Front Panel Pcb Schematic - Cambridge Audio 540A V2 Service Manual

+5V
J14
2,5MM 2W 90 HEADER
CN10
CRS1
R18
TERMINAL
C8
10k
10N 50V NP0
1
HP Detect
2
DGnd
DGND DGND
FREQ=4MHz
R19
MCLR
10k
U2
1
MCLR/Vpp RB7/PGD
2 28
RA0/AN0 RB6/PGC
3 27
RA1/AN1 RB5
26
4
RA2/AN2 RB4
25
5
RA3/AN3/Vref RB3
6 24
RA4T0CKi RB2
7 23
RA5/AN4/SS RB1
22
8
Vss2 RB0/INT
9 21
OSC1/CLKI VDD
DGND 10 20
OSC2/CLKO VSS
19
11
Switch Strobe
RC0/T1OSO/T1CKI RC7
18
12
Clock
RC1/T1OSI RC6
13 17
Data RC2/CCP1 RC5/SDO
16
14
LED Strobe RC3/SCK/SCL RC4/SDI/SDA
15
PIC16F72I/SP
+5V
R21 R16 R17 R22
10k 10k 10k 10k
Q1
BC337
R26
10k
DGND
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Cambridge Audio Azur 540A V2.0 Amplifier
CN9
C9
2,5MM 6W 90 HEADER
+5V
+5V
100n
LK5
Chassis U3
LINK10MM
LK1
LINK10MM
DGND
MCLR
15
OE
1
LED Strobe
STB
3
Clock CLK
2
Data D
74HC4094
vol up
+5V
vol down
IR In R10
22R
Clock
CN7
R11
22R
1
C7
Data
R9 2
22R
100n 3
Switch Strobe
4
LK3
5
IR In
6
LINK10MM
7
ABUS IR DGND
ABUS Status
ABUS IR
2,5MM 7W 90 HEADER
ABUS Status
DGND
CN6
LK8
8
Speaker A Relay
7
LK15MM Clip
6
DC
5
Standby Relay
4
VI/Short
3
Temp
2
1
R8
10k
H8 2.54mm 90
DGND
LK6
DGND
LINK10MM
SW1 SW6
TUNER CD
SW2 SW5
AV PHONO/AUX
SW3 SW4
TAPE MON DVD
AP17657/1 Front Panel PCB Schematic
DGND
R20
220R
10
QS
9
DGND
QS
11
Q7
12
Q6
13
Q5
14
Q4
7
Q3
6
Q2
5
Q1
4
Q0
+5V
R7
220R
LK2
I2C Clock
LK7,5MM
I2C Data
DGnd
I2C Switch Strobe
R6
CA Control Bus IR
ABUS IR
10k
ABUS Status
DGND
IR In
2,5MM 6W 90 HEADER
R5
220R
Q2 R23
R4
SNAP OFF SECTION (d)
BC337 220R
10k
J9
J10
TERMINAL
(1)
DGND
TERMINAL
LK4
LINK10MM
DGND
D2 D3 D4 D5 D6
CHANNEL LED CHANNEL LED CHANNEL LED CHANNEL LED CHANNEL LED
LK7
LINK10MM
J16 SNAP OFF SECTION (c)
TERMINAL
(1) J17
TERMINAL
D8
Blue flat top LED
R13
CN5 CN8 Standby
1 1
10k
2 2
3 3
SW7
4 4
STANDBY
5 5
6 6
C10
U4
2,5MM 6W 90 HEADER
no stuff
+5V
3
GND
2
OPT
1
R15
47R
IR REC 3/5V 36KHZ
D9
LED 3MM RED
protection
R3
2R2
U1
1
vol up
FIN
2
GND1
3
RIN vol down
4
C6
NC
C5 5
220U 16V EL GND2
6 CN4
100n
VCC
7
OUT2
8 C4
2
COM
9
100n
OUT1 1
H2 2.54mm 90
BA6218
MOTOR
DGND
R12
220R
D7
CHANNEL LED
R14
47R
C12
10U 16V EL
C11
100nF 50V X7R
19