10
WM-FS421
SECTION 6
DIAGRAMS
6-1. IC BLOCK DIAGRAMS
IC1 CXA1960Q
IC301 LB8115W-NA-TLM
+
–
12
13
14
19
15
TVIN
MREF
GRND
FMIB
IFCT
NC
FMIN
FMRO
OLAG
ARFI
REGV
TVRO
FTLO
BAND
TUNE
PLLO
FALC
COMP
37
38
39
40
AAGC
DETO
PLT2
MPXI
MPRM
V12M
MUTE
PLT1
PLL1
PLL2
MPX DECODER
AM BPF
PSN
1/X
FM/TV
LPF
PD
VCO
1/2
1/2
STID
14V
PLAP
TUNE
38kHz
STEREO AUDIO R
STEREO AUDIO L
19kHz
1.65V
1.25V
36
8 9
10
VCO
STID
MCNT
GRND
VCC
1
4
2
3
5
6
MPRG
LOUT
ROUT
DDCN
PLLI
7
+
–
+
–
35
34
FM DET
150kHz
FM LMT
OL DET
TV RF
AMP
FM RF
AMP
AM RF
AMP
45kHz
31
32
33
MUTE
AGC AMP
AM AGC
1.25V
AM/FM: 1/2
TV: 1/8
1.25V
18
17
16
FMBF
AMLO
AM OSC
FM/TV OSC
20
30
29
27
28
23
24
25
26
22 21
11
1
2
36
35
34
33
32
31
30
29
28
27
26
25
13
14
15 16 17
18 19
20 21 22
23 24
48 47 46 45 44 43
42
41
40
39
38
37
COM
RI
VREF
POWER OUTC
POWER OUT2
VCC
POWER MUTE
POWER IN1
POWER IN2
MIX OUT1
MIX OUT2
LP.2
R. P2
R.P1
DET OUT
MVREF
IN
+
VSP
LOW BOOST IN2
LOW BOOST IN1
LOW BOOST SW
M-GND
R.VREF
PRE MUTE SW
(FWD/REW)
POWER OUT1
POWER GND
MVCC
DR
WOUT
MP-GND
VOUT
UOUT
FC
OUT
OSC
UB
VB
WB
3
4
5
6
7
8
9
10
11
12
PRE NF1
PRE OUT2
PRE NF2
PRE FWD IN2
PRE REV IN2
PRE REV IN1
PRE FWD IN1
S/S
PRE GND
PRE OUT1
BIAS
R.F
REF
SYS
CONT
DET
VREF
SPEED
LOW
BOOST
PRE DRIVER
OPERATION LOGIC
OSC
PLUSE DET
REF
VOLTAGE
REF VOLTAGE
FOR SPEED CONTROL
CURRENT
DET
OPERATION
DET
FWD/
REV
FREQ
CARC.
+
–
