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CDP-590
TABLE OF
CONTENS
Section
Title
Page
Specifications
1
1.
GENERAL
4
2.
iC
FUNCTION DESCRIPTION
5
3.
DISSASSEMBLY OF BASE
UNIT
6
4.
ADJUSTMENTS
7
5.
DIAGRAMS
H
5-1.
Waveforms
11
5-2-
Printed
Wiring Boards
12
5-3.
Schematic
Diagram
15
5-
4.
IC Block
Diagrams
19
6.
EXPLODED VIEWS
21
6-
1.
Cabinet
Section
21
6-2.
Front Panel
Section
22
6-3.
MD
Section-KCDM
L4-5RD1)
23
6-4.
MD
Section-2(BU-5BDl)
24
7.
ELECTRICAL
PARTS
LIST
25
SUPPLEMENT-1
(AEP and
UK
Model)
3.
Measuring
the voltage
drop
across
a resistor
by
means
of
a
VOM
or battery-operated
AC
volt-
meter.
The
"limit" indication
is
0.75V,
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
0
.
15 ;^
-r-
Earth
Ground
AC
voltmeter
(0.75V)
Fig.
A.
Using an
AC
voltmeter to
check
AC
leakage.
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
0.5
mA
(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-S40A.
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.
SERVICING
NOTE
NOTES
ON HANDLING
THE
OPTICAL
PICK-
UP
BLOCK
OR
BASE UNIT
The
laser
diode
in
the
optical
pick-up block
may
suffer electrostatic
breakdown
because of the poten-
tial
difference
generated
by
the
charged
electrostatic
load,
etc.
on
clothing
and
the
human
body.
During
repair,
pay
attention to
electrostatic
break-
down
and
also
use the
procedure
in
the printed
matter
which
is
included
in
the
repair parts.
The
flexible
board
is
easily
damaged and
should
be
handled with
care.
CAUTION
Use
of controls or adjustments or
performance
of procedures other than those
specified herein
may
result
in
hazardous
radiation
exposure.
NOTES
ON
LASER DIODE EMISSION
CHECK
The
laser
beam
on
this
model
is
concentrated so
as
to
be
focused
on
the disc
reflective
surface
by
the objective
lens
in
the optical
pick-up
block. Therefore,
when
check-
ing the laser
diode
emission,
observe
from
more
than 30
cm
away
from
the objective
lens.
-2
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