WM-GX410
20
20
4-9. IC Block Diagram
IC1 CXA1960Q
IC302 CXA2500N-T4
+
–
12
13
14
19
15
TVIN
MREF
GND
FMIB
IFCT
NC
FMIN
FMR
O
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
GND
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
REFERENCE
MIC INPUT (L)
PB OUTPUT (L)
REC DRIVE INPUT (L)
REC DRIVE OUTPUT (L)
AGC TIME CONST
ANT
TAPE/TUNER SELECTOR
1
2
PB PRE INPUT (L)
PB NF (L)
3
4
5
PB EQ SWITCH (L)
TUNER INPUT (L)
LINE OUTPUT (L)
6
7
8
9
10
11
12
REC DRIVE OUTPUT (R)
VCC
PB/REC SELECTOR
13
14
15
PB OUTPUT (R)
PB NF (R)
PB PRE INPUT (R)
MIC INPUT (R)
GND
20
21
22
23
24
TUNER INPUT(R)
PB EQ SWITCH (R)
18
19
REC DRIVE INPUT (R)
LINE OUTPUT (R)
16
17
TAPE/
TUNER
REF
AGC
MIC
NORM/
METAL
GCA
PB
LINE
REC
AGC
DET
AMP
AGC
MIC
GCA
PB
LINE
REC
AGC
DET
AMP
MIC
GCA
PB
LINE
REC
AMP
PB/
REC
6dB
22dB
12dB
-0.3dB
20.5dB
IC301 LB1979LV-TLM-E
FC GND
VCC
VCC
FC
WB
VCC
NC
UOUT
VOUT
WOUT
P-GND
VB
UB
GND
TO
CONTROL
BLOCKS
TO
EACH
BLOCKS
RI
OUT
VSP
IN+
VREF
S/S
COM
OSC
7
5
4
3
1
2
6
8
9
10
11
12
13
14
15
16
18
20
19
STARTING
DETECT
POWER
SUPPLY
BIAS
OSCILLATING
CIRCUIT
SPEED CONTROL
REFERENCE VOLTAGE
REFERENCE
VOLTAGE
CURRENT
DETECT
SPEED
DETECT
WAVEFORM DETECT
COMMUTATION STARTING LOGIC
SOFT SWITCH
PRE DRIVER
+
–
17
