Advertisement
QQ
3 7 63 1515 0
Caution for Handling the Laser Pick-up
The laser pick-up KSS-213C is assembled and precisely
adjusted using a sophisticated manufacturing process in our
plant. Do not disassemble or attempt to readjust it. Please
observe the following instructions carefully in handling the
pick-up.
1. Handle with Care
(1) Storage
Do not store the pick-up in dusty, 0 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 7x 10
W/cm
2
even if the intensity at the objective lens is 400µW
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 lens
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. As
AsCl
etc., and the amount is small, avoid putting the
3
TE
L 13942296513
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 discharge. 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 affected 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
www
It may change the specifications by attaching dust or
ash on the objective lens. Clean the lens with a cleaning
paper dampened with, not pressing lens with so much
strength by the cleaning paper.
.
http://www.xiaoyu163.com
x
ao
u163
y
i
http://www.xiaoyu163.com
2 9
8
4. Metal Bearing
As the metal bearing of Cu-compound sintered alloy is
impregnated with FROIL946P, never fail to supply the
bushing with the same lubricant at the time of replacing the
pick-up.
5. Handling
Please handle the laser pick-up with holding the slide base.
(resin 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-213C comprises built-in RF Amp and APC circuit,
resists stronger against external electrostatic damages than
the former typed pickup. However, there is possibility of
3
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
"Confirmation Method of Adjustment" for confirmation (1)
and (2)).
O
,
2
3
Q Q
3
6 7
1 3
1 5
co
.
8
DCD-500AE
9 4
2 8
0 5
8
2 9
9 4
2 8
m
9 9
9 9
Advertisement
