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Eico HF-81 - Page 37

Eico HF-81
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1.
(d)
Fig. 8. Cut the negative (-) lead on
the 30mfd electrolytic capacitor,
C39, tol 1/4"
. Connect to TBI0-
1 (C).
2. ,,)
Fig. 8. From the
output transformer
, T2
, connect the yellow lead to
TBl-4 (C), the green lead to TB1-
3 (S1), the brown lead to TBl-
2 (Sl), the
black lead to TB 1-
1 (C), the red lead
to TB5-
3 (C), the blue lead to XV7-
7 (S H,
the bro
ym-
yellow lead to XV8-
7 (Sl), and the
orange lead to TBl-
5 (Sl).
3. (V)
Fig. 8.
Connect a 3 1/2" piece of
green wire from XV7-
6 (C) to
XV8-6 (C).
piece of single conductor shielded
cable~ Twist the
shield strands together.
Strip the insulation on the inner conductor back 1/4"
. Connect the
shield to
TB21-
1 (C) and the inner conductor to
TB21-2 (C). On the
other end of the
same cable, strip the outer
insulation back 1/2"
. Twist the shield strands to-
gether.
Strip the insulation on the inner
conductor back 1/4"
. Connect the
shield to J14, 15-
4 (51) and the inner conductor to J14, 15-
3 (Sl).
4.
U)
Fig. 8.
Connect a 3 1/2" piece of
green wire from XVI 0-
8 (C) to
T8 19- 1 (C).
5. .
Fig. 8. Cut
all leads on two 50mfd
, 25V,
electrolytic capacitors,
C29, and C30, to 1"
. Cover the
positive (+) leads on both capacitors with a
3/4"
piece of spaghetti. Connect the positive lead of
one capacitor toXV10-
(S2) and the negative (-) lead to ground lug "
C" (Sl) at XV9.
Connect the
positive (+) lead of the
second capacitor to XV8-
3 (52) and the negative (-)
lead to ground lug "
D" (Sl) at XV7.
;::; 6. (\.
Fig. 8.
Cut both
leads on a
1650, 5 watt resistor
)' R56, to 3/4"
Cover one lead with a 1/2" piece of spaghetti and connect XV9-
3 (S2). Con-
nect the other lead to ground lug "
E" (Sl) at XVI0.
Dress resistor away from
surrounding wires.
7.
Fig. 8. From the output
transformer, T3, connect the yellow lead to
TB2-4
(C)r the green lead to TB2-
3 (S 1), the brown lead
to TB2-
2 (S 1), the
black lead to TB2-
1 (C), the red lead to TB5-
3 (S3), the blue lead to XV9-
(Sl), t~e brown-
yellow lead toXV10-
7(Sl)and the orange lead to TB2-
5 (S1).
I /
8.
(~f
Fig.
S. Connect the
brown lead from hole "
T" to TB11-
2 (C).
9. (J) Fi .
/;. Connect" 2 1/2"
piece "Iced wi'e from TB9-
3 (C) to TB 11-1
(C).
10.
(\1
Fig. 8.
Connect the outer shield from the
single conductor cable
(from ho
le li
) to TB21-
1(C) and the inner conductor to TB21-
2 (C).
13. (le
) Fig. 8. Cut one lead on
the
1650,
5 watt resistor, R57, to 1 1/2"
and cover with a 1 1/4" piece of spaghetti.
Connect this lead to XV7-
3 (S2).
Cut the ot~er lead to 1/2" and connect to
ground lug R
(Sl). Dress away
from
the surrou,nding wires.
14.
("~t
Fig. 8.
Connect a 3 1/2" piece of
black wire from TB8-
2 (C) to
TB21-1
(C).
15. (,
/) Fig. 8. Connect a 3"
ieceofblackwirefromTB21-
1 (C)toTBl1-
3(C).
16.
Fig. 8.
Connect a 3 1/2" piece of black wire from TBll-
3 (C) to
ground lug n G" (C).
17. (\i)/Fig. 8.
Connect the grey lead from hole "
T" to XV4-2 (Sl).
18.
F)g. 8. Connecta 4"
piece of orange wirefromTB10-
2(C)toTB9-
2(C).
/ /
19. ~~
fg. 8. Connect"
3 1/2" p;aca "hod who
a froM 1811-1 (C)lo
TBI8-3 (C).
20. ('vi Fig. 8. Connect
a 4 1/211
piece of red wire from TB18-
3(C) to C37-B (C).
21. ( )
Fig. 8. Connect a 3" piece of red wire fromTB18-
3 (C) to TB15-
1 (C).
22. ("'
r Fig. 8. Connect a 3 1/2"
piece of orange wire from TB18-
2 (C) to
C37-A (0).
23.
Fig. 8. Connect a 1" piece
of bare wire to the dual concentric pots
in the rectangular hole at the middle-
front of the chassis. Connect
from R24-
(Sl) to R25::-
3 (C).
12. (~
Fig. 8.
Strip back the outer insulation 3/4" from
one end of an 8"
24. (\J fig. 8.
Connect a 2" piece of black wire from R25-
3(S2) to TB11-
3 (C).
\l/
25.
(\J) Fig. 8.
Connect a
1 3/4" piece of green wire from R25-
2 (51) to
XV3-7 (S 1).
11.
(J)
Fig. 8.
Connect a 3 1/2" piece of orange wire from TB9-2 (C)
TB18-2 (C).

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