索尼SONY WM-FX491ST电路图
Ver 1.0 2000.01
MICROFILM
WM-FX491/FX491ST/FX493/FX493ST
RADIO CASSETTE PLAYER
SPECIFICATIONS
US Model
WM-FX493/FX493ST
Canadian Model
WM-FX491/FX491ST/FX493ST
AEP Model
E Model
Chinese Model
WM-FX491/FX493
Model Name Using Similar Mechanism
WM-FX477
Tape Transport Mechanism Type
MT-WMEX404-147
Photo : WM-FX493
SERVICE MANUAL
• Frequency range
FM: 87.5–108 MHz
AM: 530–1710 kHz (US, Canadian, 5E, 6E model)
531–1602 kHz (EXCEPT US, Canadian, 5E, 6E model)
• Power requirements
3 V DC batteries R6 (size AA) x 2
• Dimensions (w/h/d)
Approx. 115.8 x 83.2 x 30.1 mm, incl. projecting parts and
controls
• Mass
Approx. 115 g/Approx. 195 g (incl. a battery and a cassette)
• Supplied accessories
Stereo headphones or earphones with remote control (1)
(FX493/FX493ST)/Stereo headphones or earphones (1)
(FX491/FX491ST)
Design and specifications are subject to change without
notice.
• Abbreviation
5E, 6E : South America
Battery life (approximate hours)
(EIAJ*)
Sony alkaline LR6 (SG)
Sony R6P (SR)
Tape playback
25
7.5
Radio reception
40
14
* Measured value by the standard of EIAJ (Electronic
Industries Association of Japan). (Using a Sony HF series
cassette tape)
Note
• The battery life may shorten depending on the operation of
the unit.
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– 2 –
Specifications ........................................................................... 1
1.
GENERAL
Location and Function of Controls .................................... 3
2.
DISASSEMBLY
2-1. Cabinet (Front) Sub ASSY ......................................... 5
2-2. Main Board ................................................................. 5
2-3. Mechanism Deck ........................................................ 6
2-4. Belt, Motor (Capstan/Reel) (M901) ........................... 6
2-5. “Holder Sub ASSY, Cassette” .................................... 7
3.
ADJUSTMENTS
3-1. Mechanical Adjustments............................................. 8
3-2. Electrical Adjustments ................................................ 8
4.
DIAGRAMS
4-1. Explanation of IC Terminals......................................11
4-2. Block Diagram.......................................................... 13
4-3. Printed Wiring Boards .............................................. 15
4-4. Schematic Diagram................................................... 19
5.
EXPLODED VIEWS
5-1. Cabinet Section ......................................................... 23
5-2. Mechanism Deck Section (MT-WMEX404-147) .... 24
6.
ELECTRICAL PARTS LIST ................................... 25
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
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SECTION 1
GENERAL
LOCATION AND FUNCTION OF CONTROLS
This section is extracted from
instruction manual.
A
HOLDB
TUNING
BAND
RADIO ON
PRESET
REW
x
Y
FF
PRESET
RADIO OFF
MB MODE TAPE AVLS
FM MODE
B
FWD
REV
OPEN
MENU
SET
ENTER
Plug in firmly.
Branchez fermement.
FX493
FX491
VOL
FF/PRESET+
TUNING+/–
x/RADIO OFF
REW/PRESET–
RADIO ON /BAND
VOL
Y
Y•x (RADIO
ON/BAND•OFF)
HOLD
FF/PRESET +
C
FX493
FX491
MENU
MENU
SET
SET
FX493
REW/PRESET –
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Listening to the Radio B
1 If the HOLD function is turned on, slide the
HOLD switch in the opposite direction of
the arrow to unlock the controls.
2 Press RADIO ON/BAND to turn on the
radio.
3 Press RADIO ON/BAND repeatedly to
select AM, FM1, FM2 or FM3.
4 Press TUNING +/– to tune in to the desired
station.
If you keep pressing TUNING+/– for
a few seconds, the Walkman will start
tuning to the stations automatically.
To turn off the radio
Press x•RADIO OFF.
To improve the broadcast reception C
• For FM: Extend the headphones/earphones cord
(antenna) (FX491) or remote control cord (antenna)
(FX493). If the reception is still not good, press
MENU repeatedly to set the cursor to FM MODE in
the display.
• For AM: Reorient the unit itself.
Presetting Radio Stations
You can store radio stations into the unit’s memory.
You can preset up to 32 radio stations, 8 for each
FM1, FM2, FM3 or AM bands.
1 Press RADIO ON/BAND to turn on the
radio.
2 Press RADIO ON/BAND repeatedly to
select AM, FM1, FM2 or FM3.
3 Press ENTER.
The frequency digits and a preset number
flash in the display.
4 While the frequency digits and the preset
number are flashing, tune in to a station you
wish to store using TUNING+/–, and select
a preset number using PRESET+/–.
5 While the frequency digits and the preset
number are flashing, press ENTER.
Notes
•If you cannot complete step 4 or 5 while the indications
are flashing, repeat from step 3.
•If a station is already stored, the new station replaces
the old one.
To cancel the stored station
Follow the procedure above and in step 3, instead of
tuning in to a station, press and hold TUNING +/– until
“- - - -” is displayed. Press ENTER while “- - - -” is
flashing.
To play the preset radio stations
1 Press RADIO ON/BAND to select the band.
2 Press PRESET+/–.
To operate from the remote control
(FX493 only)
To turn on the radio, press RADIO ON/BAND•OFF
for more than one second (only while the tape is in
stop mode).
To select the band, press RADIO ON/BAND•OFF
for more than one second while the radio is on.
To tune in or recall a preset station, press PRESET +
or –.
To turn off the radio, press RADIO ON/BAND•OFF.
Using Other Functions
To lock the controls
Set the HOLD switch to the direction of the arrow to
lock the controls.
Preparations
To Insert Batteries A
1 Slide and open the battery compartment lid,
and insert two R6 (size AA) dry batteries
with correct polarity.
Replace the batteries with new ones when " e "
flashes in the display.
Playing a Tape B
1 If the HOLD function is turned on, slide the
HOLD switch in the opposite direction of
the arrow to unlock the controls.
2 Insert a cassette and press MENU
repeatedly to set the cursor to TAPE in the
display. Then press SET to select the tape
type.
No message: normal (TYPE I)
METAL: CrO2 (TYPE II) or metal (TYPE IV)
3 Press Y on the main unit, or if using the
remote control (FX493 only), press Y
(play)•x (stop).
Adjust the volume with VOL.
When adjusting the volume on the Walkman (FX493
only)
Set the VOL control on the remote control at maximum.
When adjusting the volume on the remote control
(FX493 only)
Set the VOL control on the Walkman slightly above the
appropriate level.
Note on the cassette holder
When opening the cassette holder, press the x (stop)
button and make sure the tape is stopped by checking
through the cassette window, then slide the OPEN
switch.
If the cassette holder is opened before the tape is
stopped, the tape may loosen and be damaged.
Operation on the main unit
To
Switch playback to
the other side
Stop playback
Operation on the remote control (FX493
only)
To
Switch playback to
the other side
Stop playback
Other tape operations
To
Fast forward*
Rewind*
Play the same side from
the beginning (Auto
Play function)
Play the other side from
the beginning (Skip
Reverse function)
* For FX493 only: If Y•x on the remote control is
pressed during fast forward or rewind, the Walkman
switches to playback.
To select playback mode
Press MENU repeatedly to set the cursor to MODE in
the display.
Then press SET to select the desired mode.
To play
Both sides repeatedly
Both sides once from
the side facing the
cassette holder
Press
Y•x for 2 seconds or
more during playback
Y•x once during
playback
Press
Y (play)during playback
x
Select
s
d
Press
FF during stop
REW during stop
REW during playback
FF during playback
To emphasize bass sound
Press MENU repeatedly to set the cursor to MB in the
display. Then, press SET to turn MB on. With each
press, the indications change as follows.
MB (MEGA BASS) : emphasizes bass sound
No message: off (normal)
Notes
• If the sound is distorted with the mode “MB”, turn
down the volume of the main unit or select normal
mode.
• Bass emphasis may not show great effect if the volume
is turned up too high.
To protect your hearing—AVLS
(Automatic Volume Limiter System)
function
When you set the AVLS function to active, the
maximum volume is kept down to protect your ears.
Press MENU repeatedly to set the cursor to AVLS in
the display. Then press SET to show “
”.
Note
• The AVLS setting will be canceled when you replace
the batteries.
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SECTION 2
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
2-1. CABINET (FRONT) SUB ASSY
2-2. MAIN BOARD
z The equipment can be removed using the following procedure.
Main board
Cabinet (Front) sub ASSY
Holder sub ASSY, Cassette
Mechanism deck
Belt, Motor (Capstan/reel) (M901)
Set
Cabinet (Front) sub ASSY
4 Screws (B1.7x12)
Lid, Battery case
Center cabinet
2 OPEN
6 Claws
3
7
1
6 Claws
5 Claws
6 Claws
Main board
3 Screw
Black
Orange
White
Red
Switch (S601)
Head flexible board
5
2
1 Remove solder
Center cabinet
4 Claws
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2-3. MECHANISM DECK
2-4. BELT, MOTOR (CAPSTAN/REEL) (M901)
Mechanism deck
Center cabinet
2
1 Claws
1 belt
3 Motor (Capstan/reel) (M901)
wheel assy (SP), capstan
belt
• How to apply the belt
M901
2 Screws (M1.4)
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– 7 –
Holder sub ASSY, Cassette
Center cabinet
1 OPEN
5 Spring (lid up)
Hinge
Hinge
Hinge
2
4
4
Projection
Projection
Hinge
3 Move hinge away
from projection
3 Move hinge away
from projection
Holder sub ASSY, Cassette
Center cabinet
5 Spring (Lid up)
Hinge
4
1
3
2
Hinge
1 Insert the spring (Lid up) to the slot as shown in the figure.
2 3 Insert the hinge of the “Holder sub ASSY, Cassette”.
4 Close the “Holder sub ASSY, Cassette” then press it.
2-5. “HOLDER SUB ASSY, CASSETTE”
z CAUTIONS DURING ASSEMBLY
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– 8 –
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
20 – 42 g • cm
CQ-102C
(0.28 – 0.58 oz• inch)
FWD
less than 2 g • cm
back tension
(less than 0.027 oz• inch)
REV
20 – 42 g • cm
CQ-102RC
(0.28 – 0.58 oz• inch)
REV
less than 2 g • cm
back tension
(less than 0.027 oz• inch)
FF, REW
CQ-201B
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
MEGA BASS : OFF
VOLUME control : maximum
AVLS : NORM
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
32 Ω
phones jack (J301)
RV601
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– 9 –
TUNER SECTION
AM Section
BAND : AM
FM Section
BAND : FM
< > : US, Canadian, 5E, 6E model
[ ] : Saudi Arabia model
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
450kHz
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust parts
Frequency display
Reading on digtal
voltmeter
L4
531kHz < 530kHz>
Adjustment value : 1.7V
Standard value : 1.6-1.8V
Confirmation
1,710kHz
Standard value : 8.8V
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L2
621kHz
< 620kHz>
CT1
1,395kHz
< 1,400kHz>
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust parts
Frequency display
Reading on digtal
voltmeter
Confirmation
87.5MHz
Standard value : 4.3V
L3
108MHz
Adjustment value : 8.0V
Standard value : 7.9-8.1V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1
87.5MHz
[87.35MHz]
Confirmation
108MHz
[108.25MHz]
• Abbreviation
5E, 6E : South America
Adjustment Location : Main board (See page 10)
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.
R22
R21
C32
R8
C33
R19
R10
R5
1
24
C10
C11
S702
ENTER
C31
C6
C7
R7
BT2
TP21
TP2
C9
C30
C35
Q2
C34
FB301
FB312
FB313
FB201
R
L
G
C38
D3
D
C14
FB311
FB101
TP744
FB2
TP1
MODEL
(G
TP8
L4
L3
CF1
L1
US,CND,5E,6E
FL1
TP844
TP204
T1
TP26
FM RF signal
generator
22.5kHz frequency deviation
by 400Hz signal.
Output level :
as low as possible
TP26
0.01µF
[MAIN BOARD]
(Side B)
set
32 Ω
phones jack (J301)
level meter
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– 10 –
Adjustment Location :
Frequency Coverage Adjustment
Setting :
R609
C17
R21
C32
C22
29
R3
R4
R6
R8
R10
R5
IC1
1
5
10
12
13
15
20
24
R12
R16
C16
C21
3
C20
R9
C5
C10
C11
C4
C13
S702
ENTER
C31
S707
FF +
C12
C6
8
C207
C7
R208
S714
S712
22
20
TUNING +
R608
R724
R606
R7
TP129
RV601
TP730
TP759
TP770
TP781
(VT)
TP21
TP736
TP739
TP740
TP2
C7
Q603
C9
C30
C35
C25
L70
C38
D3
D2
R708
C14
TP708
R723
R702
R703
TP745
FB2
C41
TP735
JC109
JC11
R722
TP731
TP734
TP725
TP764
(GND)
TP809
L4
L3
CF
6E
TP844
TP204
S705
SET
Y
TP781 (VT)
TP809 (GND)
[MAIN BOARD]
(Side B)
digital voltmeter
(DC range)
[MAIN BOARD] (SIDE A)
L4 : AM Frequency Coverage Adjustment
L3 : FM Frequency Coverage Adjustment
T1 : AM IF Adjustment
L1 : FM Tracking Adjustment
L2 : AM Tracking Adjustment
CT1 : AM Tracking Adjustment
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– 11 –
– 12 –
– 14 –
– 13 –
4-2. BLOCK DIAGRAM
• Signal path.
F
: FM
f
: AM
E
: PB
• Abbreviation
CND
: Canadian
EA
: Saudi Arabia
CH
: Chinese
9E
: Indication of country of origin
5E, 6E: South America
SECTION 4
DIAGRAMS
4-1. EXPLANATION OF IC TERMINALS
IC701 TC9327AF-621 (SYSTEM CONTROL/LCD DRIVE)
Pin No.
Pin Name
I/O
Pin Description
1– 4
COM1 – 4
O
LCD driver common output.
5 – 22
S1 – 18
O
LCD driver output.
23
MOTOR DIR
O
Motor rotation direction control output (FWD: L, REV: H).
24
MOTOR CTL
O
Motor ON/OFF control output (OFF: L, ON: H).
25
MOTOR SPEED
O
Motor speed control output (Normally: L, Speed down: H).
26
MOTOR BRK
O
Motor brake control output (Brake OFF: L, Brake ON: H).
27
PHOTO CTL
O
Photo reflector rotation detection control output.
28
DOLBY
—
Not used (OPEN).
29
NC
—
Not used (OPEN).
30
AVLS
O
AVLS control output (AVLS OFF: L, AVLS IN: H).
31
FM MODE
O
LOCAL/DX control output (DX: L, LOCAL: H) (US, CND, 5E, 6E only).
32
TAPE SELECT
O
Tape select control output (Normal: L, CrO2/METAL: H).
33
PHOTO IN
I
Photo reflector rotation detection input.
34 – 37
K0 – 3
I
Key input 0 – 3.
38
NC
—
Not used (OPEN).
39 – 41
KO1 – 3
I
Key input 1 – 3.
42
BATT DET
I
Power supply voltage detection input (A/D input).
43
HOLD
I
HOLD input.
44
RM KEY IN
I
Remote control key input.
45
AD REF
I
Reference voltage of pin 43 and 44.
46
CS
O
Chip select output for EEPROM.
47
DATA
O
Data output for EEPROM.
48
SCLK
O
SCLK output for EEPROM.
49
BEEP
O
BEEP output.
50
TEST
I
Test mode select terminal (Connect to remote contorol).
51
MEGA BASS
O
MEGA BASS control output (ON: L, OFF: H).
52
MUTE
O
Mute signal output (OFF: L, ON: H)
53
AMP CTL
O
Power AMP ON/OFF control output.
54
OPEN
I
OPEN switch input.
55
REV SW
I
Mechanism deck mode detection switch input (REV ON: H).
56
REW SW
I
Mechanism deck mode detection switch input (REW ON: H).
57
FF SW
I
Mechanism deck mode detection switch input (FF ON: H).
58
FWD SW
I
Mechanism deck mode detection switch input (FWD ON: H).
59
BAND
O
BAND select output (AM: L, FM: input).
60
RADIO ON
O
RADIO ON/OFF control output (OFF: L, ON: H).
61
IF REQ
O
IF request output (Auto scan: L, Normally: H).
62
NC
—
Not used (OPEN).
63
TEST/NC
—
Not used (OPEN).
64
IF IN
I
IF input.
65
PRE AMP CTL
O
Preamp mute signal output.
66
D02
O
VT control signal output.
67
HOLD
—
Fixed at “H” in this set.
68
NC
—
Not used (OPEN).
69
GND
—
Ground.
70
VCO FM
I
VCO (FM) input.
Pin No.
Pin Name
I/O
Pin Description
71
VCO AM
I
VCO (AM) input.
72
VDD
—
Power supply pin.
73
RESET
I
Reset input. Connect to VDD.
74
XOUT
O
Crystal oscillator output (75 kHz).
75
XIN
I
Crystal oscillator input (75 kHz).
76
VXT
—
Stabilized capacitor connection of crystal oscillation power supply.
77
VLCD
—
LCD driver power rising pressure pin.
78, 79
C1, 2
—
LCD driver power rising pressure pin.
80
VEE
—
1.5 V constant voltage power supply for LCD driver.
WM-FX491/FX491ST/FX493/FX493ST
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
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
– 17 –
– 18 –
– 15 –
– 16 –
WM-FX491/FX491ST/FX493/FX493ST
Note:
• X : parts extracted from the component side.
•
a
: Through hole.
• b : Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side:
Parts on the pattern face side seen from the
(Side B)
pattern face are indicated.
Parts face side:
Parts on the parts face side seen from the
(Side A)
parts face are indicated.
• Abbreviation
CND
: Canadian
FR
: French
EA
: Saudi Arabia
CH
: Chinese
E
: Indication of country of origin
9E
: No Indication of country of origin
5E, 6E: South America
CEV
: Ukraine, Hungary, Czech
4-3. PRINTED WIRING BOARDS
D1
C-18
D2
C-4
D3
C-4
D301
B-19
D401
E-14
D402
E-14
IC1
D-3
IC101
D-9
IC701
C-14
IC702
B-17
IC703
C-15
Q2
C-3
Q51
B-13
Q52
B-13
Q53
B-13
Q303
E-4
Q304
B-12
Q305
B-13
Q401
D-14
Q603
B-4
Q604
C-11
Q605
C-11
Q606
C-12
Q607
C-11
Q701
E-14
Q702
E-7
Q703
B-15
Q751
B-14
Q752
B-14
Ref. No.
Location
z Semiconductor
Location
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
A
1
B
C
D
E
F
G
J301
i
L2
AM
FERR ITE-ROD
ANTENNA
02
PH751
R15
R2
C52
R1
US,CND,
5E,6E MODEL
EXCEPT US,CND,
5E,6E MODEL
R14
C28
C1
C18
R771
C708
C53
R310
C714
R11
R55
R52
R53
C51
R54
Q52
C715
C712
C713
C717
R754
R751
R770
R612
R615
R614
R613
C706
R20
R706
R704
C705
C704
R701
R403 C404
R402
C406
C403
D401
R401
C405
C401
C707
R711
Q606
Q604
Q605
Q304
TP823TP824
TP825
TP826
TP843
TP844
TP852
TP859
TP865
TP866
TP881
TP230
TP232
TP201
TP228
TP229
TP206
TP401
TP25
TP211
TP212
TP215
TP218
TP834
TP835
TP836
TP837
TP839
TP840
TP601
TP204
TP205
R304
TH601
R610
C608
R611
X701
IC701
IC703
C36
R13
R715
TP861
Q607
D402
R404
C407
TP231
Q305 Q51
Q752
Q703
Q701
TP845
TP841
Q53
C2
D1
C19
Q401
C15
JC101
L401
C37
C716
R209
R109
Q751
IC702
1
2
3
C718
R757
R758
R755
R756
C311
L702
R753
C40
C8
JC102
JC108
C402
JC103
C313
C719
C720
C721
C722
C723
C724
C725
D301
JC111
TP808
C709
R759
TP854
FWD
FF
S601
REV
REW
FF
FWD
R22
R609
C17
S715
RADIO ON
BAND
R21
C32
C22
C29
R3
R4
R6
R8
C33
R19
R10
R5
IC1
1
5
10
12
13
15
20
24
X1
R12
C24
R16
C16
C21
C23
C20
R9
C5
C10
C11
C4
C13
S708
MENU
ND701
LIQUID CRYSTAL
DISPLAY
R107
S702
ENTER
REW–
S704
C31
S707
FF
C312
R17
S709
C12
C6
R18
C3
C26
VOL
C207
C107
C7
R305
R208
R108
S714
S712
22
20
15
10
5
1
TUNING +
R608
R207
R724
R606
R728
R727
R7
R707
C710
TP101
TP102
TP104
TP105
TP106
TP108
TP112
TP113
TP114
TP116
TP117 TP119
TP121
TP122
TP123
TP124
TP127
TP129
RV601
TP130
TP132
TP730
TP753
TP754
TP759
TP766
TP770
TP781
(VT)
TP11
TP12
BT2
BT1
TP301
TP203
TP21
TP736
TP737
TP739
TP740
TP741
TP2
TP5
TP115
C702
C701
R705
R700
Q702
Q603
IC101
TP103
RADIO OFF
S711
C9
C30
C35
C25
Q2
C34
FB301
FB312
FB313
L701
FB201
R
L
G
D3
D2
R708
C14
R752
TP708
TP752
R100
R726
R723
R729
Q303
R702
R703
FB311
FB101
TP202
TP107
TP755
TP757
TP758
TP727
TP745
TP744
FB2
C41
JC106
JC107
TP735
JC109
JC110
R722
R761
1
6
5
CN303
TP1
MODEL
TP731
TP734
TP725
TP724
TP760
TP764
(GND)
TP809
C305
CF2
L4
L3
CF1
L1
US,CND,5E,6E
CT1
J303
EXCEPT
E,EA,9E,CH MODEL
E,EA,9E,CH MODEL
FL1
TP844
TP204
T1
C610
U
(WHT)
(RED )
(ORG)
W
(BLK )
V
COM
11
(11)
1-675-208-
11
(11)
1-675-208-
S701
HOLD
ONTOFF
[MAIN BOARD] (SIDE A)
[MAIN BOARD]
(SIDE B)
S301
(OPEN DET)
1
60
5
55
10
50
15
45
20
21
80
25
75
30
70
35
65
40
61
41
S705
SET
RV301
w
TUNING –
16
12
9
8
5
1
32
30
25
24
20
17
x
DC IN 3V
M901
REEL/CAPSTAN
MOTOR
U
V
W
COM
TP26
L-CH
R-CH
R-CH
L-CH
FWD
REV
6
2
3
4
5
HP901
PLAYBACK
HEAD
DRY BATTERY
SIZE "AA"
(DESIGNATION R6)
2PCS, 3V
Y
S
DG
T401
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
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
– 19 –
– 21 –
– 20 –
4-4. SCHEMATIC DIAGRAM
Note:
• 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.
• U : 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 (RADIO SECTION)
PLAY (TAPE SECTION)
(
) : AM
• 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.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
f
: AM
E
: PB
• Abbreviation
CND
: Canadian
FR
: French
EA
: Saudi Arabia
CH
: Chinese
E
: Indication of country of origin
9E
: No Indication of country of origin
5E, 6E: South America
CEV
: Ukraine, Hungary, Czech
z Waveforms
1
IC701 uf
XOUT
2
VOLT/DIV : 50 mV AC
TIME/DIV : 5 µsec
Q401 C
VOLT/DIV : 1 V AC
TIME/DIV : 0.1 msec
290 mVp-p
75 kHz
3.2 Vp-p
369 nsec
z Refer to page 22 for IC Block Diagram.
WM-FX491/FX491ST/FX493/FX493ST
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
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
– 22 –
– 24 –
– 23 –
z IC Block Diagram.
IC1 TA2104AFN (EL)
21
22
23
24
2
3
5
4
6
7
8
9
10
1
11
12
13
14
15
16
17
18
19
20
FM
OSC
AM
OSC
BUFF
IF
BUFF
AF
BUFF
BUFF
AM
MIX
FM
MIX
FM
RF
ST
LEVEL
DET
1/8
AMIF
FMIF
AGC
SW
IF
RED
AM
DET
FM
DET
AF
ST/MO
FM/AM
MUTE
VCO
DIVIDE
DECOOE
FM RF OUT
RF VCC
AM RF IN
FM OSC
AM OSC
OSC OUT
ST-LED
IF REQ
DET OUT
MPX-IN
LPF1/MO-ST
LPF2/BAND
RF GND
FM RF IN
AM LOW CUT
MIX OUT
VCC
AM IF IN
FM IF IN
GND
AGC
QUAD
R-OUT
L-OUT
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
CND
: Canadian
FR
: French
EA
: Saudi Arabia
CH
: Chinese
E
: Indication of country of origin
9E
: No Indication of country of origin
5E, 6E : South America
CEV
: Ukraine, Hungary, Czech
5-1. CABINET SECTION
5-2. MECHANISM DECK SECTION
(MT-WMEX404-147)
53
52
52
54
71
56
55
71
57
58
59
60
70
61
62
68
69
M901
63
64
66
66
67
67
69
68
65
51
HP901
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
1
3-039-652-01 LID,BATTERY CASE (FX491,FX491ST)
1
3-039-652-11 LID,BATTERY CASE (FX493,FX493ST)
2
3-039-658-01 RUBBER (B), BUTTON
3
X-3378-293-1 CABINET (FRONT) SUB ASSY(FX491,FX491ST)
3
X-3378-294-1 CABINET (FRONT) SUB ASSY(FX493,FX493ST)
4
3-039-657-01 RUBBER (A), BUTTON
5
3-704-197-11 LOCK,SERRAT IB
* 6
3-039-660-01 HOLDER (LCD)
7
3-040-176-01 RUBBER, CONDUCTIVE
8
3-022-857-01 SPRING (OPEN)
9
3-022-856-01 SPRING (KNOB), TENSION
10
3-704-197-91 SCREW (M1.4X1.8), LOCKING
11
3-019-421-01 LEVER, OPEN
12
3-019-422-01 JOINT
13
3-349-825-31 SCREW
14
3-318-382-61 SCREW (1.7X2.5), TAPPING
15
3-039-661-01 LOCKER (OPEN)
16
3-025-276-01 SPRING (LID UP)
17
X-3378-289-1 HOLDER SUB ASSY, CASSETTE
(FX491:CND,5E,6E,FX491ST)
17
X-3378-290-1 HOLDER SUB ASSY, CASSETTE
(FX491:AEP,CEV,FR,E,9E,CH)
17
X-3378-291-1 HOLDER SUB ASSY, CASSETTE
(FX493:US,5E,6E,FX493ST)
17
X-3378-292-1 HOLDER SUB ASSY, CASSETTE
(FX493:AEP,CEV,FR,9E,EA,CH)
18
3-019-514-21 KNOB(OPEN)
19
3-039-651-01 CENTER CABINET (US,CND,5E,6E)
19
3-039-651-11 CENTER CABINET (E,EA,CH)
19
3-039-651-21 CENTER CABINET (AEP,CEV,FR)
19
3-039-651-31 CENTER CABINET (9E)
20
3-318-203-51 SCREW (B1.7X12), TAPPING
21
3-040-144-01 SPRING (CASSETTE)
23
3-020-511-01 TERMINAL (+), BATTERY
24
A-3021-309-A MAIN BOARD, COMPLETE (US,CND)
24
A-3021-310-A MAIN BOARD, COMPLETE (AEP,CEV)
24
A-3021-311-A MAIN BOARD, COMPLETE (E,9E,EA,CH)
24
A-3021-312-A MAIN BOARD, COMPLETE (5E,6E)
24
A-3021-313-A MAIN BOARD, COMPLETE (FR)
25
3-020-512-01 TERMINAL (-), BATTERY
L2
1-501-987-21 AM FERRITE-ROD ANTENNA (AM TRACKING)
ND701
1-803-764-11 DISPLAY PANEL, LIQUID CRYSTAL
ND701
MT-WMEX404-147
L2
1
4
3
2
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
23
24
25
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
51
X-3375-020-1 PINCH LEVER (N-F) ASSY
52
X-3372-619-1 WHEEL ASSY (SP), CAPSTAN
53
3-354-868-01 BELT
54
3-021-950-01 GEAR (DF)
55
3-021-982-01 SPRING (MODE), COMPRESSION
56
X-3375-024-1 CLUTCH ASSY (F)
57
3-021-951-01 GEAR (CAM)
58
3-348-953-21 WASHER
59
3-021-979-01 SPRING (UDF), COMPRESSION
60
3-021-949-01 GEAR (BF)
61
X-3375-022-1 CHASSIS ASSY (F)
62
3-021-974-03 SPRING (HEAD BASE)
63
3-703-816-31 SCREW (M1.4), SPECIAL HEAD
64
X-3375-021-1 PINCH LEVER (R-F) ASSY
65
3-703-816-73 SCREW (M1.4), SPECIAL HEAD
66
3-921-797-01 WASHER
67
3-921-003-01 BEARING
68
3-022-100-01 SPRING (B.T.), COMPRESSION
69
3-024-223-01 GEAR (REEL-2)
70
X-3375-268-1 GEAR (AF-SV) ASSY
71
3-034-685-01 WASHER (1.03-3.0)
HP901
1-500-555-11 HEAD, MAGNETIC (PLAYBACK)
M901
1-763-073-11 MOTOR, DC (CAPSTAN/REEL)
(INCLUDING PULLEY)
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
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
– 25 –
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.
SECTION 6
ELECTRICAL PARTS LIST
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
• Abbreviation
CND
: Canadian
FR
: French
EA
: Saudi Arabia
CH
: Chinese
E
: Indication of country of origin
9E
: No Indication of country of origin
5E, 6E : South America
CEV
: Ukraine, Hungary, Czech
A-3021-309-A MAIN BOARD, COMPLETE (US,CND)
A-3021-310-A MAIN BOARD, COMPLETE (AEP,CEV)
A-3021-311-A MAIN BOARD, COMPLETE (E,EA,9E,CH)
A-3021-312-A MAIN BOARD, COMPLETE (5E,6E)
A-3021-313-A MAIN BOARD, COMPLETE (FR)
*********************
3-020-511-01 TERMINAL (+), BATTERY
3-020-512-01 TERMINAL (-), BATTERY
*
3-039-660-01 HOLDER (LCD)
3-040-176-01 RUBBER, CONDUCTIVE
< CAPACITOR >
C1
1-115-416-11 CERAMIC CHIP
1000PF
5%
25V
C2
1-162-959-11 CERAMIC CHIP
330PF
5%
50V
C3
1-162-995-11 CERAMIC CHIP
0.022uF
50V
C4
1-162-907-11 CERAMIC CHIP
2PF
0.25PF 50V
C5
1-162-995-11 CERAMIC CHIP
0.022uF
50V
C6
1-164-156-11 CERAMIC CHIP
0.1uF
25V
C7
1-162-919-11 CERAMIC CHIP
22PF
5%
50V
C8
1-162-959-11 CERAMIC CHIP
330PF
5%
50V
C9
1-163-033-91 CERAMIC CHIP
0.022uF
50V
C10
1-115-416-11 CERAMIC CHIP
1000PF
5%
25V
C11
1-115-416-11 CERAMIC CHIP
1000PF
5%
25V
C12
1-162-915-11 CERAMIC CHIP
10PF
0.5PF
50V
C13
1-162-970-11 CERAMIC CHIP
0.01uF
10%
25V
C14
1-162-909-11 CERAMIC CHIP
4PF
0.25PF 50V
C15
1-162-970-11 CERAMIC CHIP
0.01uF
10%
25V
C16
1-115-416-11 CERAMIC CHIP
1000PF
5%
25V
C17
1-115-156-11 CERAMIC CHIP
1uF
10V
C18
1-107-826-91 CERAMIC CHIP
0.1uF
10%
16V
C19
1-109-982-11 CERAMIC CHIP
1uF
10%
10V
C20
1-164-156-11 CERAMIC CHIP
0.1uF
25V
C21
1-162-970-11 CERAMIC CHIP
0.01uF
10%
25V
(EXCEPT US,CND,5E,6E)
C21
1-164-245-11 CERAMIC CHIP
0.015uF
10%
25V
(US,CND,5E,6E)
C22
1-162-970-11 CERAMIC CHIP
0.01uF
10%
25V
(EXCEPT US,CND,5E,6E)
C22
1-164-245-11 CERAMIC CHIP
0.015uF
10%
25V
(US,CND,5E,6E)
C23
1-125-837-91 CERAMIC CHIP
1uF
10%
6.3V
C24
1-125-837-91 CERAMIC CHIP
1uF
10%
6.3V
C25
1-109-935-11 TANTAL. CHIP
4.7uF
20%
4V
C26
1-162-974-11 CERAMIC CHIP
0.01uF
50V
C28
1-162-974-11 CERAMIC CHIP
0.01uF
50V
C29
1-115-467-11 CERAMIC CHIP
0.22uF
10%
10V
C30
1-163-275-11 CERAMIC CHIP
0.001uF
5%
50V
C31
1-113-988-11 TANTAL. CHIP
68uF
20%
4V
C32
1-164-315-11 CERAMIC CHIP
470PF
5%
50V
C33
1-115-416-11 CERAMIC CHIP
1000PF
5%
25V
(US,CND,5E,6E)
C34
1-164-315-11 CERAMIC CHIP
470PF
5%
50V
C35
1-162-970-11 CERAMIC CHIP
0.01uF
10%
25V
C36
1-162-970-11 CERAMIC CHIP
0.01uF
10%
25V
C37
1-162-970-11 CERAMIC CHIP
0.01uF
10%
25V
C40
1-162-921-11 CERAMIC CHIP
33PF
5%
50V
C41
1-115-416-11 CERAMIC CHIP
1000PF
5%
25V
C51
1-162-964-11 CERAMIC CHIP
0.001uF
10%
50V
C52
1-104-847-11 TANTAL. CHIP
22uF
20%
4V
C53
1-162-970-11 CERAMIC CHIP
0.01uF
10%
25V
C107
1-115-156-11 CERAMIC CHIP
1uF
10V
C205
1-115-156-11 CERAMIC CHIP
1uF
10V
C207
1-115-156-11 CERAMIC CHIP
1uF
10V
C305
1-124-433-00 ELECT
100uF
20%
4V
C311
1-107-826-91 CERAMIC CHIP
0.1uF
10%
16V
C312
1-107-826-91 CERAMIC CHIP
0.1uF
10%
16V
C313
1-115-416-11 CERAMIC CHIP
1000PF
5%
25V
C401
1-115-416-11 CERAMIC CHIP
1000PF
5%
25V
C402
1-164-505-11 CERAMIC CHIP
2.2uF
16V
C403
1-162-915-11 CERAMIC CHIP
10PF
0.5PF
50V
C404
1-162-915-11 CERAMIC CHIP
10PF
0.5PF
50V
C405
1-104-847-11 TANTAL. CHIP
22uF
20% 4V
C406
1-162-974-11 CERAMIC CHIP
0.01uF
50V
C407
1-162-974-11 CERAMIC CHIP
0.01uF
50V
C608
1-107-826-91 CERAMIC CHIP
0.1uF
10%
16V
C610
1-124-434-00 ELECT
220uF
20%
4V
C701
1-162-974-11 CERAMIC CHIP
0.01uF
50V
C702
1-104-847-11 TANTAL. CHIP
22uF
20%
4V
C704
1-162-964-11 CERAMIC CHIP
0.001uF
10%
50V
C705
1-115-467-11 CERAMIC CHIP
0.22uF
10%
10V
C706
1-162-927-11 CERAMIC CHIP
100PF
5%
50V
C707
1-162-927-11 CERAMIC CHIP
100PF
5%
50V
C708
1-115-416-11 CERAMIC CHIP
1000PF
5%
25V
C709
1-162-927-11 CERAMIC CHIP
100PF
5%
50V
C710
1-162-974-11 CERAMIC CHIP
0.01uF
50V
C712
1-162-917-11 CERAMIC CHIP
15PF
5%
50V
C713
1-162-917-11 CERAMIC CHIP
15PF
5%
50V
MAIN
www. xiaoyu163. com
QQ 376315150
9
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9
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TEL 13942296513
9
9
2
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9
4
2
9
8
0
5
1
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
– 26 –
C714
1-115-156-11 CERAMIC CHIP
1uF
10V
C715
1-164-156-11 CERAMIC CHIP
0.1uF
25V
C716
1-164-156-11 CERAMIC CHIP
0.1uF
25V
C717
1-164-156-11 CERAMIC CHIP
0.1uF
25V
C718
1-115-416-11 CERAMIC CHIP
1000PF
5%
25V
C719
1-115-416-11 CERAMIC CHIP
1000PF
5%
25V
C720
1-115-416-11 CERAMIC CHIP
1000PF
5%
25V
C721
1-115-416-11 CERAMIC CHIP
1000PF
5%
25V
C722
1-115-416-11 CERAMIC CHIP
1000PF
5%
25V
C723
1-115-416-11 CERAMIC CHIP
1000PF
5%
25V
C724
1-115-416-11 CERAMIC CHIP
1000PF
5%
25V
C725
1-115-416-11 CERAMIC CHIP
1000PF
5%
25V
< FILTER >
CF1
1-781-271-11 FILTER, CERAMIC
CF2
1-781-152-11 FILTER, CERAMIC
< CONNECTOR >
CN303
1-750-346-21 CONNECTOR, FFC/EPC (ZIF) 6P
< TRIMMER >
CT1
1-141-463-11 CAP, ADJ 10PF (AM TRACKING)
< DIODE >
D1
8-719-053-30 DIODE MA2S357-(TX). SO
D2
8-719-072-58 DIODE SVC347-TL
D3
8-719-053-30 DIODE MA2S357-(TX). SO
D301
8-719-017-58 DIODE MA8068
D401
8-719-073-01 DIODE MA111-(K8).S0
D402
8-719-056-89 DIODE UDZ-TE-17-12B
< FERRITE BEAD >
FB2
1-500-113-22 FERRITE
FB101
1-500-113-22 FERRITE
FB201
1-500-113-22 FERRITE
FB301
1-500-113-22 FERRITE
FB311
1-500-113-22 FERRITE
FB312
1-500-113-22 FERRITE
FB313
1-500-113-22 FERRITE
< FILTER >
FL1
1-236-711-21 FILTER, BAND PASS
< IC >
IC1
8-759-564-18 IC TA2104AFN(EL)
IC101
1-418-581-11 EG UNIT (WFX)
IC701
8-759-653-11 IC TC9327AF-621
IC702
8-759-457-70 IC XC62RP1602MR
IC703
8-759-457-68 IC AK93C45AV-L
< JACK >
J301
1-785-164-11 JACK (i)
J303
1-750-061-11 JACK,DC(POLARITY UNIFIED TYPE)
(DC IN 3V) (E,EA,9E,CH)
< JUMPER RESISTOR >
JC101
1-216-296-00 METAL CHIP
0
5%
1/8W
JC102
1-216-296-00 METAL CHIP
0
5%
1/8W
JC103
1-216-864-11 METAL CHIP
0
5%
1/16W
JC106
1-216-296-00 METAL CHIP
0
5%
1/8W
JC107
1-216-296-00 METAL CHIP
0
5%
1/8W
JC108
1-216-864-11 METAL CHIP
0
5%
1/16W
JC109
1-216-295-00 METAL CHIP
0
5%
1/10W
JC110
1-216-295-00 METAL CHIP
0
5%
1/10W
JC111
1-216-296-00 METAL CHIP
0
5%
1/8W
< COIL >
L1
1-416-596-11 COIL (RF) (FM TRACKING)
L2
1-501-987-21 AM FERRITE-ROD ANTENNA (AM TRACKING)
L3
1-416-595-11 COIL (OSC) (FM FREQUENCY COVERAGE)
L4
1-415-962-11 COIL (OSC) (AM FREQUENCY COVERAGE)
L401
1-412-991-11 INDUCTOR
10uH
L701
1-412-995-21 INDUCTOR
22uH
L702
1-412-973-11 INDUCTOR
0.33uH
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