Instruction manual

Chapter 3 Troubleshooting Other Symptoms

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

conditions reported by the user.

3. Look for a match in the General Symptom List below. If you find a

match, go to the troubleshooting procedure and follow the numbered

instructions.

4. If you cannot find the symptom in the General Symptom List, 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

is a field-replaceable part or assembly. (Troubleshooting aids are

listed on page 29.)

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. The same is true of failures traced

to the hammer bank: replace the entire shuttle frame assembly. It is not

field repairable.

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

reported symptoms disappear.

Table 3: General Symptom List

Symptom

Troubleshooting

Procedure

Communications Failures page 88

Jams

CLEAR PAPER JAM message instead of LOAD PAPER when

printer is out of paper

page 47

CLEAR PAPER JAM message will not clear and paper does

not move

page 47

CLEAR PAPER JAM message will not clear but paper moves page 48