Sony KF-60XBR800 Manual page 7

These settings are used to set the white balance (color of gray). This is the
most difficult adjustment to make.
2170P-1 (Category)
RDRV (Red Gain)
GDRV (Green Gain)
BDRV (Blue Gain)
RCUT (Red Bias)
GCUT (Green Bias)
BCUT (Blue Bias)
An instrument free procedure for adjusting white balance:
1. Place a bright gray window (70-90 IRE) on the screen from AVIA or VE.
2. Go to category 2170P-2 and item RGBS and set the value to 6 (turns off
blue).
3. Adjust GDRV until the window looks pure yellow (not green or red tinted). I
record the values where it looks slightly green and red and then try the
values near the middle of those.
4. Place a gray scale ramp (100-0 IRE) on the screen.
5. Adjust GCUT and/or RCUT if you see a problem with low IRE yellows.
This is difficult to judge.
6. Go back to step one if you changed GCUT or RCUT.
7. Go to category 2170P-2 and item RGBS and set the value to 7 (all panels
on).
8. Change the gray window to a value of around 70-50 IRE. Do not use an
IRE value less than 30 because of probable problems with the panels not
tracking well at low levels.
9. Set BDRV to zero and then increase BDRV until the screen just looks gray
and stop. I use a photographic gray card with either indirect outside
lighting or a 6500K light source to judge this. Be very careful not to make
the grays overly blue. Many people think 6500k grays are slightly sepia
toned.
10. Place a gray scale ramp (100-0 IRE) on the screen.
11. Adjust BCUT if you see a problem with low IRE grays.
12. Go back to step 8 if you changed BCUT.
13. Readjust the color decoder if you have done this previously.
14. Write the results to memory and copy to other inputs if you like the results
if not just change the input and everything will go back to normal.
Note: Here are some readings at D6500 with a light meter (AEMC CA813)
using Avia filters that could be useful to others: Blue – 6.84% of Green, Red –
61.8% of Green. This ratio should be close for all of these sets.
Composite Component
40
44
48
26
22
17
6 of 12
1/31/03
(From Color Analyzer)
DVI
40 40
44 44
48 48
26 26
22 22
17 17
High IRE adjustment
High IRE adjustment
High IRE adjustment
Low IRE adjustment
Low IRE adjustment
Low IRE adjustment