RCA L37WD250 - HOW TO ENTER SERVICE MODE - CONNECTOR VOLTAGES - ALIGNMENTS
RCA L37WD250 - RCA L42WD250 - RCA L46WD250 - Service Mode - Connector Voltages
SERVICE MODE
Entering the Factory Service mode
Turn the instrument OFF.
Then press the Vol - button on the remote
and Vol - on the keypad simultaneously.
Hold the buttons for approximately 10 seconds until the instrument turns ON.
Using the
remote if you want to select an item, press the ▲▼ buttons.
Adjust the setting value using the ◄► key.
Press the Clear button to return to the
main menu after adjusting a value.
Press the Clear button or select Go Back the menu to exit the Factory Service mode.
Press the Clear button or select Go Back the menu to exit the Factory Service mode.
BRIGHTNESS ALIGNMENT
Enter the Factory Service mode.
Select VIDEO from the menu, then select Brightness.
Insert a pluge test pattern thru RF with a 2% setup background with a 0% and 4% bar.
Adjust the Brightness so that the 0% bar is invisible with the 4% bar visible.
Exit the Factory Mode by pressing Clear on the remote.
Select VIDEO from the menu, then select Brightness.
Insert a pluge test pattern thru RF with a 2% setup background with a 0% and 4% bar.
Adjust the Brightness so that the 0% bar is invisible with the 4% bar visible.
Exit the Factory Mode by pressing Clear on the remote.
PEAK WHITE LEVEL ADJUSTMENT
The Peak White alignment must be completed
to the following standards.
Enter the Factory Service mode.
Select VIDEO from the menu, then select Peak White.
Input a test pattern with a 100% white centered pad on a dark background.
Using a Color TV Analyzer measure the luminance level (Y[nit]) of the white pad. Adjust with the Scaling Contrast the Light Output Level (PW Level) for 400 Nits + 20%/- 10%.
Enter the Factory Service mode.
Select VIDEO from the menu, then select Peak White.
Input a test pattern with a 100% white centered pad on a dark background.
Using a Color TV Analyzer measure the luminance level (Y[nit]) of the white pad. Adjust with the Scaling Contrast the Light Output Level (PW Level) for 400 Nits + 20%/- 10%.
DEFECTIVE PIXEL SPECIFICATION
A pixel is defined as three elements or
dots, one red, one blue, and one green. Thus one bright pixel is three bright adjacent
dots. No bright pixels are allowed but 3 bright dots are allowed subject to the
following:
The bright dots must be viewable on normal program material (not static test patterns) when viewed at a distance of five feet from a point perpendicular to the center of the screen at eye level. The panel is considered defective if the pixels are viewable and they are within ¼” of another bright dot.
Also, no more than eight dark dots, and no dark pixels will be accepted when viewed under the same conditions.
The bright dots must be viewable on normal program material (not static test patterns) when viewed at a distance of five feet from a point perpendicular to the center of the screen at eye level. The panel is considered defective if the pixels are viewable and they are within ¼” of another bright dot.
Also, no more than eight dark dots, and no dark pixels will be accepted when viewed under the same conditions.
VIDEO ALIGNMENT
The Cut Off alignment is used to define
the color coordinates for low level luminance. The White point is used to
define the color coordinates for bright luminance This alignment must be
completed using Line Input (CVBS).
1. Enter the Factory Service mode.
2. Select VIDEO from the menu, and then select Normal from the Color Temperature sub-menu.
NOTE: It is only necessary to perform the Cut Off and White Point Alignments with the Color Temperature set to the Normal position. The values for Cool and Warm are interpolated based on the Normal settings.
3. Insert a grey test pattern with a 10 to 20 Nits luminance level.
4. Using a Color TV Analyzer measure the coordinates at the center of the screen. Adjust Red Offset, B Offset and Green Offset for x = 0.280 +/- 5%, y = 0.290 +/- 5%
5. Insert a 50IRE (or 150 nits) grey test pattern.
6. Using a Color TV Analyzer measure the coordinates at the center of the screen. Adjust R Gain, G Gain and B Gain for x = 0.280 +/- 5%, y = 0.290 +/- 5%.
NOTE: It may necessary to switch between the Cut Off and White Point Alignments in order to achieve the proper alignment. Exit the Service Menu by press the Clear button on the remote.
2. Select VIDEO from the menu, and then select Normal from the Color Temperature sub-menu.
NOTE: It is only necessary to perform the Cut Off and White Point Alignments with the Color Temperature set to the Normal position. The values for Cool and Warm are interpolated based on the Normal settings.
3. Insert a grey test pattern with a 10 to 20 Nits luminance level.
4. Using a Color TV Analyzer measure the coordinates at the center of the screen. Adjust Red Offset, B Offset and Green Offset for x = 0.280 +/- 5%, y = 0.290 +/- 5%
5. Insert a 50IRE (or 150 nits) grey test pattern.
6. Using a Color TV Analyzer measure the coordinates at the center of the screen. Adjust R Gain, G Gain and B Gain for x = 0.280 +/- 5%, y = 0.290 +/- 5%.
NOTE: It may necessary to switch between the Cut Off and White Point Alignments in order to achieve the proper alignment. Exit the Service Menu by press the Clear button on the remote.
CONNECTOR VOLTAGES
CLICK ON THE PICTURES TO ZOOM IN
