Roland SH-2000 - Adjusting Key Voltage; Adjusting VCA Balance

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NOV 10 1977 SH-2000
ADJUSTMENT AND CHECKING
2. ADJUSTING KEY VOLTAGE
Setting: Tablet ...... Hold - on
Popcorn - on
Panel . . . . . . Pitch - center
Random Note
- off
Oscilloscope Range: 1V /cm
VC0-2
JUMPER
IC102
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D
Set VERT IN switch of the oscillo-
scope to GND and adjust VERT
POSITION so that the fly-back line
comes on -3 graduation .. Then set
the switch to DC ..
OSCILLOSCOPE
D
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VR101 VR103 VR102
VCO TUN OFFSET WIDTH
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VC0-2
VR207 VR203 VR205
VCF BALANCE VCF WIDTH
DC BALANCE
VR201 VR204 VR202 VA206
NOISE RESONANCE VCF CUTOFF VCA OFFSET
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VCF-2A
1) With F 1 key held down, adjust V R 103 (Offset control) on VC0-2 to obtain +3V (±20mV). (OV line
when deviated to -3V).
2) With F4 key held down, adjust VR 102 (Width control) on VC0-2 board to obtain +9V (±20mV)
(+6V line when deviated to -3V).
3) Repeat adjustment of steps 1 and 2 until +3V and +9V are obtained. Then check that 5V (±50mV)
and+ 7V (±50mV) are obtained for F2 and F3 respectively.
3. ADJUSTING VCA BALANCE
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Setting: Tablet ...... Repeat - on
Panel . . . . . . Random Note - Auto
Madu lation Rate - 10
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