Sony PVM-20M2U Service Manual page 35

10-9. NTSC 443 B-Y PHASE
NTSC 443 CHROMA NOR
Note : Be sure to set ACC in the ON position before this adjust-
ment.
Note: Remove HV.DELAY before this adjustment.
1) Input an NTSC 443 color bar.
2) Connect the probe of an oscilloscope to TP402.
3) Set the unit in the service mode.
4) While tracking by means of
IB-YPHASENTSC443I
and
ICHROMANTSC443NORf,
make adjustment so that the peaks of
waveforms will be the same. (Fig.5-22)
Make B and C flush with
each other
by
PHASE.
Fig. 5-22
10-10. NTSC 443 CHROMA (ACC OFF)
Note : 10-10. is not applicable to the group of models 3.
1) Conduct ACC OFF via MENU.
2) Adjust [CHROMA NTSC 443 ACC OFF] in the same way as
10-9-4). (Fig.5-23)
Make A and D flush with each other.
~
20mVmax.
A
D
t
Fig.5-23
10-11. NT 443 R-Y LEVEL
Note : Be sure to set ACC in the ON position before this adjust-
ment.
1) Input an NTSC 443 color bar.
2) Connect the probe of
an
oscilloscope to TP401.
3) Set the unit in the service mode.
4) Ad just
IR-Y LEVEL NTSC 4431
in the same way as I 0-6-4 ). (Fig.5-
24)
Make adjustment so that B =D. (20 mV max.) Check that the
difference between B and C is 60 m V or less.
IC404@PIN
60mVmax.
20mVmax.
Fig.5-24
10-12. PAL PHASE (NORMAL)
1) Input a PAL SP color bar.
2) Connect the probe of an oscilloscope to TP306.
3) Set the unit in the service mode.
4)
Adjust
IPHASEPALNORI
so that the waveform of the B-Y anti-
PAL signal will be "0."
Anti-PAL signal
B-Y (01180• )
+
+
-o-
*The signal waveform differs slightly
ev~ry
hour.
Adjust it to "0."
Fig. 5-25 R-Y OUT
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