TC-C5/C521
TABLE
OF
CONTENTS
Section
Title
Page
SAF
ETY
CHECK-OUT
SERVICE
NOTE
cocccceccsssceesssseccceeereeesseeeanansnsseescnaaneeresseasonvons
3
SECTION
1.
GENERAL,
cccccsssesscessestesseeeterssssnaanaesccaacanenceseees
5
After
correcting
the
original
service
problem,
perform
the
following
safety
check
before
releasing
SECTION
2.
DISASSEMBLY
PPPeTTee
eee
err
er
re
rer
eer
eer
rarer
rer
eer
errr
6
the
set
to
the
CUStOmer
F
.
SECTION
3,
DIAGRAM
PPPTTETTESITESITETETT
Teer
eee
10
Check
the
antenna
terminals,
metal
trim,
‘“‘metallized”’
knobs,
screws,
and
all
other
exposed
metal
parts
for
SECTION
4.
MECHANISM
OPERATION
cvvccssssstesssesseeees
13
AC
leakage.
Check
leakage
as
described
below.
SECTION
5.
ADJUSTMENTS
Orererrr
ere
rere
rrr
er
rer
err
eer
erect
caries
17
LEAKAGE
TEST
SECTION
6.
DIAGRAMS
The
AC
leakage
from
any
exposed
metal
part
to
6-1.
Printed
Wiring
Boards
earth
ground
and
from
all
exposed
metal
parts
to
any
—
Audio/System
Control
Section
Former
Type
—::
21
exposed
metal
part
having
a
return
to
chassis,
must
6-2.
Printed
Wiring
Boards
not
exceed
0.5
mA
(500
microampers).
Leakage
—
Audio/System
Control
Section
New
Type
—
+++"
25
current
can
be
measured
by
any
one
of
three
6-3.
Schematic
Diagram
—
System
Control
Section
+++
29
methods.
Ic
Block
Diagram
eer
c
eee
ee
eee
ree
eres
renee
sees
sesereeeereees
32
1.
A
commercial
leakage
tester,
such
as
the
6-4.
Circuit
Boards
Location
sovrrrrssessseeseeeseeesseneveseneneas
33
Simpson
229
or
RCA
WT-S40A.
Follow
the
6-5.
Schematic
Diagram
—
Audio
Section
——
strrrrrrrrsteteees
33
manufacturers’
instructions
to
use
these
instru-
6-6.
Printed
Wiring
Board
—
TC
Section
—
srssreessereeees
37
ments.
Fluorescent
Indicator
Tube
emcee
eevee
enenseosreeeveseneees
39
2.
<A
battery-operated
AC
milliammeter.
The
Data
Semiconductor
Lead
Layouts
¢srsrstssseresesesserereesenees
40
Precision
245
digital
multimeter
is
suitable
for
this
job.
SECTION
7.
EXPLODED
VIEWS
a,
Measuring
the
voltage
drop
NETOREA
resistor
by
9
as
BN
Drum
Section
PPUPUUTUSUOUTOCETIOTIPOPI
SESE
eee
r
reer
re
eer
ee
rrr
41
ineane
of
4“
VOM
or
battery-operated
AC
volt-
7.2.
Front
Panel
Section
cccresceceeceeeeesceereenecseasreensesenes
42
meter.
The
“limit”
indication
is
0.75
V,
so
T-3,
Slider
Section
ccrccercrsrtcstereetsecreeceneeescencweescsceesees
43
analog
meters
must
have
an
accurate
low-
TA,
Chassis
Secuon.
sroshtaereters
eweresttarsasasannsetesernserees
44
voltage
scale.
The
Simpson
250
and
Sanwa
7-5.
Mechanism
Section
1
s*sersreorsssssreererveceesccecscsccscoens
45
SH-63Trd
are
examples
of
a
passive
VOM
that
7-6.
Mechanism
Section
2
cccrrrsseessstessessesesseessreesseeeenes
46
is
suitable.
Nearly
all
battery
operated
digital
multimeters
that
have
a'2
V
AC
range
are
SECTION
8.
ELECTRICAL
PARTS
LIST
srvevvsssersrsrsrrees
47
suitable.
(See
Fig.
A)
MODEL
IDENTIFICATION
ee
—
Specification
Label
—
TC-C521
To
‘Exposed
Metal
Parts
on
Set
SON
Y.
MODEL
NO.
WLLLL/LA
STEREO
CASSETTE
DECK
AC
voltmeter
(0.75
V}
SERIAL
NO.
MADE
IN
JAPAN
US,
Canadian
model:
AC120V
60Hz
20W
AEP,
Germany
model:
AC220-230V-~50/60Hz
UK
model:
AC240V-~50/60Hz
E
model:
AC120,
220,
240V~50/60Hz
20W
“=
Earth
Ground
Fig.
A.
Using
an
AC
voltmeter
to
check
AC
leakage.
ATTENTION
AU
COMPOSANT
AYANT
RAPPORT
A
LA
SECURITE!
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.
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.
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