Bryston 28-BSST Schematic
1
-33V +33V
RM?
499R
-15
CM?
100N
1N4744
DM?
A A
BP?
BP?
B B
INPUT SELECT SWITCH
JBAL?
-1
3
+1
2
1
0R0
RJ?
C C
OUT+
CF?
47p
R-IN?
40K0
RIN?
13K33
-2
SW?
+2
JS?
SE
220p
CSE?
CF?
47p
R-IN'?
40K0
RIN?
13K33
BP?
BP?
A10
RP?
499R
+15
CP?
100N
1N4744
DP?
A5
L?
RB?
RF?
15K
100K
40K0
FB
RB?
RF?
40K0
100
E1
QB?
-3
+4
E2
QB?
200
3K48
RB?
+3
RB?
R?
15K
100K
26K66
RB?
RB?
RF?
15K
100K
40K0
FB'
RB?
S1'
RF?
40K0
100
E1'
QB?
-3'
+4'
E2'
QB?
200
3K48
RB?
S2'
+3'
RB?
R?
15K
100K
26K66
RB?
BP3
D D
2
C-
U?C
29K4
R?
R?
29K4
RL?
10R
10R
RL?
100
QB?
QB?
200
8
1
10
C1
BUFF
9
R?
4
+15
10K0
CC?
220p
C4
R?
10K0
U?D
14
13
BUFF
R?
C+
11
12
-15
2uH
+33V
RB?
150R
E3
QB?
S1
200
QB?
S3
182
E5
DB?
914
914
DB?
D1
RB?
68R
CB?
RB?
A1
150R
100N
D2
RB?
DB?
S2
-33V
68R
E6
DB?
914
914
S4
172
QB?
QB?
100
E4
RB?
150R
GAIN
CP?
+33V
100N
RB?
150R
E3'
QB?
200
QB?
S3'
182
100
DB?
QB?
RB?
QB?
DB?
200
RB?
E5'
DB?
914
914
D1'
68R
CB?
RB?
150R
100N
D2'
RB?
68R
DB?
E6'
914
914
S4'
172
QB?
QB?
100
E4'
CM?
100N
150R
M3
M4
R?
C5
C2
10K0
A2
U?B
R?
475R
49R9
7
RO?
1K21
C6
R?
10K0
3
2
C7
R?
100K
-33V
RM?
90K9
A3 A5
R?
1K21
6
DIFF
C3
5
10K0
RO?
2V 1V
A2'
R?
1K21
RO?
49R9
RO?
A1'
A3'
1K21
CIN'?
-33V
100N
COUT'?
OUT-
RL?
10R
10R
RL?
L?
2uH
150KR?49K9
150KR?49K9
220pC?
U?A
COMP
+15
VR?
F2 F1
10K
F3
R?
2K21
220pCIN?
VR?
10K
RM?
90K9
-33V
220p
3
C12
R?
R?
C11
DM?
914
C8
914
DM?
D?
C9
1K0
914
R?
TL064
RP?
90K9
R?
4K75
A8
ROF?
475K
Q?
100
A6
A7
200Q?200
A9
22p
C?
15K0R?4K75
R?
RP?
90K9
F1'F2'
F3'
R?
4K75
ROF'?
R?
475K
A8'
A10'
Q?
100
R?
A6'
A5'
2K21
A7'
200Q?200
A9'
C?
A9'
22p
15K0R?4K75
R?
C15
12
8
U?D
11
10
U?C
13
9
C13
+15
14
1
5
C14
C10
U?B
6
C?
220p
15K0
R?
Q?
100
Q?
-33V
15K0
Q?
100
Q?
-33V
3
4
U?A
2
4011
7
CM?
47p C?
+33V
100N
D?
R?
A15
914
Q?
C?
220p
A10
R?
100K
18
C?
220p
CM?
100N
R?
C?
220p
200
17
47p
C?
R?
68pCFB?
100K
7K15
RF?
WB?
4K990
A11
A13
0R0
RJX?
47p
C?
100
914
D?
C?
47p
47p C?
+33V
D?
R?
914
Q?
200
C?
220p
17'
47p
C?
R?
47p
CFB'?
100K
7K15
A11'
RF?
WB?
4K990
100K
RJX'?
18'
0R0
47p
C?
100
Q?
914
D?
C?
47p
R?
D?
C16 RED
1K21
914
D?
C18 C19
914
R?
VR?
C20
499R
1K0
2K21
RMU?
A17
4K75
RF?
OUT
A12
+
CF?
2200u
Q?
CMB?
A16
47N
2K21
R?
CMA?
47N
2K21
A15'
RF?
A12'
+
CF?
2200u
A13'
RMU'?
A16'
A17'
4K75
2K21
R?
4
J?
1
LED
GRN
2
3
+33V
R?
604R
-33V
+33V
RLM?
A17'
OUT
4
5
6
7
8
9
10
11
12
13
14
15
16
R?
-33V
0R0
17
18
19
MUTE
20
J?
JA?
1
T1
RL?
T2
100R
2
P1
3
M1
4
5
6
7
8
9
10
10
11
11
12
12
13
13
14
14
15
15
16
16
17
17
18
18
19
19
20
20
CRL?
4004
10N
DRL?
J?
JA?
1
T1
1
T3
2
2
P2
3
3
M2
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
15
15
16
16
17
17
18
18
19
19
20
20
5
R?
301R
SWTH?
T
T1
1
T2
2
P1
CB?
SGND
SGND
1N914
A
M1
100N
D?
RB?
2K0
B
RB?
4K75
CD
1N914
D?
RB?
1K74
E
VRA?
QB?
2K0
F
2N5550
RB?
G
4K42
SWTH?
T
T1
T2
P1
CB?
1N914
A
M1
100N
D?
RB?
2K0
B
RB?
4K75
CD
1N914
D?
RB?
1K74
E
VRA?
QB?
2K0
F
2N5550
RB?
G
4K42
3
4
5
6
7
8
9
P2
CP?
SGND
100p
R?
QP?
1K0
2N5550
P3
R?
QBI?
JE182
CM?
CP?
QBI?
JE182
CM?
2N5550
2N5400
2N5400
1K0
PX
CP?
470p
R?
1K0
R?
1K0
CM?
MX'
470p
1K0
R?
M3
R?
1K0
QM?
SGND
100p
M2
R?
301R
M4
R?
301R
P2
SGND
100p
R?
QP?
1K0
P3
R?
1K0
PX
CP?
470p
R?
1K0
R?
1K0
CM?
MX'
470p
1K0
R?
M3
R?
1K0
QM?
SGND
100p
M2
R?
301R
M4
QP?
2N5550
2N5400
QP?
R?
1K5
R?
1K0
R?
150R
C1
QP?
2N5400
QM?
2N5550
C2
150R
R?
R?
1K0
R?
1K5
QM?
2N5550
2N5400
QM?
QP?
2N5550
2N5400
QP?
R?
1K5
R?
1K0
R?
150R
C1
QP?
2N5400
QM?
2N5550
C2
150R
R?
R?
1K0
R?
1K5
QM?
2N5550
2N5400
QM?
6
+
P5
49R9
301R
R?
R?
QDE
DB
QD?
MJE15031
220p
DC
R?
49R9
OUT
R?
49R9
DDC
220p
QDD ?
DD
MJE15030
DDE
R?
301R
R?
49R9
M5 M6
470/16
CMP?
+
P5
49R9
301R
R?
R?
QDE
DB
QD?
MJE15031
220p
DC
R?
49R9
OUT
R?
49R9
DDC
220p
QDD ?
DD
MJE15030
DDE
R?
301R
R?
49R9
M5 M6
470/16
+
CMP?
P6P4
470/16CPP?
0R3
1E
Q?
0R3
+
P6P4
470/16CPP?
R?
0R3
1E
Q?
0R3
22R1
R?
R?
0R3
2E 3E 4E
Q?
Q?
MJL21193
Q?
MJL21194
0R3
R?
R?
22R1
22R1
R?
R?
0R3
2E 3E 4E
Q?
Q?
MJL21193
Q?
MJL21194
0R3
R?
R?
22R1
7
R?
R?
R?
0R3
0R3
Q?
Q?
Q?
Q?
MJL21193
Q?
Q?
MJL21194
0R3
0R3
Q?
0R3
R?
R?
Q?
MJL21193
MJL21194
R?
R?
Q?
Q?
R?
R?
R?
MJL21194
16E 14E 15E 13E
0R3
R?
R?
0R3
8E 7E6E
Q?
12E11E10E9E
0R3
R?
0R3
12E11E10E9E
0R3
Q?
MJL21193
Q?
Q?
MJL21194
16E 14E 15E 13E
0R3
R?
R?
0R3
8E 7E6E
Q?
Q?
MJL21193
0R3
R?
R?
0R3
Q?
0R3
0R3
R?
R?
0R3
0R3
Q?
0R3
R?
0R3
Q?
MJL21194
R?
R?
Q?
MJL21193
MJL21194
R?
MJL21193
8
+90
JBB?
Q?
0R3
R?
R?
0R3
5E
Q?
Q?
0R3
R?
R?
0R3
5E
Q?
30
29
D?
28
1N4004
27
26
25
24
23
22
21
20
19
18
17
16
16
15
15
14
13
12
11
10
9
8
7
D?
6
5
4
1N4004
3
2
1
*
-90
+90
JBB?
30
29
D?
28
1N4004
27
26
25
24
23
22
21
20
19
18
17
16
16
15
15
14
13
12
11
10
9
8
7
D?
6
5
4
1N4004
3
2
1
*
-90
Size :
Drawn :
LTD
C
Rev :
0.0
8
P.O. BOX 2170, 677 NEAL DR. PETERBOROUGH, ONTARIO CANADA K9J 7Y4
PHONE (705) 742-5325 FAX (705) 742-0882 WWW.BRYSTON.CA
File : 28B OVERALL SCHEMATIC.SchDoc Sheet : 0 of 0
Date :
1
2
3
4
5
6
2006-10-27
7
1
2
3
4
5
6
7
8
9
10
A A
JA
B B
10
T1
1
T2
2
P2
3
P1
4
P3
5
SGND
6
M1
7
M2
8
M3
9
SGND
11
12
13
OUT
14
15
16
17
C C
18
19
20
D D
SWA
SWB
CB1
100N
T
T
RP4
301R
P2
SGND
RP1
1K0
5400
RM4
301R
M4
QPB
5550
QMB
B
4K99
E
VRA
1K0
G
4K99
RB1
4K99
RB2
RB3
F
5550
4K99
JE182
C
QB2
RB4
QB1
CM2
470p
P3
RP2
CP2
470p
RM3
RM2
M3
RM1
RP3
M2
1K0
PX
1K0
1K0
MX'
1K0
1K0
SGND
5550
5400
QME
QPE
P5
5400
QPC
RP7
1K5
RP6
1K0
150R
PF
CP3 220p
CM3
MF
150R
RM6
1K0
RM7
1K5
301R
RP8
RP5
P6
220p
M6
RM5
301R
RM8
QMC
5550
M5 M9
CP4
470/16
49R9
RP10
P8
QPD
MJE15035
RP9
49R9
RM9
49R9
M7
QMD
MJE15034
M8
RM10
49R9
CM4
+
470/16
P7
OUT
+
P9P4
22R1
RPP
RE1
0R3
1E
QP1
QP2 QP3
MJL21193
QM9
MJL21194
RE9
0R3
RPM
22R1
RE2
0R3
2E 3E 4E
QM10
RE10
0R3
RE3
0R3
MJL21193
QM11
MJL21194
RE11
0R3
QP4
QM12
+90
RE4
0R3
QP16
16E 14E 15E 13E
QP14 QP15
MJL21194
MJL21194
QP13
DP
1N4004
JB
1
2
3
0R3
RE16
0R3
RE14
0R3
RE15
0R3
RE13
4
5
6
7
NC
8
9
RE8
RE6
RE7
RE5
10
11
12
0R3
0R3
0R3
0R3
13
14
15
8E 7E6E
12E11E10E9E
RE12
0R3
QM8
MJL21193
QM6 QM7
MJL21193
QM5
5E
DM
1N4004
-90
J1
KFE 143-8
E E
Title :
File :
Date :
1
2
3
4
5
6
7
J2
KFE 143-8
P.O. BOX 2170, 677 NEAL DR. PETERBOROUGH, O N. CANADA K9J 7Y4
PHONE (705) 742-5325 FAX (705) 742-0882 WWW.BRYSTON.CA
J3
KFE 143-8J4KFE 143-8J5KFE 143-8
28B SST POWER BOARD
Sheet : of Rev :
Drawn :
8
9
14
LTD
10
1
A A
JXTS
RED
B B
1
2
3
4
5
6
7
8
VIO
X = JUMPER
XX
A/C OPERATIN G
C C
ICSP HEADER
Vpp
Vdd
GND
D D
ICSP Data
ICSP Clock
VOLTAGE SELECTOR
MOM SW OPT
J5
1
2
3
4
5
6
2
+
CHASSIS GND ISOLATOR
RGS
CHS
XX
100V
120V
220V
240V
Vdd
RST
POS2
POS1
C20
100R
JP1
JP2
JP3
BR2
DC FILTER
CGS
100N
RA5
RB7
RB6
3
+
C19
Vdd Vrel
C3
100/16
Vrel
BRG
R11
Vdd
49K9
R12
10K
ZCD
VS1
VS2
LAT VS1
4
Q4
LM2931AZ5
+
1000/25
R5
R5
1K5
VR1
MON
100p
CNY17-4
1KO
R6
C4
IC6
R6
1K0
TRD
GRN
RD
RST
PWR
REM
LOC
ZCD
R8
2K0
1K0
R7
D5
1N4004
ZERO CROSS DETECTOR
5
TX2A
alternate part
D1
VREL
1N4004
D2
1N4004
+
D3
C2
CU1 100n
IC1 PIC16F818
1
RA2
2
RA3
3
RA4
4
RA5
5
Vss
6
RB0/INT
7
RB1
8
RB2
RB39RB4
LRD
TO LINE VOLTAGE STATUS LED
LGR
30K 2W
5A
R2
30K 2W
5C
R3
1N4004
1N4004
D4
RU5
TRD L2
499R
18
RA1
17
RA0
16
RA7
15
RA6
14
Vdd
13
RB7
12
RB6
11
RB5
10
1P
N2
7S
9S
7S
9S
TX2
9S
7S
IC3 MOC3052
U5
Vdd
MUT
MON
LAT
TRIG
POS2
POS1
VS2
1P
2P
4P
N2
1P
2P
4P
VOLTAGE SEL EC T
REM
6
7
8
9
10
TX1 PRIMARY WIRES
240V
ORG
NC NC
YEL
BRN
WHT
GRY
NC
BLK
Q2
PN100
220V
YEL
ORG
BRN
WH
GRY
NC
BLK
JTXP1
N2
1
2
X
JA
120V
240V
120V
JTEST
RG1
22R
BTB 24800B
R1
221K
C1
F1
.22/250V
R9
475R
L3
Q3
GT2GT1
CS
0.1uF/250v
MUT
10K0
470u/10
RM
CM
3
4
240
5
Y
6
7
L2
8
L1
1
N1
2
JAC
MUTE CONTROL
DM
MM MN
1N5228
+
ACH
ACL
Vrel
9111316
DA
E1
1N4004
DB
1N4004
DC
1N4004
DD
E2
1N4004
5
4
IC5
MOC8100
TRIG
1
2
20K0
CT
22u/10v
R4
1K0
DRL
HANDOFF RELAY
DT
1N5228
E4
2
LM317LZ
E3
TT
Q5
1
T
+
EXT PWR DETECTOR
3
1N4004
Z
Q1
PN100
CA
2u2
RL2
1468
+
120V
ORG
WH
YEL
NCNCNC
GRY
BRN
BLK
MUTE
GND
GRN1
RED1
LGND
GRN1
RED1
PWR
LGR
LRD
GND
LOC
100V
YEL
GRY
ORG
NC
WH
BRN
BLK
J MLED
J PSLED
JEXT
T1
T2
T3
4
3
2
1
5
4
3
2
1
7
6
5
4
3
2
1
PWR SW
LED Green
LED Red
OUT
EXT12V
IN
LOC/REM
(local = open)
632x1/4
Size :
A
R8
10
Drawn :
9
LTD
Rev :
E E
1
2
3
H1 H2 H3
4
H4
5
H5 H6
H7
File : Sheet : of
6
Date :
7
P.O. BOX 2170, 677 NEAL DR. PETERBOROUGH, ONTARIO CANADA K9J 7Y4
PHONE (705) 742-5325 FAX (705) 742-0882 WWW.BRYSTON.CA
Title :
28B SST Micro Soft Start
8
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