User Manual

Advanced Troubleshooting (Adult supervision recommended)
-10-
Elenco
®
is not responsible for parts damaged due to incorrect
wiring.
If you suspect you have damaged parts, you can follow
this procedure to systematically determine which ones
need replacing:
1. Red LED(D1), green LED(D2), red/yellow LED(D10),
speaker (SP2), and battery holder(B3): Place batteries in
holder. Place the red/yellow LED directly across the battery
holder in both directions, it should light red or yellow depending
on which side was positioned towards the battery “+” side. Do
the same for the red and green LEDs, but be sure to position
their “+” side towards the battery “+” side. “Tap” the speaker
across the battery holder contacts, you should hear static as it
touches. 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. Slide switch (S1) and press switch (S2): Build project 1; if
the red LED (D1) doesn’t light then the slide switch is bad.
Replace the slide switch with the press switch to test it.
6.
Alarm IC (U2): Build project 169; you should hear a siren.
Variants 1, 2, 3, and 4 should change the sound, but the sound
for variant 4 may be the same as one of the others.
7.
PNPtransistor (Q1): Use project 158 to test it.
8.
NPNtransistor (Q2): Use project 159 to test it.
9. Selector (S8): Use project 92 to test it.
10.
Disco motor (DM): Build project 10. The shaft should spin,
and red, green, and blue LEDs should light.
11. Programmable fan (M8): Connect it as shown in project 15.
It should slowly cycle through 6 phrases (unless you erased
all messages without programming in new ones). You should
be able to change the messages displayed using the
instructions in project 15.
Warning: If you erased all messages, then the part will not
display any messages until you program in new ones, as per
the instructions in project 15.
Note: After several hours of continuous use, the fan message
may be erratic, not clear, or even have no display. Turn off for
5 minutes, and it will be back to normal again.
12.
LED-MC (U29, the LED display & microcontroller): Use
project 98 to test it.
ELENCO
®
150 Carpenter Avenue
Wheeling, IL 60090 U.S.A.
Phone: [phone]
Fax: [phone]
e-mail: [e-mail]
Website: www.elenco.com
You may order additional / replacement parts at:
www.snapcircuits.net