Service manual

LC-40E67U/LC-40E77U
5 – 23
6.3. Tuner/V-Chip test
7. Adjustment of white balance
Adjustment item Adjustment conditions Adjustment procedure
1 Adjustment NTSC RF signal
US-7 (AIR) ch
Feed the NTSC signal to RF ANTENNA input.
2 Auto adjustment
performance
Bring the cursor on [OTHERS]→[OTERRS2]→[.TUNER VCHIP TEST (*07ch)]
and press [LEFT]. (*Select the channel according to the RF signal.)
[.A-OK (***.**)/VM-OK] appears in blue when finished. (If [A-NG/VM-NG] appears
in yellow or red, the test is incomplete.)
Make sure a displacement of ±0.0625 MHz from the center frequency is accept-
able.
Adjustment item Adjustment conditions Adjustment procedure
1 Setting Backlight: +16
(MAX)
For detailed adjustment procedure refer to “Kameyama Model Integral WB Adjustment
Specifications”.
1) Make the following settings for the set.
AV MODE: [DYNAMIC]
Backlight: +16
Aging time: Min. 60 minutes
2) Connect the white balance adjustment tool to the set.
3) The cross is displayed by execute command of RS232C and the probe position is set
to the center of the screen (please attention the operation manual of CA210).
4) The cross is disappeared by execute command of RS232C.
Adjusting the picture by execute command of RS232C
2 Automatic
adjustment
execution
[Adjustment procedure]
1) Using the remote controller, transmit the “monitor adjustment process” code.
2) Set the 2nd point to the specified gradation level, With the strongest color being fixed,
turn down the R,G and B settings to their reference levels.
3) Set the 1st point to the specified gradation level.
Correct the G setting (388 x 2nd point G setting /804) (rounded off), and make the R
and B settings to their reference levels.
*Initial R, G and B settings at point 2: Gradation level set at 804
* Initial R and B settings at points 1: Correct the setting same remainder of RGB setting
at each point (This is because the adjustment is made to achieve the same remainder of
RGB setting/4 at each point).
[Adjustment value]
As per the “standard set” submitted by Engineering Department.
[Adjustment reference] Instrument: [Minolta CA-210] Engineering instrument.
Level Reference Adj. spec Ins. spec
Point 2 804
X=0.272
±0.001 ±0.002
y=0.277
Point 1 388
X=0.272
±0.002 ±0.004
y=0.277
Note Set conditions for inspection
AV MODE: [DYNAMIC] (Reset)
Aging Time: Min. 60 minutes