Phaser 6280 Color Laser Printer Service Manual 4-81
General Troubleshooting
AC Noise
There is high pitch sound coming from the printer.
Troubleshooting Reference Table
Applicable Parts Wiring and Plug/Jack Map References
■ LVPS, PL9.1.4
Troubleshooting Procedure Table
Step Actions and Questions Yes No
1 1. Check for abnormal noise.
2.Is there abnormal noise from the motors
when turning On the printer?
Go to step 2. Go to step 4.
2 1. Turn the printer power Off.
2.Disconnect the power cord and wait for
one minute.
3.Reseat the LVPS connectors.
4.Turn the printer power On.
5.Is the printer working?
Complete. Go to step 3.
3 1. Check the Control Panel’s wiring harness
connector.
2.Reconnect the Control Panel wiring
harness connector P/J220 (page 8-21).
3.Does the Control Panel operate?
Complete. Go to step 4.
4 1. Check the MCU Board for correct
installation.
2.Reseat the MCU Board (page 8-86).
3.Is the printer working?
Complete. Replace the
LVPS
(
page 8-80).
5 1. Connect the printer power cord to
another electrical outlet.
2.Turn the printer power On.
3.Is the printer working?
Complete. Go to step 6.
6 1. Turn the printer power Off.
2.Check the power cord connection.
Reconnect the printer power cord.
3.Is the printer working?
Complete. Go to step 7.
7 1. Turn the printer power Off.
2.Disconnect the power cord and wait for
one minute.
3.Reseat the LVPS connectors.
4.Turn the printer power On.
5.Is the printer working?
Complete. Go to step 8.
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