Samsung SD604 Precautions

1.Precautions

1-1. General items

1) Be careful not to have eyes or a part of
body touch with laser diode at repair because
this product uses laser diode.

2) Do not disassemble Pick-up at repair.

If the laser diode is bad, replace the

entire Pick-up.

3) Keep away from TV or other electrical units

at repair to prevent a influence from

surrounding units.

4) If you want to replace the parts during

repair, be sure to plug off power cable
before replacement.

5) If you insert a disc into CD player, beg

sure to load it correctly.

1-2. Electricity sensing device

Some semiconductor units may be damaged easily by
electricity. These elements are called as electricity
sensing device(ESD) in general. For example,
integrated circuit, field effect transister,
semiconduct chip.
The following methods have to be used to reduce the
accident of element damage generated by electricity.

1) Emit all electric charges in your body through
contact with earthing materail at once before
handling a semiconductor factor or device
including it.
In other way, make use of commercial wristlet
against electIC101ty. It shall be detached before
power impression to the unit on testing because
of shock.

2) After detaching an electrical device including
ESD, it shall be placed on conductive urface such
as aluminium to prevent the charge acummulation
and unit exposure.

3) Utilize only the soldering iron with earthed end
for ESD soldering or release.

4) Make use of only anti-static soldering release
unit. A soldering release unit not to be
classified as anti-static may generate the enough
charge to damage ESD unit.

5) Never use a Freon-propelling chemical product.
It may generate the enough charge to damage ESD.

6) Because this unit can't be used by itself, surely
mount it on PC(pentium or more) and check the

operations in use of private device drive floppy
diskettd. Refer to Instruction manual.

7) This unit has many parts with features related to

safety and especially, for essential parts, the

importance is indicated on circuit diagram and part
list. Be certain to use the parts with same
specifications at replacing these parts.

6) Untill installing ESD unit for replacement, never
it from protection package.(Most of ESD unit for
replacement have lead composed of package shorted
electrically by conductive foam, aluminium or
similar conductive material.

7) Contact with shassis including ESD or protection
material in circuit parts hust before detaching the
protection meterial from lead of ESD unit for
replacement.

NOTE: Be sure to avoid the power impression
to the shassis or circui t and observe the safey
instruction

8) Minimize the body action at handling an unpacked
ESD unit for replacement.
(Otherwise, an unconscious action, so to speak,
friction between clothes or foot lifting from
carpet floor may generate the enough charge to
damage ESD unit.)

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1-3. Safety instructions

1) Read all safety and operational manuals before
operating this product.

2) Keep the safety and operational manuals for future

reference.

3) Observe all precations and operational instuctions
in or on the suface of this product.

4) Follow all operation and maintenance cautions.

5) Be sure to plug off the power cable before cle­aning. Use a dry cloh to clean a dusty cover of
cabinet instead of Instead of liquid or aersol
cleaner.

6) Never use a attachment not to be recommended
by this company. It may result in danger and
damage.

7) Never use this product around water such as
bathtub, washbasin, laundry machine, swimming
pool or lakeside.

8) Never place this product on bed, sofa or around
radiator and heater.

9) Power : Utilize the only power displayed on lebel
If the power type can't be checked, call to dea­ler of Korea Electricity, Co, Ltd. Refer to opera­te this product by battery or other power.

10)Lightning : Plug off the power cable for product
protection during thunder and lightning flashes or
this product is unused for a long time.

11) Overload: Be careful that the wall outlet and
expanded cord is overloaded due to danger of
fire and electric shock.

12) Never insert a substance or liquid into this
prouct. It may cause fire or shorck by contact
with voltage point or short.

13) Part replacement : The service engineer has to
use the parts of same specification at replace­ment. Otherwire, Otherwire, fire, shock or other
dangers may be occurred.

14) Safety check : Be sure to perform the safety
check at service or repair completion.

Importance

:

This product includes special impotrant
parts on safety. These parts are indicated
by on schematic diagram.
At replac ement of these parts, use the
parts of same specification due to shock,
fire or other dangers.
Never transform the original design
without permission of this company.

1-4. Earthing cautions at handling Pick-up

Because the laser diode in optical Pick-up is subject
to get out of order due to the potential difference
occurring by electricity load charged in clothes or
bodies, observe the following eathing items at
handling.

1) Body earthing at repair : Be sure to wear a wrist
strip with one side earthed.(Impedance : Below

4

10§Ù). It removes the electicity formed in body.

2) Wire table earthing : Put the earthed conductive
Plate(Impedance : Below 10§Ù)such as copper plate
on work table.

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3) Cautions for clothes : Do not have any clothes is
destroyed easily.

4) FFC operation be careful to handle FFC because

it may be damaged easily.

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Samsung Electronics