Roland SH-5 - OP-21 Module Adjustments

1976-10-30 SH-5
12-6 OP-21
(Speaker and amplifier are handy for the following)
VCA BAL.-1
(VR507) ! jV
CUT OFF-T
(VR5O8) j
CIRCUIT BOARD
ASSEMBLY
(OP-21) OSCILLOSCOPE
12-6-1 VCA Cutoff
Turn VR-508 all the way right; then turn left until signal just disappears. Make final adjustment with
oscilloscope in most sensitive range (lower than 0.02V).
-4+++
Gain check
Change the VCA HOLD control to "10" and confirm:
3-4 Vpp
While tapping a key on the keyboard, adjust VR-507 for minimum ADSR click.
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Scan by Manual Manor
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