Troubleshooting Other Symptoms - Printronix P5000 Maintenance Manual

Troubleshooting Other Symptoms

WARNING
Always disconnect the AC power cord from the printer before doing a
maintenance procedure. Failure to remove power could result in injury
to you or damage to equipment. If you must apply power during
maintenance, you will be instructed to do so in the maintenance
procedure.
Use standard fault isolation techniques to troubleshoot malfunctions not
indicated by display messages. These techniques are summarized below:
1. Ask the operator to describe the problem.
2. Verify the fault by running a diagnostic printer test or by replicating
3. Look for a match in the General Symptom List below. If you find a
4. If you cannot find the symptom in the General Symptom List, use the
5. Replace the defective part or assembly. Do not attempt field repairs of
6. Test printer operation after every corrective action.
7. Reinstall any parts you replaced earlier that did not solve the problem.
8. Stop troubleshooting and return the printer to normal operation when the
conditions reported by the user.
match, go to the troubleshooting procedure and follow the numbered
instructions.
Half-Split Method to find the malfunction:
a. Start at a general level and work down to details.
b. Isolate faults to half the remaining system at a time, until the final half
is a field-replaceable part or assembly. (Troubleshooting aids are
listed on page 35.)
electronic components or assemblies. Most electronic problems are
corrected by replacing the printed circuit board assembly, sensor, or
cable that causes the fault indication. The same is true of failures traced
to the hammer bank: replace the entire shuttle frame assembly. It is not
field repairable.
reported symptoms disappear.
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