Product Safety Servicing Guidelines - Dynex DX-32L200A12 Service Manual

ATTENTION:
This service manual is only for service personnel to take
reference with. Before servicing please read the following points
carefully.
1.Do not attempt to modify this product in any way. Unauthorized
modifications will not only void the warranty, but may lead to property
damage or user injury.
2.Be sure to switch off the power supply before replacing or welding
any components or inserting/plugging in connection wire.
3.Please refer to the part list before replacing components that have
special safety requirements. Do not replace with different
components with different specs and type at will.
4.Never perform customized installations without manufacturer's
approval.
5.Service work should be performed only after you are thoroughly
familiar with these safety checks and servicing guidelines.
GRAPHIC SYMBOLS
The exclamation point within an equilateral triangle
is intended to alert the service personnel to
important safety information in the service literature.
The lightning flash with arrowhead symbol within an
equilateral triangle is intended to alert the service
personnel to the presence of noninsulated
"dangerous voltage" that may be of sufficient
magnitude to constitute a risk of electric shock.
ANTI-STATIC INSTRUCTIONS:
Anti static measures must be taken (throughout the entire production
process!):
a) Do not touch here and there by hand at will;
b) Be sure to use anti static electric iron;
c) It's necessary for the welder to wear anti static gloves.
LCD SERVICING PRECAUTIONS
1. Screens are different from one model to another and therefore not
interchangeable. Be sure to use the screen of the original model for
replacement.
2. The operation voltage of LCD screen is 700-825V. Be sure to take
proper measures in protecting yourself and the machine when
testing the system in the course of normal operation or right after
the power is switched off. Please do not touch the circuit or the
metal part of the module that is in operation mode. Relevant
operation is possible only one minute after the power is switched off.
3. Do not use any adapter that is not identical with the TV set.
Otherwise it will cause fire or damage to the set.
4. Never operate the set or do any installation work in bad environment
such as wet bathroom, laundry, kitchen, or nearby fire source,
heating equipment and devices or exposure to sunlight etc.
Otherwise bad effect will result.
5. If any foreign substance such as water, liquid, metal slices or other
matters happens to fall into the module, be sure to cut the power off
immediately and do not move anything on the module lest it should
cause fire or electric shock due to contact with the high voltage or
short circuit.

Product Safety Servicing Guidelines

6. Should there be smoke, abnormal smell or sound from the module,
please shut the power off at once. Likewise, if the screen is not
working after the power is on or in the course of operation, the
power must be cut off immediately and no more operation is allowed
under the same condition.
7. Do not pull out or plug in the connection wire when the module is in
operation or just after the power is off because in this case relatively
high voltage still remains in the capacitor of the driving circuit.
Please wait at least one minute before the pulling out or plugging in
the connection wire.
8. When operating or installing LCD please don't subject the LCD
components to bending, twisting or extrusion, collision lest mishap
should result.
9. As most of the circuitry in LCD TV set is composed of CMOS
integrated circuits, it's necessary to pay attention to anti statics.
Before servicing LCD TV make sure to take anti static measure and
ensure full grounding for all the parts that have to be grounded.
10.There are lots of connection wires between parts behind the LCD
screen. When servicing or moving the set please take care not to
touch or scratch them. Once they are damaged the screen would be
unable to work and no way to get it repaired.
If the connection wires, connections or components fixed by the
thermotropic glue need to disengage when service, please soak the
thermotropic glue into the alcohol and then pull them out in case of
damage.
11.Special care must be taken in transporting or handling it. Exquisite
shock vibration may lead to breakage of screen glass or damage to
driving circuit. Therefore it must be packed in a strong case before
the transportation or handling.
12.For the storage make sure to put it in a place where the environment
can be controlled so as to prevent the temperature and humidity
from exceeding the limits as specified in the manual. For prolonged
storage, it is necessary to house it in an anti-moisture bag and put
them altogether in one place. The ambient conditions are tabulated
as follows:
Temperature
Scope for storage
Humidity Scope for operation
Scope for storage
13. Display of a fixed picture for a long time may result in
appearance of picture residue on the screen, as commonly
called "ghost shadow". The extent of the residual picture
varies with the maker of LCD screen. This phenomenon
doesn't represent failure. This "ghost shadow" may remain
in the picture for a period of time (several minutes). But
when operating it please avoid displaying still picture in high
brightness for a long time.
Points for attention during installation
1. The front panel of LCD screen is of glass. When installing it
please make sure to put it in place.
2. For service or installation it's necessary to use specified
screw lest it should damage the screen.
3. Be sure to take anti dust measures. Any foreign substance
that happens to fall down between the screen and the glass
will affect the receiving and viewing effect
4. When dismantling or mounting the protective partition plate
that is used for anti vibration and insulation please take care
to keep it in intactness so as to avoid hidden trouble.
5. Be sure to protect the cabinet from damage or scratch during
service, dismantling or mounting.
Scope for operation 0 ~ +50
-20 ~ +60
20% ~ 85%
10% ~ 90%
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