4-2 Phaser 8400/8500/8550 Color Printer
Introduction
This chapter covers the general start-up, Power On Self Test (POST), and power
supply operations of the printer to aid in troubleshooting problems not associated with
a Control Panel error message or error code. For troubleshooting problems associated
with an error code or Control Panel error message, notes on how to use the
troubleshooting procedure tables, and how to use service diagnostics, see Chapter 3
"Error Messages and Codes" on page 3-1. The Printer Status page also contains useful
troubleshooting information. This page provides general printer information, life
information for all consumables, printhead cleaning and power cycles, and jam and
error code information.
Troubleshooting procedures will isolate a problem to a specific component or
subassembly, in some cases including the wiring harness. If you go through the
procedures in a troubleshooting table and still are unable to solve the problem, re-read
the Theory of Operations for the problem area and ensure that you understand how
that section of the printer is supposed to function.
Hidden Service Menu
The Hidden Service Menu provides access to a large group of information pages and
functions usable for diagnosing and correcting printer malfunctions and accessing
special features. Display the Hidden Service Menu as follows:
1. On the Control Panel, press the Down Arrow button to select Troubleshooting
and then press OK.
2. Press the Down Arrow button to select Service Tools, and then press OK.
3. While pressing and holding down the Up Arrow button, press the Down Arrow
button to display the Hidden Service Menu.
Menu Item Description
Test Prints See "Analyzing Service Test Prints" on page 5-33 for a
complete explanation of each test print available.
Startup Page Prints a page with basic printer configuration and
networking information.
Eliminate Light Stripes Performs a cleaning procedure to remove light stripes in
prints; this process will take about 5 minutes.
Fault History Displays available information regarding the last 15 faults
reported by a test and/or the print engine.
Jam History Displays available information regarding the last 20 Jams
reported by a test and/or the print engine.
Diagnostic History (8500) Displays each diagnostic test performed on the printer.
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