Denon DCD-715 - LASER PICK-UP CAUTIONS AND HANDLING; General Handling and Storage; Laser Diode Safety

qm
OCD-715/615
a
A
10
Caution for Handling the Laser Pick-up
The
laser
pick-up
KSS-240A
is
assembled
and
precisely
ad-
justed
using
a
sophisticated
manufacturing
process
in
our
plant.
Do
not
disassemble
or
attempt
to
readjust
it.
Please
keep
the
following
instructions
carefully
in handling
pick-up.
1. Handle with Care
(1) Storage
Do
not
store
the
pick-up
in
dusty,
high-temperatured
or
high-humidity environments.
(2)
Please
take
care
for
preventing
from
shock
by
falling
down
or
careless
handling.
2. Laser Diode (LD)
(1) Protect your eyes
The laser beam may damage the human eye, since the
intensity of the focused spot may reach 7 x 10° W/cm? even
if
the
intensity
at
the
objective
lens
is
400
uW
maximum.
As
the
light
beam
spreads
after
focused
through
the
objective
lens,
it
does
not
effect
you
in
the
place
as
far
as
more
than
30 cms. However, do not look at the laser light beam either
through
the
objective
fens
directly
nor
another
lens
or
a
mirror.
(2) Poison of As
Since
the
LD
chip
contains
As
(Arsenic),
as
GaAs
+
GaAlAs,
as known as the poison, although the poison is relatively
weak, in comparing with others, e.g.As2O3, AsCls etc., and
the
amount
is
small,
avoid
putting
the
chip
in
acid
or
an
alkali
solution,
heating
it
over
200°C
or
putting
it
into
your
mouth.
(3) Avoid surge current or electrostatic discharge
The LD may be damaged or deteriorated by its own strong
light if a large current is supplied to it, even if only a short
pulse.
Make
sure
that
there
is
no
surge
current
in
the
LD
driving
circuit by switches or else. Be careful to handle pick-up as it
may be damaged in a moment by human electrostatic dis-
charge. The pins of the LD are short-circuited by solder for
protection during shipment.
For safety handling of an LD, grounding the human body,
measuring equipments and jig is strongly recommended. And
still
it
is
further
desirable
to
make
use
of
mat
on
the
platform
and floor for handling the LD.
To
open
the
short-circuit,
remove
the
soldering
quickly
with
a
soldering iron whose metal part is grounded.
The
temperature
of
the
soldering
iron
should
be
less
than
320°C (30W).
3. Actuator
(1)
The
performance
of
the
actuator
may
be
effected
if
magnetic
material
is
located
nearby,
since
the
actuator
has
a
strong
magnetic
circuit.
Do
not
permit
dust
to
enter
through
the
clearance
of the
cover.
(2) Cleaning the lens
It may change the specifications by attaching dust or ash on
the
objective
lens.
Clean
the
lens
with
a
cleaning
paper
dampened with a little water, not pressing lens with so much
strength by the cleaning paper.
4. Metal Bearing
As
the
metal
bearing
of
Cu-compound
sintered
alloy
is
impreg-
nated
with
FROIL946P
("Part
No.
529
0054
007),
never
fail
to
supply
the
bushing
with
the
same
lubricant
at
the
time
of
replac-
ing
the
pick-up.
5. Handling
Please
handle
the
laser
pick-up
with
holding
the
side
base
(rosin
molded
part).
When
either
a
part
of
human
body
or
some
other
things
may
happen
to
touch
directly
with
the
circuit
part
of
P.W.Board,
it
may
cause
deterioration,
take
careful
attention
in
handling
this
base.
6. Deterioration
As
KSS-240
comprises
built-in
RF
Amp
and
APC
curcuit,
it
resists
stronger
against
external
electrostatic
damages
than
the
former
typed
pickup.
However,
there
is
possibility
of
pickup
deterioration in the following cases.
(1) Low HF level, or with great numbers of jitters.
(2)
Tracking
offset
(EF
Balance)
is
out
of
order
(Refer
to
"Con-
firmation
Method
of
Adjustment
"
for
confirmation
on
(1)
and
(2)).