), and
5 V (pin 2).
Are all of the voltages present?
Replace the
Engine
Control
Board.
Replace the
Power
Supply
(page 8-72).
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