Heathkit SB-1000 - Page 38

Page 40
w Connect one end of the remaining 16" medium
violet stranded wire to the bottom hole in the
solder lug at barrier strip lug 5 (S-2). Make a
mechanically secure connection. Route the other
end of the wire as shown; it will be connected
later.
Refer to Pictorial 6-4 while you perform the follow-
ing steps.
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Refer to the inset drawing on the Pictorial and
install cable ties onto the rear panel wires at
the three indicated locations.
Check the rear panel assembly for unsoldered
connections. The only lug that should not be
soldered yet is phono socket J5 lug 1.
Sct the rear panel aside until it is called for in a
step.
CENTER PANEL
Refer to Pictorial 6-5 while you perform the follow-
ing steps.
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Position the center panel as shown in the Pictor-
ial.
Refer to Detail 6-5A and use 6-32 x 1/4" hard-
ware to mount two #6 solder lugs to the center
panel at CA. Be sure to position the solder lugs
as shown in the Pictorial before you tighten the
hardware.
D3: Refer to Detail 6-5B and use the following
procedure to mount the 7.5-volt, 10-watt zener
diode to the center panel at D3:
1, Cut open the silicone grease container as
shown in the inset drawing. Then apply a
thin layer of the grease to both sides of
the insulator that is packed with the
zener diode. Discard the remaining
grease.
2. Line up the hole in the prepared insulator
with hole D3 in the center panel. Then
position the insulator onto the panel. The
grease will hold it in place.
3. Use the hardware supplied with the
zener diode to mount it to the center panel.
Be sure to position the shoulder washer so
Heathkit
its shoulder enters the panel hole. Also be
sure to position the solder lug as shown in
the Pictorial before you tighten the
hardware.
4. Carefully bend the solder lug away from
the panel so you can connect a wire to it
f~ later.
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5. \ie you have an ohmmeter available, check
ithe resistance between the diode mounting,
{stud and the center panel. There should be
infinitely high resistance.
K1: Refer to Detail 6-5C and use a #6 lock-
washer and a 6-32 nut to mount the antenna
relay to the center panel. Be sure _ the locating
tab on the relay enters its hole in the panel. Cut
the two indicated relay leads from their lugs
and prepare the ends, if this has not already
been done.
Carefully bend the indicated relay contact as
shown in the’ Pictorial so it does not make con-
tact with the relay's wiper contact. NOTE:
This contact is not used in your Amplifier and
by bending the lug away from the wiper, you
improve the long-term reliability of the other
lugs.
Bl: Refer to Detail 6-5D and use the following
procedure to mount the fan to the center panel:
1. Look at the fan and note that somewhere
on the frame are arrows that shown the
direction of air flow and the direction of
blade movement.
2. If the arrows on your fan are near the
terminals, refer to Part A of the detail
and use 6-32 x 1/2" hardware to mount the
four corners of thefan to the panel. Be sure
one of the ait flow arrows points toward
the panel as shown.
3. If the arrows on your fan are on the curved
portion of the frame, refer to Part B of the
detail and use 6-32 x 1/2" hardware to
mount the four corners to the panel. Be sure
the air flow arrows point toward the
panel as shown.
Refer to Pictorial 6-6 while you perform the follow-
ing steps.
9
Reposition the center panel as shown in the
Pictorial.