Elenco Burglar Alarm - Manual (Page 6)

ASSEMBLE COMPONENTS TO THE PC BOARD
-5-
Figure C
Diodes have polarity. Mount
them with the band in the
correct direction, as shown
on the PC board.
A1 - Buzzer
C1 - 47µF Electrolytic Cap.
(see Figure A)
SCR1 - SCR (106B1)
(see Figure B)
D1 - 1N4001 Diode
(see Figure C)
R2 - 39kΩ 5% 1/4W Resistor
(orange-white-orange-gold)
C2 - .1µF (104) Mylar Cap.
D2 - 1N4001 Diode
(see Figure C)
Black
Red
Blue
B1 - Battery Snap - Insert the red
and black wire through the hole in the PC
board as shown. Install the red wire into
the positive (+) hole and the black wire into
the negative (–) hole. Solder and cut off
the excess leads.
S1 - Slide Switch
R1 - 39kΩ 5% 1/4W Resistor
(orange-white-orange-gold)
Figure B
Mount the SCR in the same direction as marked on
the PC board. Be sure that the metal backing is in the
direction shown.
Metal
Backing
With Beveled Edge
Figure A
Electrolytic capacitors have polarity.
Be sure to mount them with the
negative (–) lead (marked on side) in
the correct hole.
Warning: If the
capacitor is
connected with
incorrect polarity,
it may heat up
and either leak or
cause the
capacitor to
explode.
Polarity
marking
(–) (+)