Sony PVM-20M2U Service Manual page 34

10-5. NT 358 CHROMA (ACC OFF)
Note: 10-5. is not applicable to the group of models 3.
1) Conduct ACC OFF via MENU.
2) Adjust
ICHROMANTSC3SSACCOFPI
in the same way as 10-4.
shown above. (Fig.5-18)
IC404®PIN
--------------- ---- _____________ + __ _
10mVmax.
Make adjustment so that the 1st and 4th
peaks are at the same level.
Fig. 5-18
10-6. NTSC 358 R-Y LEVEL
Note : Be sure to set ACC in the ON position before this adjust-
ment.
1) Input an NTSC 358 color bar.
2) Connect the probe of an oscilloscope to IC 404 @PIN orTP401.
3) Set the unit in the service mode.
4) Adjust
IR·YLBVBLNTSC 3SSI
so that the peaks of waveforms will
be flush with each other as shown in Fig.5-19.
IC 404@PIN
60mVmax.
+
B
0
20mVmax.
Make adjustment so that B=D as shown above.(20mV max.)
Check that the difference between B and C is less than 60mV.
Fig. 5·19
10-7. NTSC 443 PHASE (NORMAL)
Note : 1 0-7-3). is not applicalbe to the group of models 3.
1) Input an NTSC 433 color bar.
2) Connect the probe of an oscilloscope to TP306.
3) Set the unit in the HIV DELAY mode.
4) Set the unit in the service mode.
5) Adjust
IPHASB NTSC 443 NOR. I
so that the burst section of the out-
put waveform will be straight. (Fig.5-20)
Make it flat
Fig.5-20
10-8. NTSC 443 PHASE (ACC OFF)
Note : 10-8. is not applicable to group of models 3.
1) Conduct ACC OFF via MENU.
2) Adjust
IPHASBNTSC443ACCOFPI
in the same way as 10-7-5).
(Fig.5-21)
Make it flat
Fig. 5-21
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