Diagrams; Ic Block Diagrams - Sony WM-FS421 Service Manual

WM-FS421

6-1. IC BLOCK DIAGRAMS

IC1 CXA1960Q
MPRM 31
V12M 32
33
MUTE
AAGC
34
DETO 35
MPXI 36
PLT2 37
PLT1 38
PLL1
39
PLL2 40
IC301 LB8115W-NA-TLM
COM
RI
S/S
PRE GND
PRE OUT1
PRE NF1
PRE OUT2
PRE NF2
PRE FWD IN1
PRE REV IN1
PRE FWD IN2
PRE REV IN2
10
SECTION 6

DIAGRAMS

30
29 28 27
MUTE
FM DET
AGC AMP
STEREO AUDIO R
MPX DECODER
STEREO AUDIO L
38kHz
PD VCO 1/2
19kHz
1 2
48 47 46 45 44 43 42
FWD/
REV
1
OSC
REF
VOLTAGE
OPERATION
DET
CURRENT
2
DET
BIAS
3
4
5
6
7
8
9
10
11
12
REF
SYS
CONT
R.F
13 14 15 16 17 18 19
25
26 24 23 22 21
AM RF FM RF
AMP AMP
TV RF
AMP
OL DET
FM LMT
150kHz
1/X
FM/TV
LPF
AM/FM: 1/2
PSN TV: 1/8
AM BPF
45kHz
TUNE
STID
1/2
PLAP
1.65V
3 4 5 6 7 8 9 10
41 40 39 38 37
FREQ
PRE DRIVER CARC.
OPERATION LOGIC
PLUSE DET
SPEED
REF VOLTAGE
FOR SPEED CONTROL
LOW
BOOST
DET
–
+
VREF
20 21 22 23 24
TVRO
20
REGV
19
1.25V
FM/TV OSC
18 FTLO
17 FMBF
1.25V
AMLO
16
AM OSC
15 FALC
14 PLLO
13 COMP
–
+
12 BAND
1.25V
11 TUNE
36
VSP
+
35
IN
34
MVREF
33
M-GND
32
LOW BOOST SW
31
DET OUT
30
LOW BOOST IN1
29
LOW BOOST IN2
28
R.P1
27
R. P2
26
LP.2
25
MIX OUT2