Block Diagram - Sony WM-FX488 Service Manual

WM-FX488
Ver 1.1 2003.01
4-2. BLOCK DIAGRAMS
FM/AM FRONT END
IF DET, FM MPX
FM
RF IN
2
FMRFOUT
L2
29
L2
FM
FM-
TRACKING
RF
D2
FM/TV OSC
24
L3
FM-
OSC
D3
L4 CT1
AM
BAR ANTENNA AM RF IN
27
CT1,L4
AM B/P
28
AM
TRACKING
D1
L5
AM-OSC
L5 AM OSC
25
AM
FREQUENCY
COVERAGE
(VT) Q701,702
LPF
HP601
PLAY BACK HEAD
Q101
29
L-CH
Q201
FWD
30
R-CH
R-CH
Q202
REV
L-CH
Q102
VREF
Q301
INV.
VBAT
16 VCC
COM
W
W
3
V
V
1
U
U
2
M601
CAPSTAN/REEL
MOTOR
IC1
X1
(FM DISC)
11
QUAD
CF1
FM- FM- DET
(FM IF)
FM MIX IF IN FM OUT
4 8 12
MIX DET
IF BAFF
FM
OSC
1/8 or 1/16
CF3
AM- AM-
(AM-IF)
AM MIX IF IN
AM
5 10
MIX
DET
AM
OSC
OSC BUFF
D402 T401 Q402
Q401
T401,Q401
OSC
DC/DC CONVERTER
VREF
IC301
PRE/POWER
BST SW
AMP
Q305 RV301
AVLS
VOL
PRE PW
INA OUTA
IN A
4 8
PW
IN C
PRE
21
INB OUTB
1
R-CH
BST OUT
22
VREF
RF & RET
5
RF
BASE
VCC
OUT
26 25 16
VCC
Q302
VBAT
REF
IC601
CAPSTAN/REEL
MOTOR DRIVE
START
VREF 8
10 7
RV601
TAPE SPEED
E, CH
6E
LOUT
MPX
16
IN
13
ROUT
15 R-CH
JC2
LPF1
14
IF
E, CH
COUNT
SW 19
REQSW
20
MODE-1
21
MODE-2
22
OSC OUT
23
VCC RF VCC
7 26
Q703
VBATT
7
PW NFA
9
PW NFB 10
Q303
OUTA EQ SWITCH
19
OUTC
18
R-CH
PW MUTE
12
MUTE
PRE MUTE
13
10 10
IC701 (1/2)
S2
SYSTEM
I LCD701
CONTROL
S16
LIQUID
COM1
CRYSTAL
I
DISPLAY
STEREO/MONO,
COM4
45
LOCAL/DX
K4 26
35 IFJN1
K3 25
PRESET/TUNING-
K2
24
42 IF-REQ
K1 23
S706
ENTER
30 BAND1
31
BAND2
PRESET/TUNING+
S707
SET
38
OSCIN
KO2 22
KO1 21
HOLD SW 36
MODE2
49 VDD 6E
44 RADIO ON
E, CH
MODE1 48 VDD
IC703
RESET
6E
RESET 54 4 OUT VCC
40 DO(OT)
53 AVLS CTL
X-OUT 55
X701
75KHz
X-IN 56
52 MB CTL
BEEP 28
R-CH
IC701 (2/2)
SYSTEM
CONTROL
51 MUTE CTL
FWD/REV SW
46
BATT CHECK 34
TAPE 43
PRE CTL 50
Q707
29 FWD/REV CTL
P-CTL 47
AMP CTL 32
• Abbreviation
CH : Chinese
E : No indication of country of origin
6E : Indication of country of origin
S709
AM
S703
S707
MENU
S707
S710
FM
S707
RADIO
OFF
S701
HOLD
ON
OFF
5 VDD
R-CH
J301
i
S302
N/R SW
S301
D701
TAPE ON
VDD
BATT 1.5V
Q705
DRY BATTERY
SIZE"AA"
(IEC DESIGNATION LR6)
1PS,1.5V
VCC
Q704
VBAT
• R-CH is omitted due to same as L-CH.
• Signal Path
: FM
: AM
: PB