WM-FX888
20
20
• IC Block Diagrams
IC1
TA7371AF-EL
RF OUT
VCC
MIX OUT
7
6
OSC
RF IN
GND
DFC
DIODE (C)
AFC
DIODE (A)
5
8
1
2
3
4
RF
AMP
MIX
AMP
OSC
REGULATOR
IC2
TA2022AFN-EL
AM IF
PILOT
AM
FM
OSC
FM
IF AMP
FM DET
AF AMP
SWITCH
ST
IND
AM DET
AGC
STOP
PULSE
MIX
AM
IF AMP
VREF
OSC
FM IF IN
MIX OUT
VCC
AM IF IN
QUAD
AGC
GND
IF OUT
IF REQ
SP OUT
AM RF IN
PW SW
DET OUT
PILOT IN
MPX IN
LPF 2B
LPF 2A
VCO
LPF1
ROUT
LOUT
ST IND
1
7
8
9
10
11
12
6
5
4
2
3
19
20
21
22
23
24
18
17
16
15 14
13
φ∠
0
°
VCO
φ∠
90
°
DIVIDE
PRE
DECODE
IC301
TA2123AF (EL)
MIX
PW B
PW A
PW C
BST
MT TC
BASE
RF IN
PW GND
OUT B
OUT C
OUT A
VCC
RF OUT
VREF OUT
BST NF
BST OUT
PW IN C
LPF
EQ A
PW NF A
PW IN A
PW IN B
PW NF B
3
IN A-R
5
PRE NF-A
6
PRE OUT A
7
MTL DRV A
8
MTL DRV B
9
PRE OUT B
10
PRE NF-B
11
AMS IN
12
IN B-R
4
IN B-F
2
IN A-F
1
21
20
19
18
17
GND
16
AMS DET
15
AMS MIX
14
AMS SW
13
22
23
24
38
C-AMP SW 37
PW SW 42
MT SW 41
F/R SW 44
BST SW
43
M/N SW 46
PRE GND 47
VREF IN 48
PRE SW 45
AMS OUT 40
BEEP 39
26
27
28
29
30
31
32
33
34
DET
36
AGC IN
35
+
–
+
–
+
–
+
–
EQ B
25
RIPPLE
FILTER
AGC
DET
VREF
COMPARATOR
MTL DRV
IC302
NJM2185AV-TE2
8
9
10
14
13
12
2
1
3
A-CH BLOCK
11
7
6
5
4
G2
G1
V/I
WEIGHT
BIAS
CIRCUIT
+
–
+
–
GM
SUM
V+
SW
VEXT
OUT
A
DCA
DET
A
INA
GND
IREF
VREF
OUTB
DCB
DETB
INB
B-CH BLOCK: SAME AS A-CH.
IC601
MM1279XVBE
V
1
PW
2
W
3
GND
4
OSC
5
DR
6
VREF
7
START
8
VSP
9
IN+ 10
PV
20
U
19
PU
18
GND
17
VCC
16
FC
15
TC1
14
TC2
13
R1
12
OUT
11
MOTIVE
CONTROL
CIRCUIT
MOTIVE/
OSC
MOTIVE
LOGIC
SOFT SWITCH
PRE DRIVER
INVERTER
BIAS
REFERENCE
VOLTAGE
SPEED
CONTROL
CURRENT
CONTROL
OUTPUT
BIAS
+
–
IC801
XC6383C251ML
+
–
+
–
CHIP ENABLE
V REF
VDD
2 STEP PFM CONTROL
OSC 100/180 kHz
VLx LIMITER
BUFFER
1
2
3
4
5
CE
V OUT
NC
LX
VSS
w w w . x i a o y u 1 6 3 . c o m
Q Q 3 7 6 3 1 5 1 5 0
9
9
2
8
9
4
2
9
8
T E L
1 3 9 4 2 2 9 6 5 1 3
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
