Roland SH-2000 - Adjusting VCF DC Balance; Adjusting VCF Cutoff Frequency

NOV 10 1977 SH-2000
ADJUSTMENT AND CHECKING
5. ADJUSTING VCF DC BALANCE
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*This adjustment applies only for VCF-2A. For unit with VCF-2, this adjustment is unnecessary.
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Setting: Tablet ...... Hold - on
Filter Manual - on
Panel ....... Cutoff Freq - 5
Resonance - 10
Modulation - 0
Oscilloscope Range:
0.02V /cm, 1 Oms/cm
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VR101 VR103 VR102
VCO TUN OFFSET WIDTH
VR207 VR203 VR205
VCF
BALANCE VCF WIDTH DC BALANCE
VR201 VR204 VR202 VR206
NOISE RESONANCE VCF CUTOFF VCA OFFSET
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VCF-2A
With C2 key down, set VR207 (VCF BALANCE control) on VCF-2A board so that the maximum
oscillation frequency is obtained without distortion,.
*Depress F 1 and F4 keys alternatively and make sure that no "swing" occurs before the frequencies
are stabilized.
6. ADJUSTING VCF CUTOFF FREQUENCY
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Setting: Tablet ...... Singing Voice - on
Hold - on
Panel . . . . . . Cutoff Freq - 5
Resonance - 10
Modulation - 0
Osci11oscope Range:
0.5V /cm, 1 ms/cm
Singing
Hold Voice
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VR101 VR103 VR102
VCO TUN OFFSET WIDTH
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VR207 VR203 _l VR205
VCF BALANCE VCF WIDTH ' DC BALANCE
VR201 VR204 VR202 VR206
NOISE RESONANCE VCF CUTOFF VCA OFFSET
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VCF-2A
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