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Main Board
U902: LC72723M
Vdda
3
REFERENCE
VOLTAGE
ANTIALIASING
FILTER
DATA
DECODER
VREF
1
VREF
FLOUT
5
CIN
6
PLL
(57kHz)
CLOCK
RECOVERY
(1187.5Hz)
+
_
Vddd
11
Vssd
10
RDDA
14
RDCL
15
MODE
12
RST
13
RDS-ID/READY
16
Vssa
4
MPXIN
2
TEST
7
TEST
57kHz
BPF
(SCF)
SMOOTHING
FILTER
OSC
CLK(4.332MHz)
9
XIN
8
XOUT
RDS-ID
DETECT
RAM
(128bits)
21
22
16
15
20
23
8
7
17
14
13
12
11
10
9
5
4
3
2
18
19
24
1
6
XIN
FMIN
AMIN
CE
DI
CL
D0
OUT0 OUT1
XOUT
PHASE DETECTOR
CHARGE PUMP
REFERENCE
DIVIDER
SWALLOW COUNTER
1/16, 1/17 4 BIT
SHIFT REGISTER
LATCH
UNIVERSAL
COUNTER
1
2
12-BIT PROGRAMMABLE
DIVIDER
SYC
OUT2 OUT3 OUT4 OUT5 OUT6
IN0
IN1
V
SS
V
DD
LCTR
HCTR
PD2
PD1
Main Board
U903: LC7218-E
Summary of Contents for C 425
Page 1: ...NAD C 425 STEREO AM FM TUNER C 425 STEREO AM FM TUNER SERVICE MANUAL...
Page 8: ...8 ADJUSTMENT POINTS DIAGRAM OSC RF VT...
Page 11: ...11 PCB LAYOUT POWER SUPPLY BOARD DISPLAY BOARD LED BOARD KEY BOARD...
Page 12: ...12 MAIN BOARD...
Page 32: ...SERVICE MANUAL NAD 2006 C 425 STEREO AM FM TUNER NAD ELECTRONICS INTERNATIONAL TORONTO...