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985-40000-01090 Rev.A
2021-02-16
Condential, for internal use only. Not to be reproduced.
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Synthesizers and Samplers
PRO -1
OSCB Calibration
Turn on the OSCB SAW switch and KYBD.
On your external keyboard, press the A1 key and adjust the OSCB FREQUENCY on the front panel while
observing the tuner display.
On your external keyboard, press the A4 key and adjust the OSCB SCALE trimmer while observing the tuner display.
Repeat steps 3 and 4 until both frequencies are correct A1 - 55 Hz and A4 - 440 Hz.
On your external keyboard, press the A7 key and adjust the OSCA TRIM trimmer while observing the tuner display.
Turn OFF the OSCA SAW switch.
Press A1 key again check how much the frequency has drifted and adjust this frequency with
OSCA OFFSET trimmer back to 55 Hz.
On your external keyboard, press the A4 key and adjust the OSCA SCALE trimmer while observing the tuner display.
This should be trimmed to 440 Hz.
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