Cambridge Audio 840A - Hub PCB; Hub PCB Schematics

Cambridge Audio Azur 840A Amplifier
AP163771/3 Hub PCB Schematic
3
2
1
84
U1:A
NE5532
5
6
7
U1:B
NE5532
C1
100nF
+24V
R1
47R
R2
47R
R3
12K
R4
4K7
C2
10pF
R5
12K
C3
10pF
ABUS GND
R6
12K
C4
10uF 25V
C5
10uF 25V
ABUS GND
Q1
BC327
R7
100R
R8
100R
R9
4K7
R10
10K
R11
22K
C6
100nF
R12
100R
VI
1
VO
3
GND
2
U2
7812
C7
100nF
C8
10uF 25V
ABUS GND
R13
10R 2W
D3
1N4004
+12V
R14
4K7
+12V
3
2
1
84
U3:A
NE5532
5
6
7
U3:B
NE5532
C12
100nF
+24V
R15
47R
R16
47R
R17
12K
C13
10pF
R18
12K
C14
10pF
ABUS GND
C15
10uF 25V
C16
10uF 25V
ABUS GND
ABUS GND
R
GND
L
GND
IR
STATUS
+24V
0V
+5V
3
OPT
1
GND
2
U4
TSOP1837 IR RECEIVER
R19
47R
C17
100nF
C18
10uF 16V
R20
470R
D5
1N4148
D6
1N4148
D7
BZX79C2V7
D8
BZX79C2V7
R21
10K
ABUS GND
R22
100R
R23
100R
R24
27K
R25
27K
ABUS GND
CN4
IR EMITTER OUTPUTS
R26
4K7
R27
4K7
R28
10K
ABUS GND
R29
12K
SIG GND
C20
47U 25V
R30
12K
C21
47U 25V
R31
12K
C22
47U 25V
R32
4K7
R33
4K7
SIG GND
STATUS
IR
HUB - INPUT PCB CONN
LOGIC GND
SIG GND
Q2
BC337
+5V
LOGIC GND
ABUS GND
RIGHT
LEFT
SWITCHER DATA OUT
SWITCHER CLOCK OUT
SWITCHER STROBE OUT
LOGIC GND
+5V
RA7/OSC1/CLKIN
16
RB0/INT
6
RB1/RX/DT
7
RB2/TX/CK
8
RB3/CCP1
9
RB4/PGM
10
RB5
11
RB6/T1OSO/T1CKI
12
RB7/T1OSI
13
RA0/ANO
17
RA1/AN1
18
RA2/AN2/VRef
1
RA3/AN3/COMP1
2
RA4/T0CKI/CMP2
3
RA6/OSC2/CLKOUT
15
RA5/MCLR/THV
4
VSS
5
VDD
14
U5
PIC16F627-04/P
LOGIC GND
C23
100nF
LOGIC GND
+5V
R35
100R
R36
100R
R37
27K
R38
27K
ABUS GND
CN6
IR EMITTER OUTPUTS
Q3
BC337
+12V
R39
4K7
ABUS GND
C24
47U 25V
R40
4K7
R41
4K7
+24V IN
78L12
IN OUT
LOOKING AT LEADS
C28
47uF 25V
C25
47U 25V
C26
47U 25V
C27
47U 25V
F1
POLYFUSE 1-1A
F2
POLYFUSE 1-1A
R42
10K
R43
10K
C10
10uF 16V
GND
1+G
+
2
-
3
CN7
XLR FEMALE
GND
1+G
+
2
-
3
CN8
XLR FEMALE
IR OUT
IR IN
IR IN
IR IN
CN9
JACK-CKX-3.5-12
3.5mm JACK
+5V
3
OPT
1
GND
2
U6
TSOP1836 IR RECEIVER
+5V
LOGIC GND
R44
220R
1
2
3
U7:A
4011
VDD=+5V
R45
220R
1
2
6
5
4
NC
3
U8
OP4N25
5
6
4
U7:B
4011
VDD=+5V
VSS=LOGIC GND
8
9
10
U7:C
4011
VDD=+5V
12
13
11
U7:D
4011
VDD=+5V
R46
220K
R47
10K
R48
10K
+5V
LOGIC GND
R49
2R2
R50
100R
Q4
BC337
R51
10K
LOGIC GND
C11
100nF
LOGIC GND
1
3
2
CN2
RICCO PCB JACK
C29
100nF
INPUT 1 LEFT +
INPUT 1 LEFT -
XLR GND
INPUT 1 RIGHT +
INPUT 1 RIGHT -
LEFT
RIGHT
INPUT 1: BALANCED INPUTS
SIG GND
+5V
LOGIC GND
C30
100nF CERAMIC
FEMALE
RS232 & IR CABLE FROM FRONT PANEL PCB
TX
RX
9
10
11
12
13
14
15
16
CN1:B
VERT2RJ45
GND
17
GND2
18
GND3
19
GND4
20
GND5
21
GND6
22
CN1:C
VERT2RJ45
CHASSIS GND
A-BUS A
A-BUS B
1
2
3
4
IR IN
36K
36K
GND
GND
MCLR HUB
PGM
MCLR HUB
RS232 CONN
PROGRAM_DATA
PROGRAM_CLK
PROGRAM_DATA
PROGRAM_CLK
R34
47R
C31
10uF 16V
C32
100nF
C33
47pF
ABUS GND
C34
47pF
ABUS GND
C35
47pF
ABUS GND
C36
47pF
ABUS GND
4
3
2
1
CN16
CONN-2.5PH-SIL4
RX
TX
GND
CHAS
+24V
37 kHz
36 kHz
TOP OF CONN
BOTTOM OF CONN
Q5
BC337
R52
10K
R53
100K
Q6
BC337
R54
10K
PIC TX
BLOCK
HUB CLOCK OUT
HUB DATA OUT
HUB CLOCK OUT
HUB DATA OUT
1
2
3
4
5
6
7
8
9
10
12
13
11
CN15
FFC 13WAY
LOGIC GND
PGM
IR receiver
A
K
D2
CA IR DEMODULATOR
IR receiver
A
K
D1
CA IR DEMODULATOR
1
2
3
4
5
6
CN5
JST 2,5MM B6B-XH-A
XLR GND
CONN TO INPUT PCB
1
2
3
4
5
6
7
8
9
10
CN3
FFC 10WAY
HUB IN R
HUB IN L
RIGHT
RIGHT
LEFT
LEFT
R
GND
L
GND
IR
STATUS
+24V
0V
STATUS LINE DRIVER
R55
10K
ABUS GND
XLR GND
1
2
3
4
5
6
7
8
CN1:A
VERT2RJ45
R56
390K
R57
100K
LOGIC GND
+24V IN
+24V IN
+24V DETECT
1
2
5
CN10:A
AV2-8,4-14/EC
3
4
5
CN10:B
AV2-8,4-14/EC
C39
1N 50V NP0
R58
10K
+5V
F3
POLYFUSE 1-1A
CHASSIS GND
R59
47K
R60
47K
C9
220U 35V EL
C19
220U 25V EL
C37
220U 25V EL
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