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Troubleshooting
Chart 4. Poor Print Quality in
Self-Test
and
turning
on
the
prlntar.
bo8rd
connected
Srcurs the
connectors.
Are
any
dots
1
q
lsslng or
Q
drrgglng?
No
Perform thll
No
for bent or
Chmck
printhead
rrslstance.
If
It
Is not 16.5 ohms
+/-
1.6
olmr
raplax
thr
prlnthrad.
If any
prlnthmd
pin Is
shortrd.
use
Tablo
3-5
to
chack
drlwrs
QZ
-
Q13
on tha
uln
bawd,
and
If shorted.
raplace
at
the
sm
tlm
8s
the
printhead.
Epson
FX-870/1170
3-13