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Main Decoder Pb And Pr Offset Adjustment; Sub Decoder Pb And Pr Offset Adjustment; Blue Offset Adjustment; Sub Contrast Adjustment - Sony KDP-57XBR2 Service Manual

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Table of Contents
4-12. MAIN DECODER PB AND PR OFFSET
ADJUSTMENT
1. Receive the all white (480i, 7.5% setup, composite) signal with
VIDEO 1 input. (White to Black Level : 714 ±10 mVp-p)
2. Connect the oscilloscope between CN005 <
A
j pin (V_DRCI_PR) on the B board and ground.
<
3. Set in the service mode and select the category "2103-1".
4. Adjust "20 CBOF" and "21 CROF" so that the waveform
level is 0.000 ±0.003 Vp-p.
5. After adjustment finished, press "[MUTING]" + "[ENTER]"
buttons on the commander to write the data to the NVM.
6. Turn the all white (480i, 0% setup, component) signal with
VIDEO 5 input.
(White to Black Y : Level : 714 ±10 mVp-p, Pb,Pr : 0 Vp-p)
7. Adjust "20 CBOF" and "21 CROF" so that the waveform
level is 0.000 ±0.003 Vp-p.
8. After adjustment finished, press "[MUTING]" + "[ENTER]"
buttons on the commander to write the data to the NVM.
PB,PR
H sync
63.5 µs
Fig. 4-12
4-13. SUB DECODER PB AND PR OFFSET
ADJUSTMENT
1. Receive the all white (480i, 7.5% setup, composite) signal with
VIDEO 1 input. (White to Black Level : 714 ±10 mVp-p)
2. Connect the oscilloscope between CN005 <
<
A
d pin (V_MIDI_PR) on the B board and ground.
3. Set in the service mode and select the category "2103-2".
4. Adjust "20 CBOF" and "21 CROF" so that the waveform
level is 0.000 ±0.003 Vp-p.
5. After adjustment finished, press "[MUTING]" + "[ENTER]"
buttons on the commander to write the data to the NVM.
PB,PR
H sync
63.5 µs
Fig. 4-13

4-14. BLUE OFFSET ADJUSTMENT

1. Receive the all black (1080i, component) signal with VIDEO 5
2. Connect the oscilloscope between CN3009 7 pin (B) on the
h pin (V_DRCI_PB),
A
3. Set in the service mode and select the category "2150D-2".
4. Adjust "3 SLIN" so that the waveform level is 2.20 ±0.05 Vp-p.
5. After adjustment finished, press "[MUTING]" + "[ENTER]"
6. Receive the RF signal and change the wide mode to "Wide Zoom".
Reference Pulse
GND
0.000 ±0.003 Vp-p

4-15. SUB CONTRAST ADJUSTMENT

1. Receive the 1/25 window (1080i, component) signal with
2. Connect the oscilloscope between CN3009 6 pin (G) on the
3. Set in the service mode and select the category "2150P-4".
4. Adjust "0 SCON" so that the waveform level is 2.30 ±0.05 Vp-p.
5. After adjustment finished, press "[MUTING]" + "[ENTER]"
6. Receive the 1/25 window (1080i, DTV) signal.
A
s pin (V_MIDI_PB),
7. Adjust "0 SCON" so that the waveform level is 2.30 ±0.05 Vp-p.
8. After adjustment finished, press "[MUTING]" + "[ENTER]"
0.000 ±0.003 Vp-p
– 49 –
K
input, and set PICTURE to maximum.
A board and ground.
buttons on the commander to write the data to the NVM.
Copy the same data to "3 SLIN".
16.7 ms
Fig. 4-14
VIDEO 5 input, and set PICTURE to maximum.
A board and ground.
buttons on the commander to write the data to the NVM.
buttons on the commander to write the data to the NVM.
29.63 µs
Fig. 4-15
KDP-57XBR2/65XBR2
RM-Y185
2.20 ±0.05 Vp-p
2.30 ±0.05 Vp-p

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