SERVICE MANUAL
Ver 1.0 2002.01
9-873-469-01
Sony Corporation
2002A0500-1
Personal Audio Company
C
2002.1
Published by Sony Engineering Corporation
RADIO CASSETTE PLAYER
US Model
AEP Model
E Model
Chinese Model
SPECIFICATIONS
WM-FX521
Model Name Using Similar Mechanism
NEW
Tape Transport Mechanism Type
MT-WMEX505-162
Radio section
Frequency range
FM: 87.5 - 108 MHz
AM: 530 - 1 710 kHz (North, Central, and South America)
531 - 1 602 kHz (other countries)
Tape section
Frequency response
Playback: 40 - 15 000 Hz
Output
Headphones (i) jack
Load impedance 8 - 300
General
Power requirements
1.5 V
One R6 (size AA) battery
Dimensions (w/h/d)
Approx. 77.0
× 108.4 × 28.7 mm, excl. projecting parts and
controls
Mass
Approx. 165 g (main unit only)
Supplied accessories
· Stereo headphones/earphones with remote control or stereo
headphones/earphones (1)
Design and specifications are subject to change without notice.
Battery life (Approx. hours)
(JEITA*)
Tape playback Radio reception
Sony alkaline LR6 (SG)**
35
65
* Measured value by the standard of JEITA (Japan Electronics
and Information Technology Industries Association). (Using
a Sony HF series cassette tape)
**When using a Sony LR6 (SG) "STAMINA" alkaline dry
battery (produced in Japan).
Note
· The battery life may be shorter depending on the
operating condition, the surrounding temperature
and battery type.
2
WM-FX521
TABLE OF CONTENTS
1.
SERVICING NOTES ............................................... 3
2.
GENERAL ................................................................... 5
3.
DISASSEMBLY
3-1. Disassembly Flow ...........................................................
6
3-2. Lid Cassette Assy ............................................................
6
3-3. Case Block Assy ..............................................................
7
3-4. Ornament Reel ................................................................
7
3-5. Battery Holder .................................................................
8
3-6. Belt (F2) ..........................................................................
8
3-7. MAIN Board ...................................................................
9
3-8. Motor (Capstan/Reel) (M901) ........................................ 10
3-9. Holder (FS) Assy ............................................................. 10
3-10. Pinch Lever (N) Assy, Pinch Lever (R) Assy ................. 11
3-11. Magnetic Head (Playback) (HP901) .............................. 11
4.
MECHANICAL ADJUSTMENTS ....................... 12
5.
ELECTRICAL ADJUSTMENTS ......................... 12
6.
DIAGRAMS
6-1. Block Diagram TUNER Section ............................. 15
6-2. Block Diagram MAIN Section ................................ 16
6-3. Note for Printed Wiring Board
and Schematic Diagrams ................................................ 17
6-4. Schematic Diagram MAIN Board (1/2) .................. 18
6-5. Schematic Diagram MAIN Board (2/2) .................. 19
6-6. Printed Wiring Board ...................................................... 20
6-7. IC Pin Function Description ........................................... 23
7.
EXPLODED VIEWS
7-1. Case Section .................................................................... 25
7-2. Bracket, MAIN Board Section ....................................... 26
7-3. Mechanism Deck Section (MT-WMEX505-162) .......... 27
8.
ELECTRICAL PARTS LIST ............................... 28
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.
Flexible Circuit Board Repairing
· Keep the temperature of the soldering iron around 270 °C dur-
ing 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.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED
LINE WITH MARK 0 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 PUB-
LISHED BY SONY.
3
WM-FX521
SECTION 1
SERVICING NOTES
This set detects the rotation of the idler gear (A) (side S) using the
PH701 (photo reflector). The PH701 is mounted on the MAIN
board, therefore the idler gear (A) (side S) cannot be detected with
the MAIN board removed. As a result, the motor (M901) cannot
be controlled, causing malfunction.
Further, the DIRECTION switch (S703) is also mounted on the
MAIN board, and with the board removed, the mechanism posi-
tion cannot be detected and the operation is not changed over.
Therefor, when the voltage check is executed with the MAIN board
removed, follow the procedure provided below.
1. Setting
(1)
Refer to "3. DISASSEMBLY", and remove the MAIN board.
(2)
Connect the MAIN board to the motor (M901) and the
plunger (PM901) using jumper wires. These can be connected
easily with the use of the extension tool (Part No. 1-769-
143-11) (ten in one set).
(3)
Short the TAPE DETECT switch (S901-1) terminals and the
ATS switch (S901-2) terminals.
(4)
Connect the AF oscillator to the TP40 (PHOTO IN) and the
TP2 (GND).
(5)
Supply 1.3 V to the battery terminals using the regulated
power supply.
2. Preset state
To set the PLAY, FF, REW modes, the preset state must be set.
(1)
Check that the slider (NRA) and the DIRECTION switch
(S1) are set to the center position. If not, set the preset state
as follow.
(2)
Move the DIRECTION switch (S703) to the side, which the
slider (NRA) is facing.
(3)
The slider (NRA) will move when the regulated power sup-
ply switch is set to OFF once and then set to ON. Move the
DIRECTION switch (S703) according to this timing and set
to the center position.
3.
FF, REW modes
(1)
Check that the preset state is set.
(2)
Input the square wave or sine wave to the TP40 (PHOTO IN)
and the TP2 (GND).
(3)
Press the [RADIO OFF
] button (S709) to set the STOP
mode.
(4)
Press the [FF AMS] button (S707) or the [REW AMS] but-
ton (S708).
4. PLAY mode
(1)
Check that the preset state is set.
(2)
Input the square wave or sine wave to the TP40 (PHOTO IN)
and the TP2 (GND).
(3)
Press the [RADIO OFF
] button (S709) to set the STOP
mode.
(4)
Press the [
REPEAT] button (S710) will move the slider
(NRA) once towards the side R and then to the side F. Move
the DIRECTION switch (S703) according to this timing will
set the PLAY mode (side F). Press the [
REPEAT] button
(S710) another time and move the DIRECTION switch
(S703) according to the movement of the slider (NRA) will
set the PLAY (R mode).
Note 1: If the above fails, perform from preset again.
Note 2: Use the [
REPEAT] (S710)
, [RADIO OFF ] (S709), [FF AMS]
(S707), and [REW AMS] (S708) buttons on the remote control-
ler as much as possible. If no remote controller, do not touch the
buttons with your hands, but using a stick with a round tip.
Note 3: When using headphones, the timing for move the DIRECTION
switch (S703) can be determined from the beep sound.
+
PH701
TP40
(PHOTO IN)
TP2
(GND)
TAPE DETECT
(S901-1)
ATS
(S901-2)
REPEAT
(S710)
RADIO OFF
(S709)
connect to the plunger
(PM901)
connect to the
motor (M901)
FF AMS
(S707)
battery
terminal #
battery
terminal 3
square wave
(sine wave)
10 Hz, 3.5 dB
AF oscillator
S703
DIRECTION
FWD
R
STOP
r
REV
REW AMS
(S708)
MAIN BOARD
x
Y
Y
Y
x
x
4
WM-FX521
SLIDER (NRA)
Rotation system
Rotation system during PLAY
Rotation system during FF
Rotation system during REW
slider (NRA)
side F side R
center
insert flywheel (N) insert flywheel (R)
reverse pulley
clutch assy (F)
gear (Y)
cam gear
gear (REEL)
(T side)
motor pulley
idler (A) gear (T side)
gear (FR)
(FF: left side)
insert flywheel (N)
insert flywheel (R)
reverse pulley
clutch assy (F)
gear (Y)
cam gear
gear (REEL) (T side)
motor pulley
idler (A) gear (T side)
gear (NR)
(FWD: left side
REW: right side)
idler (B) gear
idler (A) gear (S side)
gear (REEL) (S side)
insert flywheel (N)
insert flywheel (R)
reverse pulley
clutch assy (F)
gear (Y)
cam gear
motor pulley
gear (FR)
(REW: right side)
idler (A) gear (S side)
gear (REEL) (S side)
5
WM-FX521
SECTION 2
GENERAL
This section is extracted from
instruction manual.
C
D
x
VOL
VOL*
HOLD
HOLD
Y·REPEAT**
FF (AMS)
REW (AMS)
Y·x**
REW
Plug in firmly.
Branchez fermement.
Fest einstecken.
i
FF
MENU
SET
FWD (forward) side
Face FWD (avant)
Vorderseite (FWD)
REV (reverse) side
Face REV (inverse)
Rückseite (REV)
A
PRESET
RADIO OFF
SET
MENU
TUNE/PRESET +
RADIO ON/
BAND·OFF
PRESET +
TUNE/PRESET
ENTER
BAND·
RADIO ON
B
OPEN
* There is a tactile dot beside VOL on the main unit to show the direction to turn up the volume.
** The button has a tactile dot.
*
Un point tactile à côté de VOL sur l'appareil principal indique le sens de rotation du bouton de
volume.
** Le bouton comporte un point en relief.
*
Am Hauptgerät befindet sich ein fühlbarer Punkt neben VOL. Dieser gibt die Richtung an, in der
man die Lautstärke erhöht.
** An dieser Taste befindet sich ein fühlbarer Punkt.
Model supplied with remote control
Modèle fourni avec télécommande
Modelle mit Fernbedienung
Model supplied with headphones/earphones only
Modèle fourni uniquement avec un casque/des écouteurs
Modelle mit Kopfhörer/Ohrhörer
RADIO OFF
SET
MENU
TUNE/PRESET +
TUNE/PRESET
ENTER
BAND·
RADIO ON
Model supplied with remote control
Modèle fourni avec télécommande
Modelle mit Fernbedienung
Model supplied with headphones/earphones
only
Modèle fourni uniquement avec un casque/des
écouteurs
Modelle mit Kopfhörer/Ohrhörer
F
SET
MENU
HOLD
HOLD
E
PRESET
RADIO OFF
SET
MENU
TUNE/PRESET +
RADIO ON/
BAND·OFF
PRESET +
TUNE/PRESET
ENTER
BAND·
RADIO ON
RADIO OFF
SET
MENU
TUNE/PRESET +
TUNE/PRESET
ENTER
BAND·
RADIO ON
Model supplied with remote control
Modèle fourni avec télécommande
Modelle mit Fernbedienung
Model supplied with headphones/earphones
only
Modèle fourni uniquement avec un casque/
des écouteurs
Modelle mit Kopfhörer/Ohrhörer
SET
MENU
HOLD
Model supplied with remote control
Modèle fourni avec télécommande
Modelle mit Fernbedienung
Model supplied with headphones/
earphones only
Modèle fourni uniquement avec un casque/
des écouteurs
Modelle mit Kopfhörer/Ohrhörer