Sony KD-75X7800F Service Manual page 7

To reduce the risk of image retention:
•Fill the screen by changing [Wide mode] to eliminate the black bars.
Select [Wide mode] other than [Normal].
•Turn off the OSD (On Screen Display) by pressing the DISPLAY button,
and turn off the menus from connected equipment. For details, refer to
the instruction manuals for the connected equipment.
•Avoid displaying static images with bright colours (including white),
clocks or logos on any portion of the screen.
•Set the picture settings based on the ambient conditions. The Standard
Picture is recommended for home use and when viewing content that
often displays the station logos, etc.
The TV has following features to help reduce/ prevent image retention.
Press the HOME button, then select [Settings] – [Picture & Display] –
[Expert panel settings] – the desired option.
Panel refresh
Panel refresh will automatically run to adjust the uniformity of the TV
screen after it has been in use for long periods of time.
Panel refresh can also be performed manually and should only be used if
image retention is very noticeable or you see the following message:
[Panel refresh did not finish...]
Caution:
•The Panel refresh function may affect the panel. As a reference, perform
the Panel refresh only once a year, do not perform it more than once a
year as it may affect the usable life of the panel.
•Panel refresh takes about one hour to complete.
•A white line may be displayed on the screen during the Panel refresh,
this is not a malfunction of the TV.
•Panel refresh will only work when the room temperature is between 10
ºC and 40 ºC.
Pixel shift
Automatically moves the image on the screen to prevent image retention.
Other feature
The screen brightness is automatically reduced when displaying still
images, clocks, bright colours or logos etc.
IMPORTANT REMINDER FOR OLED PANEL REPLACEMENT
When carrying out OLED panel replacement, it is mandatory of a
service center to confirm and record Panel ON time & Panel
Refresh times.
It is because they are indispensable information in order to clarify
responsibility for image retention after panel replacement.
Please refer to the chapter of SELF DIAGNOSIS FUNCTION in this
service manual to find out how to confirm the Panel ON time &
Panel Refresh times in service mode.
1-3. Caution About the Lithium Battery
1) Danger of explosion if battery is incorrectly replaced. Replace only with
the same or equivalent type.
2) Outer case broken battery should not contact to water.
1-4. Safety Check-Out
After correcting the original service problem, perform the following
safety checks before releasing the set to the customer:-
1) Check the area of your repair for unsoldered or poorly soldered
connections. Check the entire board surface for solder splashes and
bridges.
2) Check the inter board wiring to ensure that no wires are pinched or
contact high-wattage resistors.
3)Check all control knobs, shields, covers, ground straps and mounting
hardware have been replaced. Be absolutely certain you have replaced
all the insulators.
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SYS SET