Sony KDP-57XBR2 Service Manual page 211

1.400 ± 0.015 Vp p and 1.490 ± 0.015
Vp- p.
5. After adjustment is finished, press the
"MUTING" + "ENTER " buttons on the
remote to write the data to memory.
A = 1.400 ± 0.015 Vp- p
B = 1.490 ± 0.015 Vp- p
Y
63.5 uS
PB
Fig. 2-2
2-3 MAIN Y/C LEVEL
ADJUSTMENT (FOR VDO SIGNAL
PATH)
1. Display 100 % color bars (480i, 0%
setup, component) signal through the
VIDEO 5 input. (White to Black Level:
Y = 714 ± 10 mVp- p, PB, PR = 700 ±
10 mVp-p).
2. Connect CN005 pin A9 (MN_ SB_ SW)
on the B board to 5 Vdc. Either side of
R3098 (1 ohm) on the A-board is a
good point to obtain 5 volts.
Tuner
A-board
3. Alternately connect an oscilloscope to
CN005 pin A1 (V_ MIDI_Y) and pin A2
(V_ MIDI_ PB) on the B board.
4. Enter the service mode and select
category "2103- 1".
5. Adjust item #0 "YLEV" and item # 1
"CLEV" so that the waveform are 1.400
± 0.015 Vp- p.
6. After adjustment is finished, press the
"MUTING" + "ENTER" buttons on the
7.
2-4 SUB Y/C LEVEL
ADJUSTMENT (FOR DRC SIGNAL
PATH)
1.
2.
3.
4.
5.
R3098
8
remote to write the data to memory.
A = 1.400 ± 0.015 Vp- p
Y
63.5 uS
PB
Fig. 2-3
Disconnect CN005 pin 9 from the 5
volt source.
Select TWIN picture mode, and display
100 % color bars (480i, 0% setup,
component) signal through VIDEO 5
input so that the bars appear in both
picture windows. (White to Black Level
Y : 714 ± 10 mVp- p, PB, PR : 700 ± 10
mVp- p)
Alternately connect an oscilloscope to
CN005 pin A5 (V_ DRCI_ Y), and pin
A6 (V_ DRCI_ PB) on the B board.
Enter the service mode and select
category "2103- 2".
Adjust item #0 "YLEV" and item #1
"CLEV" so that the waveform levels are
1.400 ± 0.015 Vp p and 1.490 ± 0.015
Vp-p.
After adjustment is finished, press the
"MUTING" + "ENTER " buttons on the
remote to write the data to memory.
A = 1.400 ± 0.015 Vp- p
B = 1.490 ± 0.015 Vp- p
Y
63.5 uS
PB
Fig. 2-4