8)
Cer48/<)
9)
COanel<
TABLE
OF
CONTENTS
SERVICE
PROCEDURES
1.
Safety-check
out
SpecificationsS............
cece
cece
cece
ee
eens
1
After
correcting
the
original
service
problem,perform
Service
procedUres..........
0...
cece
eee
ee
eee
2
the
following
safety
check
before
releasing
the
set
Caution
on
replacement
of
optical
pickup......
2
to
the
customer:
Protection
of
eyes
from
laser
beam............
3
Connect
the
insulating-resistance
tester
between
the
Laser
warning
labels..........--.-
0.0
eee
eenee
3
IC
block
diagrams
and
descriptions............
4
plug
of
power
supply
cord
and
chassis.
Packing
Vie€W...
eee
ee
te
et
te
te
ee
g
Specifications:
More
than
10Mohm
at
500V.
Wechanism-exploded
view.
..........
0202
e
eee:
10
2.
Voltage
Selector
(Back
panel)
Changer
mechanics
ee
ee
ete
ee
ee
eee
eee
ee
10
Worldwide
models
are
equipped
with
a
voltage
selector
Pick-up
drive
unit.
...
0.0.0.2...
2...
ee
ee
ees
12
.
.
Chassis-exploded
view...
....
2c
ce
ee
ee
ee
ee
13
to
conform
with
local
power
supplies.Be
sure
to
set
Parts
list...
.
2...
cece
ee
ee
teenies
15
this
switch
to
match
the
voltage
of
the
power
supply
Block
diagram...
...
00.
cece
cee
eee
ees
17
in
user's
area
before
turning
the
power
switch
on.
Adjustment
procedures...
....
0...
eee
eee
eee
19
Voltage
is
changed
by
sliding
the
groove
in
the
switch
Printed
circuit
board
view
from
bottom
side..
21
Printed
circuit
board-parts
list.............
23
with
a
screw
driver
to
the
right
or
left.
Confirm
that
the
switch
has
been
moved
all
the
way
to
Disassembling
procedures...............0e00-,
29
;
;
the
right
or
left
before
turning
the
power
switch
on.
220V
~
120V
~
at
ACL20V
220V
~
120V
~
at
AC220V
CAUTION
ON
REPLACEMENT
OF
OPTICAL
PICKUP
The
laser
diode
in
the
optical
pickup
block
is
so
During
repair,carefulley
take
the
following
precautions.
sensitive
to
static
electricity
surge
current
and
etc,
that
the
components
are
liable
to
be
broken
down
or
its
reliability
remarkably
deteriorated.
(The
following
precautions
are
included
in
the
service
parts.)
PRECAUTIONS
1.Ground
for
the
work-desk.
Place
a
conductive
sheet
such
as
a
sheet
of
copper
(with
inpedance
lower
than
10M)
on
the
work-
desk
and
place
the
set
on
the
conductive
sheet
so
3.Grounding
for
the
human
body.
Be
sure
to
put
on
a
wnist-strap
for
grounding
whose
other
end
is
grounded.
Be
particularly
careful
when
the
workers
wear
that
the
chassis.
synthetic
fiber
clothes,
or
air
is
dry.
2.Grounding
for
the
test
equipment
and
tools.
4.Select
a
soldering
iron
that
permits
no
leakage
and
have
the
tip
of
the
iron
well-grounded.
5.Do
not
check
the
laser
diode
terminals
with
the
probe
of
a
circuit
tester
or
oscilloscope.
Test
equipments
and
toolings
should
be
grounded
in
order
that
their
ground
level
is
the
same
the
ground
of
the
power
source.
