Using The Troubleshooting Procedures - Xerox Paser 7400 Service Manual

Using the Troubleshooting Procedures

1.
Applicable Status Code(s)
troubleshooting procedure.
2.
Applicable Parts
information available for a particular part or procedure.
3.
Follow each
Step
until the problem is fixed or resolved.
4.
The
Actions and Questions
procedure. Also included are precautions and/or additional procedures you must
follow to isolate the problem.
5.
When a procedure instructs you to test a component using Service Diagnostics,
see "Fault Isolation" on page 4-6 for the detailed steps and functions for testing
parts, assemblies, or subsystems of the printer.
6. Some actions are followed by a question. If your response to the question is
then follow the instructions for a
, then follow the instructions for a
No
7. Note that two types of photo sensors are used: photo-reflective and photo-
receptive. Photo-reflective sensors use light reflected back from an object to
detect its presence or absence. Photo-receptive sensors use an actuator or the
object itself to block the light path to detect an object or condition.
8.
Troubleshooting procedures frequently ask you to take voltage readings or test
for continuity or resistance at certain test points. The
table provides pointers to the diagrams that provide this information.
References
9.
Troubleshooting procedures often ask you to replace a printer component. When
instructed to replace a non-spared component and that component is part of a
parent assembly, replace the entire parent assembly.
General Troubleshooting
lists the error message(s) addressed by each
and
Wiring and Plug/Jack References
in a troubleshooting procedure sequentially in the order given
box instructs you to perform a certain action or
Yes
reply. If your response to the question is
reply.
No
Wiring and Plug/Jack
assist you in locating
Yes
3-11
,