Boss GT-100 Service Notes page 27

Mar. 2012
fig.d-main-3.eps@R
A+12 A+12
Q27
1
R191 47k
Q11
1
DTC114TUAT106
GND
A-12
Gain=-16.85dB
R179 R201
1.2k 5.6k
D ( 0.5% ) D ( 0.5% )
1
Q16
R255
2SC4213-A(TE85L.F)
1.2k
GND
R180 R202
1.2k 5.6k
D ( 0.5% ) D ( 0.5% )
1
Q20
R254
2SC4213-A(TE85L.F)
SDI-CODEC0
1.2k
TP396
GND
C163
10uF
16V
R208
10k
D ( 0.5% )
C156 C193
10uF
16V
R211 D ( 0.5% )
2
27k
D ( 0.5% ) 3
R212
27k
D ( 0.5% )
SDI-CODEC1
GND
PVCC
PVCC
R230 10k
1
Q26
1 1 2SA1832-GR(TE85L.F)
R220
100k
GND
GND
Q12 Q13
DTC114TUAT106 DTC114TUAT106
IC13
NJM4580M(TE3)
R238
1M
GND
Gain=+18.31dB
f1=8.84kHz
f2=1.339kHz
R209
C164
10k
1800pF
D ( 0.5% )
C195 UnPop
R235 56k
C159
D ( 0.5% )
10uF
16V
2
1
3
IC15
NJM4580M(TE3)
GND
GND
R210
C169
10k
1800pF
D ( 0.5% )
C199 UnPop
R236 56k
C157
D ( 0.5% )
10uF
16V
6
7
5
IC15
NJM4580M(TE3)
GND Gain=+18.31dB
GND
f1=8.84kHz
f2=1.339kHz
Gain=-16.39dB
C167
1800pF
UnPop
R237
56k
1
IC16
NJM4580M(TE3)
Gain=+12.36dB
C237
470uF
16V
GND
R245
100
C238
1uF
GND
A-12
A+12
IC3
NJM4580M(TE3)
GND
A-12
D12
1SS387(TPH3.F)
Q15
2SK880-GR(TE85L.F)
1 2
R199
TP388
R154 15k 10k
R194 INPUT=-6.85dB(OUTPUT Setting: -10dB)
10k D ( 0.5% ) D ( 0.5% )
INPUT=+1.11dB(OUTPUT Setting: +4dB)
D ( 0.5% )
C200 UnPop
AUX=-0dB(OUTPUT Setting: -10dB)
AUX=+7.96dB(OUTPUT Setting: +4dB)
22k D ( 0.5% )
2
1
R206
3
C166
IC13
UnPop
TP391
NJM4580M(TE3)
TP329
GND
1SS387(TPH3.F) Q14
D11 2SK880-GR(TE85L.F)
1 2
R198
TP389
R156 15k 10k TP390
R195 D ( 0.5% ) D ( 0.5% )
INPUT=-6.85dB(OUTPUT Setting: -10dB)
10k D ( 0.5% )
C205 UnPop
INPUT=+1.11dB(OUTOUT Segging: +4dB)
AUX=-0dB(OUTPUT Segging: -10dB)
R207 22k
6
AUX=+7.96dB(OUTPUT Segging: +4dB)
7
D ( 0.5% )
5
C168
IC13
UnPop
NJM4580M(TE3)
GND
TP393 C202 UnPop TP392
R134
10k
R130 10k
D ( 0.5% )
R135 22k D ( 0.5% )
INPUT=-6.85dB
D ( 0.5% )
2
AUX=+0dB
1
3
C233
IC9
UnPop
NJM4556AM(TE3)
GND C206 UnPop
R131
10k
TP394 TP395
D ( 0.5% )
R132 10k
R136 22k D ( 0.5% )
INPUT=-6.85dB
D ( 0.5% )
6
AUX=+0dB
7
5
IC9
C234
NJM4556AM(TE3)
UnPop
GND
R214
1k
1
Q19
R192
2SC4213-A(TE85L.F)
1.2k
GND
NJM4556AM(TE3)
IC16
IC15
NJM4580M(TE3) NJM4580M(TE3)
GND
GND
6
7
5
IC16
NJM4580M(TE3)
GND
C178
10uF
16V
R215
1k
1
Q18
R251
2SC4213-A(TE85L.F)
1.2k
GND
GND
C177
10uF
16V
R213
1k
1
Q25
R239
2SC4213-A(TE85L.F)
1.2k
GND
GND
1206
R170 R169 22
22
1206
1 1
R228 R225
1.2k 1.2k
UnPop
GND GND
R157
1206
22
1206
R159 22
TP402
1 1
R218 R193
1.2k 1.2k
Q23
UnPop
UnPop
2SC4213-A(TE85L.F)
GND GND
C175
10uF
16V
SEND
GND
A+PH
C223 C160
10uF
0.1uF 35V
IC9
C224 C158
10uF
GND
0.1uF 35V
A-PH
GT-100
GND
MAIN-L
MAIN-R
A+PH D22
1SS362FV(TPL3)
2 1
A-PH
PHONES-L
R165
0
1608
Q22
2SC4213-A(TE85L.F)
A+PH D23
1SS362FV(TPL3)
2 1
A-PH
PHONES-R
R158
0
1608
Q24
2SC4213-A(TE85L.F)
27