Sony PVM-20M2U Service Manual page 32

2. SUB PHASE adjustment
Note : Not applicable to the group of models 3.
l. Input a component color bar (R-Y) and EXT SYNC.
(BETA 0 level signal)
2. Set the unit in the EXT SYNC mode for component input.
3. Connect the probe of an oscilloscope to IC404
~PIN
or TP402.
4. Set the unit in the service mode.
5. Adjust
!SUB PHASE!
so that the output waveform will be mini-
mum (15 mVp-p or less). (Fig.5-11)
15mVp-p max.
Fig. 5-11
3. SUB PHASE adjustment
Note : Not applicable to groups of models 1, 2, 4, and 5.
l. Input an NTSC color bar.
2. Connect L309 to GND and TP307 to 5V line (L320 line), re-
spectively.
3. Set the unit in the service mode.
4. Adjust
!SUB PHASE
I
so that the output waveform will be mini-
mum (15 mVp-p or less). (Fig.S-11)
4. SUB CHROMA adjustment
Note : Not applicable to the group of models 3.
l. Input component color bars (R-Y, Y, and B-Y). (BETA 0 level
signal)
2. Set COMPONENT LEVEL to BETA 0 via MENU.
3. Connect the probe of an oscilloscope to IC404
~PIN
orTP402.
4. Set the unit in the service mode.
5. Adjust
I
SUB CHROMA NORMAL!
so that the peaks of waveforms
will be flush with each other as shown in Fig.5-12.
A
c ___________
J__
20mVmax.
Make 8 flush with D
Fig. 5-12
5. SUB COL adjustment
Note : Not applicable to groups of models 1, 2, 4, and 5.
1. Set the unit in the service mode.
2. Input adjustment value 98 to
lr-..sUB~CHR""""'o:a.MA...-.N"'O'"RMAL...,...,I.
(Fig.S-12)
6. R-Y LEVEL adjustment
Note : Not applicable to the group of models 3.
l. Input component color bars (R-Y, Y, and B-Y). (BETA 0 level
signal)
2. Set COMPONENT LEVEL to BETA 0 via MENU.
3. Connect the probe of an oscilloscope to IC404 @>PIN or TP40 l.
4. Set the unit in the service mode.
5. Adjust
IR-YLI!VBLCOMPONBNTI
so that the peaks of waveforms
will be flush with each other as shown in Fig.5-13.
Make adjustment so that B
=
D as shown above. (20 mV max.)
Check that the difference between B and C is 30 m V or less.
30mVmax.
t
B
D
20mVmax.
Fig. 5-13
7. SUB CHROMA N10/SMPTE
Note : Not applicable to the group of models 3.
l. Input component color bars (R-Y, Y, and B-Y). (SMPTE Jerel
signal)
2. Set COMPONENT LEVEL to NlO/SMPTE via MENU.
3. Connect the probe of an oscilloscope to IC404 <ij) PIN or TP-40:2.
4. Set the unit in the service mode.
5. Adjust
I sUB CHROMA SMPTEI
so that the levels of B and D will be
the same. (Fig.5-14)
A
c ___________
J__
20mVma)C:.
Make 8 flush with D
Fig. 5-14
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