Onkyo DX-C300 Service Manual

CAUTION
ON
REPLACEMENT
OF
PICK-UP
The
laser
diode
in
the
optical
pick-up block
is
so
sensitive
to
static
electricity,
surge
current
and
etc.
that
the
com-
ponents
are
liable
to
be
broken
down
or
its
reliability
remarkably
deteriorated.
PRECAUTIONS
During
repair,
carefulley
take
the
following
precautions.
(The
following
precautions
are
included
in
the
service
parts).
1,
Ground
for
the
work-desk.
Place
a
conductive
sheet
such
as
a
sheet
of
copper
(with
impedance
lower
than
10°82)
on
the
work-
desk
and
place
the
set
on
the
conductive
sheet
so
that
the
chassis.
2.
Grounding
for
the
test
equipment
and
tools.
Test
equipments
and
toolings
should
be
grounded
in
order
that
their
ground
level
is
the
same
the
ground
of
the
power
source.
LD terminals
3. Grounding for the human body.
Be
sure
to
put
on
a
wrist-strap
for
grounding
whose
other end is grounded.
Be particularly careful when the workers wear
synthetic
fiber
clothes,
or
air
is
dry.
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.
(Care
should
be
taken
with
the
optical
pickup.)
The
optical
pickup
is
sensitive
to
static
electricity,
surge
currents,
and
other
high
electrical
noise,
and
because
there
is
the
possibility
of
damage
to
performance,
in
the
handling
of
the
pickup,
the
utmost
care
must
be
taken,
particularly
with
regard
to
static
electricity.
1.
When
replacing
the
optical
pickup,
first
short
the
LD
terminals
and
remove
the
connector.
Also,
when
ataching
the
new
optical
pickup,
after
attaching
the
connector,
unsolder
the
LD
terminals.
2.
Do
not
touch
the
optical
pickup
object
lens
with
the
hands.
PROTECTION
OF
EYES
FROM
LASER
BEAM
DURING
SERVICING
This set employs a laser. Therefore, be sure to follow
carefully the instructions below when servicing.
WARNING!!
WHEN SERVICING, DO NOT APPROACH THE LASER
EXIT WITH THE EYE TOO CLOSELY. IN CASE IT IS
NECESSARY TO CONFIRM LASER BEAM EMMISION,
BE SURE TO OBSERVE FROM A DISTANCE OF MORE
THAN 30cm FROM THE SURFACE OF THE OBJECTIVE
LENS ON THE OPTICAL PICK-UP BLOCK.
Laser Diode Properties
© Material: GaAS/GaAlAs
© Wavelength: 780nm
@ Emission Duration: continuous
© Laser output: max. 0.5mW*
*This output is the value measured at a distance
about 1.8mm from the objective lens surface
‘on the Optical Pick-up Block.

Onkyo DX-C300 Specifications

General

Brand	Onkyo
Model	DX-C300
Category	CD Player
Language	English