Elenco DataCom Tester Kit - Manual (Page 7)

Figure B
Mount the LED with the tubing and
plastic spacer to the PC board as
shown. Note the flat side of the
LED and the PC board marking.
ASSEMBLE THE FOLLOWING COMPONENTS TO THE PC BOARD
In all of the following steps the components must be installed on the top legend side of the PC board. The
board is turned to solder the component leads on the foil side.
R17 - 1kΩ 5% 1/4W Resistor
(brown-black-red-gold)
(see Figure A)
D19 - LED Red
Tubing
Spacer
(see Figure B)
R9 - 3.3MΩ 5% 1/4W Resistor
(orange-orange-green-gold)
(see Figure A)
Q2 - 2N3904 Transistor NPN
(see Figure C)
D17 - 1N4001 Diode (epoxy)
(see Figure D)
Q3 - 2N3904 Transistor NPN
(see Figure C)
U4 - 14-pin IC Socket
U4 - 40106 IC Hex Inverter
(see Figure E)
SW1 - Push Button Switch
(see Figure F)
R16 - 5.6kΩ 5% 1/4W Resistor
(green-blue-red-gold)
(see Figure A)
C2 - 22µF Electrolytic
(see Figure G)
R15 - 12kΩ 5% 1/4W Resistor
(brown-red-orange-gold)
(see Figure A)
R12 - 1kΩ 5% 1/4W Resistor
(brown-black-red-gold)
(see Figure A)
D18 - 1N5235 Zener Diode 0.5W
(see Figure D)
Battery Snap
(see Figure H)
Q1 - 2N3906 Transistor PNP
(see Figure C)
Figure A
Mount the resistor
flat against the PC
board as shown.
Figure D
Diodes have polarity. Mount the
diodes in the direction marked on
the PC board as shown.
Polarity
Marking
Polarity
Marking
Epoxy
Zener
-6-
Figure F
IMPORTANT!!! Mount the push button
switch as shown. The circle MUST be
facing the other direction from the marking
“SW1” on the PC board.
Figure G
Electrolytic capacitors have polarity. Be sure
to mount them with the negative (–) lead
(marked on the side) in the correct hole.
Flat Side
Spacer
LED
Tubing
Figure C
Mount the
transistor to
the PC board
noting the flat
side.
Flat Side
Figure E
Insert the IC socket into the PC board with the
notch in the direction shown on the top
legend. Solder the IC socket into place.
Insert the IC into the socket with the notch in
the same direction as the notch on the socket.
Notch
Notch
Marking
Figure H
Mount the battery
snap as shown.
The black (–) lead
goes to –B and
the red (+) lead
goes to +B.
Circle
Red Lead
Black Lead
(–) (+)
1/8”
Warning:
If the capacitor is connected
with incorrect polarity, it may
heat up and either leak, or
cause the capacitor to
explode.
Polarity Marking