Sony TRINITRON PVM-14L3 Service Manual page 53

3-2-5. 33 k YPBPR SMPTE (709) Signal
Adjustment (Applicable for PVM-
D14L5J/D20L5J/14L5/20L5 only)
1, Input the 33 kHz/60Hz YPBPR SMPTE (709) 100 %
color bar signal fo 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 as shown in Fig. 3-20.
Make fiat
h
Fig. 3-20
4. Connect an oscilloscope to TP402.
5. Adjust PR/R BLACK (A2—95) data on the MENU so that
the pedestal portion becomes flat as shown in Fig. 3-21.
G-Y/R variable adjustment
G-Y/B variable adjustment
Make flat
0 +20 mV
Fig. 3-21
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 as shown in Fig. 3-22.
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.
mo,
G-Y/R variable adjustment
ers es
G-Y/B variable adjustment
Make flat
ae i ca 0 #20 mv
Fig. 3-22
PYM-14L4" 4L420L¢
Connect an oscilloscope to TP1351,
Adjust the PB LEVEL (A2—E0) data on the MENU so.
that the first step and the fourth step of the waveform
have the same amplitude as shown in Fig. 3-23.
Adjust for the same amplitude
0220 mV
Fig. 3-23
. Connect an oscilloscope to TP1451.
ll. Adjust the PR LEVEL (A2—B8) data on the MENU so
that the first step and the second step of the waveform.
have the same amplitude as shown in Fig. 3-24.
Adjust for the same amplitude
0420 mv
Fig. 3-24
3-7