Heath Heathkit SB-104A, Manual

Page: 158 / 204

Page 1-156
G
E ES E
Detail 12-108
S2: Mount the other prewired switch in the same
manner at S2 on the chassis lip.
Check the action of the pushbuttons on the two ends
of each switch. Loosen the hardware, if necessary, and
readjust the switch position to eliminate any binding
of the switch against the spacers.
Refer to Detail 12-10B and place a control solder lug
and a control nut on a 10kM2 control (#10-31). Form
the solder lug so it touches lug 1 of the control. Solder
the two lugs together.
Then remove the control nut.
Detail 12-10A
Switches and Controls
Pictorial 12-10 (Illustration Booklet, Page 8) for
wing steps.
NOT : The plastic nut starter can be shortened for use in
the ollowing step. Cut it in the middle so both halves will
sti be useful.
i
S3: Select the prewired switch assembly which has one
section larger than the other five sections. Then refer
to Detail 12-10A and mount this switch at S3 on the
chassis lip. Be sure the wired side of the switch is
1 positioned down (toward the large chassis cutout). Use
a 3/8" spacer, a 2-56 x 11/16" flat head screw, a 2-56
nut and a #3 lockwasher at each mounting hole.
1" gray
1" gray
10 gray
6-1/2' gray
8 gray
Connect a 1" gray wire from section
E lug 1 (S-1) to
section E lug 6 (NS).
Connect a 1" gray wire from section E lug 2 (S-1) to
section
E
lug 5 (NS).
Remove an additional 1/4" of insulation from
pn e
end of
the 4" gray wire (total 1/2"). Push this wire through lug 5
of section F (S-2) to lug 4 of section E (S-1).
Connect one end
of
the 10 gray wire to section D lug 2
(S-1).
3-3/4" gray
1-3/4" gray
Connect one end of a 10" gray wire to section E lug 5
(S-2).
Connect one end of a 6-1/2 gray wire to section E lug 3
(S-1).
Connect one end of an 8" gray wire to section E lug 6
(s-2).
Insert a 1-3/4" small bare wire through lugs 3 and 4 of
switch sections A, B, and C. DO NOT solder lug 3 of
section A. Solder the other five connections. Trim off
any excess wire between sections C and D.
efer to Pictorial 12-9 (Illustration Booklet, Page 8) and
ewire
the remaining pushbutton switch as follows:
( ) Prepare the following solid wires:
emove an additional 1
/4"
of insulation from
one
end of
the 1-3/4" gray wire (total 1/2"). Push this end of the
wire
through section B lug 5 (S-2) to section A lug 6 (S-1).
Connect the other end oflhe wire to section C lug 5 (NS).
Connect the 2'' gray wire from section D lug 5 (NS) to
section F lug 5 (NS).
13: Cut both leads of a 180 0,1/4-watt resistor
(brown-gray-brown) to 1/2'. Then connect the resistor
from section C lug 5 (S-2) to section D lug 5 (S-2).
( ) Connect one end of the 5-1/2 red wire to section Flug 2
(NS).
2"
gray
1
'1/2" red
gray
0 gray
onnect one end of the 3-3/4 gray wire to section A lug
3 (S-2).