Roland EXR-7 Service Notes

EXR-7
Apr.2004
39
38
PULSE
DBCLK=54.7kHz Duty=50%
PULSE
To DBEAM Photo Coupler Board
(CN1)
18k
XDBPLSDBCLK
DBRST
DBV
D
D
D
5VD
D
D
5VD
5VD
5VD 5VD
5VD
+12V VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC/2
VCC/2
VCC/2
VCC/2
D
D
D
D
D
D
C404
10uF16s
C405
100nFs
C400
10uF16s
C408
100uF16s
Q3
2SC1815GR
3
1
2
IC79A
74HC393
1 3
4
5
62
AQA
QB
QC
QDCLR
R256
10s
R257
10s
R258
NIU
R255
0s
R259
NIU
Q2
2SA1037KR
2
1
3
R230
18Ks
R232
10Ks
D5
DAP202K
2 1
3
D3
DAP202K
2 1
3
D7
DAN202K
21
3
D6
DAN202K
21
3
C389
100nFs
R233
100s
D4
DA204K
2 1
3
R236
33Ks
C387
100nFs
R235
15Ks
R234
100s
C386
10pFs
VR1
EVND8AA03B24
20K
13
2
C390
10nFs
R263
1
C399
100nFs
C401
100nFs
R238
22Ks
R239
47Ks
C410
33uF16s
R249
3K3s
C391
100nFs
C393
100nFs
R228
68Ks
R227
820Ks
R229
12Ks
R245
1Ms
R242
1Ks
R241
120Ks
R240
68Ks
R237
10Ks
C392
8200pF
R247
4K7s
C394
100nFs
C397
22pFs
R243
NIU
R244
100Ks
C396
47nFs
R231
2K2s
R246
120Ks
C395
47pFs
R260
10Ks
R261
100s
R248
1K5s
C409
100nFs
R262
100s
C411
150pFs
Q1
2SK368GR
3
1 2
L45
BK2125HM102
1 2
C421
33uF16s
12
CN17
53014_0710
1
2
3
4
5
6
7
1
2
3
4
5
6
7
IC78D
74HC10
147
IC78B
74HC10
3
4
5
6
IC78C
74HC10
9
10
11
8
IC78A
74HC10
1
2
13
12
R250
33Ks
C403
100nFs
C402
10uF16s
C398
10uF16s
TP
TP14
TP
1
Q4
2SC2235Y
3
1
2
C388
1uF16s
IC79C
74HC393
7 14
GND
VCC
IC79B
74HC393
13 11
10
9
812
AQA
QB
QC
QDCLR
-
IC77C
M5223FP
8 4
C422
NIU
D10
NIU
1 2
D8
EDZ7_5B
1 2
R251
10Ks
C407
100uF16s
R252
10Ks
D9
DA204K
21
3
-
IC80C
M5223FP
8 4
-
IC80B
M5223FP
6
5
7
-
IC77A
M5223FP
2
3
1
-
IC80A
M5223FP
2
3
1
-
IC77B
M5223FP
6
5
7
DBV
DBCLK
DBRST
CIRCUIT DIAGRAM (MAIN 5/7 - D-BEAM SECTION)

Roland EXR-7 Specifications

General

Brand	Roland
Model	EXR-7
Category	Electronic Keyboard
Language	English