Bryston 3b schematic
SST-4B78-PSB
SST 2XLR + SST 2SWITCH PCB'S
11
S T
R
1
2310
4
CH 1
J3
C3
470u
CH 1
C1
220p
RCA JK
J4 1
1
R6
2
S
T
1
2R1
3
4
CH 2
J3
C5
470u
C6
RCA JK
J5 1
2
Rev 1B change C26, C8 to 10N and R44 to 30K1 on SSB
20K0
20K0
J1
R1A
20K
20K
R2 R2A
1V
R3
20K
R4
20K
20K
B
2V
R5
1V
C
2V
220p
C2
2 J4
49K9
R12
20K0
20K0J1
R12A
J1
20K
20K
R14A
R14
1V
R13
20K
R15
20K
20K
220p
B
2V
R16
1V
C
2V
220p
C7
2 J5
49K9
R17
Rev 1c change D3 + D5 ON PSB TO 1N4737.
REV 1A JULY 9, 02
ADD R60A 4K99 TO MAIN BOARD
R1
J1
1V
S2
CH1 GAIN
2V
B
A
U
S1
BAL/UNBAL
B
B 8 J1
U
1MEG
R24
S4
CH2 GAIN
I
B
S5
I
A
B
BAL/SE
B
I
B
U
B
1K0
R22
INPUT AMPS AND MODE SELECT AND GAIN
3B-SST SCHEMATIC
TRANSISTORS
CASE
CASE
221A-02
B
340G-02
T0-3PBL
MJL21193
MJL21194
B EC
BS107A
TFET
D
1
S
3
3
BS107A
D
G S
2
G
1
2N7000
1
2 3
EC
CASE
TO-126
WG2
WG1
100N
CG
RG
100R
BR1
77-04
MJE182
MJE172
CE B
SST-MB
+30B 9
J3
.1u
C2
90K9
R10
1K0
R21
1K0
PRO ONLY
4
1
3
2
2
1
S3
INDIVIDUAL
BRIDGE
I
E
B
J3
4
I
A
B
2
3J3
I
F
B
J6
J5
5
4
6
7
8
J6
1
+30 A
1
COM
3
-30 A2
2
3
4
-30 B102
RLY+
GND 4
+15 11
-15 1
20K
A
R7
R8
20K
47P
C4
C6
-30
9 J1
DOA68
.1u
C7
+30
.1u
R9
20K0
20K0
R9A
1V
2V
B
1MEG
3 J1
4 J1
47P
C8
DOA68
+30
-30
D
C
R20
R19A
7B ONLY
.1u
C7
.1u
C6
REG
ONLY
J1
1K
VR1
R12
475R
6J3
PRO ONLY
R18
20KA
20K
20K
R19
J3 1
1K
VR2
475R
R23
SIG
TO CH2
-30 A
PSB
COM
+30 A
A
VR1
10K
OFFSET
-30 B
5
R50
1MEG
6
J3
29K4
J3
J3
J3
J3
1M0
B
R126
1M0
R127
B
J3
R54
2K21J3
R49
B
R124
13
12
R53 R44
R55
90K9
C18
220p
R125
29K4
A
.1u
C1
2
3
4K75
475K
Q26
PN
100A
R47
2200u
C17
Q24
200A
4K7
U1
U1 - TL064B
U1
PN
100A
15K
15K
R46
R48
499R
PNPN
200A
R45
-30V
R132
14
10K
R130
1
10K
R129
2K21
22P
R40
C18
D7
Q22
2N
5400
47p
2N
5550
2K21
1u5 C101
11
1u5
4K75
VR2
MUTE RLY
R136
7
C103
A
100p
C27
2N
5550
Q27
R52
68P
C22
7K15
R39
D3
1K74
R57
BIAS
Q20
2N
5550
2K
TRIM
3K32
R58
Q28
2N
5400
100p
C28
G5V-2-H1-48V
+
5760
RL1
D10
R135
100K
750R
+15
4
A
9
U1
10
1K0
R133
220p
100K
R134
A
100P
C12
100K
R42
Q25
C13
A
100N
Q23
C14
47p
C11
C15
100P
A
100K
R43
Q21
D8
C19
R41
22P
R131
10K
6
U1
5
-15
10K
A
10 J2
J2
69J2
MJE
182
Q19
5 J2
R15
RXE010
8
7 J2
4 J2
21J2
R108D100
J28
J23
J2
1K0
+
2u2
C105
100K
R66
A
100R 3W
F1
A
C119
CASE
T092
TFET
PN100A
2N7000
S G
D BE C
1 2S3 2 31
PN200A
2N5550
2N5400
B CE
21 3
D
2
G
SST-PWR 5.25"
470/16
R9
Q17
2N
5400
1K5
D3
R37
4K75
R38
R28
1K0
470p
C7
C8
470p
1K0
R29
A
SW1
67F080
T
11
Q11
2N
5550
15V
U2-4011
14
6
3
1
2
5
13
12
22R
C6
499R
R34
Q12
2N
5550
2K0
R25
R26
2K0
2N
5400
499R
C5
470/16
4
1N914
7
A
D61
1K0
R24
1K5
R32
Q16
Q14
1K5
R31
R33
R8
22R
TEMP
150K
CLIP
34K8
R101
A
220p
C2
Q18
150R
R22
2N
5400
R16
499R
499R
R36
Q10
2N
5550
R21
150R
C1
1K0
220p
R23
TP2
150K
R102
R100
MUTE
R105 R106
1N914
1K21
34K8
D60
R103
Q64
2N7000
0R20 5W
49R9
R3
R19
MJL
Q2
21193
MJE
15031
49R9
R5
49R9
R10
Q9
MJE
15030
49R9
R6
15V
2K21
2N7000
MJL
R 1-3
21194
Q1
R11
4R7 5W
10R 3W
R12
L1
2uH
TP1
Q3
Q4
MJL
21194
0R20 5W
R18
604R
R104
VR3
1K
Q63
Q62
J1
C 11-14
1N4004
0R20 5W
D1
R15
R 1-3
J1
C 6-9
0R20 5W
1N4004
R16
D2
MJL
21193
R 1-3
J1
C 1-4
BS107A
Q60
499K
1N914
R60A
LED
BRT
ADJ
Q61
2N7000
D66
499K
A
R60
J3
MUTE3
GRN
8
RED7
Page 1 of 2
MJE
15031
R2 R3
68R 2w
-65
J1
CP 1+2
10,000u/80v
J1
J1
J3
3
MUTE
8
GRN
7
RED
SST-4B78-PSB
-30 B
-30 A
-15
33u/25
+
1N4740
Q2
D2
C2
7915
A
100R 2w
-40v
R4
1N4737
D3
Q1
R1 R6
D1
3K9 2w
1u5
330u
50v 50v
50v
1N4754
+
C3+C1
F1
TR250-120
+65
+
+
CM 1+2
10,000u/80v
-65
GCS
RLY+
3K9 2w
C7
100N
15030
D24
1N4004
4K75
4
5
1N4688
VR1
10K
8K25
R27
R25
100V
230V
120V
OPT A
3 2
FT2984
7
120V
230V
RXE010
470u
C9
C11
470u
TEST
2
D14
1N4004
22u C12
D16
R24
18K2
TURN ON
THRESHOLD
Q7
PN100A
15K0
R26
4K99
R22
D15
1N4004
10R
CNY17-3
451
U9
IL4108
6
4
U4
CNY17-3
2 5
U8
COM
MUTEJ3PSW
342
R47
C27
1N4758
100u
63V
+
D17 R47
1
TX1
8
OPT B
100V
F2
1N4004
D11
3
S1
+
2
1
LM
2931A
Q5
P1N 14
U6 + U7
+
TP
+
Q6
R28
267R
R43
2
1
2
41
EXT PWR UP
RELAY
PSW
1K0
R55
10K
C26
10N
10
12
30K1
2N7000
1
SOFT START
TURN ON
6 11
4
48V RLY
1
+
7680
R56
10K
POWER
SWITCH
TOGGLE
98
U7=4011
C1314
.1u
R23
2M21
13
C8
10N
11
R44
Q4
RL2
98
13
16
D7
R35
49K9
R39
200R
2u2
+
R38
200R
2u2
100K
R40
1
EXTERNAL
TRIGGER OUTPUT
2
F1
4
EXTERNAL
TRIGGER INPUT
3
4-12V AC/DC
1MA
D18-21
PN100
100R
R34
Q9
C15
R32
1u5
C17
+
R31
10K
C16
Q8
PN100
MOC8100
5
1
4
U5
2
3
S2
2
1
1MEG
R36
1312
D24
1N4004
11
R41
604R
D23
1N4004
5
14
C14
.1u
4
R30
18K2
8 9
1
10
R37
1MEG
C23+6
2u2
475R
18K2
R33
C22
.47u
MUTE
2N7000
Q3
LEDS
1
J4
GRN
3
CH2
RED
2
MUTE
1
J3
J1
PSW
1
2
3
4
3
2
1
GRN
CH1
3BSST LED
1
COM
2
PSW
COM
MUTE
J2
MUTE
GRN
RED
1
2
MEMSW12
SST-MEMSW
+30 B
+30 A
1N4737
MJE
R5
68R 2w
F2
C6
C11
D15
KBPC352
C10
10N
3
MUTE
2J6GRN
D4D5
1N4740
3K9 2w
WB1
WR1
+40v
33u/25
C5
A
R7
D6
1u5Q3330u
35v
1N4754
C6 C4
10N
C8
10N
C9
TO SPEAKER
+15
POWER INLET
C21
PR2
NO
RL1B
267K
C2
50N
U1
TDA
1085C
1
R17A
33R2
100V
OPT 'C'
NONC
RL1A
D13
R52
N
+
R13
R14
D5
C3R4
D2
1N4004
1415 13 11 910
32 4+65 87
R2
200K
D1
1N4004
G5V-H1-24V
1N4004
IL4108
124
R51
15K15K
SOFT START + LED
CHASSIS
WG1
CH2
WG2
WG3
2 X 33,000u/6.3V
BR1
+
+
Q4
7815
100R 2w
C20
WR3
14Ga
+
+
J6
7
8
5
6
1
2
GND
OUT
BLK WR1
BREAKER
MA2
100V-6A
120V-5A
230V-3A
14Ga
BLK
120V POWER
TX WIRING
RED
BLUE
GREY
230V POWER
TX WIRING
RED
RED
BLUE
BLUE
GREY
GREY
100V POWER
TX WIRING
RED
BLUE
GREY
30K
30K
AC HIGH
PR3
NC
WR2
WR4
301K
R3
10N
CH1
J2
CH2
AC HIGH
J2
AC LOW
J2
16
15
14
13
12
11
10
9
AC LOW
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
BLK
ORG
GRY
BRN
WHT
VIO
BLK
ORG
GRY
BRN
WHT
VIO
BLK
ORG
GRY
BRN
WHT
VIO
16
200K
R1
R17
49R9
230V
120V
1N4004
D22
1N4004
3B SST SCHEMATIC
3B-SST-SCH 1B
AUG 26, 02
Rev 1B change C26, C8 to 10N and R44 to 30K1 on SSB
Rev 1c change D3 + D5 ON PSB TO 1N4737.
P1
G
221K
220N C19
22R3R33R
R15
12
267R
R18
U3
D18
1
IL4108
4 6
1 2
475K
C6
++
C7
1N4741
D8
RL1
D6
6
1N4752
L
25VAC
Q10
WHT
WW1
MAC 2213A10FP
R42
499K
PR1
C18R19
.1u
475R
GS3
PR42W D9
1N4004
510R
PR52W D10
1N4004
1K0
U2
1K0
R9
475R
R7R6
C1
+
C28
20u50
1N4740
100u/35V
100u/35V
150R
R21
2K21
PN100A
Q1
12K1
R11
1N4004
D3
D4
47u
35v
49K9
R8
C5
2u2
R5
C10
100u/35V
1K0
+
+
18K2
100K
R16
18K2
R12
Q2
PN100A
1N4004
D12
R48
CNY17-3
1 5
2 4
U10
1B
1 RED
Page 2 of 2
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