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QQ
3 7 63 1515 0
• IC Block Diagrams
– MAIN Board –
IC101
LA1823
TE
L 13942296513
IC102
LC72131
www
.
http://www.xiaoyu163.com
24
23
22
21
20
19
GND2
VCC2
FM
OSC
FM
RF
FM
MIX
AM
AM
RF
MIX
AM
OSC
OSC
BUFFER
REG
VCC1
GND1
1
2
3
4
5
6
22
21
19
18
20
PHASE
DETECTOR
CHARGE PUMP
REFERENCE
UNLOCK
DIVIDER
DETECTOR
SWALLOW COUNTER
CCB
INTERFACE
1
2
3 4 5 6
x
ao
u163
y
i
http://www.xiaoyu163.com
2 9
8
18
17
16
15
MUTE
PHASE
DECODER
COMP
ST SW
VCO
FF
FF
TRIG
FM
S-METER
SD
ST
FM
IF
IF
BUFFER
7
8
9
10
Q Q
3
6 7
1 3
17
16
POWER
1/2
ON
RESET
1/16, 1/17 4BITS
12BITS
PROGRAMMABLE
DRIVER
DATA SHIFT REGISTER LATCH
7 8 9 10
11
.
9 4
2 8
14
13
PILOT
FM
DET
DET
FF
AM
AGC
DET
AM
IF
11
12
1 5
0 5
8
2 9
9 4
15
14
13
12
UNIVERSAL
COUNTER
m
co
HCD-EP305
9 9
2 8
9 9
27
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