Troubleshooting Guide - Elenco Electronics AK-900 Assembly And Instruction Manual

TROUBLESHOOTING GUIDE

Symptom: Keyboard doesn't work at all.
Make sure that the batteries are new and that they are installed with the correct polarity. If using the optional
AC/DC Adapter then make sure it is undamaged and plugged in.
Make sure the ON/OFF switch is ON. Make sure the volume controls are not at the lowest setting.
If the red LED next to the ON/OFF switch is off then flip the ON/OFF switch several times, pressing it hard.
Be sure that none of the wiring connections were broken, are contacting any other metal (creating a "short
circuit"), or are wired wrong.
Be sure that there is no physical damage to the Main PCB.
Symptom: Sounds don't sound normal, as if out-of-tune.
Make sure that the batteries are new and that they are all installed with the correct polarity. Alkaline or carbon
zinc batteries are preferred.
Symptom: Some of the keys, buttons, or switches do not work.
Be sure all the keys, buttons, and switches are properly situated as in assembly steps 2-5.
Examine the Cushions on the Circuit Board, make sure they are laying flat on the Board and that they are not
damaged.
Be sure there is no physical damage to the components or copper traces on the Circuit Board.
Note: Contact Elenco Electronics, Inc. at (847) 541-3800 or e-mail us at elenco@elenco.com if you need
further assistance. DO NOT contact your place of purchase as they will not be able to help you.
QUIZ
1. Sound waves travel through air just as electrical waves travel through __________.
2. A microphone converts sound waves into __________ __________.
3. Pitch is the musician's term for __________.
4. Mechanical variations in a loud and unpredictable manner will seem more like noise than __________ to a
listener.
5. Traditional music instruments produce many __________ for each fundamental.
6. Musical note G5 has a frequency of __________ Hz (refer to the musical scale).
7. The main properties of a musical sound are loudness, pitch, and __________.
8. Two tones, with frequencies of 250 Hz and 255 Hz and similar loudness, will produce a __________ when
played together.
9. ________ is adjusted in the AK-900 by changing the rate at which a tone pattern is played from memory.
10. Long, thin copper traces connect electronic components on __________ __________ __________.
beat; 8. timbre; 7. 784; 6. overtones; 5. music;
boards.
4. frequency; 3. waves;
-16-
circuit printed 10. tempo;
electrical 2. wires; 1. Answers:
9.