Heath Heathkit SB-104A, Manual

Page: 72 / 204

Page 1-70
(#443-5)
(#443-2) inte­
1C106, 1C108,
1C115, IC116:
KEEP YOUR
SOLDERING
IRON TIP
CLEAN
Ek
[@
Ea
SN7 I c 1 1 7 :
integrated circuit.
circuits.
ic102, IC1,,,%e es-62ei
IC110: Five
l
ed circuits. integra
73N (#443-5)
SN7473N
I t C 1 1 B:
ted circuit. i ra
icn13.
1"",an
tea
SN7490N (#
N
■
/__o.era
are
in
erformed in
The steps
P?"
~~cent
board.
this area of tl re
ci
PART
NUMBER
IDENTIFICATION
DRAWING
IC107, 1C109,
1c103, 1IC105 ~es (#+443-13)
Fwe SN747 I C 1 1 1 :
'iw
ted
circuits
iterate ,,
SN7400N (#443-
1 c 1 1 2 :
integrated circuit.
.g ;
will install IC's.
� M A R K E D
"mz}-=
l
e%
s£it
??
HA
M O O N
M A R K
d P ressure to an
ir
downward ; ju
a«More
m p " " f; ~ , ~ s n a g
IC
make sure ea Handle IC's
w1
perture.
proper so c " " _ very easily bent.
care as their
pins
you
wI
the
following steps, .
1
end of each
Int ch the pin '
Be careful to mat¢ , on the circuit
If moon mar I
IC to the ha - . 4 7A on Page 63.
d !
See Detail
­
boa r ,
tall an IC, first be OTE
Before you ms ht Then lay
it
' a s % , s i a g
~ ~
sure m e_ " ; ~ « ~ w s o y_ p s_ ;
wn on one o nd roll it over u
" " , % o ~ A i "
~~.en
z :
z i t . . . .
shiohy
as"[~row ot
pins
­