Sanyo HIGH-DEFINITION DIGITAL PLASMA TELEVISION DP50747 - Manual (Page 49)

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MENU OPTION— WHITE PAT TERN (PANEL REPAIR)
1 Press the MENU key to display the Main menu.
2 Use the CURSOR ▲▼ keys to highlight White
Pattern. Press ENTER.
3 Use the CURSOR
▲▼ keys to set White
Pattern Off or On.
Use this feature to repair the Plasma
screen.
If an afterimage occurs, use the White Pattern
feature immediately to repair the panel. The more severe
the afterimage, the longer the curing process may take. It
may be impossible to repair all cases of afterimage burn.
The sooner you remove a still picture and activate White
Pattern, the more likely it is that the panel can be repaired.
Notes: Afterimage (or image burn) is not covered under
warranty.
When the White Pattern is activated the screen
will instantly turn completely white. The On time is
automatically set for 30 minutes.
Pressing any key except Volume
▲▼, Mute, and
Audio will cancel the curing process and return the
DTV to normal viewing.