Phaser 6280 Color Laser Printer Service Manual 4-81General TroubleshootingAC NoiseThere is high pitch sound coming from the printer.Troubleshooting Reference TableApplicable Parts Wiring and Plug/Jack Map References■ LVPS, PL9.1.4Troubleshooting Procedure TableStep Actions and Questions Yes No1 1. Check for abnormal noise.2. Is there abnormal noise from the motorswhen 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 forone 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 harnessconnector.2. Reconnect the Control Panel wiringharness connector P/J220 (page 8-21).3. Does the Control Panel operate?Complete. Go to step 4.4 1. Check the MCU Board for correctinstallation.2. Reseat the MCU Board (page 8-86).3. Is the printer working?Complete. Replace theLVPS(page 8-80).5 1. Connect the printer power cord toanother 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 forone minute.3. Reseat the LVPS connectors.4. Turn the printer power On.5. Is the printer working?Complete. Go to step 8.
