Bryston 4B SST2, 3B SST2 Cirquit Diagram
1
2
3
4
5
6
7
8
9
10
DC FILTER
A A
SST Micro Soft Start PCB R6
Vdd Vrel
IC2
+
B B
100/16
78L05
C3
C2
1000/25
D1
1N4004
D2
D3
D4
1N4004
1N4004
1N4004
+
TX3
C19
+
BR2
TX3 POWER SELECT
JA
GND
499R
RU5
RA
RA
RA
RA
Vdd
RB7
RB6
RB5
Vdd
MUT
18
MON
17
LAT
16
TRIG
15
14
POS2
13
POS1
12
VS2
11
VS1
R11
49K9
JP3
GND
C C
R12
MON
2K0
VR1
1KO
10K
CU1
100n
R5
Vdd
IC1 PIC16F818
TRD
1
RA2
GRN1
2
RA3
RED1
3
RST
RA4
4
RA5
5
Vss
PWR
6
RBO INT
REM
7
RB1
LOC
8
RB2
ZCD
910
RB3 RB4
Vdd
D D
C4
100p
1K0
R6
RST
J5
S2
LOC
(local = open)
E E
LOC/REM SW
REM
IC5
5
4
MOC8100
POS1
POS2
ICSP HEADER
RT
TRIG
20K0
R4
1K0
1
2
2
T
+
DT
1N5228
CT
22u/10v
IC4
LM317LZ
1
TT
Q1
PN100
GND
1
2
3
4
SAFETY CRITICAL PARTS
C1
C20
120v
240v
120v
ZCD
A/C OPERATING
JP2
VOLTAGE SELECTOR
100V
X = JUMPER
JP1
Vrel
3
+
CA
2u2
+
1P
MOC3052
120V
DRL
1N4004
1N4004
221K
N2
1A 250v
F2
IC3
CNY17-4
IC6
CNY17-4
IC7
XX
220V
240V
1N4004
DA
1N4004
DB
1N4004
DC
DD
.22uF/250V
R1
F1 = 120 + 100V UNITS
F1A = 220 + 240V UNITS
FUSE VALUES
100V
120V
220V
240V
BTB 24800B
22R
RG1
30K 2W
R2
1N4004
R3
D5
30K 2W
D5a
XX
RL2
1468
5
F1
F1A
3B 4B
15A
10A
12A
10A
6.3A
5A
6.3A
5A
0.1uF/250v
CS
Q3
1P
N2
30K 2W
R2a
1N4004
30K 2W
R3a
RM
MUT
499R
100K
RMA
9111316
HANDOFF RELAY
R9
GND
GND
475R
R10
6
499K
PPR
CHAS2
JAC
MRLY
LEDGND
PWR
X
100
Y
X1
Y1
J4B7B
J3B
JEXT
T1
L3
T2
T3
N
G
L
2
1
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
2
1
POWER INLET
grn/yel 5"
120V SHOWN
240V SHOWN
WR3
WR1
WR2
OUT
BLK
GRY
WHT
BRN
YEL
ORG
ORG
GRY
BRN
WHT
YEL
BLK
B1
100V-2 X 7A
220/240V-2 X 4A
120V-2 X 6A
BREAKER 2POLE
MUTE RELAY
LED GROUND
PWR SW
MUTE RELAY
LED GROUND
PWR SW
EXT12V ON
IN
7
RED
BLU
VIO
TX1
RED
BLU
VIO
TX2
4B/7B UNITS ONLY
3B UNITS ONLY
Title :
Date : Sheet : Rev :Drawn :
JAC VOLTAGE SELECT
4B-65VAC
3B-45VAC
CT
4B-65VAC
3B-45VAC
4B-65VAC
3B-45VAC
CT
4B-65VAC
3B-45VAC
TO CH1 BRIDGE
TO CH2 BRIDGE
220V
240V
YEL
ORG
NC NC
ORG
YEL
BRN
BRN
WH
WHT
GRY
GRY
NC
NC
BLK
BLK
YEL
ORG
NC NC
ORG
YEL
BRN
BRN
WH
WHT
GRY
GRY
NC
NC
BLK
BLK
4B USE (2) TF 4BSST-7 PLITRON
3B USE (2) TF 3BSST-4 PLITRON
PIN
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
120V
ORG
WH
YEL
NCNCNC
GRY
BRN
BLK
ORG
WH
YEL
NCNCNC
GRY
BRN
BLK
YEL
GRY
ORG
NC
WH
BRN
BLK
YEL
GRY
ORG
NC
WH
BRN
BLK
TX1 TX2
100V
FOR AUDIO SECTION SEE
3B SST2 CHANNEL SCHEMA TIC
4B SST2 CHANNEL SCHEMA TIC
P.O. BOX 2170, 677 NEAL DR. PETERBOROUGH, ON. CANADA K9J 7Y4
PHONE (705) 742-5325 FA X (705) 742-08 82 WWW.BRY STON.CA
3B/4Bsst2 PWR OVERVIEW SCParts
1003
8
ST
9
1
10
LTD
1
1
2
3
4
5
6
7
8
9
10
R13
100R
470p
CB1
G2
470p
CB2
100R
R12
61
7
8
9
10
R1
100R
470p
CA1
G1
CA2
470p
100R
R2
61
7
8
9
10
JS1
-V
9E
RS3
6E
POUT
R38
4K75
JE182
Q19
R37
D3
1N914
C7
470p
C8
BALANCED
INPUT CH2
SE
SW5
2
3
4
5
JS2
BALANCED
INPUT CH1
SE
SW1
2
3
4
5
G1
SST PWR525-R4 PCB
SG
1K50
1K0
R28
R16
R25
2K0
301R
R26
R36
2K0
470p
301R
R29
1K0
SG
Q14
CH2
J 2
P2
1
P1
1
2
P2
2
3
P3
3
G2
JC2
GY WIRE
GY1
RGS
CGS
100R
100N
GY2
GY WIRE
GND
J1
P1
1
P1
1
2
P2
2
3
P3
3
JC1
P5 CH2
+30B
G1
-30B
PART OF CH2
3B SST PSB R5
PCB
MUTE
GLED
RLED
J6
TO J3 LED PCB
J5
SIG 1
123
CH 2
J3
11
10
9
8
7
6
5
4
3
2
1
CH2
SST-MB-R4 PCB
J 3
11
10
9
8
7
6
5
4
3
2
1
J2
10
9
8
7
6
5
4
3
2
1
CH2
SST PWR525-R4
J 2
3B SST PSB R5 PCB
J 1
J 1
14
14
13
13
12
12
11
11
10
10
9
9
8
8
7
7
6
6
5
5
4
4
3
3
2
2
1
1
PART OF CH2
CH2
WR2
WB1
SST-OUT PCB
RED WIRE
BLK WIRE
J2
BLU WIRE
65 VAC
BLU
RED
CT
VIO
65 VAC
BP RED
BP BLK
BLK
WHT
BRN
YEL
ORG
TF 3Bsst-3
SPK +
SPK -
120V
100VGRY
0V
120V
100V
0V
TO J3 ON SOFT START PCB
PART OF 3B SST PSB R5 PCB
D6
R9
C6470u
+
R23
R31
1K5
1K0
C2
C1
Q11
5550
5400
Q17
301R
R34
R22
150R
220p
220p
R21
150R
MJE15030
R33
301R
+
C5 470u
22R1
R19
0R20
R3
4B-0R3
49R9
1E
Q2
MJL21193
Q4
*
Q1
0R20
R15
R17
0R20
Q3
MJL21193
R18
0R20
+65
1N4004
D1
L1 2uH
10R 3W
R12
R11
4R 5W
D2
1N4004
+65
J 1
J 1
14
14
13
13
12
12
11
11
10
10
9
9
8
8
7
7
6
6
5
5
4
4
3
3
2
2
-65
1
1
-65
P8
Q18
MJE15031
R5
49R9
R10
49R9
Q9
MJL21194
R6
49R9
22R1
R8
Q12
5550
R32
R24
Q16
5400
5550
Q10
1K0
1K5
5400
Title :
Date :
6
7
8
C6
100N
+
1N4754
3K9
R5
Q3
R6
68R
+RLY
CP1
100N
C7
+
CM1
R3
3K9
R2
68R
GND
P.O. BOX 2170, 677 NEAL DR. PETERBOROUGH, ONTARIO CANADA K9J 7Y4
PHONE (705) 742-5325 FAX (705) 742-0882 WWW.BRYSTON.CA
3BSST2 CHANNEL SCHEMATIC
+40v
MJE15030
DF
D5
914
R1
1K82
+
1N4737D41N4737
+30B +30A
RBP
CP2
+
10,000u
GND
+
10,000u
CM2
Q1
MJE15031
RBM
D1
+
1N4754
100R
-40
OUT
C1 100N
DB
914
1N4737
D3
Drawn : Sheet
C4
330/50
100R
C3
330/50
C5
33/35
+
Q4
R7
7815
DE
914
10N
C11
10N
C10
20K
AC1
BR1
AC2+-
20K
C9 10N
C8 10N
C2
GND
33/35
+
Q2
R4
7915
D2
DA
914
1N4737
-30A-30B
LTD
9
DG
914
+15
TF 3Bsst-3
TO J3 ON SOFT START PCB
120V
BLK
J2
ACH
ACL
DC
BLK WIRE
RED WIRE
914
100VGRY
65 VAC
RED
0V
WHT
BLU
120V
BRN
CT
100VYEL
VIO
65 VAC
0V
ORG
SST-OUT PCB
WB1
SPK -
BP BLK
WR2
SPK +
BP RED
-15
Size :
B
Rev :
10
R11
RB8
QB4
200
QB2
100
RA8
QA4
200
QA2
100
D100
1
C105
2u2
U2C
C27
100P
Q27
5550
C22 68p
R39
7K15*
M1
532R
100P
C17
2200u
+RLY
-30B
15K
100K
RB7
QB3
200
D1B
QB1
100
15K
100K
RB5
RB6
+30B
-30A
15K
100K
RA7
QA3
200
D1
QA1
100
15K
100K
RA5
RA6
+30A
G2
20K0*
R10
20K0*
C4
R9
20K0*
68uBP
SW3E
RB1
3K48
D2B
914
914
C3
68uBP
SW3D
R8
20K0*
20K0*
RF4
CB4
RF3
22p
20K0*
R7
20K0*
G1
R6
20K0*
C1
R5
20K0*
68uBP
RA1
3K48
D2
914
914
C2
R4
20K0*
68uBP
20K0*
RF2
CA4
22p
RF1
20K0*
BIAS TEST POINTS
RS4
J3
10K0
10K0
RS2
10K0
914
R108
1K0
+
R66
100K
SG
P3
P4
RB1
G1
P1
OUT1
M4
M3
RY2
RY1
Q28
5400
C28
Q20 5550
914
3K32
R58
D3
2K0
1K74
VR2
R57
914
DRL
OUT1
10K0
RS1
J2
J 2
10
P1
9
P3
8
B1
7
SG
6
B2
5
4
M3
3
M1
2
T2
1
T1
SW1
T
5
1K00
REG2
SW3A
REG1
REG ONLY
R35
Q23
200
R47
CMB1
100N
QB8
172
DB4
68R1
RB13
RB12
DB3
68R1
QB7
182
G2
CPB1
100N
CMA1
100N
G1
QA8
172
68R1
RA13
RA12
DA3
68R1
QA7
182
G1
CPA1
100N
R131
10K0
U1B
7
6
DIFF
5
R135
10K0
R136
475R
R103
49K9
U2A
+15
C2
+33V
100N
D7
15K0
SG
914
R46
R42
100K
Q25
17
100
100p
C12
C11
100p
18
100K
R43
D8
914
C19
22p
CB11
RB11
22p
150R
QB6
G2
100
DB2
914
914
CB5
RB10
150R
100N
DB1
914
914
QB5
200
RB9
CB9
150R
22p
CA11
150R
22p
RA11
QA6
100
DA4
DA2
914
914
RA10
CA5
150R
100N
914
914
DA1
QA5
200
CA9
RA9
150R
22p
CLIPPING INDICATOR
R133
U2D
47p
G1
U1A
10K0
3
COMP
2
C119
220p
100K
+15
R101
348K
150K
R100
C18
2K21
22p
R40
A15
Q22
5400
C13
C14
100N
47p
C15
R48
R52
5550
Q21
4K75
R41
+
2K21
G2
RL1
R15
100R
G1
CHANNEL 1 SHOWN - CHANNEL 2 IDENTICAL
4
RJ2
GND OPT
A A
SHIELDED CABLE
G1
SW3B
RJ1
GND OPT
SW4
G2
-30B
+30B
G2
SIG 1
+30A
G1
-30A
B B
SHIELDED CABLE
CPB
CMB
100N
100N
J 3
P3
8
+30B -30B
7
G2
6
5
4
3
2
G1
1
-30A
+30A
CMA
100N
SW3F
CPA
SW3C
100N
G1
BRIDGED (BTR)
MODE
INDIVIDUAL
23dB
GAIN CH2
29dB
SW2A
SW2B
SW2C
23dB
GAIN CH1
29dB
RO5
RO7
3K01
1K00
RO6
RO2
RO1
1K00
PRO ONLY
1K00
3K01
PRO ONLY
G2
RO4
475R
REG ONLY
VR2
1K0
PRO ONLY
VR1B
1K0
RO8
475R
G1
RO3
475R
1K0
1K00
VR1A
CH1
P5 CH1
C C
-30A
J5
G1
+30A
SIG 1
LOOP
+15
+RLY
+30B
D D
-30B
PART OF 3B SST PSB R5 PCB
-15
MUTE
GLED
RLED
J2
3BSST-LED-2
LED2
RG
E E
J3
123
TO J6 PSB
CH 2
LED1
J1
R G
TO J4B7B
SST SSB R6 PCB
FLEX
1
3B-4B SST2 INPUTS PCB
SST-MB-R4 PCB
604R
R61
1K0
VR3
Q61
2N700
J 3
J3
11
11
10
9
8
7
GRN
6
RED
5
4
3
2
1
POWER SWITCH
3B
100K
Q62
Q63
2N700
2N700
*
100K
D66
914
SG
Q60
BS107A
PSW
2
10
9
8
7
6
5
4
3
2
1
J6
123
123
J4
C105
R106
R105
2K21
1K21
-33V
A10
Q64
2N700
A5
R50
A3 A10
C10
1K21
220p
SGND
D60
1N914
R102
R103
150K
348K
SG
10
BUFF
9
220p
13
BUFF
A5
12
10K
90K9
R54
29K4
R124
29K4
R125
2K21
R49
CHANNEL MAIN PCB
U1C
8
4
+15
R132
10K0
R130
TL064
10K0
U1D
14
11
SG
-15
D61
1N914
U2B
90K9
VR1
R53
R44
4K75
R55
475K
Q26
100
Q24
200
R45
15K0
4K75
-33V
C1
100N
SGND
3
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