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Roland Manuals
Recording Equipment
Dr. Sample SP-303
Service notes
Circuit Diagram(Sw) - Roland Dr. Sample SP-303 Service Notes
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Mar.2001
CIRCUIT DIAGRAM(SW)
fig_SW.eps
LED&VR
TO DIGITAL
SIDE CN6
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
CN8
RIBON CABLE 14P
SW SCAN
TO DIGITAL
SIDE CN5
32
CTRL 1
VR2
RK09K 50kB
2
IC33
BU2090F
2
DATA
3
CLOCK
+
16
VDD
C148
0.1
1
GND
+
D
D+3.3V
C150
0.1
D
SW5
CA
1
2
SW8
CA
1
2
SW11
CA
1
2
SW14
CA
1
2
SW17
CA
1
2
CN10
RIBON CABLE 13P
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
13
13
SW5:FILTER+OD
SW8:PITCH
SW11:DELAY
SW14:START/END/LEVEL
SW17:REVERSE
CTRL 3
/MFX
CTRL 2
VR3
VR4
RK09K 50kB
RK09K 50kB
2
2
LED1
R87
270
2
LED3
R89
270
2
R91
270
LED5
2
LED7
R93
270
2
4
LED9
R95
270
Q0
5
2
Q1
6
Q2
7
LED11
R97
270
Q3
8
2
Q4
9
Q5
10
LED13
R99
270
Q6
11
2
Q7
12
Q8
13
R101
270
LED15
Q9
14
2
Q10
15
Q11
R103
270
LED17
2
LED19
R105
270
2
LED21
R107
270
2
LED23
R109
270
2
+
R121
100k
1
Q12
2SA1586GR
R122
470
LED34
1
SW3
SW6
SW20
1
2
SW21
DA1
1SS300
SW9
1
2
SW12
DA2
1SS300
SW15
1
2
SW18
DA3
1SS300
SW3:CANCEL
SW6:MFX
SW20:REC/SONG REG
SW21:RESAMPLE
SW9:VINYLSIM
SW12:ISOLATOR
SW15:TIME/BPM
SW18:D
SP-303
+
LNJ208R8ARA
MARK
1
LNJ208R8ARA
STEREO
1
LNJ208R8ARA
A
1
SML-010LTT86
1
EXT
SOURCE
SML-010LTT86
1
4
SML-010LTT86
8
1
SML-010LTT86
7
1
SML-010LTT86
3
1
SML-010LTT86
2
1
SML-010LTT86
1
6
SML-010LTT86
1
1
SML-010LTT86
1
5
SLR-342VCT32
2
PEAK
D
CA
1
2
1
2
CA
1
2
DA4
1SS300
CA
1
2
1
2
CA
1
2
DA13
1SS300
CA
1
2
1
2
CA
1
2
DA5
1SS300
CA
1
2
1
2
CA
1
2
DA6
1SS300
IC34
BU2090F
2
4
DATA
Q0
5
Q1
3
6
CLOCK
Q2
7
Q3
8
Q4
+
9
Q5
16
10
VDD
Q6
11
Q7
12
Q8
C149
13
Q9
14
0.1
Q10
1
15
GND
Q11
D
SW19
CA
1
2
SW16
CA
1
2
SW4
CA
1
2
SW7
CA
1
2
SW10
CA
1
2
SW13
CA
1
2
SW39
CA
1
2
SW38
CA
1
2
SW16:LOOP
SW19:HOLD
SW4:DEL
SW7:SONG
SW10:LENGTH
SW13:QUANTIZE
SW39:C
SW38:TAP TEMPO
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