Sony WM-EX50 User manual

WM-EX90/FX90
SERVICE MANUAL
WM-EX50
TABLE OF CONTENTS
GENERAL: . westecsstinpiessiniiocntetcncetasanueiaenenaarmnes 2- 6
Messages, warnings and tipS.........ccsssccccessessseeeeeees 2
Test equipment, Jigs and material .................006 3
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Location and function of controls ...................0ee 4
User’s instruction (WM-EX50 only) .............. 5- 6
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LCD BLOCK INFORMATION(WM-EX50 only).... 8
Data code chart and indication mode ................. 8
BLOCK. DIAGRAMS xeiisssct sasccnssmunsacchietearlinss ees 9-10
SCHEMATICS AND BOARD DIAGRAMS ....... 11-19
Semiconductor layouts ...........cccccsssssssecceeeeeeeeeeenes 14
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SPARE PARTS LIB DE ncdGuteecokecetitiaiacs 20-28
Exploded views and mechanical parts............ 20-22
Electrical parts cctusctascnctiicenitiaciintivacewsn 23-28
ADUOSTIMERINGS: sites. dsSieoessaints ceuurelstecbentetedecaines 29-32
Mechanical measurements ...........ceeeeeseeeeeeeeeeneeees 29
Mechanical adjustments ...............ceeeeeeeseseeneeeeeeeeee 29
Electrical alignments ........cccesscceseeeeeeeeeeeetees 30-32
Adjustment location s...cicccccicccasscnvsessicnorersseness 29-30
SPECIE IC A TIONS s.fius pe coccedecteadeceeccinusavedsvsperasniohs 34
US Model
AEP Model
E Model
WM-EX50/FX50
UK Model
WM-EX50
Canadian Model
WM-FX50
WWN-FX50
WM-EX50 : MT-WMEX50-01
Tape Transport
Mechanism
WM-FX50 : MT-WMFX50-01
Dolby noise reduction manufactured under license
from Dolby Laboratories Licensing Corporation.
*DOLBY” and the double-D symbol OO are trade-
marks of Dolby Laboratories Licensing Corporation.
CASSETTE PLAYER
WM-EX50
RADIO CASSETTE PLAYER
WM-FX50
SONY.

GENERAL
Messages, warnings and tips
CAUTION
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type
recommended by the equipment manufacturer.
Discard used batteries according to manufacture’s
instructions.
ADVARSEL!
Lithiumbatteri - Eksplosionsfare ved fejlagtig handtering.
Udskiftning ma kun ske med batteri
af samme fabrikat og type.
Lever det brugte batteri tilbage til leverand¢ren.
ADVARSEL
Lithiumbatteri - Eksplosjonsfare.
Ved utskifting benyttes kun batteri som
anbefalt av apparatfabrikanten.
Brukt batteri retuneres apparatleverand¢ren.
VARNING
Explosionsfara vid felaktigt batteribyte.
Anvand samma batterityp eller en ekvivalent
typ som rekommenderas av apparattillverkaren.
Kassera anvant batteri enligt fabrikantens
instruktion.
VAROITUS
Paristo voi rajahtaa, jos se on virheellisesti asennettu.
Vaihda paristo ainoastaan laitevalmistajan suosittelemaan
tyyppiin. Havita kaytetty paristo valmistajan ohjeiden
mukaisesti.
SAFETY-RELATED COMPONENT
WARNING!!
COMPONENTS IDENTIFIED BY MARK A\ OR
DOTTED LINE WITH MARK /\ ON THE
SCHEMATIC DIAGRAMS AND IN THE PARTS
LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY
PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT
RAPPORT A LA SECURITE!
LES COMPOSANTS IDENTIFIES PAR UNE
MARQUE /\ SUR LES DIAGRAMMES SCHE-
MATIQUES ET LA LISTE DES PIECES SONT
CRITIQUES POUR LA SECURITE DE FONCTION-
NEMENT. NE REMPLACER CES COMPOSANTS
QUE PAR DES PIECES SONY DONT LES
NUMEROS SONT DONNES DANS CE MANUEL OU
DANS LES SUPPLEMENTS PUBLIES PAR SONY.
Precautions
Notes on battery
* Romove the battrey when you will not use the unit
for a long time to prevent damage from battery
leakage and corrosion.
* When the sound becomes unstable, try a new
battery.
External power sources
The following external power sources can be con-
nected through the DC IN 1.5V jack.
* House current using an AC-E15L AC _ power
adaptor.
The illustration shows the polarity of DC IN 1.5V
jack. Use only a power cord having the same polarity.
oy,

Test equipment,Jigs and Material
Test equipment
Digital multimeter
FM RFF signal generator
AM RF signal generator
Stabilized power supply
Speed checker
Wow and Flutter
Frequency counter
VTVM
Spectrum analyzer
SONY Digital tuning radio ICF-2001 or equivalents
Feature
¢ Double Super heterodyne FM receiver for
WM-F X50
The FM receiver is used the double super hetero-
dyne system which is superior in FM sensitivity and
image sprious rejection.
System comparison chart
| WM-FX50 WM-F702
Doubl Sing]
a3 ouble super ingle super
BC Systm heterodyne (FM) | heterodyne
Detector Double pulse count | Quadrature
AM IF 55kHz 450kHz
28.6MHz (1st IF) 10.7MHz
EMR 150kHz (2nd IF)
Filter element __| Monolisic Ceramic
Method of calculation
NOTE: fs = Tuned frequency
* FM local oscillator frequency
1st stage local oscillator frequency (fo)
(cad (284 = OSC )
[For Example]
Tuned at 100MHz
— 150kHz
57.5
fo = 100 + a) — 150kHz = 128.6MHz
2nd stage local oscillator frequency
57.5MHz (fixed)
Jigs
Test tape Part Number
- WS-48A (3kHz, 0dB) 7-819-032-11
Cassette type torque meter
- CQ-102C (normal direction) 8-909-708-22
- CQ-102RC (reverse direction) 8-909-708-26
- CQ-201B (FF and REW) 8-909-708-41
Cassette type Tension meter
- CQ-403A (normal direction) 8-909-708-92
- CQ-403R (reverse direction) 8-909-708-95
Screw locking compound
Neji lock G (1401B) 7-432-114-11
Greases and Oil
Machine oil Hydro Fruid NT-68 7-661-018-18
Sankol FG-84M 7-662-001-36
* FM image frequency
foil = fs +( S13MHa = 150kH2) x 2
pi oro
[For Example]
Tuned at 100OMHz
foil = 100MHz + ( SEM = 150k) x2
+ 150kHz = 28.9MHz
= 157.2MHz
foi2 = 28.9MHz (Fixed)
* AM local oscillator frequency (fo)
fo = (fs + 55kHz) X 2
[For Example]
Tuned at 1000kHz
fo = (1000kHz + 55kHz) X 2 = 2110kHz
* AM image frequency (foi)
fol = fs + 55kHzX 2
[For Example]
Tuned at 1000kHz
foi = 1000kHz + 55kHzX 2 = 1110kHz

Location and Function of Controls
DIR
To listen to the other side of the tape ~
MEGA BASS
Listening to powerful and heavy sound
Set MEGA BASS to the desired position. aon.
Bass is boosted in the order of NORM, MID and (C ]
MAX.
oes
MAX MID NORM
While playing back hard and stressed sound with MEGA BASS set to
MAX, the sound may be distorted. In this case, set MEGA BASS to
NORM or MID.
DOLBY NR
Getting the best performance from your tape
For Dolby NR processed tapes
[IMW-FX50_ONLY|
LOCAL enna) Ox FM SENS
For normal reception ~
—
If a very strong station signal causes noise Loca, CLES OF FM SENS
The noise will be reduced. —
<< / >>
To wind the tape rapidly
m@ STOP
To stop the tape
MODE
On playback operation
When the playback starts from the reverse side
of the cassette, the unit will be shut off at the end
of that side.
Playing back both sides of the cassette once
MODE Ce 0D
Playing back both sides of the cassette hmm
repeatedly CO |
MODECD* *~)D
woe
METAU ** NORM
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For normal (TYPE |) tapes
For CrOz (TYPE II) or metal (TYPE IV) tapes
METALS ** NORM
CO,
TAPE
RADIO CEM MONO TAPE ARO
For normal reception
=o
RADIOL EMMONS TAPE Huot
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lf it is hard to hear the broadcast due to noise, the
noise will be reduced.
In this mode, there is no stereo effect. ae

User’s Instruction
Setting the Cl ck
Before setting the clock, be sure that the clock indication appears in
the LCD display window.
Ex: Tosetto 1:15p.m.
1 Press the OPEN button.
2 Press the CLOCK button for 1.5 seconds or more.
3 Set the hour.
Press the + button repeatedly until you get the desired setting.
4 Press the CLOCK button.
5 Set the minute.
Press the + button repeatedly until you get the desired setting.
6 Press the CLOCK button.
Notes
© The hour display is in the 12-hour system.
* If you keep pressing the + button, the digits advance in sequence.
¢ The hour display does not advance even when the minute indication returns
to “00” after ‘'59”’.
To change the hour only
Follow steps 1 - 3, then press the CLOCK button twice. (During this operation
the minutes and the seconds do not advance.)
To change the minute only
Follow steps 1 - 6 but skip step 3.
(During this operation the seconds advance.)

Inserting a Lithium Battery
With the + (plus) mark facing out
Avec le repére + (plus) vers l’ex-
térieur
Con la marca + (positiva) hacia
afuera
Como 0 lado + (positivo) voltado
parao exterior.
Note
If the lithium battery compartment lid is detached
by an accidental drop, etc. attach it as illustrated.
Before operation, be sure to install a lithium battery (supplied). With the lithium battery
installed, this unit powers the clock and displays the tape operation indications in the
LCD display window during the tape playback.
Lithium battery life
Approximately one year and a half in normal operation.
if the lithium battery becomes weak, the letters on the display will become indistinct. In
this case, replace the battery with a Sony CR2025 lithium battery. Use of another
battery may cause a risk of fire or explosion. After replacing the battery, reset the clock.
Cautions
* Keep the lithium battery out of the reach of children. Should the battery be
swallowed, consult a doctor immediately.
* Before use, wipe the battery with a dry cloth to assure a good contact.
¢ Be sure to observe the correct polarity when installing the battery.
* Do not hold the battery with metallic tweezers, otherwise a short-circuit may
occur.
* Do not break up the battery or throw it into a fire because it may explode. Carefully
dispose of the used batteries.
Warning
Battery may explode if mistreated. Do not recharge, disassembie or dispose of in
fire.
Service Notes
How to check the operation
When audio board has been removed from mechanical
deck. Depress the PLAY (®) button to turn ON the
S901 (POWER) and S902 (PLAY).
AUDIO BOARD - Component side -
$902
(PLAY)
5901 (POWER)
Wide mouth clip
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 con-
ductor 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 damaged by heat.

REMOVAL
Note : Follow the disassembly procedure the numerical order given.
Tuner unit (WM-FX50)
@ SCREW (M1.4x 2)
@ SCREW (M1.4X 2)
) COVER
TUNER UNIT
CASSETTE LID ASSY
TUNER FLEXIBLE BOARD
(By soldering iron)
@ KNOB
(FUNCTION)
To take off the tuner unit from cassette lid ass’y.
Warm up @ to @ portion by heater and move it slowly by tweezers.
HEATER
Tweezers
Both sides adhesive sheet

LCD BLOCK INFORMATION
Clock operation
LCD will operate as a clock indication with the
following conditions.
1. When the data code 0000 or 0100 feed into input
port. (data code show in chart 1)
2. When the dry penlight battery (AM3/LR6) or
Ni-Cd battery is not built- in the battery case.
Refer to User’s instruction ’Setting the clock” page 5.
Tape running indication
LCD will operate as a tape running indication mode
when it assembled the data code of chart 1.
* PLAY (FWD) - FF (FWD)
» PLAY (RVS) - FF (RVS)
- REW (FWD)
brink
» REW (RVS)
* Error indication mean’s to notified to the customer
that it is abnormal operation when pushing the MD
button in same time.
* The clock will be reset and indicate AM 12: 00 after
all indicator is light.
Indicator is clock mode when rethium battery take
off.
Data code chart and indication mode

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ge: P
Bn_| -o-
: CA
ANODE THODE
cet
ir
MA8120
AM
9
MA110
z
cobs
MA729
—-e—-
C CATHODE
Note on Schematic Diagram :
« All capacitors are in uF unless otherwise noted. pF: uu F
5OWV or less are not indicated except for electrolytics
and tantalums.
* All resistors are in Q and %4W or less unless otherwise
specified.
. : B+ Line
ae:
‘C_]
:
adjustment
for
repair.
GOEADy
aotX
*
Power
voltage
is
dc
1.3V
and
fed
with
regulated
dc
power
supply from external power voltage jack.
« Voltage and waveforms are dc with respect to ground
Note on Printed Wiring Boards : under no-signal (detuned) conditions.
no mark : FM
» Voltages are taken with a VOM (Input impedance 10M @).
Voltage variations may be noted due to norma! produc-
tion tolerances.
EEL EE ESS BS
* BW =: parts mounted on the conductor side.
: Pattern on the side which is seen.
+ Signal path.
o> :FM
Sg
aa

WM-EX50/FX50
Audio Board Schematic Diagram
“7
Dee
2
3
9
10
1
s) 16
006 | aT
i ee
[-co wae BLE]
ficcd BLOOK
[LCD BLOCK]
LCD
DISPLAY PANEL,
LIQUID CRYSTAL
MSM5052-132
CLOCK/LCD DRIVE
THIS UNIT IS
SUPPLIED AS THE
ASSEMBLED BLOCK
TMS0 10
BATTERY '
(BACK UP)®
LITHIUM
cR2016 O| 4
2.BV
TM502
|
|
|
(
|
|
|
a
Note:
* All capacitors are in uF unless otherwise noted. pF :
BATTERY
o +
1
1 WM-FX50 {
i (See page 2) (A)TUNER BOARD H
‘ t
H t
1‘ Sy: H aa Je
—— TUNER FLEXIBLE]
i Rech Lch GND +B 86BS ANT | t BOARD
H t
Se 19 0 5 0 ! e
t
$302 { ‘ Poecsraeeses
[AUDIO BOARD] Moses es, piDeeteente Pee) enon einer Reeeeren ee een Nee tee J PWM-FxBO ft i
DOLBY NA leaoa A
|
ON-OFF
|
s00r
|
= {4p 4 ear '
| | RRA iL Beene H
( ic301| TA7795FN
PRE
AMP
WM-F
X50
1
J304
:
F
-
1
134
H.P
JACK
°
!
“8
AC2106M
tpgo2
}
A310
R107
68K
wv
aN
x
MEGA BASS
a
1MA728
}
330K
G806,B07
ae08
t
C)
C105
°
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enh
o
een
25D1819A
Sees
ii
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|
15/4V
1C
3
0
2
Bebe
°
bd
“8
TREY.
aeit8,
MUTE
(RADIO
TA7793FN
m
oF
IC
304)
Pa
HEAD
!
DOLBY
NA
3
-
ESAS
SoM
:
ag
>
rot
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H
pal m
SK
OO
R103
“6
AV304
POONER
iAP
L304
8.2#H
ata
4K
of
10K/40K
ane
rc oo
c
())
4
[VOLUME]
L201
8.2#H
H
0 301 0.8 wae
. WM-FX50
Ny pavcedemacs: omen nnntennennseme nana {
se
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ious
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Fact ont : ! ABOS O01 PLAY: '
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100K
27K
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sox
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\
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; a305 ¥ re x
WDD 2581218 cere R216 a . 7 | tH
— VREF > 4,.772,.5V 39K > T2% : x
a301
a
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7
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s|
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SWITCH
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te
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TUNER ON?0 28D1B19A 28B1218A tio O
)
‘OFF
10,7
—
MUTE
(DIR)—
i
A
=
|| ae 1 =
gt
SP
Sees
es
—
Lis
FWD/RAVS v T_|
1 1 s904
thew
Seceeeecnsnnannaannnaunwa
cease
cman
ena
boewebacet
einen
cnaceseocasassasdeudecesessosesanassanssbacdececocandnccnsesncesvcessescuceidnciescecndéccnacedesanidudee
Jen
WM-EX50
8701
oy
Sor:
4
\
M904
Ee ] DC MOTOR
DIR MODE
OS ED SS LS SSNS TEES OLSSON SOROS RODEO EEE Rema w meen:
HEF
SOWV or less are not indicated except for electrolytics
and tantalums.
: All resistors are in Q and “%W or less unless otherwise
Es
specified.
: B+ Line
. [_]} : adjustment for repair.
Total current is measured with no cassette installed.
Power voltage is de 1.3V and fed with regulated dc power
supply from external power voltage jack.
Voltage and waveforms are de with respect to ground
under no-signal (In playback mode) conditions.
no mark : FWD
WM-EX50 1} LED SWITCH
1
'
me mn wen ones wnseenoeneseneoweonccenl
+ Voltages are taken with a VOM (Input impedance 10M).
Voltage variations may be noted due to normal produc-
tion tolerances.
* Signal path.
=> :FM S>:PB
x
poomeeponnnnneny ar
°
H
4
o
(0°
ae
“4
Oo OK ©
} m n S 0.04 ry -
ee Paes of 0.5
2 H 4 2 Gov la
x , c c o}o <4 La
WW !
2S8121BA £ H
PLAY MODE uw ' o Ze agi see
rs trol 3H x SERVO
to- Ea) ° “
tokio Ho
1 Zu 1G? ow s
7 {oo <a
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x fa) ' ti
R @703 ' g 2.2K
C
UN5214
i
5
ae
TTT
PLAY MODE L
8 PLAY1.3 2.2/50V csog 4.7K
ss a4o2 4,7/2.5V
R6O5 1K
OFF: 4
“TUNER ON:O
2
3
'
|
Nae ee ee ee ee oe ee te eee ee RSIS a: aeons =
4 £97 00
e 2 Se ee
Zk
DRY BATTEAY
ou @ SIZE'AA'
x (IEC DESIGNATION A6)
Wo TOTAL CURRENT 10 4PCS 4.5V
5 TAPE EWD!440mA
- AVS: 140mA or RECHARGEBLE
Z REW:!SOmA \ eens
RADIO FM:50mA ae
AM: 50mA L.2Vx4
t
legend CN304
,
XN4246 | DG IN.1.5Y
' Ceo
ABiO. Ut a
2.2K t \ th
WA MIEXS5O} ua 7)
nm
oO

| WM-EX50/FX50
Audio Board Printed Wiring Boards
6
t
8
9
10
11
42 13
Semic
nduct
r
Locati n
CN301
a
$304 TAPE $302 [DOLBY NR
NORM -———> HETAL/CtO2 OFFe— ON
RECHARGEBLE
BATTERY
NC-6WM
1.2VK4
DRY BATTERY
SIZE “Aa”
(IEC DESIGNATION Ré)
APCS , 1.5V
|
—
[LCD BLock)] Wy
|
a
s
|
|
THIS
UNIT
IS
xO
as
,
|SUPPLIED
AS
Lu
Si
fee
it
ai
| THE Lo a
|
|
ASSEMBLED
at
sla
BLOCK Q g
a
ao
M901
DC MOTOR
©
WM-EX50 : - “Fh 4 x aha 3 Pace!
es | a ae a 0 Cera Eel a Poe WEL S| bel gle oe : \ MLM
| WM-EX80
(See page 13)
TUNER
BOARD
[Meas
FLEXIBLE
| . BOARD
TUNER yg
FLEXIBLE
i
BOARD oo : was A m304
le den iene EP ae ea Peed : | aay ee Ge Cae or a)
| ome] : =~ : | z HEAD FLEXIBLE
BOARD
a HP901
= PB HEAD
) REF~A_S
ZF avi
pL ( \ReNoTeeNscas
Note:
: parts mounted ‘on the conductor side.
: Through hole.
: Pattern on the side which is seen.
: Pattern of the rear side.
—4f7— | : — 18 —

IC layouts
16301
TA7795F
16304
LA4538M
NFS-A
=6OUT-A)
(DAV-A
GND
DRV-8
«OUT-8
«NFB-8
0
N/H
get
ouT-!
gry
OuT-2
vec
8
ASE osc
34 sy 1, | nal
MUTE
7 - »
oe
FILTER
ety
C) Q)—-—G) )—~()-——-@)
2 REF
a eee |
an
RF-IN = -RF-OUT
Vee F-IN-A R-IN-A Viner F-iN-8 R-IN-8 iis F/R POWER IN-1 PRE Ne
SWITCH
IC302 TA7793F
8 B
B-IN EK-IN OQUT-B SC-IN HPF-8 LPE-B Sw Vee
LPF-A = VreF
1C601 LB1672M
COM- Vsp IN+ OUT RI osc GND PV DV V PU _| DU
a
eae.
ihe ——
SPEED |=. = | nm pe ee
(ee UR) NE ON A GS EES
START
Vref
OUT1
IN14
IN2
DR
Vec
W
DW
PW
U
DU

SPARE PARTS LIST
Exploded Views and Mechanical Parts
NOTE:
—XX, —X mean standardized parts, so
they may have some differences from
the original one.
The construction parts of an assembled
part are indicated with a _ collation
number in the remark column.
CABINET
Q (including A)
Color indication of Appearance Parts
Example :
KNOB, BALANCE (WHITE)....(RED)
t i)
Parts color
Cabinet's color
Ref.No.
Part
No.
Description
Remark
Ref.
No.
Part
No
1
3-704-197-61
SCREW
(M1.
4X4.
0),
LOCKING
12
X-3352-013-1
2
3-704-197-11
SCREW
(M1.
4X2.0),
LOCKING
13
3-357-914-01
3
3-342-380-01
SHEET,
SPEED
HOLE
(BLACK)
14
3-352-050-01
3
3-368-118-01
SHEET,
SPEED
HOLE
(GRAY)
19
3-352-047-01
4
3-704-197-31
SCREW
(M1.
4X3.0),
LOCKING
16
3-352-049-01
7
3-367-812-01
5
X-3362-867-1
CABINET
(REAR)
ASSY
(BLACK)
(FX50:AEP,
E)
5
X-3362-872-1
CABINET
(REAR)
ASSY
(BLACK)
(EX50:AEP,
E)
18
3-367-803-01
5
X-3362-875-1
CABINET
(REAR)
ASSY
(GRAY)
(EX50)
18
3-367-803-11
5
X-3362-870-1
CABINET
(REAR)
ASSY
(GRAY)
19
3-367-801-01
5
(FX50:US,
Canadian,
E)
20
A-3016-050-A
20
A-3016-055-A
6
3-352-045-01
KNOB
(TAPE)
1
3-348-186-01
KNOB
(DBB)
21
1-638-316-11
8
3-367-795-01
COVER
(FX50)
22
3-318-382-561
23
1-809-282-11
g
X-3362-868-1
LID
ASSY,
CASSETTE
(BLACK)
(FX50:AEP,
E)
g
X-3362-873-1
LID
ASSY,
CASSETTE
(BLACK)
(EX50:AEP,
E)
24
3-367-802-01
9
X-3362-874-1
LID
ASSY,
CASSETTE
(GRAY)
(EX50)
25
1-638-314-11
g
X-3362-871-1
LID
ASSY,
CASSETTE
(GRAY)
(FX50:E)
g
X-3363-078-1
LID
ASSY,
CASSETTE
(GRAY)
26
A-3016-049-A
(FX50:US,
Canadian)
26
A-3016-051-A
27
3-367-804-01
10
3-367-791-01
KNOB
(LOCAL/DX)
28
3-347-289-01
14
3-704-197-01
SCREW
(M1.
4X1.
6),
LOCKING
29
*
3-368-117-01
ee
ae
as
of
this
parts
list.
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.
e@ Hardware(#mark) list is given in the
ARM ASSY, CLICK
TERMINAL BOARD, MINUS
HOLDER (B), TERMINAL
TERMINAL BOARD, PLUS
HOLDER (A), TERMINAL
ORNAMENTAL, REEL
LID, BATTERY CASE (GRAY)
LID, BATTERY CASE (BLACK)
PLATE, BLIND (EX50)
TUNER BOARD, COMPLETE (FX50:AEP, E)
TUNER BOARD, COMPLETE (FX50:US, Canadian)
FLEXIBLE BOARD, TUNER (FX50)
SCREW (1. 7X2.5), TAPPING (EX50)
DISPLAY PANEL BLOCK, LIQUID CRYSTAL
(EX50)
LID (LITHIUM), BATTERY CASE (EX50)
PC BOARD, LCD FLEXIBLE (EX50)
AUDIO BOARD, COMPLETE (FX50)
AUDIO BOARD, COMPLETE (EX50)
SPRING, CASSETTE RETAINER
SHEET (COVER) (FX50)
SPACER

TAPE TRANSPORT (1)
ee : iE oi
WM-FX50 : MT-WMFX50-01
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
301 3~348-998-31 SCREW (M1. 4X2. 5), TAPPING, PAN 321 X-3348-110-1 LEVER ASSY, PICK UP
302 3-344-693-01 GUIDE (LEFT) 322 3-349-814-01 BELT
303 «=. 3-3 41-468-01 SPRING (R) 323 3-354-494-01 SPRING (S$ REEL), COMPRESSION
304 3-354-420-01 SPRING (PINCH RK), TORSION 324 3-348-149~01 REEL, SUPPLY
305 3-341-473-01 WASHER (MP) 325 3~348~150-01 REEL, TAKE-UP
306 X-3331-035~-1 PINCH LEVER (R) ASSY 326 3~352-010-01 COVER (X), MD
308 3-345-725-01 LEVER (AZ), HEAD 326 3-354-467-01 COVER, MD
309 3-347-205-01 SPRING (HD LEVER), TORSION 327 3-354~407-01 WASHER
310 3-365-356-01 WASHER 328 3-367-362-01 BUTTON (REW)
311 3-348-998-71 SCREW (M1. 4X4, 5), TAPPING, PAN 329 3-367-363-01 BUTTON (STOP)
312 X-3331-036-1 PINCH LEVER (N) ASSY 330 3-367-361-01 BUTTON (FWD)
313 3-354-421-01 SPRING (PINCH NK), TORSION 331 3-367-359-01 BUTTON (OPEN)
314 3-341-469-01 SPRING (N) 333 3-354-448-01 SCREW (TOOTH)
315 3-352-005-01 SCREW (M1. 4X1. 6), PRECISION STEP 334 1-638-313-11 PC BOARD, MOTOR FLEXIBLE
316 X-3352-009-1 HOLDER (X) ASSY (EX50) 335 3-344-694-01 GUIDE (RIGHT)
316 X-3362-810-1 HOLDER (S.7) ASSY (FX50) 336 3-367-360-01 BUTTON (FF)
317 3-348-989-01 SPRING, COMPRESSION
318 3-352-098-01 WASHER, STOPPER HP904 1-543-812-11 HEAD, MAGNETIC (PLAYBACK)
319 3-348-151-01 GEAR (TAKE-UP REEL) M301 1-541-660-11 MOTOR
320 X-3352-007-1 WHEEL (X) ASSY, CAPSTAN

TAPE TRANSPORT (2)
361
362
363
365
366
Part No.
3-348-101-01
$-348-156-01
3-364-971-01
3-348-102-01
3-348-105-01
3-348-163-01
3-352-002-02
3-348-953~11
3-352-032-01
3-3 48-996-01
3-3 48-172-03
3-352-007-01
X-3352-027-3
3-354-470-01
3-348-159-01
3-352-021-01
Description
RATCHET
LEVER, DIR (MADE IN JAPAN)
LEVER, DIR (MADE IN CHINISE)
BUSHING
LEVER, MODE SELECTION
SPRING, TENSION
LEVER (X),
WASHER
GEAR (X),
WASHER
SPRING
TRIGGER
CAM
(S. OFF), TORSION
PULLEY
CLUTCH
(MIDWAY. X)
(X) ASSY
PULLEY (REVERSE X. T)
SPRING (NR), TORSION
GEAR (N. X)
359
313
317
378
319
380
362
359 359
- Zs
366 Y
377
Part No.
3~352-028-01
X-3348-102-1
X-3362-240-1
3-348-162-01
3-348-103-01
3~348-160-01
X-3362-812-1
3-348-168-01
3-395-577-01
X-3362-811-1
X-3363-113-1
3-357-927-01
3-392-026-01
3-357-918-01
3-104-252-4]
7
sS
368
Remark
Description
LEVER (X), SW
LEVER ASSY, LOCK (MADE IN JAPAN)
LEVER ASSY, LOCK (MADE IN CHINISE)
SPRING (LOCK), TORSION
SPRING (PLAY), TORSION
SCREW (M1. 4X1. 3), PRECISION PAN
LEVER (X) ASSY, FF
SPRING (FR), TORSION (MADE IN JAPAN)
SPRING (FR), TORSION (MADE IN CHINISE)
LEVER (X) ASSY, REW
CHASSIS (X) COMP ASSY
WASHER
SPRING, TENSION
GUIDE (BELT)
SCREW (M1. 4X6)

Electrical Parts
NOTE:
Due to standardization, replacements in
th 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
Items marked “*” are not stocked since
they are seldom required for routine
service. Some delay should be _ anti-
cipated when ordering these items.
SEMICONDUCTORS
In each case, u: yu, for example:
the original one. UA....: wA...., UPA....: uPA...
@ RESISTORS uPB....: «PB...., uPC....: #PC....
All resistors are in ohms uPD....: «PD....
METAL : Metal-film resistor CAPACITORS
METAL OXIDE : Metal Oxide-film resistor uF: uF
F: nonflammable COILS
uH: nH
Ref. No. Part No. Description Remark Ref.No. Part No.
A-3016-049-A AUDIO BOARD, COMPLETE (FX50) C206 1-164-346-11
A-3016-051-A AUDIO BOARD, COMPLETE (EX50) C207 1-164-174-11
KREAERRAAE EERE EERE EARAEE RES C208 1-135-208-11
C209 1-162-970-11
$-352-047-01 TERMINAL BOARD, PLUS C210 1-135-192-21
3-352~-049-01 HOLDER (A), TERMINAL C211 1-162-967-1i
3-352-050-01 HOLDER (B), TERMINAL
3-357-914-01 TERMINAL BOARD, MINUS C212 1-135-218-11
C213 1-162-961-11
< CAPACITOR > C214 1-162-968-11
C215 1-126-603-11
C101 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V C216 1-162-963-11
C102 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V
C103 1-163-989-11 CERAMIC CHIP 0.033uF 10% 25V C217 1-164-156-11
C104 1-164-173-11 CERAMIC CHIP 0.0039uF 10% 50V C218 1-126-608-11
C105 1-135-158-21 TANTALUM CHIP 15uF 20% 4V C219 1-162-964-11
C304 1-135-219-11
C106 1-164-346-11 CERAMIC CHIP uF 16V C302 1-162-964-14
C107 1-164-174-11 CERAMIC CHIP 0.0082uF 10% 25V
C108 {-135-208-11 TANTAL. CHIP = 1uF 10% 10V C303 1-164-346-11
C108 1-162-970-11 CERAMIC CHIP 0. OluF 10% 25V C304 1-135-158-21
C110 1-135-192-21 TANTAL. CHIP 0. 47uF 10% 20V C305 1~162-964-11
C306 1-126-193-11
C111 {-162-967-11 CERAMIC CHIP 0.0033uF 10% 50V C307 1-162-970-11
C112 1-135-218-1141 TANTAL. CHIP 4, TuF 20% 2. 5V
C113 1-162-961-11 CERAMIC CHIP 330PF 10% 50V C308 1-135-221-11
C114 1-162-968-17 CERAMIC CHIP 0.0047uF 10% 50V C309 1-126-590-11
C115 1-126-603-11 ELECT CHIP 4, TuF 20% 35V C310 1-135-202-2]
C311 1-163-833-00
C116 1-162-963-11 CERAMIC CHIP 680PF 10% 50V C312 1-135-221-11
Cli? 1-164-156-11 CERAMIC CHIP 0. 1uF 25V
C118 1-126-608-11 ELECT ~ 330urF 20% 2V C313 1-135-219-11
C119 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V C314 1-162-964-11
C201 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V C315 1-126-603-11
C316 1-126-590-11
C202 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V C317 1-162-$53-1]
€203 1-163-989-11 CERAMIC CHIP 0.033uF 10% 25V
6204 1-164-173-11 CERAMIC CHIP 0.0039uF 10% 50V C318 1-126-605-11
C205 1-135-158-21 TANTALUM CHIP 15uF 20% AV C320 1-126-608-11
C321 1-164-156-11
Description
CERAMIC
CERAMIC
TANTAL.
CERAMIC
TANTAL.
CERAMIC
TANTAL.
CERAMIC
CERAMIC
CHIP
CHIP
CHIP
CHIP
CHIP
CHIP
CHIP
CHIP
CHIP
ELECT CHIP
CERAMIC CHIP
CERAMIC CHIP
ELECT
CERAMIC CHIP
TANTAL. CHIP
CERAMIC CHIP
CERAMIC CHIP
TANTALUM CHIP
CERAMIC CHIP
ELECT
CERAMIC CHIP
TANTAL. CHIP
ELECT CHIP
TANTAL. CHIP
CERAMIC CHIP
TANTAL. CHIP
TANTAL. CHIP
CERAMIC CHIP
ELECT CHIP
ELECT CHIP
CERAMIC CHIP
ELECT
ELECT
CERAMIC CHIP
uF
0. 0082uF
luF
0. O1uF
0. 47uF
0. 0033uF
4, TuF
330PF
0. 0047 uF
4, TuF
680PF
0. tuF
330uF
0. OO luF
15uF
0. OO uF
luF
15uF
0. OO1UF
luF
0. O1uF
3. 3uF
22uF
22uF
0. 068uF
3. 3uF
15uF
0. OO tuF
4. TuF
22uF
100PF
22uF
330uF
0. luF
10%
10%
10%
10%
10%
20%
10%
10%
20%
10%
20%
10%
20%
10%
20%
10%
20%
10%
20%
20%
20%
20%
20%
10%
20%
20%
on
20%
20%
2. 5V
50V
25V
50V
2. 5V
00V
16V
d0V
90V
20V
4V
4V
AV
25V
4V
2. 5V
00V
36V
4V
20V
6. 3V
25V

Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
C322 1-164-156-11 CERAMIC CHIP 0. 1uF 25V < COIL >
C323 1-135-187-21 TANTAL. CHIP 2. 2uF 20% 4V
L101 1-412-005-11 INDUCTOR CHIP 8. 2uH
C401 1-135-201-1141 TANTALUM CHIP 10uF 20% = 4V L201 1-412-005-1411 INDUCTOR CHIP 8. 2uH
C402 1-164-156-11 CERAMIC CHIP 0. luF 25V L301 1-412-005-11 INDUCTOR CHIP 8. 2uH
C403 1-164-156-11 CERAMIC CHIP 0. 1uF 25V
C601 1-164-232-11 CERAMIC CHIP 0. OluF 50V < TRANSISTOR >
C602 1-126-601-11 ELECT 2. 2uF 20% 50V
0301 8-729-421-26 TRANSISTOR UN5216QRS
C603 1-126-601-1141 ELECT 2. 2uF 20% 50V 0302 8-729-402-32 TRANSISTOR 25D1819A-R
C604 1-164-232-11 CERAMIC CHIP 0. OluF 50V 0303 8-729-402-32 TRANSISTOR 2SD1819A-R
C605 1-135-187-21 TANTAL. CHIP 2. 2uF 20% 4V 0304 8-729-402-55 TRANSISTOR 2SB1218A-R
C606
1-164-232-11
CERAMIC
CHIP
0.
OluF
50V
0305
8-729-402-55
TRANSISTOR
2SB1218A-R
C607 1-135-187-21 TANTAL. CHIP 2. 2uF 20% 4V
0307 8-729-807-87 TRANSISTOR 25B1295-UL6
C608
1-164-346-11
CERAMIC
CHIP
uF
16V
0401
8-729-421-23
TRANSISTOR
XN1216
C609
1-135-218-11
TANTAL.
CHIP
4.
7uF
20%
2.
5V
0402
8-729-402-75
TRANSISTOR
XN5501
C701
1-135-219-11
TANTAL.
CHIP
15uF
20%
2.
5V(EX50)
Q701
8-729-402-55
TRANSISTOR
2SB1218A-R
(EX50)
C801 1-162-953-11 CERAMIC CHIP 100PF 5% 50V (FX50) 0702 8-729-421-26 TRANSISTOR UN5216QRS (EX50)
C803 1-162-970-11 CERAMIC CHIP 0. 01uF 10% 25V (FX50)
0703 8-729-421-26 TRANSISTOR UN5216QRS (EX50)
C804
1-162-970-11
CERAMIC
CHIP
0.01uF
10%
25V
(FX50)
0704
8-729-402-55
TRANSISTOR
2SB1218A-R
(EX50)
C805
1-135-201-11
TANTALUM
CHIP
10uF
20%
4V
(FX50)
0705
8-729-402-55
TRANSISTOR
2881218A-R
(EX50)
C806
1-164-156-11
CERAMIC
CHIP
0.
tuF
25V
(FX50)
0706
8-729-402-55
TRANSISTOR
28B1218A-R
(EX50)
0807
1-164-156-11
CERAMIC
CHIP
0.
luF
25V
(FX50)
Q707
8-729-421-26
TRANSISTOR
UN5216QRS
(EX50)
< CONNECTOR > 0801 8-729-421-23 TRANSISTOR XN1216 (FX50)
0806 8-729-402-32 TRANSISTOR 2SD1819A-R (FX50)
CN301
1-580-919~-11
JACK,
DC
(POLARITY
UNIFIED
TYPE)
0807
8-729-402-32
TRANSISTOR
2SD1819A-R
(FX50)
(DC IN 1. 5V) 0808 8-729-402-55 TRANSISTOR 2SB1218A-R (FX50)
< DIODE > 0809 8-729-402-32 TRANSISTOR 2SD1819A-R (FX50)
0401 8-719-976-16 DIODE GL2PR90 (BATTERY) < RESISTOR
D701 8-719-404-46 DIODE MA110 (EX50)
0802
8-719-421-27
DIODE
MA7T28
(FX50)
R101
1-216-841-11
METAL
CHIP
4ik
5%
1/16W
R102 1-216-841-11 METAL CHIP 47K 5% 1/16W
« IC > R103 1-216-821-11 METAL CHIP 1K 5% 1/16W
R104 1-216-821-11 METAL CHIP 1K 5% 1/16W
10301
8-759-230-91
IC
TATTS5FN
R105
1-216-856-11
METAL
CHIP
820K
5%
1/16W
10302 8-759-230-88 IC TA7T793FN
1C303
8-759-512-77
IC
RC2106M
R106
1-216-840-11
METAL
CHIP
39K
5%
1/16W
10304
8-759-805-02
1C
{£A4538M
R107
1-216-843-11
METAL
CHIP
68K
5%
1/16W
(C601
8-759-821-20
IC
LBi672M
R108
1-216-820-11
METAL
CHIP
820
5%
1/16W
R109 1-216-825-11 METAL CHIP 2, 2K 5% 1/16W
[C702
8-759-515-82
IC
$-8125AG-RK-S
(EX50)
R110
1-216-824-11
METAL
CHIP
1.
8K
5%
1/16W
« JACK > R141 {-216-845-11 METAL CHIP 100K 5% 1/16W
R112 1-216-839-1141 METAL CHIP 33K 5% 1/16W
J301
1-568-467-11
JACK
(PHONES)
R113
1-216-838-11
METAL
CHIP
27K
5%
1/16W
R114 1-216-994-11 METAL GLAZE 13K 5% 1/16W
< RESISTOR > R115 1-216-852-11 METAL CHIP 390K 5% 1/16W
JR7O1
1-216-864-11
METAL
GLAZE
5%
1/16W
(EX50)
R116
1-216-840-11
METAL
CHIP
39K
5%
1/16W
RV17 1-216-793-11 METAL GLAZE 4,1 5% 1/16W
R118 1-216-821-11 METAL CHIP 1K 9% 1/18W
R121 1-216-825-11 METAL CHIP 2. 2K 5% 1/16W
R201 1-216~-841-11 METAL CHIP 47K 5% 1/16W
R202 1-216-841-11 METAL CHIP 47K 0% 1/18W