How To Troubleshoot - Printronix SLPA7000 User Manual

Chapter 5

How To Troubleshoot

How To Troubleshoot
You will be more successful in troubleshooting printer problems if you use
standard fault isolation techniques, which are summarized below:
1. Ask the operator to describe the problem.
2. Verify the fault by running a diagnostic printer test or by replicating the
conditions reported by the user.
3. Look for a matching message or symptom in Table 8 on page 165 or
Table 9 on page 199. If you find a match, follow the troubleshooting
instructions.
4. If you cannot find the symptom in either troubleshooting table, use the
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
WARNING
ALWAYS disconnect the AC power cord from the printer or the power
outlet before doing any 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.
5. Replace the defective part or assembly. Do not attempt field repairs of
electronic components or assemblies. Most electronic problems are
corrected by replacing the printed circuit board assembly, sensor, or
cable that causes the fault indication.
6. Test printer operation after every corrective action. (See "Printer Tests"
on page 163.)
7. Install any parts you replaced earlier that did not solve the problem.
8. Stop troubleshooting and return the printer to normal operation when the
reported symptoms disappear.
162
is a field-replaceable part or assembly.