Cambridge Audio Azur 840A v2 Amplifier
P
re Amp Circuit Board - Headphone Driver
© COPYRIGHT
Audio Partnership PLC
Gallery Court
Hankey Place
LON
DON
SE1 4BB
+15V
-15V
R20
10R
1/4W Metal F
ilm
R21
10R
1/4W Metal F
ilm
2
3
1
8
4
U3:A
N
E5532
P
Audio Op Amp
R81
1/4W Metal F
ilm
1R
R82
1/4W Metal F
ilm
1R
R83
1/8W Metal F
ilm
2k
7
R88
1/8W Metal F
ilm
3k
3
R94
1/8W Metal F
ilm
560
R
R100
1/8W Metal F
ilm
560
R
R102
1/8W Metal F
ilm
5k
6
R103
1/8W Metal F
ilm
5k
6
Q1
BD13
9
NPN Po
wer
Q2
BD13
9
NPN Po
wer
Q3
BD14
0
PNP Power
R104
1/8W Metal F
ilm
180
R
C41
Met. Polyester
47nF
63V
C42
Met. Polyester
47nF
63V
6
5
7
U3:B
N
E5532
P
Audio Op Amp
R105
1/4W Metal Film
1R
R106
1/4W Metal F
ilm
1R
R107
1/8W Metal F
ilm
2k
7
R108
1/8W Metal F
ilm
3k
3
R109
1/8W Metal F
ilm
560
R
R110
1/8W Metal F
ilm
560
R
R111
1/8W Metal F
ilm
5k
6
R112
1/8W Metal F
ilm
5k
6
Q4
BD13
9
NPN Po
wer
Q5
BD13
9
NPN Po
wer
Q6
BD14
0
PNP Power
R113
1/8W Metal F
ilm
180
R
R114
1/2W Carbon
10R
R115
10R
1/2W Carbon
PREAMP OUT
R
R116
1/8W Metal F
ilm
100
R
P
REAMP OUT L
R117
1/8W Metal F
ilm
100
R
C43
Electrolyti
c
470uF
25V
C44
Electrolyti
c
470uF
25V
C45
10nF
63V
Polyester
C46
10nF
63V
Polyester
HP
R120
1/8W Metal Film
1k
5
R121
1/8W Metal Film
1k
5
R122
1/8W Metal Film
1k
5
R123
1/8W Metal F
ilm
1k
5
HP
HP
C47
680pF
50V
NP0 Ceramic
C48
680pF
50V
NP0 Ceramic
C49
100pF
50V
NP0 Ceramic
C50
100pF
50V
NP0 Ceramic
HP
W1
A
WIRE1
Black 18
AWG Insulated
Wire
W4
PHONES GND
PHONES R
PHONES L
+ HP Rail
- HP Rail
+ HP Rail
- HP Rail
- HP Rail
+ HP Rail
- HP Rail
+ HP Rail
RSW1
RSW2
R
L
GND
LSW1
LSW2
2
4
3
1
7
8
5
CN1
Stereo 6.35mm
Headphone Jack
TIP = LEFT
RING = RIGHT
PHONES DETECT
PHONES GND
PHONES R
PHONES L
PH D GND
PHONES GND
PHONES GND
W3
A
3
4
5
RL35:B
ME2-
9B
High Sensitive 2P2T Relay
6
7
8
RL35:C
ME2-
9B
High Sensitive 2P2T Relay
R84
1k
1/8W Metal F
ilm
R118
10k
1/8W Metal F
ilm
Q8
MP
SA14
NPN Darlingto
n
1
2
RL35:A
ME2-
9B
High Sensitive 2P2T Relay
D2
Rectifie
r
1N
400
4
+9V
RELA
Y
HP Mute
PHONES GND
SI1
TO12
6
SI2
TO12
6
SC1
M3x8mm MC
SC2
M3x8mm MC
WS1
M3
Hex N
u
t
5.5 x 2.4mm
WS2
M3
Hex N
u
t
5.5 x 2.4mm
Fixings for Thermal coupling of Q2-Q3 and Q5-Q6
24