Printronix p300 Maintenance Manual page 162

FROM SHEET 1
Replace hammer
bank cable per para
5–46.
Print out and
check for symptom.
Symptom
present
YES
Refer to schematics and
check MPU circuit signals
with scope.
Circuit
YES
Figure 4–27. Garbled Letters and/or Wrong Font (2 of 2)
4–56
A
NO
Normal operation.
?
NO
ok
?
Refer to schematics
and troubleshoot
using standard
techniques. If problem
remains, contact
authorized distributor
service
representative.
Return to
Repair as
necessary.
Print out and
check for symptom.
Symptom
NO
present.
?
YES
P300/P600 Troubleshooting
Return to
Normal operation.