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4.2.44
Lower Paper Clamp
(50, 100,
and
155
Ipm)
4.2.44.1 Two Coil Clamp with Two
Engaging Levers
m
Service Check
1.
Install single-part forms that are wide
enough to cover the print line. Close the
print unit.
2.
Load program 10 PRT1. This program al-
lows you to open or close the paper
clamps each time you press the ENTER
key.
3.
Close the paper clamps.
4.
Grip the forms and try to pull them up-
ward. The forms must be held tightly on
both ends. If forms are not held tightly,
do the adjustment.
5.
Open the paper clamps.
6.
Pull the forms upward. The clamp should
not hold the forms.
Adjustment
1 .
Power down.
2.
Remove the printer cover (4.2.1) steps 1
through 3, and forms.
3.
Close the print unit and set forms thick-
ness control to 1.
4.
5.
I
DANGER
The ribbon clutch solenoid becomes
very hot after extended use. Be sure
it is cool before attempting maintenance.
For machines with pivot pins, remove the
keyboard cover and divider (4.2.1) steps
4 through 6.
For machines with pivot screws, remove the
rear forms guide. Remove the two printer
mounting screws under the frame and place
the printer in the service position.
While holding levers
m
up, adjust guide
plates for 0.000 inch to 0.003 inch (0.00
mm to 0.08 mm) at
Ii .
6.
7.
8.
Do service check. If OK, omit remaining
adjustments.
Remove the print unit (4.2.10).
Engage the paper clamp mech-
anism by lifting levers
m
up.
Note:
Hold levers up with folded paper
between levers and print base.
9.
Loosen screws
II ,
then turn adjusting
nuts
m
1/2 turn clockwise to move the
clamp away from the lower forms guide
m·
10.
Load program 10 PRT1. This program
allows you to open or close the paper
clamps each time you press the ENTE R
key.
11.
Close the paper clamps.
12.
Make sure the clamp bar
III
is straight.
Form bar carefully, if needed.
13.
Check between the two outer tension
springs (both ends) for condition
a .
If the clearance is incorrect, turn
adjusting nut(s)
m
until correct. When
the clearance is correct, check to be sure
that the armature is sealed against the
residual on the solenoid case
iii .
Check clearance
rJ
again.
a}:===:r:::-
Rear Forms
Guide
~
/ /
Lower
~ ~mFo~ms
GUide
. 0.001 inch loose
(0.03 mm)
4-58
Note:
If the adjustment cannot be made
with the adjusting nut, rotate the solenoid
and bracket to vary the adjustment:
a. Tighten screws
Ii .
b. Power down, and do lower paper clamp
removal, steps 5 and 6.
c. Rotate the solenoid bracket one turn
around the adjusting nut (clockwise to
increase
B ).
d. Install solenoids and brackets. Loosen
screw
II
,then repeat adjustment, steps
8 through 13.
14.
Open the paper clamps. Turn both ad-
justing nuts
m
112
turn counterclock-
wise to move the clamp toward the
lower forms guide
m ;
then tighten
both screws
m .
15.
Remove the support material used to
hold the levers up
I!J
,then unlatch the
clamp mechanism.
16.
I nstall single-part forms that are wide
enough to cover the print line.
17.
Latch the clamp mechanism, and hold
the levers up as before.
18.
Close the paper clamps again. Check for
even forms clamping by trying to pull
up on each end of the form. The form
should be held tightly across its width.
Repeat adjustment if form is not held
tightly.
19.
Power down and remove the support
material
m.
20.
I nstall the print unit (4.2.10).
21.
Place the printer in the operating posi-
tion and install the rear forms guide if
previously removed, and covers.
P
·
U·
Guideplate
n~/n
L-
IT
?"OOO
inch - 0.003 inch
(0.00 mm - 0.08 mm)
-L
i j ...
m
T
..
m
Lift levers and
insert supporting
material to hold
_ _ _ ----"-___ Ie_vers up.
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