White Balance Adjustment - Sony VPH-G90U Service Manual

3-6. WHITE BALANCE ADJUSTMENT

3-6-1. Preparations
Equipment required
VPH-G90 (Focus, size, registration, and lens focus had
been adjusted completely.)
W/B checker: Philips PM5639/10
Test signal generator: Tektronix TSG-100 or
equivalent
Note: If test signal generator is
Color temperature setting range
9300 dK/6500 dK/5400 dK/3200 dK + 8MPCD
1. Attach a lens-ball of the W/B checker to the lens.
2. Connect a test signal generator.
If there is no test signal generator, use the test signals
generate inside the unit. Press the W/B GAIN key,
select 100 IRE White, then select 10 IRE with W/B
BIAS key.
3. Press the ON/OFF key on the W/B checker.
Buttons on the Display Unit
RGB
FUNCT
ON/OFF
PM 5639 display unit
4. Press the FUNCTION key of the W/B checker, select
"White reference" with
ENTER key.
FUNCTION
Function
Status
White reference
Conversion
Exit
VPH-G90E/G90U/G90M
not available, use
internal test signal.
ENTER
CIE ZOOM
RECALL STORE
ILLUM RESET
, keys, then press the
5. Select "1: fty. Ref" from the "White reference" menu
with , keys, then press the ENTER key.
White reference
1 : fty. Ref
2 : , ,
3 : , ,
6. Press the RGB key, select "R&B/G" with
then press the ENTER key.
RGB key function
RGB
R&B/G
G&B/R
R&G/B
RGB/mean
RGB/XXXXXUuit
7. Color temperature and bars indications of the W/B
checker are as follows:
Color
Temp.
R G
9300 50 100
6500 60 100
5400 60 100
3200 90 100
0
RED
GREEN
BLUE
Bars display
, keys,
B x y
60 0.283 0.297
40 0.313 0.329
30 0.335 0.349
10 0.427 0.408
Unit: mm
100 200
3-15