Service manual

-33-
6. Adjusting Method
Figure 6-1 Step Gray Scale Pattern
2) Check initial data from USER CONTROL (refer to 5-1)
3) In order to start Service mode, press button in following order “ Vol -> Mute -> Recall
(Display) -> Mute” of the remote control. And then select PW181-1 for checking initial data of
the SERVICE MODE (refer to 5-2).
4) Attach the sensor of White Balance Meter (CA-100) to the 80% white level of the screen.
5) Adjust White Balance by controlling R, G, B GAIN.
.
Control R, G, B GAIN values so that the ranges are within DP (Default Value)
10. If the gains
are deviated from the range, the SET is disqualified.
.
Set color coordinate to x=0.285
0.005, y=0.275 0.005, and the Color Temperature to greater
than 10,000
K.
6) Attach the sensor of White Balance Meter to 40% of white level on the screen
7) Adjust White Balance by varying the values of R,G, B BIAS.
.
Control R, G, B BIAS values so that the ranges are within “Default Value”
5. If deviate from
the range, classify the SET disqualified.
.
Set color coordinate to x=0.285
0.005, y=0.285 0.005.
8) Repeat from 4) to 7) until color coordinate is x=0.285
0.005, y=0.275 0.005, and then adjust
Sub Contrast for that the luminance is above or equal to 150 Cd/m
2
when the sensor of White
Balance Meter is attached to 100% of white level on the screen.
9) To exit the Service mode, press Menu button of the remote control.
6-1. WHITE BALANCE Adjustment
1) Apply 5 Step Gray Scale pattern to Video input terminal (Pattern generator: MIK 7253S)