Sub-Brightness Adjustment; Neutral White Balance Adjustment; Cool White Balance Adjustment - Sony KDP-57XBR2 Service Manual

6. Select category "2103-2".
7. Adjust item #2 "SCON" so that the right
side waveform level is 1.59 ±0.05 Vp-p.
8. After adjustment is finished, press the
"MUTING" + "ENTER" buttons on the
remote to write the data to memory.
1.59 ±0.05 Vp-p
29.63 uS
Fig. 2.17
2-18 RF SUB COLOR AND SUB
HUE ADJUSTMENT
1. Display the TWIN mode by pressing
the button on the remote, then set
PICTURE to maximum and COLOR to
50%
2. Display 75 % color bars (RF) signal
through the VHF-UHF input, and tune
both picture windows to the same
channel that the color bar generator is
set to.
3. Connect an oscilloscope to CN3009
pin 7 (B) on the A board.
4. Select category "2103-1".
5. Adjust item #3 "SCOL" and #4 "SHUE"
so that the left side waveform levels are
as follows: VB1 = VB4 and VB2 = VB3.
6. Select category "2103-2".
7. Adjust item #3 "SCOL" and #4 "SHUE"
so that the right side waveform levels
are as follows: VB5 = VB8 and VB6 =
VB7.
8. After adjustment is finished, press the
"MUTING" + "ENTER" buttons on the
remote to write the data to memory.
VB4
VB2
VB3
VB1
29.63 uS
Fig. 2.18
VB8
VB6
VB7
VB5
2-19 SUB-BRIGHTNESS
ADJUSTMENT
1. Enter the service mode and display the
internally generated 1080i all-black
pattern (refer to section 2-23 for details
on displaying this pattern).
2. Set the picture level to minimum, then
make the room as dark as possible.
3. Select category "2150P-1".
4. Adjust item #3 "SBRT" so that the
picture is all black without any faint
glowing of the screen.
5. After adjustment is finished, press the
"MUTING" + "ENTER" buttons on the
remote to write the data to memory.
2-20 NEUTRAL WHITE BALANCE
ADJUSTMENT
1. Enter the service mode.
2. Display an all-white raster through any
video input
3. Set the color temperature to NEUTRAL.
4. Set the color to minimum
5. Select adjustment category "2150P-1"
6. Alternately adjust item # 4 "RDRV" and
item # 6 "BDRV" to remove any color tint
from the white picture.
7. Display a 30 IRE raster (dark gray).
8. Alternately adjust item # 7 "RCUT" and
item # 9 "BCUT" to remove any color tint
from the gray picture.
9. After adjustment is finished, press the
"MUTING" + "ENTER" buttons on the
remote to write the data to memory.
2-21 COOL WHITE BALANCE
ADJUSTMENT
1. Enter the service mode.
2. Display an all-white raster through any
video input.
3. Set the color temperature to COOL.
4. Set the color to minimum.
5. Select adjustment category "2150P-1".
6. Alternately adjust item # 12 "RDOF" and
item # 14 "BDOF" to give the white
picture a slight bluish tint.
7. Display a 30 IRE raster (dark gray).
8. Alternately adjust item # 7 "RCOF" and
item # 9 "BCOF" to give the gray picture
a slight bluish tint.
13