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Page 23
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TROUBLESHOOTING CHART
The following chart lists conditions and possible causes of several specific
malfunctions. If a particular part is mentioned (Q7 for example) as 8 possible
cause. check that part and other components connected to that part to see that
they are installed and/or
wired
correctly. Also check for solder bridges and poor
connections in the surrounding area.
It
is also possible, on rare occasions. for a
part to be faulty and require replacement.
PROBLEM
POSSIBLE CAUSE
Printer completely dead. Power lamp not lit.
1.
No power at wall outlet, line cord.
2.
SW1, Fl, Tl, 0123, 0125.
Printer completely dead. Power lamp III
1.
Ul, Q128, Q129, Ul08, Ul06.
2.
Printer
~on
line"
with
no signal received.
Head
moves normally,
but does
not
print
1.
F10t, Ql, 0125. 0126. 0127, 0124.
2.
0118,0119,0121,0122, Ul06.
Upon
power
up, head moves 10 the
right;
then retl.Kns to
1.
03, Ul09, Ul06.
Iett-hand stop.
motor
kee9s
running
(dutch
slipping).
2.
Motor
lead CO'II'I8Ctions.
Upon power
up, head
rT'IO¥8$
to
1tIe right
and then
stops.
1.
03. Ul09, Ul06, Ul1SA. 0117, 0111.
Does
not
retum to lett
margin.
2.
Head motor.
Top raw
of dots missing in printed
characters.
...
1.
Ul140. U106, 0103, 0104.
....
2.
Plint head.
.....
Seoond raw
of
dots missing In primed characters.
·...
1.
U114E, Ul06, 0105, 0106.
2.
Prim head.
.....
.....
Third raw of dots missing In printed characters.
1.
U114F. U106. 0107. 0108.
....
2.
Print head.
.....
·....
Fourth row of dots missing In
printed
characters.
1.
U114C, U106. 0109. 0110.
2.
Print head.
.. ...
.....
F'rfttl row of dots miSSIng
In
printed characters.
·
1.
U114B, U106, 0111. 0112.
· . ...
2.
Prim Ilead.
·
. ....
.....
Sixth raw of
dots missing in primed characters.
1.
Ul14A. Ul06, 0113. 0114.
....
2.
Prim head..
.....
....
Bottom raw of dots missing in printed characters.
1.
Ull5C, Ul06, 0115, 0116.
...
2.
Print
head.
Ribbon motor
does
not
run, or runs
~
no
1.
Ull58, Ul06, 0113, 0119.
aetMI
printing
is being done.
2.
Ribbon drive motor.
3.
OUt of paper or head is hot and
data is in butler.
1.
Ull50, Ul06, 0116, 0112.
Prim head does
not
move to the
right
at any time.
2.
Head motor.
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Table of Contents
Troubleshooting
