Xerox ColorQube 8570 Service Manual page 345

Fuse F501 Failure
F501 Fuse could be blown from the short of the Ground Plane to a +3.3V on the I/O Board. A
machine with a blown F501 Fuse will appear non-functional. Perform the following procedures
to determine if F501 Fuse is blown.
NOTE: Other components that carry +3.3V are the Ink Loader, Control Panel, Paper Path
Motor Encoder, and the Lower Tray.
Make sure to find the short before replacing the Power Control Board.
1. Turn On the power switch.
Xerox Internal Use Only - Revised, 3rd Revision
ColorQube 8570/8870 Service Manual
Figure 8 Fuses Location on the Power Control Board
2. The Electronics Module Fan should come On and stay On.
3. The Control Panel will be blank and remain blank.
4. The PE and PS lights on the side of the printer
blinking sequence is fluttering blinks: 2 blinks - space - 2 blinks - space - 6 blinks --- blink
code 226.
5. The power switch when turned Off will not work and the Fan will remain On. The plug will
have to be removed to shut off the power.
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(Figure 4) will be blinking together. The
General Troubleshooting
Electrical Troubleshooting