Roland DS-90A - Circuit Diagram (Analog Sheet) 4;4

DS-90/90A Feb. 2000
15
4700p/250V
F1
Frame Ground
(Mute Section)
INLET BOARD
POWER AMP BOARD
(Power Supply Section)
POWER AMP BOARD
Frame Ground
+30V ~
~ -30V
+25V
-25V
MUTE
-15
+
5A
A
A
A
+
15
+
15
+
5A
A A AA
-15
+
15
-15
+
15
TER8
FASTEN
1
TER5
FASTEN
1
TER4
FASTEN
1
TER7
FASTEN
1
JK1
PWI-1818
2
1
FH2
HTF-015
FH1
HTF-015
C50
PY17FY
TER6
FASTEN
1
IC4 NJM7815FA
IN
1
OUT
3
GND
2
IC5 NJM7805FA
IN
1
OUT
3
COM
2
IC3
NJM7915FA
IN
2
OUT
3
COM
1
D2
CP1002
+-
~
~
2 3
14
D9
1N4004G
1 2
D8
1N4004G
1 2
C19
0.1
C18
0.1
C1
EC8472MH
472/250
C21
100/35
C9
10000/35
C8
10000/35
C27
100/35
TER3
FASTEN
1
TER1
FASTEN
1
TER2
FASTEN
1
C26
2200/25
C30
0.1
R46 SQP5W (7W)
82
D3
1N4004G
1 2
D1
1N4004G
1 2
R75
100k
C23
10/35
R66
47k
R65
100k
R69
47k
Q26
2SC1815GR
3
1 2
R70
100
R77
47k
Q25
2SA1015GR
3
2 1
R72
47k
C29
47/35
Q21
2SC1815GR
3
1 2
C20
100/35
R78
100k
CN3
6P-SAN
TO
DA BOARD CN1
1
1
2
2
3
3
4
4
5
5
6
6
CIRCUIT DIAGRAM (ANALOG SHEET) 4/4