Roland RE-501 - Page 9

JULY
11,1980
RE-501
/SRE-555
D105, 106
:
lSR-35-200
R.
HEAD
£.liEAD
2SA733-
P or
Q
2SG1815-OR
Q103,
106,
100
:
2SD880-Y
Q104-105,
107,
110,111
114
=
2SD571-L
MOTOR SPEED CONTROL
:
J1PC4558D
D104
:
05Z-5.6L
or
680—
5.6L/EB-2
RD5.6EB2
'*206=220-5.
6eLj
HALL IC
MOTOR
operates
from separate
two
DC
sources
.
Switching transistors
(Q107,
110, 111,
114),
when excited by hall
ICs,fire
alternately
through each
L
the
main winding.
Back
e.m.f. of
L is
rectifiered through
D
(D107-110),
smoothed and
is fed to
pin
6
of.
IClOOh. IClOOb
compares back
e.m.f.
with
reference voltage
(from
REPEAT RATE
CONTROL)
and
the
consequent output
of
IClOOb
varies
Q106
base
bias to control
the
current
flowing
into the
main
winding.
PS-66
109
.0
ORN
no
. 0
-
BLK
<>
111
ORN
112
YEL
113|
YEL
117V
F4
SGA
1A
(008-0
26)
GRN
r - - 1
blk
o
BLK
WHT
Power
5W
E5B-70271T
a;
Ch
kb
WHT
WHT
T2
022-089C
Terminal
Strip
PS-66
109
.6
ORN
110
BLK
c>
111
6
ORN
112
YEL
6
YEL
F4
220V
CEE
T
400mA
(0
08-
062)
RED
WHT
r
Power
5W
E5B-70293I
47
WHT
WHT
BLU
113
T2
022-089D
Terminal Strip
I
F4
240V
CEE
T
400mA
(
008
-062
RED
6-or\jc
>-<y
BLK
0
WHT
0-
BLI^
Wh
Terminal Strip
T2
022-089D
9