Dynex DX-L37-10A Service Manual Download

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ATTENTION:

This service manual is only for service personnel to take

reference with. Before servicing please read the
following points carefully.

CAUTION:

Do not attempt to modify this product in any way.

Never perform customized installations without
manufacturer’s approval.
Unauthorized modifications will not only void the warranty,
but may lead to property damage or user injury.

Service work should be performed only after you are thoroughly
familiar with these safety checks and servicing guidelines.

AC voltage must be 120V +/ 10%, otherwise the power board will be
burned out with AC 220V supply.

INSTRUCTIONS

Be sure to switch off the power supply before replacing or welding any
components or inserting/plugging in connection wire. 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.
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.

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.

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.

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.

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:

Product Safety Servicing Guidelines

Temperature

Scope for operation

0 ~ +50

Scope for storage

-20 ~ +60

Humidity

Scope for operation

20% ~ 85%

Scope for storage

10% ~ 90%