Kurzweil PC88 - Page 91

Chapter 4
Troubleshooting
A section of notes dead
1;
4,
Remove the Contact Board that relates to the
missing section of notes.
Check contacts for dirt, damage or wearing. If dirty,
remove debris, clean with denatured alcohol and
reinstall. Replace contact strip if damaged or worn.
If problem persists, remove strip and check board
for shorts, cold solder joints or open diodes.
If necessary, order circuit board replacement.
Middle C Dead
1.
Check small interconnect cable that connects the
Bass and Treble boards. If this cable is disconnected
from either the Treble or Bass Contact Boards,
Middle C will not sound. However, all other notes
should play normally.
Disconnect and reseat it, if necessary.
Check solder connections.
If Middle C is still dead, remove the Treble Contact
Board.
Check the contact strip. Make sure the contact is
seated properly, clean and clear of any foreign
matter on both sides of the strip.
PC88 Service Manual
4-11