Sony KDP-57XBR2 Service Manual page 214

5. After adjustment is finished, press the
"MUTING" + "ENTER" buttons on the
remote to write the data to memory.
C2 - C1 = 0.248 ±0.035
↕
C2
C1 ↕
PB
63.5 uS
Fig. 2-11
2-12 MAIN DECODER PB AND PR
OFFSET ADJUSTMENT
1. Display a white raster (480i, 7.5% setup,
composite) signal through VIDEO 1
input. (White to Black Level 714 ± 10
mVp-p).
2. Connect an oscilloscope to CN005 pin
A6 (V_ DRCI_ PB) and pin A7 (V_
DRCI_ PB) on the B board.
3. Enter the service mode and select
category "2103- 1".
4. Adjust item #20 "CBOF" and item #21
"CROF" so that the waveform levels are
0.000 ±0.003 Vp-p.
5. After adjustment is finished, press the
"MUTING" + "ENTER" buttons on the
remote to write the data to memory.
6. Display a white raster (480i, % setup,
component) signal through VIDEO 5
input (White to Black Level Y:714 ± 10
mVp-p; PB and PR: 0 Vp-p).
7. Adjust item #20 "CBOF" and item #21
"CROF" so that the waveform levels are
0.000 ±0.003 Vp-p.
8. After adjustment is finished, press the
"MUTING" + "ENTER" buttons on the
remote to write the data to memory.
PB, PR
H sync
63.5 uS
Fig. 2-12
1.400 ± 0.04 Vp- p
0.000 ±0.003Vp- p
11
2-13 SUB DECODER PB AND PR
OFFSET ADJUSTMENT
1. Display a white raster (480i, 7.5% setup,
composite) signal through VIDEO 1
input. (White to Black Level 714 ± 10
mVp-p).
2. Connect an oscilloscope to CN005 pin
A2 (V_ MIDI_ PB) and pin A3 (V_ MIDI_
PR) on the B board.
3. Enter the service mode and select
category "2103- 2".
4. Adjust item #20 "CBOF" and item #21
"CROF" so that the waveform levels are
0.000 ±0.003 Vp-p.
5. After adjustment is finished, press the
"MUTING" + "ENTER" buttons on the
remote to write the data to memory.
PB, PR
H sync
63.5 uS
Fig. 2-13
2-14 BLUE OFFSET
ADJUSTMENT
1. Display an all black (1080i, component)
signal through VIDEO 5 input, and set
PICTURE to maximum. An HDTV
pattern generator is required for this.
2. Connect an oscilloscope to CN3009 pin
7 (B) on the A board.
3. Enter the service mode and select
category "2150D- 2".
4. Adjust item #3 "SLIN" so that the
waveform level is 2.20 ±0.05 Vp-p.
Make a note of the data you just
adjusted for "SLIN".
5. After adjustment is finished, press the
"MUTING" + "ENTER" buttons on the
remote to write the data to memory.
6. Tune the set to any VHF-UHF or cable
channel and change the display mode to
WIDE ZOOM.
7. Set the data of item #3 "SLIN" so that it
is the same value that was set in
step # 4.
0.000 ±0.003Vp- p