4-14 Phaser 6300/6350 Color Laser Printer Service Manual
Fan Output Circuit
For the Fan Rear On(H) signal, the output voltage varies depending on the status of 
FAN LOW signal and FanStop signal from the Fan Control circuit on the LVPS (refer 
to 
"Power" on page 10-17).
+24 VDC Output Stopped By Interlock Switch
Opening Door A or B opens the Interlock Switch. This shuts off the +24 VDC 
supplied to the motors, clutches, and solenoids.
AC Power Supply Troubleshooting
DC Power Supply Troubleshooting
Troubleshooting Reference Table
Applicable Parts Wiring and Plug/Jack References
■ LVPS, PL9.1.6 ■ Print Engine Power Wiring Diagram (page 10-17)
Troubleshooting Procedure Table
Step Action 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
Check the power cord for defects or a loose 
connection.
Replace or 
reseat the power 
cord.
Replace the 
LVPS  
(
page 8-99).
Troubleshooting Reference Table
Applicable Parts Wiring and Plug/Jack References
■ LVPS, PL9.1.6 ■ Print Engine LVPS and Drive P/J Locator (page 10-6)
■ Print Engine Power Wiring Diagram (page 10-17).