Block Diagram - Sony Walkman WM-FX488 Service Manual

WM-FX488
Ver 1.1 2003.01
Q Q
4-2. BLOCK DIAGRAMS 3 7 6 3 1 5 1 5 0
IC1
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
1/8 or 1/16
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
T E
L 1 3 9 4 2 2 9 6 5 1 3
HP601
PLAY BACK HEAD
Q101
INA
29
L-CH
Q201
FWD
INB
30
R-CH
R-CH
Q202
VREF
REV
5
L-CH
Q102
VREF
Q301
INV.
VBAT
16 VCC
COM
W W
w w w 3
V
V
1
U
U
2
M601
CAPSTAN/REEL
MOTOR
TAPE SPEED
X1
(FM DISC)
11
QUAD
CF1
FM- FM- DET MPX
(FM IF)
OUT
FM MIX IF IN FM IN
4 8 12 13
MIX DET
IF BAFF
FM
OSC SW
CF3
AM- AM-
(AM-IF)
AM MIX IF IN AM
5 10
MIX
DET
AM
OSC VCC RF VCC
OSC BUFF
7
D402 T401 Q402
VBATT
Q401
T401,Q401
OSC
DC/DC CONVERTER
VREF
IC301
7
PRE/POWER
BST SW
AMP
RV301
Q305
AVLS
VOL
PRE PW
OUTA
IN A
4 8
PW
PRE IN C
21
OUTB
1 R-CH
BST OUT
22
RF & RET
MUTE
RF
BASE
VCC
OUT
26 25 16
VCC
Q302
VBAT
REF
IC601
CAPSTAN/REEL
MOTOR DRIVE
x a o
y
START
VREF 8
. i
10 7
RV601
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E, CH
6E
IC701 (1/2)
LOUT
16
SYSTEM
ROUT CONTROL
R-CH
15
JC2
STEREO/MONO,
LPF1
14 45
LOCAL/DX
IF
E, CH
COUNT
IFJN1
19 35
REQSW
20 42 IF-REQ
MODE-1
21 30
BAND1
MODE-2
22 31
BAND2
OSC OUT
23 38
OSCIN
26
Q703
44 RADIO ON
Q Q
3 7 6
40 DO(OT)
53
AVLS CTL
52 MB CTL
PW NFA
9
PW NFB 10
Q303
OUTA EQ SWITCH
19
OUTC
18
IC701 (2/2)
R-CH SYSTEM
CONTROL
PW MUTE
12 51 MUTE CTL
PRE MUTE
13
29
FWD/REV CTL
u 1 6 3
.
10 10
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2 4
8 9 9
S2
I LCD701
S16
LIQUID
COM1 CRYSTAL
I
DISPLAY
COM4
K4 26
S703
K3 25
PRESET/TUNING-
K2 24
K1 23
S706
ENTER
S710
PRESET/TUNING+
S707
SET
KO2 22
KO1 21
HOLD SW 36
S701
MODE2 49
VDD 6E
HOLD
E, CH ON
MODE1 48
VDD
IC703
OFF
RESET
6E
3 1 5 1 5 0 8 9 2
RESET VDD
54 4 OUT VCC 5
X-OUT 55
X701
75KHz
X-IN 56
BEEP
28
R-CH
R-CH
FWD/REV SW 46
BATT CHECK 34
TAPE 43
D701
PRE CTL 50
Q707
VDD
Q705
P-CTL 47
AMP CTL 32
m
VCC
Q704
c o
VBAT
• R-CH is omitted due to same as L-CH.
• Abbreviation
• Signal Path
CH : Chinese
E : No indication of country of origin
6E : Indication of country of origin
2
8 9 9
S709
AM
S707
MENU
S707
FM
S707
RADIO
OFF
4 9 8 2 9 9
J301
i
S302
N/R SW
S301
TAPE ON
BATT 1.5V
DRY BATTERY
SIZE"AA"
(IEC DESIGNATION LR6)
1PS,1.5V
: FM
: AM
: PB