Sony Walkman WM-FX481, Service Manual

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11 11
WM-FX481
4-3. SCHEMATIC DIAGRAM
z
Refer to page 14 for Notes.
z
Refer to page 14 for Waveforms.
z
Refer to page 14 for IC Block Diagrams.
IC1
M601
HP2
HP3
HP4
C101 C201
R7
R5
R6
C17
C18 C19
R8
C23
C21
R10
D4
R20
C74
R12
R13
C32
C75
R17
C31
C30
C72
R15
C40
C73
C26 D2
C34
R11
R18
R14 C33
C29
D1
C24
CT1 C22
R9
C36 C39
C20
RV2
C16
C5
C6
C9
C11
C12
R3
C3
L2 C15
C14 C13
C205 C105
R202 R201
C203
R204
C204
C311
R203 R103
C103
R102 R101
R601 R602
R104
C104
C301
R301
R603
C601
C605 C604 C603 C602
C606
R604
C607
RV601
R605
R304
C308
FB302
C307
C106
C206
R303
C306
R200
C111
R501
C501
R502
C502
R503
R504
C712
D703
C503
R305
C721
C714
C711
C709
R404
C702
C706
D404
D704
R720
C705
R718 C710
C704
C703
R716
S713 S710
S712 S709
S705 S702
S703 S706
S707 S704
R714
R715
R708
C701
IC701
R701
R706
R704
R707
R731
R721
R703
R702
Q701
R722
C309
R106 R206
R207
J301
IC301
C35
R4
C7
C8
C202 C102
R710
R711
R713
R712
C25
C28
TP1
C211
JC5
R40
Q4
LCD701
R22
Q501
Q502
X701
C707
C708
L402
220
µ
H
R717
R709
L702
S701
S302
S301
R107
FB301
0
µ
H
FB101
0
µ
H 0
µ
H
FB201
R607
TH601 R606
R108
R208
R205 R105
Q200
RV301
C207
C107
Q301
RV1
JC1
C4
R2
R21
D5
JR3
L7
L4
L1
0.1
µ
H
0.1
µ
H
Q3
IC702
C10
C302 C303
C305 C312 C108 C208
C304
R302
L6
CXA1960Q
470p 470p
10k
10k
1.5k
10
16V
10k
22
4V
0.01
10k
MA357
1k
1000p
33
220
1000p
0
10k
0.01
10
16V
1000p
100k
1000p
1000p
1000p MA357
1000p
10k
100k
2.2k 1000p
10p
SVC347T
0.01
10p 10p
0
0.01 1000p
1
100k
4.7
25V
0.1
1
22 6.3V
1
4.7
25V
2.2k
100p
5pF
1 1
1 1
15k 15k
4700p
680
22
6.3V
1000p
680k 680k
4700p
15k 15k
10k 15k
680
22
6.3V
1
4.7k
1k
0.01
0.047 0.047 0.047 0.22
0.47
100k
2.2
5k
1k
1k
3.3
50V
0
0.1
1000p
1000p
100k
0.47
1k
100p
680
1000p
4.7k
22
6.3V
10k
150k
1000
6.3V
1SS367
470
4V
220k
0.22
1000p
22
4V
0.1
1k
0.1
0.33
MA111
MA8130
4.7k
1000p
10k 0.47
15p
15p
10k
10k
10k
220k
0.047
XC62RP1602MR
100k
100k
0
100k
1k
10k
100k
4.7k
2SB970
RADIO
B+ SWITCH
100k
0.047
6.8k
6.8k
0
LB8115W-NB-TLM
100p
470
470p
0.47
470p 470p
10k
10k
10k
10k
2p
1000p
100p
0
1k
2SC4154
10k
2SB970
XN1501
75kHz
0.1
0.1
1M
100
(N/R SW)
(TAPE ON)
0
10k
3.3K 1k
10k
10k
330 330
XN1501-T X
AVLS
10k/10k
1
1
XN4215
4.7k
1K
0.1 B
1k
1k
1SS314
0
AM OSC
FM RF
2SC3931
LPF
SYSTEM
CONTROL
1 22
6.3V
47 0.01 1000p 1000p
0.1
2.2
30nH
* *
*
LCH
RCH
RCH
LCH
REV
FWD
MPRM
V12M
MUTE
AAGC
DETO
MPXI
PLT2
PLT1
PLL1
PLL2
TVRO
REGV
FTLO
FMBF
AMLO
FALC
PLLO
COMP
BAND
TUNE
FMIB
IFCT
NC
MREF
ARFI GND
FMRO
OLAG
DDCN PLLI STID MCNT GND VCC
FRONT-END,
IF,DET,FM MPX
VCO MPRG L OUT R OUT
FM IN
TV IN
W
V
U
CAPSTAN/REEL
MOTOR
COM
DRY BATTERY
SIZE "AA"
2PCS, 3V
(IEC DESIGNATION R6)
TEST 1
LPF GND
LPF OUT
LPF IN
E.O
VSS
AM IN
FM IN
VDD
TU VCC
RESET
DBR1
DBR2
DBR3
DBR4
X IN
COMP
SD
BAND
PB2 PB3 PA0 PA1 PA2
TEST2
PB1
X OUT
E/CA
AVLS
LOCAL/DX
NOR/METAL
N/R SW
BACK UP
AMP ON
BEEP
BATT CHECK
BATT REF
VSS
RADIO ON
MEGA BASS
MUTE
TAPE
PRE CTL
S13
S12 S11 S10 S9 S8 S7 S6 S5 S4 S3 S2 S1 COM4 COM3 COM2 COM1
HOLD
S15
S14
COM
RI
S/S
PRE GND
PRE OUT(L)
PRE NF(L)
PRE OUT(R)
PRE NF(R)
FWDIN(L)
REVIN(L)
FWDIN(R)
REVIN(R)
VREF R.REF SYSTEM POWER OUT(L) POWER GND POWER OUT(COM) VCC POWER OUT(R) POWER MUTE POWER IN(L) POWER IN(R) MIX OUT(L)
VSP
IN+
M VREF
M GND
L.B SW
DET OUT
MIX IN(L)
H.PIN(L)
MIX IN(R)
H.PIN(R)
MIX
OUT(R)
L.P.F
M VCC
OSC
UB VB
WB
DR
MPGND
FC
OUT
W OUT
V OUT U OUT
PRE AMP,
MEGA BASS,
HEADPHONE AMP,
MOTOR CONTROL
AM
ANTENNA
FERRITE ROD
L3
CHECK
BATTERY
VOLUME
HEAD
PLAYBACK
HP601
FM/AM
MOTOR CONTROL
PA3
TUNING
+ -
PRESET
OFF
ENTER FM
AM
PRESET-
SWITCH
MENU SET
LIQUID CRYSTAL DISPLAY
POWER
SWITCH
ON/OFF
POWER
5E,6E
5E,6E
ON
HOLD
OFF
-2
-1
SWITCH
TAPE SELECTOR
5E,6E
9E,CH
9E,CH
RV2
CT1,L3
5E,6E
*C10
5p
7p
9E,CH
5E,6E
9E,CH
*C18,19
0.022
5E,6E:LC72348W-CFX1721
9E,CH:LC72348W-CFX1726
0.015
FM VCO
AM IF
TRACKING
AM
AM
FREQUENCY
COVERAGE
FM
TRACKING
TAPE
SPEED
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
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