-16-
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 __________ __________ __________.
Answer
s:1.
wires;2.
electrical w
aves;
3.frequency;
4.m
usic;5.
over
tones;6.
784;7.
timbre;8.
beat;
9.tempo;
10.pr
inted circuit boards.
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 [email protected] if you need
further assistance. DO NOT contact your place of purchase as they will not be able to help you.
Содержание AK-900
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