Elenco Snap Circuits SOUND &reg - Manual (Page 18)

Advanced Troubleshooting
(Adult supervision recommended)
9. Keyboard (U26): Build project 92, but
omit the 0.1 m F capacitor (C2) and the
5.1k W resistor (R3). You should hear a
tone when you press any key. Turning the
TUNE knob while pressing any green key
should change the tone slightly. Now add
R3 to the circuit, and you should hear a
continuous tone. If any of this does not
work then the keyboard is damaged.
10. 0.1 m F (C2), 1 m F (C7), and 470 m F (C5)
capacitors: Build project 92; removing
C2 from it should change the tone, or C2
is damaged. Next, replace C2 with C7; the
pitch of the tone should be lower now, or
C7 is damaged. Next, replace C7 with C5;
you should hear a click every few seconds,
or C5 is damaged.
11. Voice changer (U27): Build project 7.
Follow the project’s instructions to confirm
that you can make a recording and play it
back at different speeds.
12. Echo IC (U28): Build the circuit shown at
right, turn it on, and set the knob on the
500k
W adjustable resistor (RV3) to the
right. Press any keys on the keyboard; you
should hear tones with echo, and be able
to adjust echo level using the lever on the
adjustable resistor (RV). Removing the
1
m F capacitor (C7) should reduce the
volume a little. Sometimes an echo IC
problem can be fixed by turning the circuit
off and back on to reset it.
12. Audio Jack (JA) and stereo cable: If
you have headphones, use them to test
the audio jack using project 14. If you have
a music device, use it to test the audio jack
using project 66. Use project 66 to test
your stereo cable.
13. Sound energy demonstration container:
If the flexible sheet is damaged,
disassemble the container and replace the
flexible sheet; this set may have included
a spare for it, or you can use household
plastic wrap.
ELENCO ®
150 Carpenter Avenue
Wheeling, IL 60090 U.S.A.
Phone: (847) 541-3800
Fax: (847) 520-0085
e-mail: [email protected]
Website: www.elenco.com
You may order additional / replacement
parts at: www.snapcircuits.net
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