Roland SH-3A Manual de operación y mantenimiento
!;
■■-■■'/
ELECTRONIC
MUSICAL
INSTRUMENT
ROLAND
SYNTHESIZER
SH-3A
}•'■ -
A
THE
5th
EDITION
Printed
in
Japan.
'76.Apr.
APPLIED
FROM
SERIAL
No.270800
CONTENTS
1.
SPECIFICATIONS
2
2.
GENERAL CIRCUIT
DIAGRAM
4
3.
CONTROL
CIRCUIT
5
3-1.
CONTROL
CIRCUIT
BLOCK
DIAGRAM
5
3-2.
FILTER
BOARD
ASSEMBLY
(FL-5)
6
3-3.
PACK
No.7B
ASSEMBLY
7
4.
VCO
CIRCUIT
8
4-1.
VCO
PULSE
BOARD
ASSEMBLY
(OP-9A)
8
4-2.
PACK
No,8
ASSEMBLY
12
4-3.
PACK
No.4
ASSEMBLY
12
5.
VCF-VCA
CIRCUIT
13
5-1.
VCF-VCA
BOARD
ASSEMBLY
(OP-1OB)
13
6.
POWER
SUPPLY
CIRCUIT
17
6-1.
POWER
SUPPLY
BOARD
ASSEMBLY
(PS-12C)
17
7.
ADJUSTMENT
18
7-1.
PREPARATION
18
7-2.
VCO
TUNING
18
7-3.
VCA
ADJUSTMENT
18
7-4.
CLICK
BIAS
ADJUSTMENT
18
7-5.
RESONANCE
ADJUSTMENT
19
7-6.
ADSR
ZERO
ADJUSTMENT
19
7-7.
VCF
OCTAVE
ADJUSTMENT
19
7-8.
CHORUS
ADJUSTMENT
19
7-9.
NOISE
ADJUSTMENT
20
8.
PARTS
LIST
21
ELECTRONIC
MUSIC
SYNTHESIZER
MODEL
SH
-
3A
ROLAND
SYNTHESIZER
1.
SPECIFICATIONS
*
44Keys(F
Scale)
Note
can
be
raised
or
lowered
by
one
octave
via
Transpose
switch.
*
VCO
Assembly(Voltage
Controlled
Oscillator).
5
Octave
Combination(32»,
16',
81,
4f,
2«)
5
Waveform
Selector
••••
••
•••••
5
Modulation
Waveform
Selector
(N\/njAv
)
3
Modulation
Depth
Control
(VIBRATO)
1
Pitch
Control
1
Glide
Switch
1
Portamento
Time
(PORTAMENTO)
1
Portamento
OFF
Switch
(OFF)
1
Transpose
Changeover
Switch
(
L/M/H
)
1
8f
Chorus
Speed
Control/OFF
(81
CHORUS)
1
Sampler
Sampled
Waveform
Selector
(MODE -
OFF//WIm/a/s/RANDOM)
1
Sampling
Time
(SAMPLE
TIME)
1
Sampling
Level
Control
(LEVEL)
1
*
VCF
Assembly
(Voltage
Controlled
Filter)
Filter
Resonance
Control
CUTOFF
FREQ
1
RESONANCE
1
Modulation
Waveform
Selector
(
Ns/fLJ
If\j
)
••••
•••
1
Modulation
Depth
Control
(GROWL)
1
Envelope
Selector
(ADSR//1
/a_
)
•
1
Envelope
Sensitibity
Control
(SENS)
1
*
VCA
Assembly
(Voltage
Controlled
Amplifier)
Modulation
Waveform
Selector
(N\/rLl/rVy
)
l
Modulation
Depth Control
(TREMOLO)
1
Envelope
Selector
(ADSR/./T
/A.
/
J~"L
)
1
Hold
Control
1
OUTPUT
Level
Control
(OUT
LEVEL)
1
*
Others
Envelope
Control
4
Attack
Time/Decay
Time/Sustain
Level/Release
Time
Low
Frequency
Oscillator
1
Rate
••••••••••
1
Low
Frequency
Oscillator
2
Rate
•
• •
3
Low
Frequency
Oscillator
2
Delay
Time
Control
1
Noise
Cenerator
Level
Control
1
White/Pink
Noise
Changer
1
Noise
Input
Selector
•
]
Phones
Level
Control
!)
Tuning
(
on
rear
Panel)
]
OUTPUT
Jack
1
OUTPUT
VOLTAGE
CHANGEOVER
SWITCH
(L/M/H)
]
PHONES
Jack
1
Jack
for
VCO
CONTROL
1
Jack
for
VCF
CONTROL
1
-
2
-
Voltage
Changer
(for
changing
AC
voltage)
*
Power
Source
*
Power
Consumption
Dimensions
*
Weight(Net)
*
Accessories
Accessories(optional)
+-*
*•♦*+
9
25OV
5O/6OHZ
W
;
1005mm
(40.2")
D
5
320mm
(12.8")
H
;
150mm
(
6.0")
14.5
Kg
(32
Lbs.)
Music
Rack
Conection
Cord
(2.5m
with
Pin-Plug
Adaptor)
Volume
Control
Pedal
FV-1
(for
controlling
Sound
Volume,
VCO
GLIDE
effect
or
VCF
CUTOFP'-
PREQUENCY)
SPECIFICATIONS
SUBJECT
TO
CHANGE
WITHOUT
NOTICE
Note
:
Specifications
changed
from
3H-3
VCF-VCA
BOABD
A33E?.'3LY
Some
Potentiometers
ADJUSTMENT
2.
GENERAL
CIRCUIT BLOCK
DIAGRAM
,
3.
CONTROL CIRCUIT
3-1.
Control
Circuit
Block
Diagram
VCO
FULSE BOARD
Of~tO
VCP-VCA
BOAPJ)
-
5
-
3-2
FILTER
BOARD
ASSEMBLY
(FL-5)
(Serial
mimber
XX254
9
and
below)
A.Parts
Layout
EVA-QOAAOOA14
MR.
/OKA
ZKW
/0kA
m/\
-
6
-
3-2.
FILTER
HOARD
ASSEMBLY
(FL-5)
(Serial
number
XX2550
and
above)
A.
Parts
Layout
Tr
:
/>.
US
2473
:
SV/t
toK
A
EVA-QOAAO0A/4
-6
1-
3-2.
KILTER
BOARD
ASSEMBLY
(FL5)
(Serial
number
XX2550
and
above)
A.Parts
Layout
-6-2-
3-3.
PACK
Na7fi
ASSEMBLY
(Serial
Nwniter
XX2549
ami
below
)
A.
I'ar
I
s
Layout
5s
\
1HI
[
®
©
DID
B.
Circuit
Diagram
(Pack
No.7B)
r
9—'
LFO-2
—W-j—
©
C4fZ
4>7M
iook
im
(ok
/yor^^rm
W7
/OK
)LFO-|
i7WP
I
\lffil
'
-
7
-
ru
J
LFO-Z
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