Printronix p300 Maintenance Manual page 138

FROM SHEET 1
B
Check for dirt
and debris.
Is printer
clean
?
YES
Check for ribbon
fold over.
Ribbon
ok
?
YES
Check hammer coil(s)
for opens, shorts, or
visible damage
(burns). Resistance s/b
≅
W
5.20
D
GO TO SHEET 5
4–32
NO
Clean printer per para
3–4.
Print out and check
for symptoms.
Symptom
present
?
YES
NO
Fig
Ribbon Folds Over
4–8
Figure 4–14. Missing Dots (4 of 6)
NO
Return to
Normal operation
P300/P600 Troubleshooting