Medion MD 31396, Руководство пользователя

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Do you need more help?
If the suggestions in the previous sections did not solve your problem, please contact us. To make it easier for us to
help you, please have the following information to hand:
• What external devices are connected?
• What messages appear on the screen?
• When operating the device, at which step did the problem occur?
• If you have a PC connected to the device:
• How is your computer confi gured?
• What software were you using when the problem occurred?
• What steps have you already taken to try and rectify the problem?
• Please provide us with your customer number if you have one.
Smart TV pixel faults
Despite the state-of-the-art production methods, in rare cases there
may be individual or multiple pixel drop-outs (dead pixels) due to the
highly complex technology.
For active matrix TFTs with a resolution of 3840 x 2160 pixels , which
are each made up of four sub-pixels (red, green, blue, white),
there are a total of
approx. 33.2 million control elements in use.
Occasionally pixels or individual sub-pixels can fail or become
incorrectly controlled because of this very high number of transistors
and the extremely complex manufacturing process used in this
context.
Pixel fault class
Defect type 1
Continuously
lit pixel
Defect type 2
Continuously
black pixel
Defect type 3
Defective sub-pixel
lit black
0 0 0 0 0
I 1 1 2
1
0
1
3
5
II 2 2 5
5-n*
0
0
2xn*
10
III 5 15 50
50-n*
0
0
2xn*
100
IV 50 150 500
500-n*
0
0
2xn*
1000
n*=1.5
The permitted number of defects for every type named above in each class of pixel defect refers to one million
pixels and must be converted accordingly to match the physical resolution of the display.
Your device complies with the European ISO 9241-307 Class II standard (pixel fault class). Pixel defects up to the
specifi ed maximum number are not covered by the warranty.
5 Pixel
blue
5 P
ix
e
l
Rows
Sub-Pixel
Pixel
green
red
white
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Troubleshooting