索尼SONY WM-FX481电路图
Ver 1.0 2001.04
WM-FX481
SERVICE MANUAL
RADIO CASSETTE PLAYER
SPECIFICATIONS
E Model
Chinese Model
Model Name Using Similar Mechanism
NEW
MD Mechanism Type
MF-WMFX481-114 (5E, 6E, 9E)
MF-WMFX467-114 (CH)
9-873-125-11
2001D0200-1
© 2001.4
Sony Corporation
Personal Audio Company
Shinagawa Tec Service Production Group
• Abbreviation
CH
: Chinese
9E
: No Indication of country of origin
5E, 6E : Indication of country of origin
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2
WM-FX481
Specifications ........................................................................... 1
1.
GENERAL ...................................................................... 2
2.
DISASSEMBLY
2-1. Cabinet (Front), Cabinet (Center) Sub ASSY ............ 3
2-2. Main Board ................................................................. 3
2-3. Mechanism Deck ........................................................ 4
2-4. Belt, Capstan/reel Motor (M601),
Magnetic Head (Playback) (HP601) ........................... 4
2-5. Cassette Holder ........................................................... 5
3.
ADJUSTMENTS
3-1. Mechanical Adjustments............................................. 6
3-2. Electrical Adjustments ................................................ 6
4.
DIAGRAMS
4-1. Explanation of IC Terminals....................................... 9
4-2. Block Diagram.......................................................... 10
4-3. Schematic Diagram....................................................11
4-4. Printed Wiring Boards – Main Section (Side A) – ... 12
4-5. Printed Wiring Boards – Main Section (Side B) – ... 13
5.
EXPLODED VIEWS
5-1. Cabinet Section ......................................................... 15
5-2. Mechanism Deck Section
(MF-WMFX467-114:CH)
(MF-WMFX281-114:5E, 6E, 9E)..... 16
6.
ELECTRICAL PARTS LIST ................................... 17
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270°C during
repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering or
unsoldering.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
TABLE OF CONTENTS
SECTION 1
GENERAL
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WM-FX481
SECTION 2
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
2-1. CABINET (FRONT), CABINET (CENTER) SUB ASSY
2-2. MAIN BOARD
z The equipment can be removed using the following procedure.
Main board
Cabinet (center) sub ASSY
Cassette holder
Mechanism deck
Belt, Capstan/reel motor (M601)
Magnetic head (playback) (HP601)
Set
Cabinet (front)
Note : Use the precision driver with coverd a point
by cloth to release the claw.
Be careful not to damage claws.
Cabinet (Front)
Cabinet (center) sub ASSY
Cassette holder
4 Claw
4 Claw
2
5
1 Claws
1 Claws
3 Claws
1 Claws
Main board
1 Screw
Orange
Black
White
Red
Cabinet (center) sub ASSY
Head flexible board
2 Remove solder
3 Claws
4
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WM-FX481
2-3. MECHANISM DECK
2-4. BELT, CAPSTAN/REEL MOTOR (M601), MAGNETIC HEAD (PLAYBACK) (HP601)
Mechanism deck
Cabinet (center) sub ASSY
1 Claws
2
wheel ASSY (P), capstan
wheel ASSY (P), capstan
Belt
• How to apply the belt
Capstan/reel motor
(M601)
2 Belt
Stopper
1 Claw
6 magnetic head
(PLAYBACK)
(HP601)
4 Capstan/reel motor
(M601)
3 Screws (M1.4)
5 Screws (M1.4)
Mechanism deck
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WM-FX481
1
Insert the spring (torsion) to the L shape slot as shown in the figure.
2,3 Insert the hinge of the “Cassette holder ”.
4
Close the “Cassette holder” then press it.
2-5. CASSETTE HOLDER
z CAUTIONS DURING ASSEMBLY
Cassette holder
4 Spring (torsion)
1
5
Hinge
Cabinet (center)
sub ASSY
Hinge
Projection
Projection
Hinge
Hinge
Projection
Projection
3 Move the hinge away
from projection
2 Move the hinge away
from projection
L shape slot
Spring (torsion)
Hinge
Hinge
Cassette holder
Cabinet (center) sub ASSY
1
2
4
3
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WM-FX481
3-1. MECHANICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab :
playback head
pinch roller
capstan
rubber belt
2. Demagnetize the playback head with a head demagnetizer.
Do not use a magnetized screwdriver for the adjustments.
3. These measurement and adjustment should be performed with
the rated power supply voltage (2.5 V) unless otherwise noted.
Torque Measurement
Mode
Torque meter
Meter reading
FWD
1.97 – 4.11 mN • m
20 – 42 g • cm
(0.28 – 0.58 oz• inch)
FWD
CQ-102C
less than 0.19 mN • m
less than 2 g • cm
back tension
(less than 0.027 oz• inch)
1.97 – 4.11 mN • m
REV
20 – 42 g • cm
(0.28 – 0.58 oz• inch)
REV
CQ-102RC
less than 0.19 mN • m
less than 2 g • cm
back tension
(less than 0.027 oz• inch)
FF, REW
CQ-201B
more than 5.89 mN • m
more than 60 g • cm
(more than 0.84 oz• inch)
SECTION 3
ADJUSTMENTS
3-2. ELECTRICAL ADJUSTMENTS
PRECAUTION
•
Supplied voltage : 2.5V.
•
Switch and control position (MENU display)
MEGA BASS : OFF
VOLUME control (RV301) : maximum
AVLS : OFF (No indicated)
FM MODE : 5E, 6E : DX (No indicated)
9E, CH : STEREO (No indicated)
•
Abbreviation
CH
: Chinese
9E
: No Indication of country of origin
5E, 6E: Indication of country of origin
TAPE SECTION
Test Tape
Type
Signal
Used for
WS-48A
3kHz, 0dB
Tape Speed Adjustment
Tape Speed Adjustment
Procedure :
1. Playback WS-48A (tape center part) in the FWD state and ad-
just RV601 so that the frequency counter reading becomes
3,000Hz.
Standard value : 2,985–3,015Hz
2. Playback WS-48A (tape center part) in the REV state.
Check that frequency counter reading is within ±1.0% of the
reading of step 1.
Adjustment Location :
0 dB = 0.775V
set
test tape
WS-48A
(3kHz, 0dB)
frequency counter
16 Ω
phones jack (J301)
RV601 : Tape speed Adjustment
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WM-FX481
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
620kHz <621kHz>
CT1
1,400kHz <1,395kHz>
FM FREQUENCY COVERAGE CONFIRMATION
Frequency display
Reading on digtal voltmeter
Confirmation
87.5MHz
Standard value : 6.5V or less
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L4
98MHz
Confirmation
108MHz
TUNER SECTION
AM Section
BAND : AM
FM Section
BAND : FM
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
RV2
1,000kHz <999kHz>
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust parts
Frequency display
Reading on digtal
voltmeter
Confirmation
530kHz
Standard value : 3V or less
L7
1,710kHz
Adjustment value : 10.0V<9.0V>
<1,602kHz>
Standard value : 9.9-10.1V
<8.9 – 9.1V>
Adjustment Location : Main board (See page 8)
0 dB = 1µV
•
Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
AM RF signal
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
Put the lead-wire
antenna close to
the set.
set
16 Ω
phones jack (J301)
level meter
Frequency Coverage Adjustment
Setting :
J301
i
9E,CH
5E,6E
JR3
C40
R207
FB301
FB201
FB101
C35
R21
D5
R2
C9
C16
PWOUT
PWOUT
(R)
(L)
STID
(COM)
PWOUT
GND
FM
IN
MAIN BOARD (SIDE B)
FM RF signal
generator
33.75kHz frequency
deviation by 1kHz signal.
Output level :
as low as possible
TP
(FM IN)
0.01µF
no mark : 10kHz step
< > : 9kHz step
D704
R709
C706
L402
C
C303
S709
ENTER
PB3
GND
VT
TUNER
VCC
S713
AM
TP (VT)
TP (GND)
digital voltmeter
(DC range)
MAIN BOARD (SIDE B)
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WM-FX481
Adjustment Location :
FM VCO Adjustment
Procedure :
1. Connect the level meter as shown in the figure.
2. Turn the set to 98MHz.
3. Adjust RV1 so that the wave form to be maximum.
Stereo opration shall be normal.
J301
i
9E,CH
5E,6E
JR3
C40
R207
FB301
FB201
FB101
C35
R21
D5
R2
C9
C16
PWOUT
PWOUT
(R)
(L)
STID
(COM)
PWOUT
GND
FM
IN
MAIN BOARD (SIDE B)
FM RF signal
generator
Carrier frequency : 98MHz
33.75kHz frequency deviation by 1kHz signal.
Modulation : L = -R
Output level : as low as possible
TP
(FM IN)
0.01µF
set
16 Ω
phones jack (J301)
level meter
IC1
[MAIN BOARD] (SIDE A)
RV1 : FM VCO Adjustment
L7 : AM Frequency Coverage Adjustment
RV2 : AM IF Adjustment
L4 : FM Tracking Adjustment
L3 : AM Tracking Adjustment
CT1 : AM Tracking Adjustment
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WM-FX481
SECTION 4
DIAGRAMS
Pin No.
Pin name
I/O
Descliption
1
XOUT
O
Crystal oscillator output (75kHz).
2
TEST2
–
Not used (Ground).
3
PA3
I
Key input.
4
PA2
I
Key input.
5
PA1
I
Key input.
6
PA0
I
Key input.
7
PB3
O
Key output.
8
PB2
O
Key output.
9
PB1
O
Key output.
10
AVLS
O
AVLS signal output.
11
MOTOR CTL
O
Motor control output.
12
METAL/NOR
O
METAL/NORMAL type tape and DX/LOCAL select signal output.
DX/LOCAL
13
E/CA
I
Destination select.
14
BAND
O
Tuner band select signal output.
15
SD
I
Tuning signal detect input.
16
COMP
I
Compalator input.
17
N/R SW
I
FWD/REV mode signal input.
18
BACK UP
I
Back up voltage input.
19
AMP ON
O
Power ON/OFF signal output.
20
BEEP
O
Beep signal output.
21
BATT CHECK
I
Back up cancel input.
22
BATT REF
I
A/D reference voltage input.
23
HOLD
I
HOLD switch input. “H” :ON, “L” :OFF
24
VSS
–
Ground terminal.
25
RADIO ON
O
Radio ON signal output.
26
MEGA BASS
O
MEGA BASS ON signal output.
27
MUTE
O
Mute ON signal output.
28
TAPE
I
Tape ON input.
29
PRE CTL
O
Preamplifier control output.
30-44
S1-15
O
LCD segment output.
45-48
COM1-4
O
LCD common output.
49-52
DBR1-4
–
LCD power supply.
53
RESET
I
Reset input (Fixed “H”).
54
TU VCC
–
Power supply.
55
VDD
–
Power supply.
56
FM IN
I
FM osc frequency input.
57
AM IN
I
AM osc frequency input.
58
VSS
–
Ground terminal.
59
E.O
O
Error (PWM) signal output.
60
LPF IN
I
LPF input.
61
LPF OUT
O
LPF output.
62
LPF GND
–
Ground terminal.
63
TEST 1
–
Not used (Ground).
64
X IN
I
Crystal oscillator input (75kHz).
4-1. EXPLANATION OF IC TERMINALS
IC702
LC72348W-CFX1721(5E, 6E) SYSTEM CONTROL
IC702
LC72348W-CFX1726(9E, CH) SYSTEM CONTROL
• Abbreviation
CH
: Chinese
9E
: No Indication of country of origin
5E, 6E : Indication of country of origin
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
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9
4
2
9
8
T E L
1 3 9 4 2 2 9 6 5 1 3
9
9
2
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9
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1
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10
WM-FX481
4-2. BLOCK DIAGRAMS
• Abbreviation
CH
: Chinese
9E
: No Indication of country of origin
5E, 6E : Indication of country of origin
RV1
D2
L4
CT1
L7
L6
D4
D1
X701
HP601
M601
J301
D703
S701
S301
S302
RV301
RV2
D404
RV601
D704
75kHz
(TAPE ON)
(N/R SW)
FM/AM/TV
FRONT-END,
IF,DET,FM MPX
REGV
FTLO
AMLO
COMP
BAND
TUNE
IFCT
MREF
ARFI
FMRO
VCC
VCO
MPRG
FM VCO
FM TRACKING
AM
ANTENNA
FERRITE ROD
L3
AM TRACKING
COVERAGE
AM FREQUENCY
RV2
AM IF
COMP
SD
BAND
RADIO B+
SWITCH
Q701
RADIO ON
MEGA BASS
MUTE
PRE CTL
MOTOR CTL
AMP ON
VDD
HOLD
BATT REF
BEEP
BATT CHECK
TAPE
N/R SW
DRY BATTERY
SIZE "AA"
2PCS, 3V
(IEC DESIGNATION R6)
COM1-4
PA0-3
PB1-3
LIQUID CRYSTAL
DISPLAY PANEL
CONTROL KEY
S/S
SYSTEM
POWER
POWER
SWITCH
Q501
ON/OFF
Q502
CHECK
BATTERY
IC701
ON
OFF
HOLD
AM IN
LPF OUT
LPF IN
E.O
FM IN
TAPE SELECTOR
SWITCH
Q301
R-CH
LCH
RCH
RCH
LCH
REV
FWD
HEAD
PLAYBACK
VREF
W
V
U
CAPSTAN/REEL
MOTOR
COM
M VCC
IN+
TAPE
SPEED
VOLUME
POWER IN(L)
POWER OUT(R)
POWER OUT(L)
POWER OUT(COM)
R-CH
MIX IN(L)
PRE OUT(L)
PRE NF(L)
SYSTEM
CONTROL
IC702
PRE AMP,
MEGA BASS,
HEADPHONE AMP,
MOTOR CONTROL
IC301
IC1
L4
L7
R-CH IS OMITTED:SAME AS L-CH
VREF
VREF
L3,CT1
MIX OUT(L)
R-CH
H.P IN(L)
REV IN(L)
REV IN(R)
FWD IN(R)
FWD IN(L)
X IN
L OUT
R OUT
W OUT
V OUT
U OUT
X OUT
SWITCH
D5
FM IN
TV IN
PLT2
PLT1
BUFFER
Q3
SWITCH
LOCAL/DX
NOR/METAL
VSS
VSS
PRE GND
Q4
M VREF
AVLS
SWITCH
Q200
E/CA
AVLS
R-CH
6-3
9-7
S712,713
S709,710
S702-707
S1-15
44-30
48-45
LCD701
PW MUTE
LB SW
9E,CH
5E,6E
5E,6E
5E,6E
• Signal path.
F
: FM
f
: AM
E
: PB
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
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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
220µH
R717
R709
L702
S701
S302
S301
R107
FB301
0µH
FB101
0µH
0µH
FB201
R607
TH601
R606
R108
R208
R205
R105
Q200
RV301
C207
C107
Q301
RV1
JC1
C4
R2
R21
D5
JR3
L7
L4
L1
0.1µH
0.1µH
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
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9
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8
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4
2
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8
T E L
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9
2
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9
4
2
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5
1
5
1
3
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3
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Q
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12
12
WM-FX481
MAIN BOARD (SIDE A)
11
(11)
1-680-404-
S301
(TAPE ON)
2
3
4
5
6
7
8
9
10
A
1
B
C
D
E
F
C307
IC702
S302
(N/R SW)
Q502
R106
Q3
R101
JC1
R702
R503
R502
R605
R607
R606
R206
C202
R708
R13
R721
C601
R603
R103
R102
R104
R304
C602
R604
R720
R706
1
2
3
C721
R203
Q701
Q501
R718
D2
D4
C7
C704
TH601
X701
C702
R15
R14
R10
L6
R12
R5
R4
R107
9E,CH
R3
R17
R504
R305
R704
R204
R701
C711
C23
R301
C3
C15
C28
C22
C34
C21
R731
C25
C33
C19
C18
R716
C6
C26
C5
C14
C11
C302
C13
C709
C707
C705
C714
C306
C703
C106
C208
C606
R9
C206
C108
R707
C105
C201
C304
C708
C103
C101
C205
C102
C203
R602
R601
C603
C604
C605
R302
R710
C32
C10
C4
R712
R501
R714
L702
R713
R711
R6
R303
C710
R20
C31
C301
C701
C309
R201
R722
C501
C20
R703
Q301
R202
C607
IC1
CT1
RV1
C75
R715
R22
L1
L2
R717
C74
IC701
RV2
JC5
R7
C8
IC301
R8
R40
Q4
5E,6E
FB302
37
36
48
1
12
13
25
24
40
31
30
21
20
11
1
10
5E,6E
D2
C-9
D4
D-8
IC1
C-8
IC301
E-4
IC701
E-6
IC702
D-5
Q3
D-8
Q4
F-6
Q301
E-5
Q501
C-3
Q502
B-3
Q701
B-4
4-4. PRINTED WIRING BOARDS – MAIN SECTION (SIDE A) –
Note:
• X : parts extracted from the component side.
•
a
: Through hole.
•
f
: internal component.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
• Abbreviation
CH
: Chinese
9E
: No Indication of country of origin
5E, 6E : Indication of country of origin
Ref. No.
Location
z Semiconductor
Location
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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13
13
WM-FX481
J301
i
ORG
BLK
WHT
RED
W
V
U
COM
M
M601
CAPSTAN/REEL
MOTOR
S701
HOLD
ON
OFF
HEAD FLEXIBLE
BOARD
9E,CH
5E,6E
2
3
4
5
6
7
8
9
10
A
1
B
C
D
E
F
G
H
L3
FERRITE-ROD
ANTENNA
DRY BATTERY
SIZE "AA"
(IEC DESIGNATION R6)
2PCS, 3V
C39
C36
D704
R709
R18
JR3
C40
R200
R207
R404
C107
C24
R105
D1
FB301
FB201
FB101
R11
C35
R21
R108
C207
C706
D703
Q200
R208
L402
D404
C73
C72
D5
C311
R2
C111
C211
R205
C29
L4
L7
C502
C305
C308
C9
C12
C17
C303
C16
C204
C712
RV301
C104
C30
C503
S709
ENTER
S704
RADIO OFF
PB3
(R)
PW
GND
(L)
MEGA
MIX IN
MIX IN
GND
+B
TAPE
+B
PRE
GND
FWD
(L)
VREF
S701
REV
(R)
REV
(L)
FWD
(R)
PA1
BASS
VCC
C312
PB1
TUNE
COMP
PRE
CTL
TUNER
GND
(R)
PA2
PWIN
(L)
MIX OUT
PWIN
(R)
VREF
(L)
MIX OUT
PWOUT
PWOUT
(R)
(L)
STID
(COM)
PWOUT
GND
GND
VT
PA3
TUNER
VCC
AMP
ON
PA0
PB2
VDD
MUTE
+B
FM
IN
S707
SET
S710
MENU
RV301
VOLUME
w
L-CH
R-CH
R-CH
L-CH
FWD
REV
HP601
PLAYBACK
HEAD
LCD701
LIQUID CRYSTAL
DISPLAY PANEL
RV601
(TAPE SPEED)
MAIN BOARD (SIDE B)
11
(11)
1-680-404-
S713
AM
S702
TUNING+
S705
TUNING–
S706
PRESET–
S703
PRESET+
S712
FM
4-5. PRINTED WIRING BOARDS – MAIN SECTION (SIDE B) –
Note:
• X : parts extracted from the component side.
•
a
: Through hole.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
• Abbreviation
CH
: Chinese
9E
: No Indication of country of origin
5E, 6E : Indication of country of origin
Ref. No.
Location
z Semiconductor
Location
D1
F-2
D5
C-2
D404
C-6
D703
B-10
D704
C-7
Q200
E-4
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
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14
14
WM-FX481
1
2
36
35
34
33
32
31
30
29
28
27
26
25
13
14
15 16
17
18
19
20 21 22
23 24
48 47 46 45 44 43
42
41
40
39
38
37
COM
RI
VREF
POWER OUT
(COM)
POWER OUT (R)
VCC
POWER MUTE
POWER IN (L)
POWER IN (R)
MIX OUT (L)
MIX OUT (R)
LP.2
HP IN (R)
HP IN (L)
DET OUT
MVREF
IN+
VSP
MIX IN (R)
MIX IN (L)
LOW BOOST SW
M-GND
R.VREF
SYSTEM
POWER OUT (L)
POWER GND
MVCC
DR
WOUT
MP-GND
VOUT
UOUT
FC
OUT
OSC
UB
VB
WB
3
4
5
6
7
8
9
10
11
12
PRE NF (L)
PRE OUT (R)
PRE NF (R)
FWD IN (R)
REV IN (R)
REV IN (L)
FWD IN (L)
S/S
PRE GND
PRE OUT (L)
BIAS
R.F
REF
SYS
CONT
DET
VREF
SPEED
LOW
BOOST
PRE DRIVER
OPERATION LOGIC
OSC
PLUSE DET
REF
VOLTAGE
REF VOLTAGE
FOR SPEED CONTROL
CURRENT
DET
OPERATION
DET
FWD/
REV
FREQ
CARC.
+
–
Note on Schematic Diagram: MAIN SECTION
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and 1/4 W or less unless otherwise
specified.
•
f
: internal component.
• C : panel designation.
•
: B+ Line.
• H : adjustment for repair.
• Power voltage is dc 3V and fed with regulated dc power
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
• no mark : FM
(
) : AM
<
> : PLAY(TAPE)
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Signal path.
F
: FM
f
: AM
E
: PB
• Abbreviation
CH
: Chinese
9E
: No Indication of country of origin
5E, 6E : Indication of country of origin
z Waveforms
1
IC702 1
VOLT/DIV : 500 mV AC
TIME/DIV : 5 µsec
XOUT
1.5 Vp-p
13.5 µsec
• IC BLOCK DIAGRAMS
IC1 CXA1960Q
IC301 LB8115W-NA-TLM
+
–
12
13
14
19
15
TVIN
MREF
GND
FMIB
IFCT
NC
FMIN
FMRO
OLAG
ARFI
REGV
TVRO
FTLO
BAND
TUNE
PLLO
FALC
COMP
37
38
39
40
AAGC
DETO
PLT2
MPXI
MPRM
V12M
MUTE
PLT1
PLL1
PLL2
MPX DECODER
AM BPF
PSN
1/X
FM/TV
LPF
PD
VCO
1/2
1/2
STID
14V
PLAP
TUNE
38kHz
STEREO AUDIO R
STEREO AUDIO L
19kHz
1.65V
1.25V
36
8
9
10
VCO
STID
MCNT
GND
VCC
1
4
2
3
5
6
MPRG
LOUT
ROUT
DDCN
PLLI
7
+
–
+
–
35
34
FM DET
150kHz
FM LMT
OL DET
TV RF
AMP
FM RF
AMP
AM RF
AMP
45kHz
31
32
33
MUTE
AGC AMP
AM AGC
1.25V
AM/FM: 1/2
TV: 1/8
1.25V
18
17
16
FMBF
AMLO
AM OSC
FM/TV OSC
20
30
29
27
28
23
24
25
26
22 21
11
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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WM-FX481
15
SECTION 5
EXPLODED VIEWS
NOTE :
• -XX, -X mean standardized parts, so they
may have some difference from the original
one.
• Items marked “ * ”are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering
these items.
• The mechanical parts with no reference
number in the exploded views are not
supplied.
• Hardware (# mark) list and accessories and packing
materials are given in the last of this parts list.
• Abbreviation
CH
:Chinese
9E
:No Indication of country of origin
5E, 6E :Indication of country of origin
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
5-1. CABINET SECTION
L3
LCD701
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
17
21
18
19
20
22
1
3-226-667-11 CABINET (FRONT)
2
3-226-861-01 WINDOW (2) (LCD)
3
3-044-869-01 KNOB (HOLD)
4
3-227-268-01 BUTTON (PRESET)
5
3-015-285-01 SCREW (M1.4),TOOTHED LOCK (WH)
* 6
A-3021-379-A MAIN BOARD,COMPLETE (9E,CH)
* 6
A-3021-418-A MAIN BOARD,COMPLETE (5E,6E)
7
3-044-865-01 STOPPER
8
3-007-006-21 BUTTON (STOP)
9
3-007-004-21 BUTTON (FF)
10
3-030-054-01 BUTTON (PLAY)
11
3-007-005-21 BUTTON (REW)
12
3-228-508-31 CASSETTE, HOLDER
13
3-007-012-01 SPRING (TORSION)
14
X-3380-184-1 CABINET (CENTER) SUB ASSY(5E,6E,CH)
14
X-3380-185-1 CABINET (CENTER) SUB ASSY (9E)
15
3-007-011-01 SPRING (CASSETTE)
17
3-030-055-01 TERMINAL (+), BATTERY
18
3-007-010-01 TERMINAL (-), BATTERY
19
3-226-672-01 RUBBER, CONDUCTIVE
20
3-226-671-01 HOLDER (LCD)
21
3-030-062-21 LID, BATTERY
22
3-231-437-01 RUBBER, HARD
L3
1-754-124-21 ANTENNA, FERRITE-ROD (AM TRCKING)
LCD701 1-804-256-21 LIQUID CRYSTAL DISPLAY
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9
2
8
9
4
2
9
8
TEL 13942296513
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
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16
WM-FX481
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
HP601
M601
not
supplied
101
103
103
104
105
105
106
107
106
109
110
125
112
113
114
115
116
117
118
119
120
121
122
123
124
108
126
111
not
supplied
not
supplied
not supplied
not
supplied
not
supplied
not
supplied
5-2. MECHANISM DECK SECTION
MF-WMFX467-114 : CH
MF-WMFX281-114 : 5E, 6E, 9E
( )
101
X-3369-749-1 PINCH LEVER (N) ASSY
103
X-3372-619-1 WHEEL ASSY (NP), CAPSTAN
104
3-704-197-71 SCREW (M1.4)
105
3-024-223-01 GEAR (REEL-2)
106
3-921-797-01 WASHER
107
3-920-993-01 SPRING (NR)
108
3-933-324-01 SPRING (FR LEVER)
109
3-938-657-01 BELT
110
3-015-436-01 SPRING (STOP)
111
3-013-142-01 SPRING (FR-CP)
112
3-921-053-01 LEVER, D SELECTION
113
X-3376-169-1 CLUTCH ASSY
114
3-920-990-21 SPRING (UD), COMPRESSION
115
3-921-335-01 WASHER, LEVER
116
3-923-530-11 SLEEVE (M)
117
3-728-091-01 WASHER, STOPPER
118
3-921-052-11 LEVER (A), DETECTION
119
3-920-994-11 SPRING (D SELECTION)
120
3-929-419-01 LEVER (BR), DETECTION
121
3-704-197-01 SCREW (M1.4), SPECIAL HEAD
122
3-921-023-01 LEVER, M SELECTION
123
X-3369-748-1 PINCH LEVER (R) ASSY
124
3-920-997-01 SPRING (PINCH R)
125
3-016-989-01 SPRING (SW-CP)
126
X-3372-960-1 CHASSIS COMP ASSY (GL-L)
HP601
1-500-648-11 HEAD, MAGNETIC (PLAYBACK)(5E,6E,9E)
HP601
1-500-648-12 HEAD, MAGNETIC (PLAYBACK)(CH)
M601
1-763-073-11 MOTOR (CAPSTAN/REEL) (INCLUDING PULLY)
(CH)
M601
1-763-683-11 MOTOR (CAPSTAN/REEL) (INCLUDING PULLY)
(5E,6E,9E)
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QQ 376315150
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9
2
8
9
4
2
9
8
TEL 13942296513
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
http://www.xiaoyu163.com
17
WM-FX481
SECTION 6
ELECTRICAL PARTS LIST
MAIN
NOTE :
• Due to standardization, replacements in the
parts list may be different from the parts
specified in the diagrams or the components
used on the set.
• -XX, -X mean standardized parts, so they
may have some difference from the original
one.
• RESISTORS
All resistors are in ohms
METAL : Metal-film resistor
METAL OXIDE :Metal oxide-film resistor
F : nonflammable
• Items marked “ * ”are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering
these items.
• SEMICONDUCTORS
In each case, u : µ , for example :
uA.... : µ A.... , uPA.... : µ PA....
uPB.... : µ PB.... , uPC.... : µ PC....
uPD.... : µ PD....
• CAPACITORS
uF : µ F
• COILS
uH : µ H
When indicating parts by reference num-
ber, please include the board.
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
• Abbreviation
CH
:Chinese
9E
:No Indication of country of origin
5E, 6E :Indication of country of origin
*
A-3021-418-A MAIN BOARD, COMPLETE
(5E,6E)
*
A-3021-379-A MAIN BOARD, COMPLETE
(9E,CH)
********************
3-007-010-01 TERMINAL (-), BATTERY
3-030-055-01 TERMINAL (+), BATTERY
3-231-437-01 RUBBER, HARD
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