Manual Part 2

59
TROUBLESHOOTING (ADULT SUPERVISION RECOMMENDED)
Elenco
®
is not responsible for
parts damaged due to incorrect
wiring.
Basic troubleshooting:
a. Most circuit problems are due
to incorrect assembly, always
double-check that your circuit
exactly matches the drawing for
it.
b. Be sure that parts with
positive/negative markings are
positioned as per the drawing.
c. Be sure that all connections are
securely snapped.
d. Try replacing the batteries.
e. For circuits using the
phototransistor (Q4), if the
alarm is always activated then
it could be getting triggered
by other lights in the room; try
turning them off or moving to a
different room.
If you suspect you have damaged
parts, you can follow this
procedure to systematically
determine which ones need
replacing:
1. White LED (D6), color LED (D8),
lamp (L4), melody IC (U32),
motor (M4), and battery
holder (B3): Place batteries in
holder. Place the lamp directly
across the battery holder, it should
light. Place the white LED, and
color LED directly across the
battery holder (LED + to battery
+), the LED should light. Similarly,
place the melody IC directly
across the battery holder (+ to +),
it should make sound. Place the
motor directly across the battery
holder, the shaft should spin (you
can place the green fan on the
shaft so the spinning is easy to
see). If none work, then replace
your batteries and repeat, if still
bad then the battery holder is
damaged.
2. Jumper wires: Use this mini-
circuit to test each jumper wire,
the LED should light.
3. Snap wires: Use this mini-circuit
to test each of the snap wires, one
at a time. The LED should light.
4. Vertical snap wires (V1): Use
this mini-circuit to test each of the
vertical snap wires, one at a time.
The LED should light.