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PROCESSOR TECHNOLOGY CORPORATION
CUTS, COMPUTER USERS TAPE SYSTEM
SECTION II
2.6.2
Assembly-Test Procedure
Step 1.
Install heat sink.
position the large, black heat
sink (flat side to board) over the square foil area in the
upper right corner.
Orient the sink so that the two tri-
angles of mounting holes in the board are under the two
triangular cutouts in the sink.
Using two 6-32 screws,
lockwashers and nuts, attach heat sink to board.
Insert the
screws from back (solder) side of board.
(See Figure 2-2.)
Step 2.
Install U7 (7805UC or LM340T-5.0).
position u7 over
left-hand cutout in heat sink and observe how the leads must
be bent to fit the mounting holes.
Note that the center
lead (3) must be bent downwards at a point approximately 0.2
inches further from the body than the other two leads.
Bend
the leads so that no contact is made with the heat sink when
U7 is flat against the sink and its mounting hole is aligned
with the hole in the sink.
Fasten U7 to sink using a 6-32
screw, lockwasher and nut.
Insert screw from back (solder)
side of .board. Solder and trim leads. (Refer to Figure 2-2.)
. Heat
Upper
right-hand~
corner of board
@
I
~
J • .
~
,~.
c..--U7
Figure 2-2.
Heat sink and u7 installation.
II-9
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