NAD C420 Service Manual page 17

U902: LC72723M
Vdda
3
REFERENCE
VOLTAGE
Vssa
4
MPXIN
ANTIALIASING
2
FILTER
TEST
TEST
7
U903: LC7218
XIN
1
XOUT 24
FMIN
19
AMIN
18
CE
2
DI
3
CL
4
D0 5
V REF FLOUT CIN
1 5 6
V REF
57kHz
BPF
SMOOTHING
(SCF)
FILTER
CLK(4.332MHz)
OSC
9
X IN
REFERENCE
DIVIDER
1 SWALLOW COUNTER
2
12-BIT PROGRAMMABLE
SHIFT REGISTER
LATCH
9 10 11
OUT0 OUT1 OUT2 OUT3 OUT4 OUT5 OUT6
+
PLL
_
(57kHz)
8
X OUT
SYC
6
PHASE DETECTOR
CHARGE PUMP
1/16, 1/17 4 BIT
DIVIDER
12 13 14 17
19
CLOCK
RECOVERY
(1187.5Hz)
DATA
DECODER
RAM
(128bits)
RDS-ID
DETECT
21
22
16
15
UNIVERSAL
COUNTER
20
23
7 8
IN0 IN1
Vddd
11
Vssd
10
RDDA
14
RDCL
15
MODE
12
RST
13
RDS-ID/READY
16
PD1
PD2
HCTR
LCTR
V
DD
V
SS