Sony KDP-57XBR2 - Digital High Definition Projection Tv, Руководство по обслуживанию

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10
2-8 SUB DECODER SUB
CONTRAST ADJUSTMENT (FOR
Y/C INPUTS)
1. Display 100 % color bars (480i, 7.5%
setup, Y/ C) signal through VIDEO 3
input. (White to Black Level Y : 714 ± 10
mVp-p, Burst Level C: 285 ± 10 mVp- p)
2. Connect an oscilloscope to CN005 pin
A1 (V_ MIDI_ Y) on the B board.
3. Enter the service mode and select
category “2103- 2”.
4. Adjust item #2 "SCON” so that the
waveform level is 1.400 ± 0.035Vp-p.
5. After adjustment is finished, press the
“MUTING” + “ENTER" buttons on the
remote to write the data to memory.
2-9 SUB DECODER SUB COLOR
AND SUB HUE ADJUSTMENT
(FOR Y/C INPUTS)
1. Display 100 % color bars (480i, 7.5%
setup, Y/ C) signal through VIDEO 3
input. (White to Black Level Y: 714 ± 10
mVp-p; Burst Level C: 285 ± 10 mVp-p).
2. Connect an oscilloscope to CN005 pin
A2 (V_ MIDI_ PB) on the B board.
3. Enter the service mode and select
category “2103- 2”.
4. Adjust item #3 "SCOL” and item #4
"SHUE” so that the waveform levels are
1.400 ± 0.040 Vp- p and 0.248 ± 0.035
Vp-p.
5. After adjustment is finished, press the
“MUTING” + “ENTER” buttons on the
remote to write the data to memory.
2-10 SUB DECODER SUB
CONTRAST ADJUSTMENT (FOR
COMPOSITE INPUT)
1. Display 100 % color bars (480i, 7.5%
setup, composite) signal through
VIDEO 1 input. (White to Black Level
714 ± 10 mVp-p, Burst Level 285 ± 10
mVp- p)
2. Connect an oscilloscope to CN005 pin
A1 (V_ MIDI_ Y) on the B board.
3. Enter the service mode and select
category “2103- 2”.
4. Adjust item #22 "2SCO” so that the
waveform level is 1.400 ± 0.035Vp-p.
5. After adjustment is finished, press the
“MUTING” + “ENTER" buttons on the
remote to write the data to memory.
2-11 SUB DECODER SUB COLOR
AND SUB HUE ADJUSTMENT
(FOR COMPOSITE INPUT)
1. Display 100 % color bars (480i, 7.5%
setup, composite) signal through VIDEO
3 input. (White to Black Level 714 ± 10
mVp-p; Burst Level 285 ± 10 mVp-p).
2. Connect an oscilloscope to CN005 pin
A2 (V_ MIDI_ PB) on the B board.
3. Enter the service mode and select
category “2103- 2”.
4. Adjust item #23 "2SCL” and item #24
"2SHU” so that the waveform levels are
1.400 ± 0.040 Vp- p and 0.248 ± 0.035
Vp-p.
Fig. 2-8
63.5 uS
1.400 ± 0.015 Vp-p
Y
Fig. 2-9
63.5 uS
PB
1.400 ± 0.04 Vp- p
C1
C2
C2 - C1 = 0.248 ±0.035
↕
↕
Fig. 2-10
63.5 uS
1.400 ± 0.015 Vp-p
Y