Philips 47PFL3704D/F7, Service Manual

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6-2 PL9.0EA
The following adjustment normally are not
attempted in the field. Only when
replacing the LCD Panel then adjust as a
preparation.
1. White Balance Adjustment
Purpose: To mix red, green and blue beams correctly
for pure white.
Symptom of Misadjustment: White becomes bluish
or reddish.
Input Requirements
Input signal: CVBS (NTSC)
Pattern for White Point alignment:
- White 75%
Input Injection Point:
AV1
Alignment Method
1. Operate the unit for more than 12 minutes.
2. Set the color analyzer to the CHROMA mode and
bring the optical receptor to the center on the
LCD-Panel surface after zero point calibration.
Note: The optical receptor must be set
perpendicularly to the LCD Panel surface.
3. Enter the Service mode.
Note: To select menu or change the setting
values, use the Up/Down buttons. To enter the
setting, use the [OK] button or Right button.
4. Press the [MENU] button on the remote control
unit to select “TV Setting”, “Picture”, “Color
temperature” or “Cool” in order and set the “Color
temperature” to “Cool”.
5. Press the [MENU] button on the remote control
unit to return the service mode initial display.
6. Select the “RGB Align” and “Cool” in order and set
the “R offset”, “G offset” and “B offset” to 0.
7. Set the “R Gain”, “G Gain” and “B Gain” to
maximum value.
8. Adjust one or two of the three Red, Green, Blue
Gain to obtain the target “Cool” x,y values as
stated in the Table A keeping at least one of Red,
Green, Blue Gain value at the maximum value.
9. Select “Store” to store selected values into NVM.
10. Change the selection to “Normal” or “Warm” in
step 4 and repeat from step 5.
Table A
Cool X y
Target 0.276 0.277
Tolerance ±0.004 ±0.004
Normal X y
Target 0.289 0.291
Tolerance ±0.004 ±0.004
Warm X y
Target 0.314 0.319
Tolerance ±0.004 ±0.004