starts up / no sound / all lights lit
2019-03-04 by poly_sixteen@yahoo.com
is there some special tip what to do, press, pull, cut
if the polysix starts up with all lights lit, like this
?
Thread
starts up / no sound / all lights lit
Re: [PolySix] starts up / no sound / all lights lit
2019-03-04 by Bob Grieb
ARP, POLY, UNI, CHORD, and HOLD are all driven by the key assigner CPU
via 4174 chip IC2 on the KLM-366 board. Is the key assigner CPU working
at all? Do the voice LED's respond when keys are pressed? Do any of those
LED's change if you press switches? I guess you could try re-seating the key
assigner CPU in its socket if not, although you'd be pretty lucky if that
had any effect. Maybe check the voltage on the reset input to the key assigner
(pin 4) and make sure it's high (above 2.4 volts) If not, then that chip will be held
in reset and won't turn the LED's off or do anything else for that matter.
Bob
via 4174 chip IC2 on the KLM-366 board. Is the key assigner CPU working
at all? Do the voice LED's respond when keys are pressed? Do any of those
LED's change if you press switches? I guess you could try re-seating the key
assigner CPU in its socket if not, although you'd be pretty lucky if that
had any effect. Maybe check the voltage on the reset input to the key assigner
(pin 4) and make sure it's high (above 2.4 volts) If not, then that chip will be held
in reset and won't turn the LED's off or do anything else for that matter.
Bob