– 24 –
IC302 CXA1352AS
IC1 CXA1238S
r
IC Block Diagram (T
uner Section)
CONTROL
GRAPHIC EQUALIZER
GRAPHIC EQUALIZER
BIAS
15dB
15dB
29dB
29dB
400Hz
1kHz
4kHz
10kHz
DVCC
DC 2
IN 2
VCC
LINE
OUT 2
OUT 2
(FIX)
VG
100Hz
BAL
VOL
DC 1
IN 1
GND
LINE
OUT 1
OUT 1
(FIX)
OUT 1
(VARIABLE)
OUT 2
(VARIABLE)
ISET
21
22
2
3
5
4
6
7
8
9
10
1
11
12
13
14
15
16
17
18
19
20
VOLUME
VOLUME
REG
FM FRONT-END
AM FRONT-END
REG
AUTOBLEND
RIPPLE
FILTER
BAND PASS
MUTE
TUNING
INDICATOR
AM
IF / DET
GND
PLL LPF 1
PILOT DET
PILOT DET
ST IND/
VCO CHECK
RCH OUT
LCH OUT
VCC
RIPPLE
FILTER
AFC/AGC 1
AFC/AGC 2
GND
TUND IND
FM IF IN
AM IF IN
BAND SELECT
PLL LPF2
MPX REG
VCO
FM
DISCRI
MUTE
AM OSC
AFC
FM OSC
REG OUT
FM RF
AM RF IN
FM RF IN
FM/AM
FE OUT
GND
7
8
9
10
11
12
13
14 15
16
17
18
19
20
30
29
28
27
26
25 24 23 22
21
FM IF /
DISCRI
www. xiaoyu163. com
QQ 376315150
9
9
2
8
9
4
2
9
8
TEL 13942296513
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
