Use The Right Impedance, Taper, And Range; If None Of The Aboveé; Service Centers - Kurzweil sp88x User Manual

Troubleshooting

Service Centers

Use the Right Impedance, Taper, and Range

For best results, use a Kurzweil CC-1 control pedal, available from your dealer. The
CC-1 meets all of the requirements described below at an economical price.
A control pedal should have an impedance between 5,000 and 100,000 ohms. Less than
5,000 may overload the reference voltage source in the Stage Piano and interfere with
operation of other controls like the Volume/Controller slider. More than 100,000 may
result in electrically noisy operation, which may cause your Stage Piano to send MIDI
Controller messages constantly.
The taper of the control should be linear for easy, predictable control. Pedals designed
for volume control will typically have most of their range concentrated in the upper
half of travel. To check taper, run the Control Pedal diagnostic and check the reading
when the pedal is pressed halfway down. If itÕs less than 100, then it has an audio
taper and will probably be difÞcult to use.
Pedals may have a control range that is less than 100%. To check this, run the Control
Pedal diagnostic and check the reading at both extremes of pedal motion. 100% is a
minimum reading of 0 or 1 and a maximum of 254 or 255. If one end is OK but doesnÕt
quite reach 100% on the other end, it may be possible to adjust the linkage or gear to
properly center its range.
If None of the Above...
If your problem is not covered above, or none of the suggestions seems to work, Þrst
check back and review the relevant sections of this manual. Many difÞculties are just
programming problems caused by inappropriate settings of setup parameters. If you
want to be sure that all of the factory defaults are in place, refer to Restoring Factory
Defaults on page 7-6.
Also be sure to check out KurzweilÕs Internet web site for additional Stage Piano
information that may have been published since this manual was written:
www.youngchang.com/kurzweil
Service Centers
Contact the nearest Young Chang ofÞce listed below to locate your local Young Chang
/ Kurzweil representative. See page iii for a list of Young Chang distributors world-
wide.
7-5