Bryston BHA-1 User Manual

BHA-1 OVERALL SCHEMATIC
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
E E
D D
C C
B B
A A
LTD
P
.O. BOX 2170, 677 NEAL DR. PETERBOROUGH, ON. CANADA K9J 7Y4
PHONE (705) 742-5325 FAX (705) 742-0882 WWW.BRYSTON.CA
Date :
File : Sheet : of Rev :
Drawn :
Title :
BHP1 - HEADPHONES AMPLIFIER
7J4
5CF
100p
5RF
1K0
5RB
1K0
R10L
2K0
MAR 2012
ST
1
2SG
5J2
VRB
100K
5J1
R9L
100R
R6L
49R9
R5L
4K99
R3L
49R9
R7L
4K99
C4L47p
5J3
R2L
4K99
2SIN
7J3
BAL OUT
VOL
VRA
100K
G
QF1
+
CF3
22u
2ZM
5.1V
R1
100R
+33A
-33A
6RL
100K
+
CA
+
CD
+
C15
2200u
+
CR2
22u
+
CR1
22u
G
CHAS
+12V
L-
R+
R-
L+
RL3C
RL1B
RL1A
RL1C
RL2C
R4L
4K99
R8L
4K99
G
5J4
5J5
R9R
100R
R2R
4K99
RL2B
RL2A
5RA
1K0
G
CR3
100N
CR4
100N
5
BHA1 OVERALL
7J1
OUT L
G8
7J2
OUT R
1R2
34K8
1R1 2K61
1R5
150R
1R7
150R
1R8
68R1
1R9
68R1
1R3 2K61
1R4 34K8
1R6
150R
1C1 47p
1C5
47p
1C4
6.8p
1C3 100N
1C2
6.8p
1Q1
100
1Q6
100
1Q2
100
1Q5
200
1Q3
200
1Q4
200
1Q8
200
1Q7
100
1D2
1D3
1D1
1C8
100N
+
1C9 47u
+
1C7 47u
1R11 100R
1R10
100R
1C6 100N
R5R
4K99
R7R
4K99
C3R47p
C4R
47p
RL3B
R4R
4K99
R8R
4K99
RL3A
G
2R2 34K8
2R1 2K61
2R5
150R
2R8
68R1
2R9 68R1
2R3 2K61
2R4
34K8
2R6
150R
2C1 47p2C5 47p
2C4
6.8p
2C3100N
2C2
6.8p
2Q1
100
2Q6
100
2Q2
100
2Q5
200
2Q3
200
2Q4
200
2Q8
200
2Q7
100
2D22D3
2D1
2C8 100N
+
2C9
47u
2R11 100R
2R10
100R
2C6
100N
C3L47p
3Q1
100
3Q2
100
3Q6
100
3Q5
200
3Q4
200
3Q3
200
3R10
1K0
3R9
150R
3R3
2K61
3R4
34K8
3R12 5R11
3R13 5R11
3D2
3C3 100N
3R1 2K61
3R2
34K8
3R8
150R
3C1 47p
3D1
3R19
100R
3R18
100R
3C5
47p
3C4
6.8p
3C2 6.8p
3Q9
MJD243
3Q10
MJD253
3C8
100N
3C6100N
+
3C7 47u
+
3C9
47u
G
G
3RA
1K0
5Q1
100
5Q2
100
5Q6
100
5Q5
200
5Q4
200
5Q3
200
5R10
1K0
5R9
150R
5R3
2K61
5R4 34K8
5R12 5R11
5R13 5R11
5C3 100N
5R1
2K61
5R2
34K8
5R8
150R
5C1
47p
5D1
5R19
100R
5R18
100R
5C5
47p
5C4
6.8p
5C2
6.8p
5Q9
MJD243
5Q10
MJD253
5C8
100N
5C6 100N
+
5C9
47u
G
6CF 100p
6RF
1K0
R10R
2K0
6RA
1K0
4Q1
100
4Q2
100
4Q6
100
4Q5
200
4Q4
200
4Q3
200
4R9
150R
4R3
2K61
4R4 34K8
4R12 5R11
4R13 5R11
4D2
4C3100N
4R1 2K61
4R2 34K8
4R8
150R
4C1 47p
4D1
4R19
100R
4R18
100R
4C5
47p
4C4
6.8p
4C2
6.8p
4Q9
MJD243
4Q10
MJD253
4C8
100N
4C6100N
G
G
4RA 1K0
6Q1
100
6Q2
100
6Q6
100
6Q5
200
6Q4
200
6Q3
200
6R9
150R
6R3
2K61
6R4
34K8
6R12 5R11
6R13 5R11
6D2
6C3 100N
6R1
2K61
6R2
3K48
6R8
150R
6C1
47p
6D1
6R19
100R
6R18
100R
6C5 47p
6C4
6.8p
6C2
6.8p
6Q9
MJD243
6Q10
MJD253
6C8
100N
6C6 100N
+
6C7 47u
G
G
B1
B2
B3B4
B5
B6
B7
B8
B9
B10
B11 B12
B13
-20B
+20B
+
5C7 47u
+
2C7
47u
+
4C7 47u
+
6C9 47u
+
4C9 47u
+20D +20F
+20C
+20E
-20D -20F
-20E
-20C
-20A
+20A
4RM
10K0
5CM
470p
3OUT
4OUT 6OUT
5OUT
R3R
49R9
R6R
49R9
J8T
J8R
J8S
2R7
150R
3_A
2_A
H1
1560-OB
H2
1560-OB
H3
1560- OB
FU1
FIDUCIAL
H5
1560- OB
H6
1560-OB
H7
1560-OB
H8
1560-OB
H9
1560-OD
3R17 10R0
3RH
20K0
6RB
1K0
4RF
4K75
4RH
20K0
2_B
3_B
H11
1560-OD
H12
1560- OD
LEFT
VRBB
BAL
R1L
4K99
C1L
270p
C1R 270p
R1R
4K99
R2
100K
3CF
100p
3CH 47p
4CF
100p
4CH 47p
D2
S1G
D1
S1G
D3
S1G
RIGHT
VRBA
BAL
7R7
5R11
7R8
5R11
7R6
5R11
7R5
5R11
7R4
5R11
7R3
5R11
7R1
5R11
7R2
5R11
4R14 5R11
4Q11
MJD243
4R15 5R11
4Q12
MJD253
3R14 5R11
3R15 5R11
3Q11
MJD243
3Q12
MJD253
6R14 5R11
6R15 5R11
6Q11
MJD243
6Q12
MJD253
5R14 5R11
5R15 5R11
5Q11
MJD243
5Q12
MJD253
1
2
3
4
5
6
7
8
9
5J6
4
1
2
3
1
2
3
12
3
G
5R21
10R0
ac ac
+ -
BR3
RG
100R
chassis
PG
GNYL WIRE
12V EXT PWR UP
5J7
8J3
BAL OUT
L-A
R+A
R-A
L+A
8J1
OUT L
8J2
OUT R
8R7A
5R11
8R8A
5R11
8R6A
5R11
8R5A
5R11
8R4A
5R11
8R3A
5R11
8R1A
5R11
8R2A
5R11
4
1
2
3
1
2
3
12
3
JFSG
RL7B
RL7A
RL7C
D7
S1G
D8
S1G
FU2
FIDUCIAL
FU3
FIDUCIAL
JFS4
JFS3
PCB
PCB1
BHA1 AC IN R5
PCB
PCB5
BHA1 MB R5
PCB
PCB7
BHA1 FEMALE R5
PCB
PCB8
BHA1 MALE R5
GND ISO
OPAMPS SUPPLIES
RELAYS SUPPLY
PWRUP MUTE
5P6
GL
1
2
3
4
5
6
7
8
9
8P1
ON LED
RB
6P3
6P1
PCB
PCB6
BHA1 AC PSW R5
D9
S1G
4D3
4Q7
100
4Q8
200
4R11
499R
6Q7
100
6Q8
200
6D3
6R11
499R
5Q7
100
5Q8
200
5D2
5R11
499R
3D3
3Q8
200
3R11
499R
3Q7
100
CONNECTOR OPTION
5R6
10K0
6R7 10K0
6C14
100p
6R6
10K0
6C13
100p
6CE 100p
G
6R17
10R0
6CA
270p
4R7 10K0
4C14
100p
4R6
10K0
4C13
100p
4CE 100p
G
4R17
10R0
4CA
270p
5D3
5R7 10K0
5C13
100p
5C14
100p
G
5CE
100p
G
3CE
100p
3R6
10K0
3R7 10K0
3C13
100p
3C14
100p
G
G
3RF
4K75
3CA
270p
3C11
100N
G
3C10
100N
G
4C11
100N
G
4C10
100N
G
5C11
100N
G
5C10
100N
G
6C11
100N
G
6C10
100N
G
5R17
10R0
5CA
270p
G8
6P2
A/C VERSION USE PCB1,2 AND 6 ONLY
5
1
3
2
6
4
9J MPS2
RLP2B
Q2
Q1
RA2
4K99
3IC1
LDA210S
RA4
4K99
RA1
1K0
RA3
1K0
3RE
1K0
12V
3P1
ON
1
3
5
MPS2 VERSION USE PCB 3 + 4 ONLY
PCB
PCB3
BHA1 - MPS2 R5
RLP1A
PCB
PCB4
BHA1 MPS2 PS R5
RLP2C
RLP2A
RLP1B
RLP1C
ON LED
RB
+
+
4C15
4700u
+
+
6C15
4700u
+
+
5C15
4700u
+
+
3C15
4700u
12V4
ON4
WIRES
G8A
FU4
FIDUCIAL
G6
GLD
ON5
G
1
2
3
4
5
6
7
1
2
3
4
5
6
7
FJ1
254PW07E
INPUT BUFFERS
POWER OP AMPS
POWER OP AMPS
SW PWRA
SW PWRB
6
7
M
M2
B
EXT
REA
REB REC
QR1 MJE15031
QR2 MJE15030
DR2
DR1
+VB
-VB
+VA
-VA
+VA
-VA
+VA
-VA
+VA
-VA
+VB
-VB
+VB
-VB
+VB
-VB
6R10
1K0
4R10
1K0
RR1
1K5
RR2 1K5
+
CG
+
CK
+
CR10
22u
+
CR9
22u
CR12
100N
CR11
100N
QR3 MJE15031
QR4
MJE15030
DR4
DR3
RR3
1K5
RR4 1K5
-33A
+33A
+
CB
2200u
+
CE
2200u
+
CC
+
CF
+
CH
2200u
+
CL
2200u
+
CJ
+
CM
G8A
1
2
3
4
5
6
7
8
9
7P1
SW PRA
SW PRB
RCA
MINI
BAL
20dB
14dB
GAIN
INPUTS
LOGO
G
5R20
10R0
G
3CM 470p
3R21 10R0 3R20 10R0
G
3RM
10K0
G
G
5RM
10K0
4CM 470p
4R21 10R0
4R20
10R0
G
6CM
470p
6R21
10R0
6R20
10R0
G
6RM
10K0
G
7R10
5R11
7R9
5R11
fuse
1J1
RL5C
RL5A
RL5B
RL6A
RL6B
RL6C
+
-
AC
AC
2BR1
+
-
AC
AC
2BR2
1
2
3
2P3
2P1
L N
2CD 10N
2CB 10N
2CA 10N
2CC
10N
2CF 10N
2CE 10N
2CL
33V+
33V-
PCB
PCB2
BHA1 TX AC SEL R5
RED
VIO
RED
BLK
ORN
BRN
WHT
GRY
YEL
VIO
BLU
TF1
15V+
R2
G2
R1
V2
V1
2P2
2RA
120/240
2RB
100/220
2RC
100/12 0
2RD
120V
2RE
100V
2RF
220/240
+
2CM
2200u
+
2CP
2200u
JFSN JFSL
2CH 10N
2CG 10N
G6
CHAS
G
+
2CK
2CJ
100N
2QA
2RH
1K5
12V+
4RB
75K0
2P4 5P4
3P2
4P2
+
-
AC
AC
4BR1
+
4CR
22u

Bryston BHA-1 Specifications

General

Type	Headphone Amplifier
Frequency Response	20 Hz to 20 kHz ±0.1dB
Input Impedance	50kΩ
Inputs	2x XLR, 2x RCA
Outputs	4-pin XLR, 1/4 inch TRS
Gain	20dB high gain
Total Harmonic Distortion	Less than 0.005%
THD+N	Less than 0.005%