Roland JC-40 Service Notes page 21

Nov. 2015
fig.d-main-1.eps@R
VR Layout
VR2 VR3 VR4 VR5 VR6 VR7
3
IC14
TC7W08FU(TE12L.F)
D+3.3V
8
VCC
C161
0.1uF
4
VSS
C34
0.1uF
12-RMN6TP
DG DG
DG
IC16
UPD800402GJ-211-UEN-A(ESC)
DG
D+3.3V
FC_RX
5
6
RESET FC_TX
IC14
TC7W08FU(TE12L.F)
D+1.5V
C130
DG
10uF
DG
121
68
69
124
125
126
127
128
LINE_MUTE
129
CPU_MUTE_P-AMP
130
PDN_CODEC
131
53
54
56
57
58
59
60
63
CTL_AUTO_OFF
43
44
45
46
D+3.3V D+3.3V
UnPop UnPop
47
D19 D13
48
1SS362FV(TPL3) 1SS362FV(TPL3)
51
2 1 2
52
K1 A2 K1
DG
64
65
66
67
120
78
22
EA6
24
21
28
23
25 4 5
29 3 6
31 2 7
33 1 8
39
40 1 8
38 2 7
32 3 6
30 4 5
2
3
4
5
6
7
8
11
D+3.3V
20
19
16
14
13
12
15
R164 2.2k
DG
D+3.3V D+3.3V
3 3
COM COM
DG
DG
R228
1k
R227
1k
C178 C179
100pF 100pF
DG
D+3.3V D+3.3V
3 3
COM COM
DG DG
R159
1k
R146
1k
C186
C187
100pF
100pF
DG
D+3.3V
DETECT_INPUT1
DETECT_INPUT0
R171 2.2k
R169 2.2k
DG
1
A2
DG
R77
R71
R75
DG
D+3.3V
10k
10k
EXB28V103JX
RA1
D+3.3V
RA2
EXB28V103JX
10k
DG
B
BRI
11
N001235
12 13
SW1
SPUP192700
21
22 23
SW1
SPUP192700
DG
D+3.3V
LOOP_SW
R225 R226
22k 22k
1
1
2
2
3
From JACK BOARD
3
4
4
5
5
6
6
7
7
CN14
B7B-PH-SM4-TB (LF)(SN)
DG
D+3.3V
R135 R140
22k 22k
D+3.3V
DETECT_PHONES
DETECT_RETURN
2.2k
2.2k
LOOP_SW
2.2k
D+3.3V
1
CN7 B2B-PH-SM4-TB (LF)(SN)
1
2
CN7 B2B-PH-SM4-TB (LF)(SN)
2
1
Q23
2SC4116SU-GR.LF(D
DG
JC-40
D+3.3V
R157
2.2k
R154 2.2k
SW_CHO3
R151 2.2k
SW_CHO2
SW_CHO1
DG
To PS BOARD
21