Roland EXR-7 Service Notes

EXR-7
41
CIRCUIT DIAGRAM (MAIN 7/7 - USB SECTION)
D15 D14 D13 D12 D11 D10 D9 D8 D7 D5 D4 D6 D3 D2 D1 D0
A6 A5 A4 A2 A1 A3
A[0..21]
D
D
D
D D D
D
+
D3.3
D
5VD
5VD
5VD
D[0..15]
R172
1Ms
R170 10Ks R171 10Ks
C305 10nFs
C302 1uF16s
C301 10nFs NIU
R168 1K5s
R169 10Ks
IC39 M66291GP
1
2
3 4 5 6 7 8 9 10 11
12
13 14
15
16
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
3536
37 38 39 40 41
42
43 44 45
46 47 48
CORE-VCC
GND
D-
D+
VBUS
TRON
TEST
DACK1
DREQ1
TC1
INT1/SOF
IO-VCC
XOUT XIN
GND
CORE-VCC
A1 A2 A3 A4 A5 A6 D0 D1 D2 D3 D4 D5 D6 D7 D8/P0 D9/P1 D10/P2 D11/P3
IO-VCCGND
D12/P4 D13/P5 D14/P6 D15/A0 HWR/BYTE
INT0
RD LWR CS
RST
DREQ0
DACK0
C300 1uFs
R166 27s R167 27s
C299 NIU
R165 0s
X4
MA_406_12MHz
12.000MHz
C303 15pFs
C304 15pFs
R174 470s
C298 100nFs C297 100nFs C296 100nFs C295 100nFs
C293 10uF16s C294 10uF16s
R173 1Ks
D[0..15]
A[0..21]
XUSBCDREQ XUSBCDACK XUSBCINT
XRESET
XUSBC
XWRL
XRD
VBUS UDP UDM
To page 34, D[0..7] To page 40, D[0..7] To page 36, D[0..15] To page 32, D[0..15]
To page 34, A[0..1] To page 40, A[0..1] To page 36, A[0..21] To page 32, A[0..13]
To page 34 To page 40 To page 36 To page 32
To page 34 To page 40 To page 36 To page 32

Roland EXR-7 Specifications

General

Brand	Roland
Model	EXR-7
Category	Electronic Keyboard
Language	English