Phaser 7500 Printer Service Manual 4-9
General Troubleshooting
Using Service Diagnostics
While in diagnostics mode, the printer will not power Off using the Power
Switch. To properly power Off the printer, exit diagnostics, and after reboot,
set the Power Switch to the Off position.
The printer’s operating system monitors sensors located throughout the print
engine and attached options. Sensor signals are used to monitor media handling
and mechanical activity along the entire media path. As a sheet travels along the
paper path, sensors change state temporarily to indicate the sheet’s presence. If
the pattern of sensor state changes differs from the expected timing for a
particular media size and path, the sensor where the timing difference occurs
identifies the error to report.
However, having the error message information doesn’t necessarily pinpoint the
problem. Sensor signals locate where, but often cannot identify why. Motors, belts,
gears, solenoids, and numerous other parts are involved in media transport. The
Service Diagnostics’ suite of tests and utilities are the best tools available to
pinpoint the root cause behind the reported error.
Entering Service Diagnostics by Rebooting the Printer
1. Turn the Printer power Off.
2. Hold down the Back button and Help buttons simultaneously and turn the
Printer back On.
3. Continue to hold the buttons until the following message is displayed on the
Control Panel: Service Diagnostics V#.##, Initializing..., and then release the
buttons.
4. The Control Panel displays the Service Diagnostics Menu.
a. You can print a Service Diagnostics Menu Map by highlighting Print
Service Menu Map and pressing OK.
b. The printer will run through POST and return to Ready.
c. You will need to re-enter the Service Diagnostics menu.
Entering the Service Menu without Rebooting the Printer
1. Scroll to the Troubleshooting -> Service Tools -> Printer Status Page menu.
2. Hold down the Up and Down buttons simultaneously.
You can print a Service Diagnostics Menu by highlighting Service
Diagnostics Menu Map and pressing OK.
3. Scroll down the menu to select Run Service Diagnostics and press OK.
4. The Control Panel displays the Service Diagnostics Menu.
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