Sony WM-FX141 User manual
WM-FX141
US Model
AEP Model
E Model
SERVICE MANUAL
RADIO CASSETTE PLAYER
MICROFILM
Model Name Using Similar Mechanism WM-FX101
Tape Transport Mechanism Type MF-WMFX103-48
SPECIFICATIONS
Radio Frequency
FM : 87.6 – 108 MHz (US, Chilean, LatinAmerica, Central and
South America Models)
: 65.0 – 107.9MHz (East European Model)
: 87.6 – 107.9 MHz (Other Models)
AM : 530 – 1,710 kHz (US, Chilean, LatinAmerica, Central and
South America Models)
: 531 – 1,602kHz (Other Models)
Power requirements
3V DC batteries R6 (size AA) ×2
External DC 3V power sources
Battery life
(Aprroximate hours)
Battery Playback Radio
Sony alkaline LR6 (SG) 16 hrs 48 hrs
Sony R6P (SR) 4.5 hrs 16 hrs
Dimensions
93.9 ×118.5 ×35.9 mm (w/h/d)
(33/4×43/4×13/16 in.) incl. projecting parts
Mass
205g (7.3 oz) incl.batteries
Supplied accessories
•Stereo headphones or earphones (1)
•Belt clip (1)
Design and specifications are subject to change without notice.
Ver 1.3 1999. 05
With SUPPLEMENT-1 (9-923-296-81)
With SUPPLEMENT-2 (9-923-296-82)
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TEL 13942296513 QQ 376315150 892498299
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— 2 —
TABLE OF CONTENTS
1. GENERAL ·········································································· 3
2. DISASSEMBLY
2-1. Cabinet (Rear) ································································· 4
2-2. Mechanism Deck and Main Board ································· 4
2-3. Main Board ····································································· 5
2-4. Cassette Lid·····································································5
2-5. Dial Pointer Setting························································· 5
3. ADJUSTMENT
3-1. Mechanical Adjustment ·················································· 6
3-2. Electrical Adjustment······················································ 6
4. DIAGRAMS
4-1. Block Diagram ································································ 9
4-2. Schematic Diagram ······················································· 11
4-3. Printed Wiring Board ···················································· 13
4-4. IC Block Diagram ························································· 17
5. EXPLODED VIEWS
5-1. Cabinet and Board Section ··········································· 18
5-2. Mechanism Section (MF-WMFX103-48) ···················· 19
6. ELECTRICAL PARTS LIST ······································· 20
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing
• Keep the temperature of 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.
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TEL 13942296513 QQ 376315150 892498299
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— 4 —
SECTION 2
DISASSEMBLY
2-1. CABINET (REAR)
2-2. MECHANISM DECK AND MAIN BOARD
1
Remove the mechanism deck
and main board in the
direction of the arrow.
head flexible board
mechanism dec
k
and MAIN board
*
note for installation :
Make sure to put the head flexible
board to ditch before install the
mechanism deck and MAIN board.
Note : Follow the disassembly procedure in the numerical order given.
Note : Disassemble the unit in the order as shown below.
Cabinet (Rear) Mechanism deck and main board Main board
Cassette lid
Dial pointer setting
Cassette lid
Cabinet(rear)
1
Open the cassette lid and release claw
A
.
2
Remove the cabinet(rear).(Release
all claws
B
from
M
in alphabetical order.)
A
BC
D
E
I
K
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J
H
G
F
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— 5 —
2-3. MAIN BOARD
1
head flexible board
3
MAIN boar
d
2
claws
2-4. CASSETTE LID
Front cabine
t
A
3
Cassette lid
(Remove it in the
direction of the arrow)
1
Release the catch
A
.
2
Release the catch
B
.
B
2
Align pointer with arrow
marked side as shown in Fig.1
and then fit to groove in the
order of
A
and
B
.
Align
Pointe
r
Fig. 1
Pointer
1
Rotate tune knob fully to arrow direction.
A
B
2-5. DIAL POINTER SETTING
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TEL 13942296513 QQ 376315150 892498299
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— 6 —
SECTION 3
ADJUSTMENTS
3-1. MECHANICAL ADJUSTMENTS
Precaution
1. Clean the following parts with a denatured-alcohol-moistend
swab :
playback head pinch roller
capstan rubber belts
2. Demagnetize the playback head with a head demagnetizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
5. The adjustmentsshould be perfomedwith the ratedpower supply
voltage (2.5V) unless otherwise noted.
Torque Measurement
3-2. ELECTRICAL ADJUSTMENTS
Precaution
•Supplied voltage : 2.5V
•Switch and control position
TAPE switch : NORM
VOLUME control : maximum
AVLS switch : OFF
Mode Torque meter Meter reading
FWD
FWD
Back Tension
FF, REW
CQ-102C
CQ-201B
20 to 42 g•cm
(0.28 to 0.58 oz•inch)
less than 2 g•cm
(less than 0.03 oz•inch)
more than 60 g•cm
(more than 0.83 oz•inch)
TAPE SECTION
•FUNCTION switch : TAPE
Test tape
Type Signal Used for
WS-48A 3kHz, 0dB Tape Speed Adjustment
Tape speed adjustment
Tape selection adjustment : NORM
Procedure :
Adjustment Value: normal tape speed
Adjustthe tape speedadjustment RV601,sothatthe freqencycounter
reading becomes 3,000Hz.
Specification Value:
Frequency difference between the beginning and the end of the tape
should be within 1.5% (45Hz).
Adjustment Location :
0dB=0.775V
Digital frequency counter
2,945 to 3,015Hz
set
16
Ω
J302(phones)
frequency
counter
test tape
WS-48A
(3kHz, 0dB)
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— 7 —
[AM]
BAND: AM
Signal generator
[FM]
BAND : FM
Signal generator
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1 620kHz(800kHz)
CT1 1,400kHz(1,300kHz)
TUNER SECTION
Put the lead-wire
antenna close to
the set.
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
AM RF signal
generator
0.01
µ
F
FM RF signal
generator
antenna termina
l
75kHz(100%) amplitude modulation
by 1kHz signal.
Output level: as low as possible
16
Ω
set
level mete
r
J302 (phones)
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L4 505kHz(516.5kHz)
CT4 1,750kHz(1,631.5kHz)
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1 455kHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L2 86.0MHz[64MHz]
CT2 109.5MHz
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L3 86.0MHz[64MHz]
CT3 109.5MHz
( ) :E, Mexican, East European,AEP
[ ] : East European
Adjustment Location: Main board (See page 8)
0 dB = 1 µV • Repeat the procedures in each adjustment several times for the
maximum level meter indication.
• The frequency coverage and tracking adjustments should be
finally done by the trimmer capacitors.
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— 8 —
AdjustmentLocation:Mainboard
CT1
AM Tracking
Adjustment
CT2
FM Tracking
Adjustment
L2
FM Tracking
Adjustment
L1
AM Tracking
Adjustment
L3
FM Frequency
coverage
Adjustment
CT3
FM Frequency
coverage
Adjustment L4
AM Frequency
coverage Adjustment
CT4
AM Frequency
coverage
Adjustment
T1
AM IF
Adjustment
antenna terminal
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TEL 13942296513 QQ 376315150 892498299
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WM-FX141
— 9 — — 10 —
4-1. BLOCK DIAGRAM
SECTION 4
DIAGRAM
IC301
28
L
JC2
R
M
2
1
23
3 8
19 18
15 12 6
T1
AM IF
CF1
CF2
425 RV301
VOLUME
HP901
E,MX,EE,AEP
MODEL
PLAYBACK
HEAD
M901
REEL/CAPSTAN
MOTOR
5
24
6
18
9
2
↓
↓
1
OFF
14L OUT
13R OUT
FM MIX
AM MIX
AM OSC
FM OSC
FM RF OUT
AM RF IN
FM RF IN
AUDIO AMP
MOTOR DRIVE
IC1
FM/AM,RF/AF AMP
E,MX,EE,AEP MODEL
J302
J301
• Signal path
• Abbreviation
EE : East European model
MX : Mexican model
DC IN 3V
Q301
PHONES
SWITCH
S305
AVLS
S302
POWER
S303(2/2)
LPF CP1
DX → LOCAL
16
13
23 22 20
8
19
17
RV601
TAPE SPEED
+
–
S303(1/2)
(TAPE SEL)
CrO2/METAL ← NORM
S304
(FUNCTION)
FM → AM → TAPE
X1
VCO
AM IF IN
FM IF IN
VCC2 16
LP2
19kHz 10.7MHz
7
L2
FM
TRACKING CT2
CV2
X2
QUAD
DET OUT MPX IN
L3
FM
FREQ.
COVER CT3
CV3
20
L4
AM
FREQ.
COVER
CT4
CV4
24
L1
AM
TRACKING CT1
CV1
22
VCC1
21
: FM
: AM
E: PB
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WM-FX141
4-2. SCHEMATIC DIAGRAM — MAIN SECTION —
— 11 — — 12 —
•Waveform
1IC1 !∞
1.5 Vp-p
19kHz
1µsec/div
0.5V/div
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 Ωand 1/4W or less unless otherwise
specified.
•¢: internal component.
•U: B+ Line.
•H: adjustment for repair.
• Power voltage is dc 3V and fed with regulated dc power
supply from external power voltage jack (J301) .
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
( ) : PB
• Voltagesare takenwith aVOM(Input impedance 10MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
• Signal path.
F: FM
f: AM
E: PB
• Abbreviation
EE : East European model
5E : Chilean model
6E : Latin America model
8E : Central and South America model
MX : Mexican model
L5
THP602 2k 1000PPM
C1
*
JR5
JR1
C5
*
R1
*
L1
L3
L4
C4
*
C3
*
L2
C2
*
C18
*
C19
*
R602
*
R601
*
R603
*
R201
*
R202
*
R102
*
R101
*
US,5E,6E,8E
E,MX,AEP
C1
1PF
1PF
3PF
EE
C4
6PF
6PF
9PF
C5
33PF
33PF
0.0022uF/100v
C18,C19
0.018uF
0.012uF
0.012uF
C2
18PF
18PF
6PF
C3
22PF
22PF
8PF
R1
22
22
18
R101,R201
0
10
0
R102,R202
180k
39k
180k
R601
3.9
1.5
1.5
R602
5.6
2.2
2.2
R603
750
680
680
*
J302
M901
(REEL/CAPSTAN)
US,5E,6E,8E
MODEL
JC6
LOCAL
E,MX,EE,AEP MODEL
DX
S303(2/2)
L1
AM FERRITE-ROD ANTENNA
JC2
JC3
LPF
C16 0.022
CP1
*
↓
↓
→→ →→
↑
AM IF
2.8
2.8
2.8
0
1.5
1.5
0.8 2
10.7
MHz
AM
TRACKING
L1,CT1
TUNING
CV1-4
FM TRACKING
L2,CT2
FM FREQ. COVER
L3,CT3 AM FREQ. COVER
L4,CT4
AEP,E,MX,EE
MODEL
0
0
0
0
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TEL 13942296513 QQ 376315150 892498299
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WM-FX141
— 13 — — 14 — — 15 — — 16 —
4-3. PRINTEDWIRING BOARD — MAIN SECTION —
Note:
•X: parts extracted from the component side.
•Y: parts extracted from the conductor side.
•®: Through hole.
•b: Pattern from the side which enables seeing.
•Abbreviation
EE : East European model
5E : Chilean model
6E : Latin America model
8E : Central and South America model
MX : Mexican model
12
A
B
C
D
E
F
G
345678910111213141516171819202122232425
• Semiconductor
Location
Ref. No. Location
IC1 E-9
IC301 D-6
Q301 E-5
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4-4. IC BLOCK DIAGRAM
SECTION 5
EXPLODEDVIEWS
NOTE:
• -XX, -X mean standardized parts, so they may
have some differences from the original one.
• Items marked “*” are not stocked since they
are seldom required for routine service. Some
delayshould be anticipated when orderingthese
items.
• Themechanical parts withno 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.
5-1. CABINET AND BOARD SECTION
5-2. MECHANISM SECTION (MF-WMFX103-48) 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.
• Items marked “*” are not stocked since they
are seldom required for routine service. Some
delayshould be anticipated when orderingthese
items.
• CAPACITORS:
uF: µF
• RESISTORS
All resistors are in ohms.
METAL: metal-film resistor
METAL OXIDE: Metal Oxide-film resistor
F: nonflammable
• COILS
uH: µH
• SEMICONDUCTORS
In each case, u: µ, for example:
uA...: µA... , uPA... , µPA... ,
uPB... , µPB... , uPC... , µPC... ,
uPD..., µPD...
Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks
SECTION 6
ELECTRICAL PARTS LIST
— 17 — — 18 — — 19 — — 20 —
Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks
1 3-910-921-41 CABINET (REAR) (CF-O)
2 3-910-899-11 LID, BATT
3 3-910-896-01 GROUND, MOTOR
4 3-910-538-01 BUTTON (PLAY)
5 3-910-540-11 BUTTON (REW)
6 3-910-539-11 BUTTON (FF)
7 3-910-541-11 BUTTON (STOP)
8 A-3016-889-A MAIN BOARD, COMPLETE (US, 5E, 6E, 8E)
8 A-3021-093-A MAIN BOARD, COMPLETE (EE)
8 A-3021-094-A MAIN BOARD, COMPLETE (E, MX, AEP)
9 3-910-894-01 TERMINAL (+), BATTERY
10 3-910-895-01 TERMINAL (–), BATTERY
11 3-364-675-01 SPRING (CASSETTE)
13 3-910-911-01 POINTER
14 3-933-675-01 GEAR (TUNE)
15 3-910-902-12 KNOB (TUNE)
16 X-3375-408-1 HOLDER (CF-U), CASSETTE ASSY
(US, 5E, 6E, 8E)
16 X-3375-604-1 HOLDER ASSY, CASSETTE (E, MX, AEP)
16 X-3375-605-1 HOLDER ASSY, CASSETTE (EE)
17 3-910-903-01 SPRING, TORSION
18 3-910-920-41 CABINET (FRONT) (CFO) (US, 5E, 6E, 8E)
18 3-910-920-01 CABINET (FRONT) (CFO) (EE, E, MX, AEP)
L1 X-3371-847-1 ANTENNA SUB ASSY, FERRITE-ROD
51 X-3367-902-1 ARM (N) ASSY, PINCH
52 3-364-328-01 SPRING, COMPRESSION
53 3-910-635-01 SCREW
54 3-910-647-01 LEVER (PR/O), PLAY
56 3-354-868-01 BELT
57 3-352-758-21 SCREW (M1.7), TOOTHED LOCK
58 3-321-483-11 RING, RETAINING
Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks
59 3-364-320-01 GEAR (S REEL)
60 3-909-727-01 GEAR (REVERSE)
61 3-910-640-01 GEAR (T REEL)
62 X-3367-905-1 CLUTCH ASSY
63 X-3368-729-1 CHASSIS ASSY
HP901 1-500-115-11 HEAD, MAGNETIC (PLAYBACK)
M901 1-698-353-11 MOTOR, DC (REEL/CAPSTAN)(WITH PULLEY)
A-3016-889-A MAIN BOARD, COMPLETE (US, 5E, 6E, 8E)
*********************
A-3021-093-A MAIN BOARD, COMPLETE (EE)
*********************
A-3021-094-A MAIN BOARD, COMPLETE (E, MX, AEP)
*********************
3-910-894-01 TERMINAL (+), BATTERY
3-910-895-01 TERMINAL (–), BATTERY
< CAPACITOR >
C1 1-163-083-00 CERAMIC CHIP 1PF 50V
(EXCEPT EE)
C1 1-163-086-00 CERAMIC CHIP 3PF 50V (EE)
C2 1-163-099-00 CERAMIC CHIP 18PF 5% 50V
(EXCEPT EE)
C2 1-163-089-00 CERAMIC CHIP 6PF 50V (EE)
C3 1-163-101-00 CERAMIC CHIP 22PF 5% 50V
(EXCEPT EE)
C3 1-163-091-00 CERAMIC CHIP 8PF 50V (EE)
C4 1-163-089-00 CERAMIC CHIP 6PF 50V
(EXCEPT EE)
C4 1-163-092-00 CERAMIC CHIP 9PF O.25PF 50V (EE)
C5 1-163-239-11 CERAMIC CHIP 33PF 5% 50V
(EXCEPT EE)
C5 1-164-161-11 CERAMIC CHIP 0.0022uF 10% 100V(EE)
C6 1-163-003-11 CERAMIC CHIP 330PF 10% 50V
C7 1-164-005-11 CERAMIC CHIP 0.47uF 25V
C8 1-163-038-91 CERAMIC CHIP 0.1uF 25V
C9 1-163-038-91 CERAMIC CHIP 0.1uF 25V
C10 1-163-038-91 CERAMIC CHIP 0.1uF 25V
C11 1-163-117-00 CERAMIC CHIP 100PF 5% 50V
C12 1-163-117-00 CERAMIC CHIP 100PF 5% 50V
C13 1-163-117-00 CERAMIC CHIP 100PF 5% 50V
C14 1-126-153-11 ELECT 22uF 20% 6.3V
C15 1-163-078-11 CERAMIC CHIP 0.033uF 10% 25V
C16 1-163-063-91 CERAMIC CHIP 0.022uF 10% 50V
C17 1-126-154-11 ELECT 47uF 20% 6.3V
C18 1-163-024-00 CERAMIC CHIP 0.018uF 10% 50V
(US, 5E, 6E, 8E)
C18 1-163-022-00 CERAMIC CHIP 0.012uF 10% 50V
(EE, E, MX, AEP)
C19 1-163-024-00 CERAMIC CHIP 0.018uF 10% 50V
(US, 5E, 6E, 8E)
C19 1-163-022-00 CERAMIC CHIP 0.012uF 10% 50V
(EE, E, MX, AEP)
C24 1-164-234-11 CERAMIC CHIP 1uF 10V
C101 1-163-007-11 CERAMIC CHIP 680PF 10% 50V
C102 1-126-153-11 ELECT 22uF 20% 6.3V
C103 1-163-019-00 CERAMIC CHIP 0.0068uF 10% 50V
C104 1-164-234-11 CERAMIC CHIP 1uF 10V
C105 1-163-117-00 CERAMIC CHIP 100PF 5% 50V
C106 1-163-009-11 CERAMIC CHIP 0.001uF 10% 50V
C201 1-163-007-11 CERAMIC CHIP 680PF 10% 50V
C202 1-126-153-11 ELECT 22uF 20% 6.3V
C203 1-163-019-00 CERAMIC CHIP 0.0068uF 10% 50V
C204 1-164-234-11 CERAMIC CHIP 1uF 10V
C205 1-163-117-00 CERAMIC CHIP 100PF 5% 50V
C206 1-163-009-11 CERAMIC CHIP 0.001uF 10% 50V
C301 1-164-505-11 CERAMIC CHIP 2.2uF 16V
C302 1-126-157-11 ELECT 10uF 20% 16V
C303 1-163-038-91 CERAMIC CHIP 0.1uF 25V
C304 1-163-038-91 CERAMIC CHIP 0.1uF 25V
C305 1-163-038-91 CERAMIC CHIP 0.1uF 25V
C306 1-124-434-00 ELECT 220uF 20% 4V
C307 1-164-505-11 CERAMIC CHIP 2.2uF 16V
C308 1-126-157-11 ELECT 10uF 20% 16V
C309 1-164-234-11 CERAMIC CHIP 1uF 10V
C310 1-163-117-00 CERAMIC CHIP 100PF 5% 50V
C311 1-163-117-00 CERAMIC CHIP 100PF 5% 50V
C601 1-126-154-11 ELECT 47uF 20% 6.3V
C602 1-164-005-11 CERAMIC CHIP 0.47uF 25V
C603 1-164-505-11 CERAMIC CHIP 2.2uF 16V
C604 1-163-809-11 CERAMIC CHIP 0.047uF 10% 25V
C605 1-164-005-11 CERAMIC CHIP 0.47uF 25V
C606 1-163-117-00 CERAMIC CHIP 100PF 5% 50V
< FILTER >
CF1 1-577-072-11 FILTER, CERAMIC
CF2 1-567-097-61 FILTER, CERAMIC
CP1 1-239-813-21 FILTER, BAND PASS (EE)
CP1 1-236-711-21 FILTER, BAND PASS (E, MX, AEP)
< CONNECTOR >
CN301 1-569-252-21 HOUSING, CONNECTOR (FPC) 5P
< VARIABLE CAPACITOR >
CT1-4 1-141-567-11 CAP, VAR (EXCEPT EE)
CT1-4 1-141-568-11 CAP, VAR (EE)
CV1-4 1-141-567-11 CAP, VAR (EXCEPT EE)
CV1-4 1-141-568-11 CAP, VAR (EE)
< IC >
IC1 8-759-230-39 IC TA8122AF
IC301 8-759-497-06 IC MM1316AFBE
< JACK >
J301 1-750-061-11 JACK, DC (POLARITY UNIFIED TYPE)(DC IN 3V)
J302 1-565-287-11 JACK (2)
IC1 TA8122AF
13
14
15
10
9
8
L1
4
7
6
5
3
2
1
17
16
18
11
MF-WMFX103-48
51
53
54
57
56
58
52
59
60
61
62
M901
not supplied
HP901
63
• Abbreviation
EE : East European model
5E : Chilean model
6E : Latin America model
8E : Central and South America model
MX : Mexican model
• Abbreviation
EE : East European model
5E : Chilean model
6E : Latin America model
8E : Central and South America model
MX : Mexican model
MAIN
When indicating parts by reference number,
please include the board name.
AM
AGC
FM
MIX
L
DET IF
TU
LED
ST
LED
FM
DET
FREQ.
DIVIDER
FM/AM
MONO SW
FM
AM
IF
FM
RF
AM
MIX
AM
DETRF
AM
FM
OSC
AM
OSC AF
PRE
PHASE
COM
PHASE
COM
VCO STEREO
DECODER
HYS SW
21 3 4 5 6 7 8 9 10 11 12
131415161718192021222324
FM RF
IN
GND1 FM MIX AM MIX AGC VCC2 AM IF
IN
FM IF
IN
GND2 TUN
LED
ST LED QUAD
R OUTL OUTVCOLPF2LPF1
MPX
IN
DET
OUT
AM
OSC
FM
OSCVCC1
FM RF
OUT
AM RF
OUT
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks
— 21 —
< JUMPER CAPACITOR >
JC2 1-216-295-91 SHORT 0 (EE, E, MX, AEP)
JC3 1-216-295-91 SHORT 0 (EE, E, MX, AEP)
JC6 1-216-295-91 SHORT 0
< JUMPER RESISTOR >
JR1 1-216-295-91 SHORT 0 (US, 5E, 6E, 8E)
JR5 1-216-295-91 SHORT 0 (US, 5E, 6E, 8E)
JR7 1-216-296-91 SHORT 0 (US, 5E, 6E, 8E)
< COIL >
L2 1-460-120-11 COIL (WITH CORE) (EXCEPT EE)
L2 1-426-578-11 COIL (WITH CORE) (EE)
L3 1-403-696-11 COIL (WITH CORE) (EXCEPT EE)
L3 1-409-655-11 COIL (WITH CORE) (EE)
L4 1-406-408-11 COIL (OSC) (EXCEPT EE)
L4 1-406-409-11 COIL (OSC) (EE)
L5 1-500-245-11 INDUCTOR CHIP 0uH
L101 1-500-245-11 INDUCTOR CHIP 0uH
L201 1-500-245-11 INDUCTOR CHIP 0uH
L301 1-500-245-11 INDUCTOR CHIP 0uH
< TRANSISTOR >
Q301 8-729-230-49 TRANSISTOR 2SC2712-YG
< RESISTOR >
R1 1-216-009-00 METAL CHIP 22 5% 1/10W
(EXCEPT EE)
R1 1-216-609-11 METAL CHIP 18 0.5% 1/10W
(EE)
R2 1-216-081-00 METAL CHIP 22K 5% 1/10W
R3 1-216-077-00 METAL CHIP 15K 5% 1/10W
R4 1-216-077-00 METAL CHIP 15K 5% 1/10W
R5 1-216-037-00 METAL CHIP 330 5% 1/10W
R101 1-216-295-91 SHORT 0 (EXCEPT E, MX)
R101 1-216-001-00 METAL CHIP 10 5% 1/10W
(E, MX)
R102 1-216-103-00 METAL CHIP 180K 5% 1/10W
(EXCEPT E, MX)
R102 1-216-689-11 METAL CHIP 39K 0.5% 1/10W
(E, MX)
R201 1-216-295-91 SHORT 0 (EXCEPT E, MX)
R201 1-216-001-00 METAL CHIP 10 5% 1/10W
(E, MX)
R202 1-216-103-00 METAL CHIP 180K 5% 1/10W
(EXCEPT E, MX)
R202 1-216-689-11 METAL CHIP 39K 0.5% 1/10W
(E, MX)
R301 1-216-089-91 RES, CHIP 47K 5% 1/10W
R302 1-216-073-00 METAL CHIP 10K 5% 1/10W
R303 1-216-109-00 METAL CHIP 330K 5% 1/10W
R304 1-216-308-00 METAL CHIP 4.7 5% 1/10W
R601 1-216-306-11 METAL CHIP 3.9 5% 1/10W
(US, 5E, 6E, 8E)
R601 1-217-905-11 RES, CHIP 1.5 5% 1/10W
(EE, E, MX, AEP)
R602 1-216-309-00 METAL CHIP 5.6 5% 1/10W
(US, 5E, 6E, 8E)
R602 1-217-905-11 METAL CHIP 1.5 5% 1/10W
(EE, E, MX, AEP)
R603 1-216-046-00 METAL CHIP 750 5% 1/10W
(US, 5E, 6E, 8E)
R603 1-216-045-00 METAL CHIP 680 5% 1/10W
(EE, E, MX, AEP)
< VARIABLE RESISTOR >
RV301 1-223-609-21 RES, VAR, CARBON 10K/10K
RV601 1-241-028-11 RES, ADJ, CARBON 330
< SWITCH >
S302 1-571-986-11 SWITCH, LEAF (POWER)
S303 1-692-298-11 SWITCH, SLIDE (TAPE SEL)
S304 1-692-299-11 SWITCH, SLIDE (FM/AM TAPE)
S305 1-692-898-11 SWITCH, SLIDE (AVLS)
< TRANSFORMER >
T1 1-404-949-11 TRANSFORMER, IF
< THERMISTOR(POSITIVE) >
THP601 1-809-279-11 THERMISTOR, POSITIVE
THP602 1-810-764-11 THERMISTOR, POSITIVE
< VIBRATOR >
X1 1-577-091-11 OSCILLATOR, CRYSTAL (19kHz)
X2 1-567-097-61 FILTER, CERAMIC (10.7MHz)
************************************************************
MISCELLANEOUS
**************
L1 X-3371-847-1 ANTENNA SUB ASSY, BAR
HP901 1-500-115-11 HEAD, MAGNETIC (PLAYBACK)
M901 1-698-353-13 MOTOR, DC (REEL/CAPSTAN)(WITH PULLEY)
************************************************************
ACCESSORIES & PACKING MATERIALS
********************************
1-505-521-11 HEADPHONE (MDR-023) (US, E, EE, 8E, AEP)
8-953-224-90 HEADPHONE (MDR-E802) (5E, 6E, MX)
3-346-518-01 CLIP, BELT
3-860-407-21 MANUAL, INSTRUCTION (ENGLISH) (US, EE, E)
3-860-407-31 MANUAL, INSTRUCTION
(SPANISH, PORTUGUESE) (5E, 6E, 8E, MX)
3-860-407-61 MANUAL, INSTRUCTION
(ENGLICH,POLISH,GREEK,THAI,CZECH,
BRAZILIAN,HUNGARIAN,RUSSIAN)
(AEP)
MAIN
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
— 22 —
WM-FX141
Sony Corporation
Personal Audio Company 99D1644-1
Printed in Japan © 1999.4
Published by General Engineering Dept.
9-923-296-12
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TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
WM-FX141
US Model
E Model
East European Model
Chinese Model
SERVICE MANUAL
SUPPLEMENT-1
File this supplement with the Service Manual.
Sony Corporation
Personal A&V Products Company
98H16084-1D
Printed in Japan ©1998.8
Published by Quality Engineering Dept.
(Shibaura)
9-923-296-81
Subject : Chinese Model Addition
• The chinese model is the same as the mexican model except for the following parts.
Mexican Model Chinese Model
3-860-407-31 MANUAL, INSTRUCTION
(SPANISH, PORTUGUESE)
Page
DIFFERENT PARTS LIST
Part No. Description Remarks
Part No. Description Remarks 3-860-407-42 MANUAL, INSTRUCTION
(ENGLISH, CHINESE)
21
1998. 08
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TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
WM-FX141
US Model
E Model
East European Model
Chinese Model
SERVICE MANUAL
SUPPLEMENT-2
File this supplement with the Service Manual.
Subject : Main board modified (US model)
1-673-769-12
NEWTYPE IDENTIFICATION
[MAIN BOARD] (Component Side)
1999. 05
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TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
— 2 —
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1 620kHz
CT1 1,400kHz
TUNER SECTION
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L4 505kHz
CT4 1,750kHz
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1 455kHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L2 86.0MHz
CT2 109.5MHz
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L3 86.0MHz
CT3 109.5MHz
0 dB = 1 µV
• Repeat the procedures in each adjustment several times for the
maximum level meter indication.
• The frequency coverage and tracking adjustments should be
finally done by the trimmer capacitors.
• US Model (Refer to pege 7)
FM antenna terminal
Adjustment Location : Main board
(Conductor side)
CT2
FM Tracking
Adjustment
CT3
FM Frequency
coverage
Adjustment
L3
FM Frequency
coverage
Adjustment
L1
AM Tracking
Adjustment
L4
AM Frequency
coverage
Adjustment
CT4
AM Frequency
coverage
Adjustment L2
FM Tracking
Adjustment
CT1
AM Tracking
Adjustment
T1
AM IF
Adjustment
SECTION 1
ELECTRICAL ADJUSTMENT
(Component side)
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
WM-FX141
SECTION 2
DIAGRAMS
2-1. BLOCK DIAGRAM 2-2. IC BLOCK DIAGRAM
— 3 — — 4 — — 5 — — 6 —
Note on Schematic Diagram:
• 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 Ωand 1/4W or less unless otherwise
specified.
•¢: internal component.
•U: B+ Line.
•H: adjustment for repair.
• Power voltage is dc 3V and fed with regulated dc power
supply from external power voltage jack (J301) .
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
( ) : PB
• Voltagesare takenwith aVOM(Input impedance 10MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
• Signal path.
F: FM
f: AM
E: PB
FM IN
RF GND
AGC
GND2
TU-IND
ST-IND
QUAD
1
2
AM L/CUT
AM/FM MIX
3
4
5
VCC2
AM IF
FM IF
6
7
8
9
10
11
12
LPF1 M/XST
L-OUT
R-OUT
13
14
15
AM OSC
FM OSC
RF VCC
FM RF
AM IN
20
21
22
23
24
DET OUT
AFC
18
19
LPF2 AM/XFM
MPX IN
16
17
FM
IF
FM
RF
FM
IF
AM
IF
AF
FM DET LEVEL
DET ST/MO
FM/AM
TUNE
LED
FM
MUTE
ST
LED
AM DET
FM OSC
AM OSC
FM MIX
AM MIX AGC
VCO
DIVIDE
DECODE
IC1TA2111F-EL
IC301
28
L
R
M
2
1
23
8
18 17
12 6
T1
AM IF
CF1
CF2
425 RV301
VOLUME
HP901
PLAYBACK
HEAD
M901
REEL/CAPSTAN
MOTOR
5
24
6
18
9
2
↓
↓
1
OFF
14L OUT
13R OUT
FM/AM MIX
AM OSC
FM OSC
FM RF OUT
AM RF IN
FM RF IN
AUDIO AMP
MOTOR DRIVE
IC1
FM/AM,RF/AF AMP
J302
J301
• Signal path
DC IN 3V
Q301
PHONES
SWITCH
Q302
AM/FM SELECT
SWITCH
S305
AVLS
S302
POWER
S303(2/2)
BPF CP1
DX → LOCAL
16
13
23 22 20
8
19
17
RV601
TAPE SPEED
+
–
S303(1/2)
(TAPE SEL)
CrO2/METAL ← NORM
S304
(FUNCTION)
FM → AM → TAPE
AM IF IN
FM IF IN
VCC2 16
LP2
10.7MHz
7
L2
FM
TRACKING CT2
CV2
X2
QUAD
DET OUT MPX IN
L3
FM
FREQ.
COVER CT3
CV3
20
L4
AM
FREQ.
COVER
CT4
CV4
24
L1
AM
TRACKING CT1
CV1
22
VCC1
21
: FM
: AM
E: PB
DX/LOCAL
SWITCH
Q1
Note on Printed Wiring Board:
•X: parts extracted from the component side.
•Y: parts extracted from the conductor side.
•®:Through hole.
•b: Pattern from the side which enables seeing.
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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
http://www.xiaoyu163.com
WM-FX141
2-3. PRINTEDWIRING BOARD
— 7 — — 8 — — 9 — — 10 —
12
A
B
C
D
E
F
G
H
I
34567891011121314151617181920212223242526272829
1
24
5
20
10
15
12
13
+
1
16
+
CV1-4
TUNING
Ref. No. Location
IC1 E-25
IC301 D-21
Q1 C-27
Q301 F-21
Q302 H-27
• 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
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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