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SAFETY
CHECK-OUT
After
correcting
the
original
service
problem,
perform the following safety check before releasing
the set to the customer:
Check the antenna terminals, metal trim, "'metallized"
knobs, screws, and all other exposed metal parts for
AC leakage.
Check leakage as described below.
LEAKAGE
TEST
The AC leakage from any exposed metal part to
earth ground and from all exposed metal parts to any
exposed
metal part having a return to chassis, must
not
exceed
0.5mA
(500
microampers).
Leakage
current
can
be
measured
by
any
one
of three
methods.
1.
A
commercial
leakage
tester,
such
as
the
Simpson
229
or RCA
WT-S540A.
Follow the
manufacturers' instructions to use these instru-
ments.
2.
A battery-operated AC milliammeter.
The Data
Precision 245 digital multimeter is suitable for
this job.
SAFETY-RELATED
COMPONENT
WARNING!!
COMPONENTS
IDENTIFIED
BY MARK
A OR
DOTTED
LINE WITH MARK
A 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.
Measuring the voltage drop across a resistor by
means
of a VOM
or battery-operated
AC volt-
meter.
The
'limit'?
indication
is 0.75 V, so
analog
meters
must
have
an
accurate
low-
voltage
scale.
The
Simpson
250
and
Sanwa
SH-63Trd
are examples of a passive VOM
that
is suitable.
Nearly all battery operated
digital
multimeters
that
have
a
2V
AC
range
are
suitable.
(See Fig. A)
To Exposed Metal
Parts on Set
AC
0.15 pF
voltmeter
Prod (0.75 V)
=
£arth Ground
Using an AC voltmeter to check AC leakage.
ATTENTION
AU
COMPOSANT
AYANT
RAPPORT
A LA SECURITE!
LES COMPOSANTS IDENTIFIES PAR UNE MARQUE /\
SUR LES DIAGRAMMES SCHEMATIQUES ET LA LISTE
DES
PIECES SONT
CRITIQUES
POUR
LA SECURITE
DE FONCTIONNEMENT.
NE REMPLACER
CES COM-
POSANTS
QUE
PAR
DES PIECES
SONY
DONT
LES
NUMEROS
SONT
DONNES
DANS
CE
MANUEL
OU
DANS LES SUPPLEMENTS PUBLIES PAR SONY.
SECTION
1
GENERAL
1-1.
IDENTIFYING THE PARTS
Front Panel
This section is extracted from
instruction
manual.
*Remote control sensor
(The illustration shows the TC-WR590.)
For details, refer to the page number indicated in
parenthesis.
[1] POWER switch
[2] Deck A
[3] COUNTER RESET button (deck A)
[4] DIR (direction) MODE switch
(pages 7, 8, 10 and 14)
[5] DOLBY NR (Dolby noise reduction) switch
(pages 7 and 10)
[6] Display panel
[7] SYNCHRO DUBBING buttons (page 14)
HIGH SPEED button
NORM (normal) SPEED button
[8] BALANCE control (page 10)
[9] REC (recording) LEVEL control (pages 10 and 11)
[10] COUNTER RESET button (deck B)
fii] Deck B
12] 4 (eject) button (deck B)
[13] HEADPHONES (headphones) jack (stereo phone
jack) (WR590 only)
Tape operation buttons
4 (leftward fast winding) button
>> (rightward fast winding) button
(stop) button
~"@ (reverse play) button
bb (forward play) button
Il PAUSE button (deck B only)
OQ REC MUTE (record muting) button (deck B only)
(page 13)
@ REC (recording) button (deck B only)
[15] & (eject) button (deck A)
*Remote controi sensor
You can remotely control this cassette deck with:
— Aremote commander that came with a Sony amplifier or
receiver if it has the lal mark and cassette deck control
capability.
— Any optional Sony remote commander with the lal mark
and cassette deck control capability.
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