Roland A-49-BK, Service Notes

Page: 14 / 19

14
Sep. 2012 A-49-BK, A-49-WH
Circuit Diagram (Main Board)
fig.d-main.eps@L
T6
DGND
PR7
PR3
DGND
D+3.3V
T0
D+3.3V
AD_EXPR
AD_BEND
PR0
AD_MOD
SC5
T2
DGND
DGND
AD_HOLD
T3
T5
ASEL0
D+3.3V
SC6
D+3.3V
DGND
MIDI-TX
DGND
DGND
D+3.3V
PR4
PR5
SC7
VBUS+5V
T7
VBUS+5V
D+3.3V
DGND
SC4
DGND
DGND
PR2
SC0
PR6
D+3.3V
D+3.3V
D+3.3V
DGND
DGND
SC1
AD_EXPR
T4
ASEL1
SC2
PR1
D+3.3V
SC3
T1
DGND
SWS3
DGND
D+3.3V
DGND
D+3.3V
DGND
D+3.3V D+3.3V
DGND DGND
D+3.3V D+3.3V D+3.3V D+3.3V
DGND DGND DGND DGND
AD_C1
LSD1
SWD2
LSCK
SWD1
LSD0
SWS0
SWS1
SWD0
SWS3
SWS2
AD_C2
AD_MOD
AD_BEND
PR3
SC3
PR7
SC4
SC1
PR1
SC2
SC6
PR2
SC7
SC0
SC5
PR5
PR0
PR4
PR6
AD_C1
AD_C2
SWS0
SWS1
SWS2
LSD1
LSD0
ASEL2
AD_HOLD
DGND
DGND
DB_PLS
DGND
VBUS+5V
DGND
SWD0
SWD1
SWD2
LSCK
D+3.3V
AD_DB
AD_BEND
AD_MOD
AD_C2
SWS2
SWS3
SWD2
SWD0
LSD1
AD_C1
SWS1
SWS0
LSD0
SWD1
LSCK
DGND
AD_C2
AD_C1
AD_MOD
AD_BEND
DGND
DTA124EUA T-106(PB FREE)
Q1
1
32
100pF
C13
100pF
C23
1000pF
C35
0.1uF
C6
100pF
C16
1000pF
C34
100pF
C22
L5
100k
R13
L6
DTC114EUAT106(PB FREE)
Q2
1
23
1k
R15
100pF
C19
L4
IC1
AK2923H-E2
5
7
6
100pF
C18
L3
KDS122
D1
1
3
2
100pF
C20
10uF
C31
10uF
C29
L1
100pF
C27
NJM2882F33-TE1
IC4
1
VIN
3
CTRL
2
GND
4
N-BP
5
VOUT
IC1
AK2923H-E2
3
1
2
100pF
C14
AK2923H-E2
IC1
48
EXB28V101JX
RA6
1 8
6
5 4
3
2 7
1k
R16
KDS122
D2
1
3
2
LGR4609-7100F
JK2
1
3
4
2
0.1uF
C2
100pF
C15
220
R1
EXB28V101JX
RA9
1 8
6
5 4
3
2 7
100pF
C28
100pF
C25
LGR4609-7100F
JK3
1
3
4
2
100pF
C26
100pF
C21
2DJ-00600003
JK4
3 5 2 4 1 9 10
100pF
C17
L2
100k
R14
100pF
C24
6501S-26G2
CN2
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
D3 KDS160
220
R2
0.1uF
C8
0.1uF C36
0.1uF
C37
0.1uF
C38
0.1uF
C39
0.1uF
C41
0.1uF
C40
0.1uF
C42
0.1uF
C45
0.1uF
C44
0.1uF
C43
TP3
TP4
TP5
TP6
TP7
TP8
TP9
TP10
TP11
TP12
TP13
TP14
TP15
TP16
TP17
TP18
TP19
TP20
TP21
TP22
TP23
TP24
TP25
TP26
TP27
TP28
TP29
TP30
TP31
TP32
TP33
TP43
TP42
TP44
TP49
TP34
TP35
TP36
TP37
TP38
TP39
TP40
TP41
EXB28V103JX
RA1
1 8
6
5 4
3
2 7
EXB28V103JX
RA2
1 8
6
5 4
3
2 7
2 6V
TC74LVX4051FK(EL)
IC2
4
7
2
6 5
5 1
4
3
12
15
2
0
13
9
C
10
B
8
GND
16
VCC
3
COM
14
1
11
A 6
INH
7
VEE
100
R5
100
R4
100 R6
10k
R21
0 R22
EXB28V103JX
RA13
1 8
6
5 4
3
2 7
EXB28V103JX
RA12
1 8
6
5 4
3
2 7
22FMN-BTK-A (LF)(SN)
CN1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
100pF
C46
100pF
C47
100pF
C48
100pF
C49
100pF
C50
100pF
C51
100pF
C52
100pF
C53
100pF
C54
100pF
C55
100pF
C56
100pF
C57
100pF
C58
100pF
C59
1000pF
C60
1000pF
C61
1000pF
C62
1000pF
C63
1000pF
C64
1000pF
C65
1000pF
C66
1000pF
C67
1k
R12
1k
R11
To Keyboard
MSK-2
OUT
Cable Assy
EXPR.
MIDI
+
(300mA max.)
HOLD
-
To PANEL BOARD
SW
(H-Active)
SCAN [~12]
1
1