Hub Pcb Schematic - Cambridge Audio 840A Service Manual

INPUT 1: BALANCED INPUTS
XLR FEMALE
CN8
1+G
GND +
RIGHT
2
-
CN5
3
1
INPUT 1 RIGHT +
2
INPUT 1 RIGHT -
3
XLR GND
XLR GND
4
XLR GND
5
INPUT 1 LEFT +
6 XLR FEMALE
INPUT 1 LEFT -
CN7
1+G
GND + LEFT
JST 2,5MM B6B-XH-A 2
-
CONN TO INPUT PCB
3
HUB - INPUT PCB CONN
HUB IN L
HUB IN R
LOGIC GND
SWITCHER DATA OUT
SWITCHER CLOCK OUT
SWITCHER STROBE OUT
+5V
C10
C23
10uF 16V
100nF
RA7/OSC1/CLKIN RA0/ANO
16 17
RA6/OSC2/CLKOUT RA1/AN1
15 18
RA2/AN2/VRef
1
RA5/MCLR/THV RA3/AN3/COMP1
4 2
LOGIC GND RA4/T0CKI/CMP2
3
RB0/INT
6
RB1/RX/DT
7
RB2/TX/CK
MCLR HUB 8
RB3/CCP1
9
RB4/PGM
10
RB5
11
RB6/T1OSO/T1CKI
12
RB7/T1OSI
13
U5
PIC16F627-04/P
LOGIC GND
+5V
CA IR DEMODULATOR
U6
D1
36 kHz
TSOP1836 IR RECEIVER
R44
A
R34
220R
47R
IR receiver
K
JACK-CKX-3.5-12
CN9
C31
C29
10uF 16V
100nF
LOGIC GND
U7:A
1
3
IR IN
2
4011
VDD=+5V
IR IN
R46
CN10:A +5V
LOGIC GND 220K
U8
AV2-8,4-14/EC
R45
1 1 6
2
220R 5
2
R51
3 4
NC
10K
OP4N25
R47
10K
RS232 CONN R53
CN15 CN16
100K
LOGIC GND
1
TX TX R48
2 1
RX RX
3 2
GND GND Q4 Q6
4 3 10K
IR IN CHAS
BC337
5 4 BC337
GND
6
PGM CONN-2.5PH-SIL4
7
MCLR HUB FEMALE
8
PROGRAM_DATA
9
PROGRAM_CLK
10
BLOCK LOGIC GND
11
PIC TX
C30 R54
12
HUB DATA OUT
13 100nF CERAMIC 10K
HUB CLOCK OUT
FFC 13WAY
LOGIC GND
RS232 & IR CABLE FROM FRONT PANEL PCB
To enhance viewing, please print to A3
Cambridge Audio Azur 840A Amplifier
RIGHT
36K
SIG GND
CN3
1
2
3
SIG GND
4 LEFT
SIG GND
5 +5V 36K
+5V
6
7 R59 R60
8
47K 47K
9
10
FFC 10WAY
LOGIC GND
C6
100nF
R12
100R
ABUS GND
HUB CLOCK OUT
HUB DATA OUT SIG GND
STATUS
+24V IN
R56
390K
PROGRAM_DATA
PROGRAM_CLK
+24V DETECT
+5V
+5V
R57
100K
R11
R58
10K
22K
R19
47R
PGM LOGIC GND
IR IN
C18
C17
3.5mm JACK ABUS GND
10uF 16V
100nF CA IR DEMODULATOR
A
+5V
3
GND
2
OPT
IR 1 IR receiver
K
U4
TSOP1837 IR RECEIVER
D2
37 kHz
LOGIC GND
U7:D
12 IR OUT
11
CN10:B
13
AV2-8,4-14/EC
R50
4011 3
VDD=+5V 4
100R
U7:C
8
R52
10
10K 9
C39
4011
VDD=+5V
1N 50V NP0
CHASSIS GND
5
4
6 C11
100nF
U7:B
Q5 4011
VDD=+5V
BC337
VSS=LOGIC GND
R49
LOGIC GND
2R2
AP163771/3 Hub PCB Schematic
LOOKING AT LEADS
IN OUT
R55 R28
78L12
10K 10K
C37 C19
220U 25V EL 220U 25V EL
ABUS GND ABUS GND
C27 R26
4K7
47U 25V
C20
R14
4K7
47U 25V
C26
R27
4K7
47U 25V
C21
R4
4K7
47U 25V
+12V
C25
R40
4K7
47U 25V
R10
10K
C22
R32
Q1
BC327 4K7
47U 25V
R9
R7
4K7
100R
Q2
R8
BC337
100R
C28
R41
R42 R43 4K7
47uF 25V
10K 10K
C24
R33
4K7
STATUS LINE DRIVER
47U 25V
D5 D7
1N4148 BZX79C2V7
D6 D8
1N4148 BZX79C2V7
+12V
Q3
BC337
R20 R21 R39
470R 10K 4K7
ABUS GND ABUS GND
+12V
+24V IN
+24V
U2
D3 F3
7812
R13
3 1
VO VI
10R 2W
C9
1N4004 POLYFUSE 1-1A
C8
C7 C32
220U 35V EL
100nF 100nF
10uF 25V
ABUS GND
+24V
R6
C1
12K
100nF
ABUS GND
U1:A C4
3
R1
1
2
47R
10uF 25V
NE5532
RIGHT
A-BUS A
C33
47pF
ABUS GND
R5
R29 ABUS GND
12K
C3
12K
10
11
10pF
12
13
14
U1:B
15
C5
5
R2 16
7
6 POLYFUSE 1-1A
47R
10uF 25V F1
NE5532 LEFT
C34
47pF
R3
12K
C2
ABUS GND
10pF
+24V
C12
R30
12K
100nF
ABUS GND
U3:A C15
3
R15
1
2
47R
NE5532 10uF 25V
RIGHT
C35
47pF
ABUS GND
C14
ABUS GND
10pF
R18
12K
R31
U3:B
12K
C16
5 R16
7
6 POLYFUSE 1-1A
47R
10uF 25V
F2 A-BUS B
LEFT
C36
NE5532 BOTTOM OF CONN
47pF
R17
12K
C13
ABUS GND
10pF
CN4
IR EMITTER OUTPUTS
R22
100R
R24
R25 27K
R23
27K
100R
ABUS GND
CN6
IR EMITTER OUTPUTS
R35
100R
R37
R38 27K
R36
27K
100R
ABUS GND
CN2
2
1
3
RICCO PCB JACK
+24V IN
TOP OF CONN
CN1:B
9
GND
L
GND
IR
STATUS
R
0V
+24V
VERT2RJ45
CN1:C
17
GND
18
GND2
19
GND3
20
GND4
21
GND5
22
GND6
VERT2RJ45
CHASSIS GND
CN1:A
8
GND
7
L
6
GND
5
IR
4
STATUS
3
R
2
0V
1
+24V
VERT2RJ45
1
2
3
4
39