Basic Troubleshooting:
1. Most circuit problems are due to incorrect assembly, always double-check that your circuit exactly matches the drawing for it.
2. Be sure that the light motor (M7), red/yellow LED (D10, and horn (W1) have their “+” marking positioned as per the drawing.
3. Be sure that all connections are securely snapped.
4. Try replacing the batteries.
Advanced Troubleshooting
(Adult supervision recommended)
:
If you suspect you have damaged parts, you can follow this procedure to systematically determine which ones need
replacing:
1.
Lamp (L4), red/yellow LED (D10), horn (W1), light motor (M7), and battery holder (B7):
A. Place batteries in holder.
B. Place the lamp directly across the battery holder, it should light. C. Do the same with the LED, it should light red or yellow,
depending on how you oriented it.
D. Do the same with the horn (horn + to b), it should make an annoying sound.
E. Do the same with the light motor (motor + to b), it should spin to the right and its lights should be on.
F. If nothing works, then replace your batteries and repeat, if still bad then the battery holder is damaged.
2.
3-snap wires:
Build the Lamp circuit (on page 8), but replace the slide switch (S1) with a 3-snap wire; if the lamp (L4) does
not light then one of the two 3-snap wires in the circuit is broken. Systematically test all four 3-snap wires in your set.
3.
Slide switch (S1) and press switch (S2):
Build the Lamp circuit (on page 8); if the
lamp (L4) does not light then the slide switch is broken. Replace the slide switch with
the press switch and test it in the same way.
Customer Service
Call toll-free: (800) 533-2441
e-mail: [email protected]
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Troubleshooting
SCB-20 Manual_050115.qxp_SCB-20 Draft 5/26/15 4:26 PM Page 5
