Troubleshooting; Component Check; Word Glossary - Elenco Electronics SP-3B Assembly And Instruction Manual

TROUBLESHOOTING

If you are a student, and any parts are missing or
damaged, please see instructor or bookstore. If you
purchased this solder practice kit from a distributor,
catalog, etc., please contact Elenco
(address/phone/e-mail is at the back of this manual)
for additional assistance, if needed.
If you are experiencing a problem, first read the
theory of operation to familiarize yourself with the
operation.

Component Check

1. Be sure that all components have been mounted
in their correct places.
2. Make sure that C1 and C2, the electrolytic
capacitor is mounted correctly. The negative lead
should be in the hole as shown on the top legend.
3. Have LEDs LED1 and LED2 been installed
correctly? The flat side of their bodies should be
in the same direction as marked on the top
legend. If the LEDs are in backwards, they will not
light.

WORD GLOSSARY

Capacitor
Cold Solder Joint
Flux
Heat Sinking
Integrated Circuit (IC)
Jumper Wire
LED
Light Emitting Diode
Oxidation
Polarity
Printed Circuit Board
® Electronics
An electrical component that can store electrical pressure (voltage) for periods of
time.
Occurs because insufficient heat was applied or the connection was moved before
the solder had set. Connection looks crystalline, crumbly, or dull.
A substance that is used to cleanse the surface of oxide before it is soldered. Always
used in electronics work. Most of the solder used in electronics has flux built right into it.
A process of keeping the component from becoming overheated during soldering.
Any metal object that can be clamped to the component lead will work as an effective
heat sink. An alligator clip or pliers work well.
A type of circuit in which transistors, diodes, resistors, and capacitors are all
constructed on a semiconductor base.
A wire that is connected from one place to another on a PC board, thereby making a
connection between two pads.
Common abbreviation for light emitting diode.
A diode made from gallium arsenide that has a turn-on energy so high that light is
generated when current flows through it.
Most metals, when exposed to air, form an oxide on their surface which prevents
solder from adhering to the metal.
The division of two opposing forces or properties.
A board used for mounting electrical components.
Components are connected using metal traces "printed" on the board instead of
wires.
4. Pay close attention to the red and black wires of
the battery snap. The red wire should be installed
in the positive (+) hole and the black wire in the
negative (–) hole. Snap in a fresh 9-volt battery.
Problems
1. No LEDs Light
• Check the solder connections for the battery
wires and switch.
• Check that all parts are in the correct way.
2. LED1 Does Not Light
• Check C1, LED1 and Q1.
3. LED2 Does Not Light
• Check C2, LED2 and Q2.
4. LED1 or LED2 is Always On
• Check C1 and C2 for opens.
• Check Q1 and Q2 for shorts.
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