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4-2 Phaser 8400/8500/8550/8560 Color Printer Service Manual
General Troubleshooting
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 5-34
for a complete explanation of each test print
available.
Startup Page Prints a page with basic 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 Displays a list of all recent diagnostic tests.
Enter Diagnostic Mode See “Service Diagnostics Mode Menu” on page 4-5
for a complete explanation of each function.