Symptom
Backward printing
'(mir~or
image).
I
I
I'
I
Light printing.
Every other line has light printing.
3~102
Isolation
Aid
Check the parallelism between the
print emitter and the print emitter
pickup. Use the
two
small land
patterns on the
top
right side
of
the
printer
to
aid you
in
making this
check. The distance between the land
patterns and the print emitter pickup
should
not
vary more than 0.025
inches (0.64 mm).
One end
of
a print line is darker.
The ribbon is not advancing.
Not enough tension on the
two
print
head springs.
Check
for
mechanical. binds, sticking,
or other interference that would
prevent the print head from making
complete contact
with
the platen.
Especially check the print head cable.
None.
Fix
Reform the right side frame near the
support shaft. Adjust the gap
between the print emitter and the
print emitter pickup. (See the 5103
MIM.) Also check that the print
emitter moves freely
as
the horizontal
fine adjustment knob is turned
to
both extremes.
Check the ground locations.
Adjust
or
replace the end
of
the
forms switch.
(See
the 5103
MIM.)
Replace the print head cable. (See
the 5103 MIM.)
Adjust
or
replace the print emitter
or
the print emitter pickup. (See the
5103 MIM.)
Adjust the copy control dial.
Replace the ribbon. Adjust the
clearance between the print head and
the platen.
(See
the 5103
MIM.)
Check the
A-frame
alignment.
(See
the 5103 MIM.)
Check
for
broken ribbon drive lines,
defective drive clutches, and incorrect
alignment
of
the ribbon drive gears.
Also check that the ribbon feed roll
release knob is
in
the proper position.
Check
for
700
to
900 grams
of
tension at the tip
of
the print head
near the print wires. This
measurement should be taken while
the platen is removed and with the
print head located near the center
of
the machine.
Check
for
broken ribbon drive lines.
Check
for
a defective ribbon drive
clutch.
/
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