Chapter 7 Troubleshooting; Maintenance; Common Problems; Power Problems - Kurzweil sp88x User Manual

Chapter 7
Troubleshooting

Maintenance

Aside from normal care in handling and use, your Stage Piano requires no regular
maintenance. Clean with a soft cloth dampened with water. Never use abrasives or
solvents as they may damage the unitÕs paint, markings, info strip and display lens.
There are no batteries inside to replaceÑever. Instead of volatile SRAM used in most
other instruments, your Stage Piano uses nonvolatile EEPROM for storage, which
retains information as captured electrons, without power.

Common Problems

Below is a list of the most commonly encountered problems and diagnoses for each.

Power Problems

This is the normal power-up sequence:
1. Short pause (less than one second)
2. All LEDs turn on for 1 second
3. 1 second pause
4. Normal operation (Internal Voices mode, Grand Piano 1 selected).
If nothing at all happens when you turn the power switch on (white dot pressed in),
check these items:
¥ Power module not plugged securely in wall outlet.
¥ Cord from power module not fully plugged into Stage Piano.
¥ Input voltage rating of power module does not match your power system.
¥ Incorrect or defective power module. The power module speciÞcations are: 12V
DC, 0.5 amp, center pin positive, 5.5mm OD, 2.5mm ID coax type plug.
¥ Dead wall outlet, power strip, or extension cord.
If thereÕs evidence of life but operation isnÕt quite normal, check these items:
¥ Input voltage rating of power module does not match your power system.
¥ Incorrect or defective power module. See above for power module specs. Voltage or
current rating less than speciÞed will cause unusual or intermittent operation.
¥ Power system voltage abnormally low. Try a different, unused outlet.
¥ Intermittent operation can be caused by a replacement power module with the
wrong size plug. The correct plug Þts snugly into the jack, and doesnÕt wobble.