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TABLE OF CONTENTS
Section
Title
Page
1.
GENERAL·····························································3
2. TEST
MODE························································
17
3. CLOCK CONSTRUCTION .... · ...... ·
........
· .. · ...... ·· ......
19
4.
EXPLANATION
OF
IC
TERMINALS
......................
·
20
5.
DIAGRAMS
5-1. Block
Diagram·················································
24
5-2. Printed Wiring
Boards···········
.. · .. · ..
··············
.. · .. ·
28
5-3. Schematic Diagram (l/2)
................................
· .. ·33
5-4. Schematic Diagram (2/2)
....................................
38
6. EXPLODED VIEWS
6-1. Front Panel
Section···········································
48
6-2. Chassis
Section················································
49
7. ELECTRICAL PARTS LIST
...................................
50
CAUTION
Danger of explosion if
battery
is in.correctly re-
placed. Replace only with the
same
or
equivalent
type recommended by the equipment
manufacturer.
Discard
u,sed
batteries
according to
manufacturer's
instructions.
ADVARSEL!
Lithiumbatteri-Eksplosionsfare ved fejlagtig handtering.
Udskiftning
rna
kun
ske
med
batteri
af
samme
fabrikat
og type.
SAFETY
CHECK-OUT
(US Model)
A
fter
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
;my
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
0.5
rnA
(500
microampers).
Leakage
current
can
be
measured
by
anyone
of
three
methods.
I.
A
commercial
leakage
tester,
such
as
the
Simpson
229
or
RCA
WT-540A.
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.
3.
Measuring
the
voltage
drop
across
a
resistor
by
means
of
a YOM
or
battery-operated
AC volt-
meter.
The
"limit"
indication
is
0.75
Y,
so
analog
meters
must
have an
accurate
low-
voltage scale.
The
Simpson
250
and
Sanwa
SH-63Trd
are
examples
of
a passive YOM
that
is
suitable.
Nearly all
battery
operated
digital
multimeters
that
have a 2 Y AC range
arc
suitable.
(See Fig. A)
0.15pF
To
Exposed
Metal
Parts
on
Set
AC
voltmeter
(0.75
V)
Lever det
brugte
batteri
tilbage til leverand¢ren.
-=-
Earth
Ground
ADVARSEL
Eksplosjonsfare
ved
feilaktig skifte
av
batted.
Benytt
samme
batteritype
eller
en
tilsvarende
type
anbcfalt
av
apparatfabrikanten.
Brukle
batterier
kasseres i
hen
hold
til
fabrikantens
instruksjoner.
VARNING
Explosionsfara
vid
felaktigt
batteribyte.
Anva.nd
samma
batterityp
eller
en
Iikva.rdig
typ
som
rekommenderas
av
apparattillverkaren.
Kassera
anva.nt
batteri
enIigt ga.llande
f6reskrifter.
VAROITUS
Paristo
voi r:ijahUUi, jos se on virheellisesti asennettu.
Vaihda
paristo
ainoastaan
laitevalmistajan
suosittelemaan
tyyppiin.
H:ivit:i k:iytetty
paristo
valmistajan
ohjeiden mukaisesti.
-2-
Fig. A. Using an
AC
voltmeter
to
check
AC
leakage.
SAFETY-RELATED
COMPONENT
WARNING!!
COMPONENTS
IDENTIFIED
BY
MARK
ill.
OR
DOTTED
LINE
WITH
MARK
ill.
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.
ATTENTION
AU
COMPOSANT
AYANT
RAPPORT
A
LA
SECURITE!
LES
COMPOSANTS
IDENTIFIES
PAR
UNE
MARQUE
ill.
SUR
LES
DIAGRAMMES
SCHEMATIQUES
ET
LA
L1STE
DES PIECES
SONT
CRITIQUE:S
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.