Circuit Diagram (Main Sheet 2/3) (Jack) - Boss Roland GT-8 Service Notes

Dec.2004

CIRCUIT DIAGRAM (MAIN SHEET 2/3) (Jack)

fig.c-main-jack.eps
C1 R1
0.01 1.2k
A
+ 1
2
DA1 N.I.U R2
10k
2 1
L1 R6 D1
- 1 2
JK1 N.I.U.(0) 10K 1SS352
2
4
GUITAR IN 1 C5
C172 0.47(ECPU1C474MA5) R7
HTJ-064-12i 10p 1M
A
A A
6
-
7
5
+
IC1B
M5238FP
A
JK2 L3 R130
HTJ-064-12D N.I.U.(0) N.I.U.(0)
2
HEADPHONES 3
1
Q1 1
C174 RN1441-A
N.I.U.
A
R131
N.I.U.(0)
A A
L4
N.I.U.(0) Q2 1
C175 RN1441-A
N.I.U.
A A
L5 R22
JK3 N.I.U.(0) 1k
C28
2
OUT L
4
1 10/16
(MONO)
HTJ-064-12i R24 Q3 1
A
100k RN1441-A
A
A
R33
JK4 1k
C40
2
4
OUT R 1 L6 10/16
N.I.U.(0) R35
HTJ-064-12i A Q4 1
100k
RN1441-A
A
A
C46
0.01 R43 1.2k
A
R45 10k
DA2
+ 1 2
N.I.U.
2 1
D3
- 1 2
L7 R49 1SS352 C180
JK5 N.I.U.(0) 10K N.I.U
C50
2
4
RETURN 1 10/16
C182 R132 R50
HTJ-064-12i A N.I.U. N.I.U. 220k
A A A
C2
N.I.U
+ 1 2
C3 10P
C196
N.I.U.
R3 R4 12K(F)
18K
C4
A
2 47/16 R5 100K(F) IC2A
-
1 2 NJM2100M
-
C170 3 1
+
N.I.U IC1A C171
3
+
M5238FP N.I.U
+ 1 2
C7 10P
C9
0.1 R8 12K(F)
-
R9 6.8K(F) IC2B
+
NJM2100M
A 6
-
IC1C 7
M5238FP C10 C173 5
+
0.1 N.I.U
R11
- 1 2
N.I.U.(0)
R13
47/2W R12
10K C17
100/16
-
IC2C
R14 NJM2100M
+
10K A
R15 C18 C19
47/2W 47/16 0.1
A A
C21 R17
0.001 10K
R18 47K
C24 10p R21 C26
R23 47K 47/16
1k 2
C29
-
1
C177
3
+
100/16 C32 IC6A N.I.U
R25 150P M5216F
13
10K
A 1
C33 R28
23
R26 0.001 10K
A A
330
VR1A
R29 47K RK09K12A0 (50kAx2)
A
C35 10p R32 C38
R34 47K 47/16
1k C41 6
-
7
C179
5
+
100/16 C43 N.I.U
R36 150P IC6B
M5216F
10K
A
R40
A
330 VR1B
RK09K12A0 (50kAx2)
A
C47
A
N.I.U.
R46 18k C48 10P
R47 12K(F)
C49 R48
2 47/16 100K(F)
-
1 2
-
3
+
C181
3
+
IC7A N.I.U IC8A
M5218AFP NJM2100M
R51
+
N.I.U.(0) C54 10P
R53 R55 12K(F)
10K
R58
-
C56 6.8k(F)
N.I.U. R57 6
+ -
10K
C184 5
+
N.I.U IC8B
C57 C58 NJM2100M
A A A
IC8C 0.1 47/16
NJM2100M
C6
N.I.U.(0)
C8
N.I.U.(0)
L2
+
N.I.U.(0)
+
R16
82K
C23 10P
R19 R20 C25
R160 C27 N.I.U.(0) 10k 47/16
1k 47/16 2
-
1
3 C176 C30
+
N.I.U N.I.U.
C200 IC5A
1/50(NP) M5218AFP
A A
R27
82K
1
Q13 C34
RN1441-A 10P
R30 R31 C36
A
R161 C39 N.I.U.(0) 10K 47/16
1k 47/16 6
-
7
C178 C42
5
+
N.I.U N.I.U.
C201 IC5B
1/50(NP) M5218AFP
A A
1
Q14
RN1441-A
A
IC9
AK4552VT
C51
1 2 11
LIN MCLK
8
SDTO
47/16 1 12
RIN BCLK
10
LRCK
15 9
C53
LOUT SDTI
16 13
ROUT PDN
47/16
+
L8
N.I.U.(0) 6
DEM0
R59
4 7
VA DEM1
10
5
VD
7
C61 C62 3 14
VSS VCOM
0.1 10/16
A D A
C63 C64
0.1 10/16
IC3
AK4552VT
2 11
LIN MCLK MCK
8
GUITAR_IN
SDTO
1 12
RIN BCLK BCK
10
LRCK LRCK
15 9
LOUT SDTI MASTER
16 13
XRESET
ROUT PDN
6
DEM0
4 7
VA DEM1
5
D
VD
C11 C12
0.1 10/16 3 14
VSS VCOM
C15 C16
10/16 0.1
A A
A
R10
10 C13 C14 C20 C199
0.1 10/16 0.1 N.I.U.
D
A D A D
C22
0.1
A D
C31
0.1
A D
+ 1
2
+
D 3. 3
+ 1
2
C37
10/16
D2
- -
1SS352
A
C195
+ +
N.I.U.
A
IC6C C44 IC5C
M5216F M5218AFP
10/16
- 1 2 - 1 2
C45
470/6.3 1
- 1 2
Q6
D
2SA1586GR
R44
470k
C52
10P
- 1 2
R52 C55
10k 0.001
MCK
RETURN
BCK
LRCK
R54 47k
SEND
XRESET
C59
10/16 R162 R60
R56 C183 6 1K 1K
-
33k N.I.U 7
D
5
+
IC7B
R62
1
C65 C66 33k C67 M5218AFP
10/16 0.1 R65 0.001
C68 47k
10p A
R66
A
10k Q15
RN1441-A
A
+ 1
2
-
+
IC7C
M5218AFP
- 1 2
GT-8
+ +
D 3. 3 D 3. 3
R37 R39
47k 47k
R38
1
MUTE
47k R41
10k Q5
2SA1586GR
R42
10K
D
C60 R61 L9
10/16 1K N.I.U.(0)
JK6
2
4
1 SEND
R63 R64
1
100K 100K
A
HTJ-064-12i
A A A
Q7
RN1441-A
33