Block Diagram; Keyboard Circuit Diagram; Power Supply - Roland SH-101 Service Manual

SH-101
BLOCK DIAGRAM
NOV.
1st,
1982
EXT
clk
nv
IN
HOLD
A
LFO
MOD
MOD
GRIP
on
,n
i
BENDER
S3
LFO
MOD
h*-
^
,
vco
ENV
PWM
MOD f
MAN
t
RATE
o
CO
RANDOM g
NOISE
z:
<
or
NOISE
RANDOM
RANGE
016"
8'
L04'
2'
V°^
°
o
vco
SUB OSC
ru
1
OCT
DOW
N
2
OCT
DOWN
O
o
2
OCT
DOWN
NOISE
GEN
NOISE
-r-
ON
OFF
£
D/A
CPU
(Key Assigner, Sequencer,
Arpeggiator
etc)
I
Converter
AUTO
PORTAMENTO
FUNCTION
SW'S
Q
< <
q
S3
Q- °S
o O
=> =5
Q X
CO
<
CO
Q_
32key Keyboard
VCF
A
D
S R
MOD
ENV GEN
ENV
VCF
KYBD
CUTOFF RESO
ENV
VCA
T
PORTA-
MENTO
1
x
n^
TRIG
N
o
GATE
GATE
+ TRIG
Memory
Back-up Battery
GATE GATE
OUT IN
CV
OUT
CV
IN
VOLUME
OUTPUT
SI
AMP
A
PHONES
POWER
SUPPLY
POWER
pv
DC
IN
J?
1.5VX6
*
CEM3340 BLOCK
&
CONNECTION DIAGRAM
FREQ CNTL
INPUT
+15V
A
SOFT
SYNC
INPUT
a
fie
TT5
PRECISION
MULTIPLIER
TEMPCO
GEN
-5V
HARD
SYNC
INPUT
FREQ
TRACK
n PWM
J
L CNTL
INPUT
A
y\
KEYBOARD CIRCUIT
DIAGRAM
SYNTH BOARD OPH177-2
L-
i
-6666666 -- 6666
y.v.
m
uv.v.
T
ttftJJftrttJttJtjttJtfrttf
'o 'o o 'o 'o 'o 'o 'o
o
'o o o o o 'o 'o 'o
o o o o
'o O O O Q
CM
ro
Q
F3 C#4
A4 F5
I
KEYBOARD ASSEMBLY SK-331-AR
C6
ALL DI 1S2473
Technical Information
Effective
from SN-243200.
The CPU may
overrun
if
excessive static electricity
is
fed
through the
jacks, etc.
To
prevent this, the
GND
of
the
GATE OUTPUT
jack on the Jack Circuit Board and
the
GND
lug
on
the
Keyboard
are
connected with
a larger
wire.
It is
advisable that this
precautionary measure
also
be
applied to the models prior to
SN-243200.
If
there
is
an improper connection
in
the Keyboard keys,
clean the contact
(foil
pattern) on the side of the
Switch
P.C. Board with
alcohol.
J
^
J
2