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K Ypbpr Smpte (709) Signal Adjustment - Sony TRINITRON PVM-14L5 Service Manual

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8. Connect an oscilloscope to TP1351.
9. Adjust the PB LEVEL (A2_E4) data on the MENU so
that the first step and the fourth step of the waveform
have the same amplitude.
Fig. 4-18
10. Connect an oscilloscope to TP1451.
11. Adjust the PR LEVEL (A2_BC) data on the MENU
so that the first step and the second step of the wave-
form have the same amplitude.
Adjust for the same amplitude
0 ±20 mV
Fig. 4-19
4-6
Adjust for the same amplitude
0 ±20 mV
4-2-5. 33 k YPBPR SMPTE (709) Signal
Adjustment
1. Input the 33 kHz/60Hz YPBPR SMPTE (709) 100 %
color bar signal to the RGB/COMPONENT connector.
2. Connect an oscilloscope to TP302.
3. Adjust PB/B BLACK (A2_8E) data on the MENU so that
the pedestal portion becomes flat.
Make flat
Fig. 4-20
4. Connect an oscilloscope to TP402.
5. Adjust PR/R BLACK (A2_95) data on the MENU so that
the pedestal portion becomes flat.
G-Y/R variable adjustment
G-Y/B variable adjustment
Fig. 4-21
6. Connect an oscilloscope to TP1251.
7. Remove the difference in amplitudes between the first
step and the second step of the waveform with G-Y/B
(A2_A9) on the MENU.
Remove the difference in amplitudes between the
second step and the third step of the waveform with G-
Y/R (A2_9B) on the MENU. Repeat the adjustments
until the top peak portion becomes flat.
G-Y/R variable adjustment
G-Y/B variable adjustment
Fig. 4-22
Make flat
0 ±20 mV
Make flat
0 ±20 mV
PVM-14L5/20L5/D14L5A/D20L5A

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