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J1
+6V
1
2
AC1
3
AC2
4
5
-27V
6
6P*2.0
D5
1N4148
1
2
D31
- 3mm Blue LED
R1
56K
C1
C2
0.1uF
10/10
R45
620
R56
1K2
R43 22K
2
Q13
3
C2458
1
C15
R44
100/10
22K
J2
D100-SRA-16
TO DECODE BOARD
1
OPTICAL ON/OFF
2
REMOTE
3
VIDEO ON/OFF
4
VFD-DATA
VFD-CLK
5
VFD-STB
6
VOL-B
7
8
VOL-A
9
10
MUTE
11
MUTE-DELAY
4094-CLK
12
4094-DATA(SER)
13
4094-ST
14
TV MUTE
15
C
16
VR3
1
2
3
EC16B241047AA
MASTER VOLUME
To enhance viewing, please print to A3
Cambridge Audio Azur 540R V2.0 AV Receiver
U1
HL-D135A
OPTICAL ON/OFF
VIDEO ON/OFF
POWER ON/OFF
MUTE
MUTE-DELAY
34
VEE
14
Vdd
33
Vdd
45
Vdd
52
OSC
IR1
RPM-638CBR-L
C3
C4
0.1uF
100/16
+6V
U4 TC4094(DIP16)
3
14
CLK
Q5
2
13
D
Q6
1
6
STR
Q3
15
12
OE
Q7
4
Q1
16
5
VDD
Q2
7
Q4
11
Q8
C7
9
QS
0.1uF
8
10
VSS
QS
Display Board PCB Schematic
D32
P11
1
2
1N4148
D1
P12
1
2
1N4148
D2
P13
1
2
1N4148
D3
P14
1
2
1N4148
D9
P15
1
2
1N4148
U2
UPD16311
10
KEY1
KEY1
11
KEY2
KEY2
12
KEY3
KEY3
KEY4
13
KEY4
-27V
+6V
R7
R6
Q3
100K
D30
1K
A1015
2
1
1
2
1N4148
R24 18K
R25
3K3
R9
Q1
1K
2SC2120
2
-27V
3
1
R13
R12
100K
1K
Q6
A1015 1
2
P20
R28 18K
R29
3K3
R14
1K
2
Q5
3
2SC2120
1
-27V
R21
Q12
R22
1K
A1015
100K
1
2
R34
18K
R35
3K3
R23
1K
2
Q11
3
2SC2120
1
S17
S18
S19
1
2
1
2
1
2
1
3
4
3
4
3
4
3
S1
S2
S3
1
2
1
2
1
2
1
3
4
3
4
3
4
3
S5
S6
S7
1
2
1
2
1
2
1
3
4
3
4
3
4
3
S9
S10
S11
1
2
1
2
1
2
1
3
4
3
4
3
4
3
S16
1
2
3
4
R2
R3
R4
10K
10K
10K
-27V
P19
+6V
R8
Q4
1K
A1015
1
2
R26
18K
R27
3K3
Q2
R11
2SC2120
1K
2
3
1
R15
Q8
1K
A1015
1
2
R30
18K
R31
3K3
R17
Q7
1K
2SC2120
2
3
1
R18
1K
1
2
P24
R32
Q10
18K
A1015
R33
3K3
R20
1K
2
3
1
S20
2
4
S4
2
4
S8
2
4
S12
2
4
R5
10K
R10
100K
P21
-27V
R16
100K
P22
-27V
R19
100K
P23
Q9
2SC2120
25
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