NAD L 70 Service Manual page 22

SAA6579TV1 (RDS FILTER IC82)
MPX
signal 4
MUX
330 pF
SCOUT
8
560 pF
CIN
7
V DDA
5V
5
0.1
V ref
3
TC74 HCU04AFN (INVERTER IC31)
1A 1
1Y 2
2A 3
2Y 4
3A 5
3Y 6
GND 7
57 kHz
ANTI-
BANDPASS
ALIASING
(8th ORDER)
FILTER
COSTAS LOOP
CLOCKED
VARIABLE AND
COMPARATOR
FIXED DIVIDER
V p1
CLOCK
REFERENCE
REGENERATION
VOLTAGE
AND SYNC
6
V SSA
14
Vcc
13 6A
12 6Y
11 5A
10 5Y
9 4A
4Y
8
47 pF
4.332/8.664 MHz
OSCI
13
OSCILLATOR
RECONSTRUCTION
FILTER
DIVIDER
BIPHASE
SYMBOL
DECODER
SAA6579
TEST LOGIC AND OUTPUT
SELECTOR SWITCH
9
MODE
74LCX08 (IC15: AND GATE)
74VHC08 (IC83 : AND GATE)
1
A0
2
B0
3
O0
4
A1
5
B1
6
O1
7
GND
2-23
82 pF
5V
0.1
2.2 kΩ
V DDD
OSCO
14 12
QUALITY BIT
AND
GENERATOR
DIFFERENTIAN
DECODER
16
15
10 11
V SSD
TEST
14
13
12
11
10
QUAL
1
RDDA
2
RDCL
T57
MEH162
Vcc
A2
B2
O2
A3
9
B3
8
O3