Heathkit SB-1000 - Page 48

Page 50
hole A). Then use two 6-32 x 1/4" screws and
two #6 lockwashers to mount the indicated
corners of the circuit board to spacers BX and
BY.
Route the free end of the blue wire coming from
the meter circuit board as shown. Then connect
the end of the wire to filter circuit board hole B
(S-1). Cut off any excess wire end.
Route the free end of the red wire coming from
the meter circuit board as shown. Then connect
the end of the wire to filter circuit board hole A
(S-1), Cut off any excess wire end.
Use a cable tie to secure the blue and red wires
to spacer BY. Cut off the excess cable tie.
ing from cable clamp CD to circuit board hole E
(S-1).
Cut both red power transformer leads to 6" and
both yellow power transformer leads to 9".
Then remove 1/4” of insulation from the end of
each of these leads.
Tl: Set the power transformer in the main
chassis as shown. Then refer to Detail 6-17C
and use 1/4” x 1" hardware to secure it to the
chassis. NOTE: To start each nut onto its screw,
you may wish to push the smaller end of the nut
starter into the nut as shown in the inset
drawing.
vA Connect the free end of the large red wire com-
WY
iy
NOTE: Make mechanically secure connections when
you connect the power transformer leads in the fol-
lowing steps.
,(% Connect the green-yellow power transformer
; lead to terminal strip CB lug 1 {S-2).
WA Conncct either green power transformer lead to
! terminal strip CB lug 3 (S-1). NOTE: A black
wire was previously soldered to the eyelet of
this lug.
na
Connect
the
remaining
green
power
transformer
: lead to terminal strip CB lug 4 (S-1). NOTE: A
black wire was previously soldered to the
eyelet of this lug.
amcnes) 2
Heathkit
NOTE: When you solder one of the red wires power
transformer Icads to filter circuit board hole D, in
the next step, be careful not to burn the insulation on
the nearby black wire.
Loosely twist together (approximately 1 turn-
per-inch) the two red power transformer leads.
Then connect the end of either lead to filter
circuit board hole D (S-1). The other red power
transformer lead will be connected later.
Position the rectifier circuit board near the filter cir-
cuit board. Then connect the wires coming from the
rectifier circuit board as follows:
LD Red wire to filter circuit board hole F (S-1).
Ww Black wire to filter circuit board hole C (S-1).
Y Refer to Detail 6-17D and use four 6-32 x 1-1/4"
screws, four 3/4" spacers, and four #6 lockwash-
ers to mount the rectifier circuit board and filter
circuit board to spacers BT, BU, BV, and BW.
yf Connect the end of the remaining red power
transformer lead to rectifier circuit board pin B
(S-1).
$) Loosely twist together the two yellow power
transformer leads. Then connect either lead to
meter circuit board hole A (S-1) and the other
lead to hole B(S-1).
() Connect the free end of the black-white power
transformer lead to barrier strip RD lug 5 (S-1).
NOTE: Two other wires were previously
soldered to the other hole in this lug.
) Connect the free end of the brown-white power
transformer lead to barrier strip RD lug 4 (S-1).
9 Connect the free end of the black power trans-
former lead ‘to barrier strip RD lug 3 (S-1).
NOTE: A wire was previously soldered to the
other hole in this lug.
7
y Connect the free end of the brown powcr
transformer lead to barrier strip RD lug 2 (S-1).
NOTE: A wire was previously soldered to the
other hole in this lug.
vu