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Sony Walkman WM-EX618 User Manual

Sony Walkman WM-EX618
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SECTION
1
SERVICING
NOTE
Hall
element
H701
mounted
on
the
main
board
is
used
to
detect
rotaion
of
the
reels.
Because
it
is
mounted
on
the
main
board,
when
the
main
board
is
being
removed,
rotation
of
the
reels
cannot
be
detected
and
the
auto-off/tape-end
detector
circuit
does
not
operate
correctly.
Switch
S702
(for
N/R
and
FF/REW)
is
also
mounted
on
the
main
board.
Therefore,
without
the
main
board,
the
head
cannnot
be
placed
in
playback
position,
and
power
cannot
be
supplied
to
the
circuitry
of
the
playback
system.
When
the
main
board
is
being
removed,
follow
the
procedures
below,
in
order
to
check
operation
of
the
mechanisms
of
the
tape
deck
and
to
check
voltages
supplied
to
each
circuit.
SETTING
1)
Refer
to
“Disassembly”
and
remove
the
cabinet
and
open
the
MAIN
board.
2)
Turn
OFF
the
BL
SKIP
switch
(S704)
of
the
MAIN
board.
3)
Supply
1.5V
to
the
battery
terminals
(+)
and
(—)
using
a
stabilized
power
supply.
Note
1
:
Do
not
change
the
setting
position
of
switch
S702
when
removing
the
main
board.
If
it
has
been
changed
accidentally,
or
if
the
desired
mode
cannot
be
set
with
the
switch,
adjust
the
setting
again
after
the
audio board
is
installed.
Note
2
:
Use
the
remote
control
<>,
0,
FF,
and
REW
switches
as
much
as
possible.
If
the
remote
control
is
not
available,
do
not
touch
$707
to
S710
with
the
hand
and
use
something
with
a
round
tip
to
press
them.
FF/REW
mode
(1)
Apply
a
square
wave
signal
or
a
sine
wave
signal
to
hall
element
sensor
H701.
(See
the
figure
below.)
(2)
Slide
the
STOP
switch
for
selecting
STOP
mode.
(3)
Slide
the
FF
or
REW
switch.
(4)
Remove
the
main
board.
PLAY mode
(1)
Apply
a
square
wave
signal
or
a
sine
wave
signal
to
hall
element
sensor
H701.
(See
the
figure
below.)
(2)
Slide
the
STOP
switch
for
selecting
STOP
mode.
(3)
Slide
the
PLAY
switch.
With
the
audio
board
installed,
Slide
the
PLAY
switch
selects
the
FWD
or
REV
mode
alternatively.
(4)
Remove
the
main
board.
AF
OSCILLATOR
Cx
SQUARE
WAVE
°
(SINE
WAVE)
5Hz
MAIN
BOARD
(SIDE
A)
—20dB
(0.1V)
B+
FF
Sw
(0)
TP30
HALL
(+)
—3
oc
1.5V
REW
SW
[(O}
C/O
7P29
HALLS)
2
OPS
GND
BL
SKIP
SW
STOP
SW
|
MAIN
BOARD
(SIDE
B)

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Sony Walkman WM-EX618 Specifications

General IconGeneral
BrandSony
ModelWalkman WM-EX618
CategoryCassette Player
LanguageEnglish

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