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PAPER FEED MECHANISM
PIN FEED UNIT
a.
Actuator arm (part of switcr) extends above on/off button of switch and
downward through slot of upper paper pan into path of paper when paper
is inserted normally (switch open, button in).
b.
Switch is closed when no
p~per
exists (button out).
c.
Tighten mounting screws
w~en
conditions in para. 3.a. and 3.b. are met.
d.
Check wiring diagram 63002333 in Section 7 for detailed wiring of switch.
5.2.8
PIN FEED UNIT (FIGURE 8-8) HG
5.2.8.1 Operation
Pin feed units, left and right, provide belt units (32) for paper to travel vertically up or down.
To move paper down, pull paper feed knob (HF-9Q) outward and rotate counterclockwise; to move
paper upward, rotate clockwise. Pin feed units can be positioned laterally and are locked in position
by locking knob (16). When paper is installed on the pin feed belt units, left and right (32), spring
activated paper guide plates, left and right (12, 37) when closed, function to hold the paper on the
belts. As paper moves over the individual links of , the pin feed belts, a pin attachment guide (17)
aligns the link pins with respect to paper contact resulting in an even motion of the pin feed belt.
Direct coupling of paper feed knob and pape:r feed shaft (H F-98) is accomplished by serrated
portion of spring activated knob (HG-99) inserting into opposing serrated coupler (H F-1 00). When
this occurs, while printer is operating, paper is moved by logic signals affecting function of the form
feed mechanism (Refer to Figure HH).
Finally, a set-plate (21) is used to tighten onthe paper feed drive shaft eliminating possible
backlash affecting drive pins for print registration.
5.2 .B.2. Removal/Replacement Procedu res
A.
Left and Right Pin Feed Units (HGL (Fig. 8-10)
1.
Perform removal/replacement procedures found in para. 5.2.7.2.A,
B,
and
C
to
remove left and right pin feed assemblies.
NOTE,
The following remov!allreplacement
procedure (Fig. 5-10) applies to either
a le'ft or right pin feed unit. But where
there is a part differ,nce, key numbers
will be indicated in the text so that the
operation being applied will cover both
units.
2.
Orient unit so that spring (15) is at bottom of unit while being held in hand.
Paper holder gate (12, 37) is dosed.
3.
Rotate belt (32) by hand, and locate two set-screws (27) between pins on drive
pulley (26) for drive sleeve (24) at bottom of unit.
a.
Insert a 1
%
mm
allen-wr~nch,
and loosen two set-screws (21').
5-21
Rev. F
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