PRINTEft SERVICE TIPS
Reset Signal Line Checkout
A 'reset' signal line that is not functioning
pl'OJ)erly
will
not always cause printer failures. Consequently, there
is
no particular symptom associated with this problem.
If
you suspect that the 'rl!!sef signal line
is
not functioning
properly.
use
the fbllowing
J)rocedure
to
check out the
'reset' signal
in
the printer:
1.
Power down the 5100.
2.
Do
not power down the printer.
3. Probe B1-84, 812 (-Reset).
4.
Power up the 5100.
5. Check that the probe DOWN light
is
ori.
6.
Press
the
HOLD
key.
Press
the CMD key and the
+ key
to
copy the display.
7.
Check that the probe
UP
light
is
on.
B.
Power down the printer.
9.
Check that the probe DOWN light
is
on.
~rint
Emitter
Timing Using
MOl
805
If
you
are
doing left margin adjustments,
run
MOl 805.
This MOl checks the timing
of
the left margin.
You
can
also loop on step
to
theck for intermittent errors.
If
you
do the print emitter pickup adjustment 340, do the left
margin adjustment 343 and run MOl 800
to
verify the
adjustments.
3-106
Forms Emitter Timing Scope Procedure
1.
Remove
the forms tractor unit
and
the paper.
2.
Move the copy control dial to eliminate printing on
the . platen.
3.
Load
printer diagnostic MOl
BOO.
Loop on the
step number that indicates quick forms movement
test
(PT01V5).
4.
Place
the scope lead
On
U07 on the printer
adapter card (forms emitter A). Display one pulse
on the screen.
Good: Adjust until display looks like this:
Bad:
__
-..o!J
Bad:
u
n
1..
1
--~"----
Forms
Jams
The following items
can
cause forms jams
and
incorrect
forms movement:
There
is
incorrect pressure plate clearance on the
forms tractor.
The paper deflector
is
too close to the platen.
The cut form guide
on
the left rear top cover is
not flipped back
or
it
is
used with continuous
forms.
The paper path is incorrect.
See
the BASIC or
APL reference manuals for correct forms feed
paths.
Forms
are
being used that
are
thicker than
specified. The maximum forms thickness allowed
is
0.018 inch (4.572 mm).
See
the
Form
Design
Reference
Guide,
GA24-348B.
The
ribbon shield might
be
too close
to
the platen.
The forms tractor unit
is
not parallel with the
platen and is not fully seated at
all
four mounting
points.
All the pressure rolls do not contact the platen
evenly.
/
.
...
./
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