Diagnostic Information 2-11
4022-XXX
Service Checks Flowchart
How to Use the Service Checks Flowchart
• Follow your problem to the individual Primary Service Check that corresponds to
your error code, printer operation problem, or print image problem.
• Follow the instructions presented in the Service Check.
• Voltage and resistance values presented in the Service Checks are an
approximation. Actual readings may vary from the stated values.
• Primary Service Checks may direct you to a Secondary Service Check.
How to Follow a Service Check
1. Each numbered step in a service check instructs you to perform a certain action or
procedure.
2. The Actions and Questions box may contain additional information and numbered
procedure steps you must follow to perform the action.
3. The action is followed by a question.
4. If your response to the question is Yes, then follow the instructions for a Yes reply.
5. If your response to the question is No, then follow the instructions for a No reply.
6. Service Checks may ask you to take voltage readings at certain test points within the
printer.
7. Service Checks may ask you to run a specific diagnostic routine in order to test a
FRU or circuit.
8. Service Checks often ask you to replace a printer FRU. Removal and Replacement
Procedures provide you detailed steps for removing and replacing major parts of the
printer.
See the following sample service check.
Step Actions and Questions Yes No
1 FUSER INSPECTION
Generate another Test Print and switch OFF
printer power when the print is halfway
through the Fuser.
Open the Top Cover.
Examine the paper areas before the image
enters the Fuser and after the image exits the
Fuser.
Is the image normal before it enters the
Fuser, but light when it exits the Fuser?
Replace the Fuser
Assembly. Go to
“HVPS Cover
Removal” on
page 4-14
Go to step 2
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