Yamaha RX-Z1 Service Manual page 49

IC9: LC7536-Y (FUNCTION P.C.B.)
Electric Controlled Volume
L 5dB IN 1
NC 2
L CT1
3
L CT2
4
L 5dB OUT 5
L 1dB IN 6
NC
7
L 1dB OUT 8
L VM 9
V EE
10
NC
11
S 12
VDD 13
VSS
14
NC
15
No. Name I/O
1 L 5dB IN I
2 NC
3 LCT1
4 RCT1
5 L 5dB OUT O
6 L 1dB IN I
7 NC
8 L 1dB OUT O
9 LVM
10 VEE
11 NC
12 S
13 VDD
14 VSS
15 NC
16 NC
17 CL I
18 DI I
19 CE I
20 NC
21 VCC
22 RVM
23 R 1dB OUT O
24 NC
25 R 1dB IN I
26 R 5dB OUT I
27 RCT2 I
28 LCT2
29 NC
30 R 5dB IN I
30 R 5dB IN
29 NC
R CT 1
28
R CT2
27
26 R 5dB OUT
25 R 1dB IN
NC
24
23 R 1dB OUT
22 R VM
VCC
21
NC
20
19 CE
18 DI
CL
17
NC
16
Input pin for the 5dB step attenuator
No connect pin
Loudness connections
Loudness connections
Output pin for the 5dB step attenuator
Input pin for the 1dB step attenuator
No connect pin
Output pin for the 1dB step attenuator
Volume common pin
Power supply pin
No connect pin
Pin that selects the address code in the data format
Power supply pin
Power supply pin
No connect pin
No connect pin
Input pin for control with serial data (clock)
Input pin for control with serial data (data)
Input pin for control with serial data (chip enable)
No connect pin
Power supply pin
Volume common pin
Output pin for the 1dB step attenuator
No connect pin
Input pin for the 1dB step attenuator
Output pin for the 5dB step attenuator
Loudness connections
Loudness connections
No connect pin
Input pin for the 5dB step attenuator
5 6 8 5 6 8 23 25 26 23 25 26
L5dB IN L5dB IN
1 1
L CT1 L CT1
3 3
L CT2 L CT2
4 4
LV M LV M
9 9
S S
12 12 LEVEL SHIFT LEVEL SHIFT
CE CE
19 19
LATCH LATCH
CLK CLK 17 17
DI DI
18 18 SHIFT REGISTER SHIFT REGISTER
2 7 11 15 16 20 24 29 2 7 11 15 16 20 24 29
NC NC
Function
RX-Z1/DSP-AZ1
R5dB IN R5dB IN
30 30
R CT1 R CT1
28 28
R CT2 R CT2
27 27
R VM R VM
22 22
VDD VDD
13 13
VCC VCC
21 21
14 14 VSS VSS
VEE VEE
10 10
48