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15
Advanced Troubleshooting (Adult supervision recommended)
11. Strobe IC (U23) and 100kW resistor
(R5): Build the mini-circuit shown here,
and turn on the switch (S1). The speaker
should make a buzzing sound or U23 is
bad. Next use the 100kW resistor in place
of the 5.1kW resistor; the sound should be
a beeping sound now or R5 is bad.
12. Infrared module (U24): Build project
18, the remote control should turn the red
LED (D1) on; otherwise U24 is bad.
13. 0.1mF capacitor (C2) and 100mF
capacitor (C4): Build this circuit. There
should be a buzzing sound, or C2 is bad.
Next, replace C2 with C4; now you should
hear beeps every 5 seconds, or C4 is bad.
The setting on RV does not matter.
15. Color organ (U22): Do project 83. If parts
A or B do not work, U22 is damaged.
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.
elenco.com/replacement-parts/
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