Circuit Diagram (Main Board: Digital) - Boss GT-100 Service Notes

Mar. 2012

Circuit Diagram (Main Board: Digital)

fig.d-main-4.eps
MIDI IN/OUT
JK5
YKF51-5054V
14
R259
12
0
15
C240
R260
UnPop
0
24
R261
22
0
25
R262
0
GND
GND
AMP-CTL
Q40
DTA114TUAT106
SW-INT
30
D+3.3 D+3.3
C242
R248
1.5k
120
0.1uF
1
5
R257
3
100
D+3.3
IC21
R249 22 1/4W
QCPL-M614-500E
GND
R250 22 1/4W
10 11 12
D+3.3
IC23
TC74VHC04FT(EL.K)
2 1
GND
D14
1SS362FV(TPL3)
UnPop
C271
0.1uF
D+3.3
C241 C243
0.01uF
0.1uF
1 4
TP295
2 3
IC22
1
ASSR-1218-503E
Q28
DTC114TUAT106
GND
EXP-VR
OUTPUT-VR
VR1-COM
VR2-COM
SW-COM
ADMPX2
ADMPX1
ADMPX0
D18 DAP202U T106(PB FREE)
2 1
D+3.3
R310
10k
2
TP105
R309
2.2k
GND
R246
R263
100
C188
1000pF
GND
13
IC23
TC74VHC04FT(EL.K)
D+3.3
IC23
1 2 3 4
IC23 IC23
TC74VHC04FT(EL.K)
TC74VHC04FT(EL.K) TC74VHC04FT(EL.K)
GND
TC74VHC04FT(EL.K)
JK4
2
R253
AMP_CTL
4
0
1
HTJ-064-12IMP
R252
0
C239
UnPop
GND
R76 0
R77 0
R91 0
R129 0
R142 0
R143 0
R144 0
R145 0
TP412
TP413
LED-DATA
LED-CLK
SW-8
SW-7
SW-6
SW-5
SW-4
SW-3
SW-2
SW-1
D19 DAP202U T106(PB FREE)
2 1
D20 DAP202U T106(PB FREE)
2 1
2
MIDI-IN
D+3.3
R292
4.7k
MIDI-OUT
5 6 9 8
IC23 IC23
TC74VHC04FT(EL.K)
LED+3.3 D+3.3
CN8
R264
26
0
25
24
23
22
21
20
19
18
17
16
15
14
R149 0
13
R151 0
12
11
R168 0
10
R171 0
9
R173 0
8
R174 0
7
R175 0
6
R176 0
5
R177 0
4
R178 0
3
2
1
TP293
26FE-ST-VK-N
TP305
TP306
TP307
GND
TP308
TP309
TP310
TP311
1
D21 DAP202U T106(PB FREE)
GT-100
TO PANEL BOARD CN401