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2
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SAFETY CRIT ICAL PARTS
Vdd Vrel
Q4
+
LM2931AZ5
1000/25
+
C2
A A
C3
100/16
D2
D1
1N4004
1N4004
D3
1N4004
D4
1N4004
TX2
VOLTAGE SELECT
1P
JA
1
120V
2
240V
3
120V
4
BRN
C20
DC FILTER
+
+
C19
GND
ZERO CROSS DETECTOR
30K 2W
1P
ZCD
IC6
CNY17-4
IC3
B B
RU5
499R
1K5
R5
TURN ON THRESHOLD
VR1 1KO
Vrel
R6
100p
1K0
C4
MOC3052
Vdd
100n
IC1 PIC16F818
TRD
1
RA2
GRN
2
C C
R12
10K
Vdd
RA3
RD
3
RA4
RST
4
RA5
5
Vss
PWR
6
RB0/INT
REM
7
RB1
LOC
8
RB2
ZCD
910
RB3 RB4
RA1
RA0
RA7
RA6
Vdd
RB7
RB6
RB5
MICRO CONTROLER
MUT
18
MON
17
16
15
14
13
12
11
LAT
TRIG
POS2
POS1
VS2
VS1
R11
JP3
49K9
JP2
JP1
POS1
POS2
RST
1N4004
J5CU1
1
2
3
4
5
100V
R2
30K 2W
D5
R3
MOM SW OPT
A/C REF
XX
120V
220V
240V
XX
N2
JTEST
Vrel
22R
MUT
RG1
10K0
BTB 24800B
Q3
BRG
MUTE CONTROL
RM
+
F1
GND ISOLATOR
1N5228
CM
470u/10
X = JUMPER
TRIG
20K0
D D
GND
IC5
REM
MOC8100
1N5228
+
DT
CT
22u/10v
R4
1K0
2
LM317LZ
EXT PWR DETECTOR
Q1
PN100
Q5
1
DRL
HANDOFF RELAY
3
CA
2u2
RL2
1N4004
1468
DA
1N4004
DB
1N4004
+
DC
1N4004
DD
1N4004
CGS
100N
DM
111316
R1
221K
.22/250V
CS
0.1uF/250v
GND
Q2
PN100
9
C1
R9
OUT
COM
IN
RGS
100R
MUTE
JAC
L1
2
N1
1
JTXP1
1
2
3
4
5
6
7
8
475R
JXTS
8
7
6
5
4
3
2
1
JMLED
4
3
2
1
JPSLED
LGND
5
GRN1
4
RED1
3
2
PWR
1
GND
JEXT
7
6
5
4
3
2
LOC
1
SAFETY CR ITICAL PARTS
CIRCUIT BREAKER
BLK WIRE
WHT WIRE
GY WIRE
VIO
VIOLET WIRE TO PSB
BLUE
BLUE WIRE TO PSB
RED
RED WIRE TO PSB
0VAC
ORG
TX1 120V HOOKUP
CHASSIS
FLEX 3
FLEX 2
FLEX 1
0VAC
120VAC
100VAC
WHT
BRN
YEL
TORUS 2KVA
BLU
VIO
65 VAC
CT
4
3
2
1
5
4
3
2
1
7
6
5
4
3
2
1
100 VAC-15A
120 VAC-12A
220 VAC-6.3A
240 VAC-6.3A
100VAC
GRY
RED
65 VAC
POWER ENTRY
RED WIRE
JTXP1 HOOKUP
PRIMARY HOOKUP
240V
YEL
ORG
NC
YEL
BRN
WHT
GRY
NC
BLK
ORG
BRN
WH
GRY
BLK
120VAC
BLK
GY WIRE
PIN
220V
ORG
1
WH
NC
2
YEL
3
4
5
NCNCNC
GRY
6
NC
BRN
7
BLK
8
TO JLED ON PSB
28B LED PWR SW R1 PCB
LGND
GRN1
RED1
R G
GND
PWR
P1
PSW
28B EXT PWR SW R1 PCB
JEXT
S1
J1
LOC-REM SW
(local = open)
CHASSIS
120V
100V
YEL
GRY
ORG
NC
WH
BRN
BLK
1
2
3
4
OUT
EXT12V
IN
28B SST Micro Soft Start PCB
E E
FOR AUDIO SECTION SEE
28B SST2 CHANNEL SCHEMATIC
1
2
3
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Title :
Date : Sheet : Rev :Drawn :
P.O. BOX 2170, 677 NEAL DR. PETERBOROUGH, ON. CANADA K9J 7Y4
PHONE (705) 742-5325 FAX (705) 742-0882 WWW.BRYSTON.CA
28B SST2 PWR OVERVIEW SCParts
1002 ST 1
8
9
LTD
10
Page 2
1
2
3
4
5
6
7
8
RED POSTS
NON-INVERTED OUTPUT
GND
COUT
BP1
100N
10R 3W
OUT+
RL1
RL2
L2
10R 3W
2uH
BP2
A A
RB6
R-IN1
20K00*
CF4
22p
Dy
20K00*
RF3
20K00*
RF4
20K00*
QB1
Dx
914
914
QB3
3K48
RB1
RIN2
20K00*
RIN1
20K00*
+33V
RB9
15K
RB5
100
200
RB8
15K
100K
RB7
RIN3
150R
E3
100K
QB5
200
DB1
100
914
QB2
CB3
150R
RB10
100N
QB4
200
914
DB2
QB6
100
RB11
-33V
150R
GND
G+-
BAL IN PCB
B B
C C
P1
GND
+
_
123
JBAL
123
_
+
100R
100R
RIN-
RIN+
68u
C1A
CX-
SW1 INPUT
470p
CX+
470p
C1B
68u
100R
RIN
CSE
JSE
470p
10
987
61
234
5
2BBSST IN OUT R7 PCB
CPB
100N
QB7
914
RB13
914
QB8
GND
182
E5
DB3
RB12
DB4
172
CMB
100N
23dB GAIN 29dB
RM1
-33V
90K9
68R
RO2
1K54
68R
1K0
VR3A
RO1
221R
R3A
475R
SW2
RL3
100R
+33V
CP1
MUTE
RLM
MUTE RELAY
68p
Q6
5550
CM1
GND
68p
Q12
5400
OUT1
A10
DRL
CRL
914
10N
A5
VR1
10K
90K9
ROF
475K
R20
4K99
CIN
220p
GND
R03
1K21
SECTION A
RP1
R7
R24
CPA
C910p
+33V
100N
15K0
GND
4K75
R12
Q7
Q8
100
100
A10
Q9
Q10
200
200
100K
18
R21
C15
220p
GND
15K0
4K75
R13
-33V
17
100K
1K00*
A11 A12
WB1
LOOP
CMA
100N
R8
RF2
D7
914
220p
C14
CFB 68p
RF1
7K15*
2200u
+
CF2
D8
914
C10
10p
2K21
R6
RMU
A15
4K75
Q5
5400
C11
47p
GND
GND
C11A
47p
Q11
5550
R25
47N
CMM
2K21
GND
R03'
1K21
GND
RB6'
RF6
15K
100K
20K00*
CF4'22p
FB'
RB5'
QB5'
S1'
RF5
20K00*
100
100
R-IN2
20K00*
Dx'
Dy'
914
914
RB1'
RIN1'
20K00*
RIN2'
RIN3'
20K00*
GND
BLUE POSTS
INVERTED OUTPUT
BP4
D D
BP3
3K48
33'
QB1'
QB3'
20K00*
200
15K
100K
RB7'
GND
COUT' 100N
OUT-
QB2'
QB4'
200
RB8'
RB11'
10R 3W
RL1'
RL2'
10R 3W
L2'
2uH
CPB'
+33V
100N
RB9'
150R
GND
E3'
200
QB7'
S3'
DB1'
DB2'
182
E5'
DB3'
914
914
68R
RB12'
CB3'
150R
RB10'
100N
RB13'
DB4'
914
914
QB8'
QB6'
100
GND
CMB'
100N
150R
221R
VR3B
68R
1K0
R3B
475R
172
GND
-33V
VR1'
F1'F2'
10K
90K9
90K9
CPA'
R12'
RP1'
R7'
90K9
RM1'
RO1'
RO2'
1K54
ROF'
-33V
475K
R20'
Q8'
4K99
100
CIN'
220p
Q9'
GND
200
4K75
R24'
+33V
100N
D7'
15K0
4K75
SGND
A15'
914
C14'
17'
220p
Q7'
100
R8'
CFB'
100K
7K15*
RF2'
R21'
100K
18'
C15'
220p
GND
-33V
SECTION B
RF1'
CF2' 2200u
1K00*
WB2
LOOP
914
C10'
D8'
CMA'
100N
Q10'
200
A9'
15K0
R13'
CMM'
47N
C9'10p
R6'
2K21
Q5'
5400
5550
Q6'
P1'
C11'
68p
47p
68p
SGND
CP1'
GND
GND
RMU'
+
4K75
SGND
Q11'
5550
2K21
10p
R25'
CM1'
68p
Q12'
M1'
5400
C11A'47p
GND
A16'
2BBSST POWER BOARD R4
SWA
J2
JA
1
T1
T1
2
T2
T2
3
P2
P2
4
P1
P1
5
P3
P3
6
CB1
GNDGND
100N
7
M1
M1
8
M2
M2
9
M3
M3
10
GND
11
12
13
14
OUT
15
16
17
18
19
20
R32
U1C
29K4
10
8
BUFF
9
4
+15
R33
10K0
CC1
220p
R34
10K0
U1D
13
R31
29K4
T1
X3
P2'
P1'
P3'
M1'
M2'
M3'
OUT1'
14
BUFF
12
11
-15
J2'
JA
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
SECTION A
T
4K99
RB1
B
JE182
4K99
RB2
C
4K99
RB3
E
VRA
1K0
F
RB4
G
4K99
CLIPPING INDICATOR
R36
10K0
U1B
6
DIFF
5
TL064
R35
10K0
GND
R45
X3
150K
R44
MUTE
150K
QPE
5550
5400
QPC
RP7
GND
RP1
P3
RP2
QB1
CP2
470p
RP3
RM3
CM2
470p
RM2
M3
QB2
RM1
5550
GND
M2
C30 220p
R37
7
10K0
3
COMP
2
R39
100K
475R
R46
49K9
8
9
R47
49K9
914
DM7
914
DM8
2BBSST POWER BOARD R4
SECTION B
1K5
RP6
1K0
1K0
1K0
PX
1K0
1K0
MX'
1K0
1K0
RP5
5400
150R
QPB
PF
CP3 220 p
RP4
301R
RM4
301R
5550
220p
CM3
QMB
150R
RM5
RM6
1K0
RM7
1K5
QMC
5400
M4
5550
QME
U1A
D40
1
M5 M9
R40
1K0
914
R38
12
10
U2D
U2C
5
U2B
6
11
13
14
4011
1
U2A
3
4
2
7
CP4
100N
GND
301R
RP8
301R
RM8
C31
+15
CP4
49R9
RP10
QPD
MJE15035
RP9
49R9
RM9
49R9
MJE15034
RM10
49R9
+
CM4
470/16
-15
220p
GND
+15
914
D42
D41
914
R41
499R
GREEN LED BRIGHTNESS
470/16
QMD
OUT
DM2
1N4744
CM2
750R 2w
1K21
R43
R42
604R
VR2
1K0
+
-33V
1K0 2w
RM6
1N4744
+33V
P9
22R1
RPP
RE1
RE2
RE3
0R3
0R3
QP1
QP2
MJL21193
QM9
QM10
MJL21194
RE9
RE10
0R3
0R3
RPM
22R1
2BBSST PSB R5
GND
J3
J3
MUT
20
MUTE
19
18
CM
17
16
15
100N
14
13
100N
12
11
10
CP2
9
100N
8
DP2
7
100N
6
5
RP2
4
CP
3
GRN
GRN
2
RED
RED
1
RE4
0R3
0R3
QP3
QP4
MJL21193
QM11
QM12
MJL21194
RE11
RE12
0R3
0R3
+90A
CM8
-90A
-33
+
CR9
CR3
100/50
DM7
4004
100N
100/50
CR8
DP7
CR10
4004
100N
+
QP2
+33 +62
DP5
+90B
CP1+CP2+CP3+CP4
CM1+CM2+CM3
-90B
QP16
QP14 QP15
MJL21194
16E 14E 15E 13E
RE16
RE14
0R3
0R3
RE8
RE6
0R3
0R3
QM8
QM6 QM7
MJL21193
10,000u 100v
CP5
CP6
CP7
CP8
DM5
MJE15031
QM2
MJE15030
+
+
4004
RM2
DM6
1N4751
DP6
1N4751
4004
+
+
+
+
CM5
CM6
CM7
DM3
4004
10R
RRM1
MJE15031
-62
QM1
2K80
DM4
CR2
CR4
1N4759
100N
100N
DP4
CR7
CR6
1N4759
100N
100N
RP2
QP1
2K80
MJE15030
RRP1
DP3
4004
10R
+
+
CM4
10,000u 100v
MJL21194
RE15
0R3
RE7
0R3
MJL21193
RB4
+
20K
+
20K
RB3
RRM
DM1
4004
10R
4004
RM1
DM2
3K83
CR1
GND
100N
CR5
100N
RP1
DP2
3K83
RRP
DP1
10R
4004
RB1
20K
+
20K
RB2
+90A
QP13
DP
1N4004
JB
JB1
1
1
RE13
0R3
RE5
0R3
QM5
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
15
15
DM
1N4004
-90A
CA1
CA2
10N
CA3 10N
CA4 10N
10N
AC1
BRA
AC2+-
-90B
WIRES TO JXTS ON M SSB R8
RED WIRE
TXH
BLU WIRE
TXCT
VIO WIRE
TXL
+90A
4004
CB110N
10N
CB2
AC1
BRB
AC2+-
GND
10N
10N
CB4
CB3
JB
JB2
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
15
15
JLED
FLEX TO JMLED ON SSB
MUT
GRN
RED
P.O. BOX 2170, 677 NEAL DR. PETERBOROUGH, ONTARIO CANADA K9J 7Y4
PHONE (705) 742-5325 FAX (705) 742-0882 WWW.BRYSTON.CA
1
28BSST2 CHANNEL SCHEMATIC
LTD
File : Sheet : of
Date :
1003
2
ST
3
4
5
6
C
Size :
1
Rev :Drawn :
28BSST2 CHANNEL SCHEMATIC
7
8
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