52
MIS-4220 / MIS-4220R / MIS-4230
53
Infinitely Expandable
7.1. Before calling for service
Before calling for any repair, check the following and then refer to a near A/S center.
7. Other tips
▶"Tick" sound from the main body.
If there is no problem with the screen or sound, the “tick” sound is likely to result
y
from the cabinet lightly shrinking with the change of room temperature. The sound
does not affect product’s performance.
▶no image at upper and lower part of the screen.
As for a screen which is over 16:9 in width (such as cinema-sized one), no image
y
may be displayed at upper and bottom part of the screen.
▶Speckles or white lines on the screen
Check whether the problem is caused by vehicle, streetcar, high-voltage cable or
y
neon sign, which emitting interference wave or electromagnetic induction. Avoid any
interfering object.
▶Screen or a PDP Set is hot
PDP sets or screen can be hot, because basic principle of PDP driving is Plasma
y
discharge between electrodes.
It is not a defect or a malfunction of the product, you may continue to use the product.
y
7.2. about Plasma display panel
The followings are phenomena caused by characteristics of the plasma display panel.
Since it is not a fault, you may continue to use the product.
▶Black or twinkling spots on the screen
Although the plasma display panel is manufactured with high-precision
y
technology, there may exist black or twinkling spots on the screen.
Since it is not a fault, you may continue to use the product.
▶Burn-in effect
Displaying static images such as still video frames or computer screen
y
images for an extended period of time may cause burn-in effect.
The burn-in effect may be gradually reduced by displaying full white
pattern.
However, please always be careful in using static images on this product,
y
because such burn-in effect may cause permanent damages in some
cases.
▶noise from the inside
When you turn on the product slight buzzing sound may be heard
y
from the rear of display panel. Since it is not a fault, you may continue
to use the product.
▶Screen decolorization
Optical film that is attached on the panel can be slightly decolorized
y
after long time of use. The degree of decolorization may vary
depending on display contents and conditions.
It is due to the characteristics of the film, but it is not a defect.
(It is caused by chemical characteristics of the film.)
Caution
Caution
Caution
Caution
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