XOCECO PS42K8, Service Manual

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by convection, with the round hole on the top for heat emission. To avoid overheat, please
do not have any covering on the hole during normal operation and never put it in the place
where the space is narrow and in bad ventilation.
10).There are quite a number of circuits in PDP that are integrated ones. Please be on
guard against static electricity. During maintenance operation be sure to cover yourself with
anti-static bag and before operation make sure to have it sufficiently grounded.
11).There are a big number of connection wires distributed around the screen. Please take
care not to touch or scuff them during maintenance or removing the screen, because once
they are damaged the screen will fail to work and it’s not possible to repair it.
12). Connector for the circuit board of the screen part is relatively fine and delicate. Please
take care in the replacement operation lest it should get damaged.
13).Special care must be taken during transportation and handling because strenuous
vibration could lead to screen glass breakage or damage on the driving circuitry. Be sure to
use a strong outer case to pack it up before transportation or handling.
14).Please put it for storage in an environment in which the conditions are under control so
as to prevent the temperature and humidity from exceeding the scope stipulated in the
specification. For prolonged storage please cover it with anti-moisture bag and have them
piled and stored in one place. The environmental conditions are tabulated as below:
Temperature
Scope for operation
0
～
50centigrade
Scope for storage -15
～
60centigrade
Humidity Scope for operation 20%
～
80%
Scope for storage 20%
～
80%
15). If a fixed picture is displayed for a long time, difference in its brightness and color may
occur compared with movable pictures. But it doesn’t show any problem and the reason is
that there is reduced density of fluorescent powder in the former. On the other hand, even if
changes take place in the picture, it can keep its brightness for a period of time (several
minutes). It’s a feature inherent with plasma and it’s not abnormal. However please try as
much as possible to avoid showing a still picture of high brightness for a long time during
operation.
16). As a digitalized display devise, this module is provided with error diffusion technology
and the gray scale and
false enhancement of contour can be displayed by reusing of
sub-field. As compared with cathode ray tube, it can be found in the moving picture that at
the brim of the face of a person there are some wrong colors.
17). During the display of graph (indicating the gradual change in brightness horizontally or
vertically) resulting from gray scale test it can be found that the brightness for the two
adjacent levels is uneven. This is caused by the reuse of sub-field, the display of load
rectification and the eletrolyzation.
18).The screen front plate is of glass. Please make sure that the screen has been put in
place during erection. If it is not in place before the erection begins it may lead to screen
crack or breakage.
19).Make sure the screw used in the mounting of the screen is of the original specs lest it
should cause damage to the screen due to mismatch. Special care should be taken not to
use too long or too big screw.