PDP-507CMX
121
5
6
7
8
5
6
7
8
C
D
F
A
B
E
5.4 NON-FAILURE SYMPTOMS
2000
700
APL (average picture level)
1. Function of lowering the luminance level (Information on symptoms that are not failure)
High-temperature protection function
If the temperature reaches 70
°
C, the limit of the maximum count of plasma discharge is gradually lowered, in order to prevent overheating.
• Temperature control is performed based on the temperature value of TEMP1.
• The maximum count of plasma discharge is decreased by 8 every 5 seconds.
• The lowest limit of the maximum count of plasma discharge is about 700.
• The maximum count of plasma discharge will increase gradually once the temperature of the unit is lowered to a specified temperature.
Panel protection function 1 (for preventing burn-in during Still Picture mode)
If Still Picture mode is continued for 3 minutes or more, the limit of the maximum count of plasma discharge is gradually lowered, in order to
reduce burn-in on the display.
• Whether the image displayed is a still picture or not is detected, and the Panel Protection Function will be activated (Even if the mouse
pointer is moved on a still picture, that picture is judged as a still picture.)
• The maximum count of plasma discharge is decreased by 8 every 5 seconds.
• The lowest limit of the maximum count of plasma discharge is about 700. (It takes about 15 minutes to reach the lowest limit, although it
depends on what is displayed on the screen.)
• If the image is changed to an animated picture, the maximum count of plasma discharge is gradually increased.
Note:
How to lower the luminance level is the same as that for the high-temperature protection function 1.
Panel protection function 2 (for protecting the SCAN IC)
If a particular load is added on the SCAN IC locally, as shown in the figure
on the right, the limit of the maximum count of plasma discharge is
gradually lowered.
Note:
How to lower the luminance level is the same as that for the high-
temperature protection function 1.
Panel Protection Function 3
(for protecting the panel from cracking)
The heating value for a bright window part on the screen, as shown in the
figure on the right, is high. So, if such a pattern is recognized, the limit of
the maximum count of plasma discharge is gradually lowered.
Note:
How to lower the luminance level is the same as that for the high-
temperature protection function.
Maxim
um count of plasma discharge
Example:
A display with which the SCAN IC
protection function is to be activated
Example:
A display with which the panel-
cracking protection function is to be
activated
High-temperature protection
function 1, 2, 3
The maximum count of plasma
discharge is decreased if the
unit reaches 70
°
C or higher.
Содержание PDP 507CMX
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Страница 208: ...PDP 507CMX 208 1 2 3 4 1 2 3 4 C D F A B E THC63LVD104AF K IC101 LVDS ASSY LVDS Receiver Block Diagram Pin Function ...
Страница 209: ...PDP 507CMX 209 5 6 7 8 5 6 7 8 C D F A B E MP2367DN LF IC302 DD ASSY Converter IC Block Diagram Pin Function ...
Страница 210: ...PDP 507CMX 210 1 2 3 4 1 2 3 4 C D F A B E NCP5211BDG IC303 DD ASSY Regulator IC Block Diagram Pin Function ...