Roland AT-80SL - Lcd Contrast

132
Jun. 2005
CIRCUIT DIAGRAM (MIC PHONES)
fig.mic-c
PHONES L
PHONES R
AGND
AGND
MIC IN
AGND
PHONES SW
PHONES SW
LED
MIC SW
-12V
+12V
To VCA
BOARD
Vref+5V
CONT
ref GND
To
MAIN
BOARD
LCD
CONTRAST
HEADPHONES
2-1
2
+
1
2
+
1
2-1
A D
D
D
D
L18
EXCELDR35V
L19
EXCELDR35V
JK10
YKB21-5078
1
2
3
4
5
6
7
8
9
R1
7
3
R174
6.8K
D14
1SS133
1 2
D15
1SS133
1 2
C131
ECQV@
0.15
C1
3
EC
Q
680
IC17A
UPC4570HA
+
-
3
4
2
R171
22k
R169
680
R178
68K
R175
3.3K
R176
6.8K
R177
3.3K
IC17B
UPC4570HA
+
-
7
6
8
R172
5.6k
R170
3.3K
R
6
C127
SME-VB@
47/50
C135
SME-VB@
47/50
C132
SME-VB@
47/50
C129
ECQB@
150P(K)
C133
ECQB@
220P(K)
C130
ECQB@
220P(K)
C128
ECQB@
150P(K)
VR3A
EVJ01B@
10KB
1
2
3
VR3B
EVJ01B@
10KB
10
20
C123
ECQB@
150P(K)
C124
ECQB@
150P(K)
C125
DD@
0.1
CN27
51015-1300
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
VR201B
RK09K111@
10 20
C202
DD@
0.1
R202
JP
R201
JP
R164 SR50TR@J 100
R165 SR50TR@J 100
R167 SR50TR@J 100
R166 SR50TR@J 100
R203
3.3k
R204
NIU
R205
JP
VR201A
RK09K1110 10KB
1
2
3
CN201
B3B-PH-K-S
1
1
2
2
3
3
C201
SRA-VB@
1/50
C203
SME-VB@
47/50
C204
DD@
0.1