Kurzweil HUB7, Manual, Page: 52 / 56

RSP8 Diagnostics and Troubleshooting
Appendix A-10
Communication errors (bad characters on screen,
flickering LEDs)
1. Defective cable.
2. KSP8 power cord is not grounded.
3. Excessive ground potential difference between KSP8(s) and
HUB7/RSP8. Try insulating the Hub-7 and/or RSP8 enclosure
from other equipment enclosures.
Joystick does not have full range of parameter control
1. Run the Joystick Calibration (EEProm Init) diagnostic.
2. Defective joystick, run Controls diagnostic to verify.
At power up, display reads “EEPROM read or
checksum error” then enters diagnostics about 10
seconds later.
1. Run the joystick calibration as requested. If this happens more
than once, the EEPROM chip on the CPU board needs
replacement but you may continue to use the unit until it is
replaced.
At power up or when entering diagnostics, display
reads “Button XXXXXXXX is stuck down”.
1. Pull up the indicated button if visibly stuck down.
2. A conductive particle has become lodged in the internal
wiring. Unplug, remove the bottom cover, and shake smartly to
dislodge.
3. The indicated switch may have become defective.
4. To try running anyway, press the soft button marked “OK”.