Sony PVM-20M2U Service Manual page 30

7. Horizontal deflection adjustment (UNDER SCAN ad-
justment)
1. Input a 525 monoscope signal.
2. CONT ... 80%
BRT .... 50%
3. Set the unit in the U/S mode.
4. Set the unit in the service mode.
5. Adjust IU/SVSIZB<60>1 so that UNDER V.SIZE will
be
within
the standard.
6. Adjust ' " ' l u=IS=a=siZB=I so that UNDER H.SIZE will be within the
standard.
7. Adjust r. I U. . , / S : - ; P : ; ; ; I N, . - AMP. , . . . . . i < l l and lUIS PIN-PHASE
I.
(Adjust tracking accord-
ing to 5., 6., and 7.)
8. After adjustment, the white frame of the monoscope shall not be
out of the effective screen.
9. Set the unit in the 16:9 mode.
10. Make the same adjustment with 5. and 7. by means of
116:9 U/S V SIZE <60>1, 116:9 U/S PIN-AMP! and 116:9 U/S PIN-PHASE!.
Table 5-5
Standerd values for groups of models 1, 2, and 3 {14")
525 625
U/S H-SIZE
252mm
V-SIZE
188mm
-
16:9
142mm
-
UIS V-SIZE
Table 5-6
Standerd values for groups of models 4 and 5 {20")
525 625
U/S H-SIZE
364mm
272mm
-
V-SIZE
16:9
205mm
-
U/SV-SIZE
11. Set the unit in the 16:9 mode.
12. Input a monoscope signal.
13. Make the same adjustment with 5. by means ofiU/SV SIZB<SO>I.
14. Set the unit in the 16:9 mode.
15. Make the same adjustment with 5. by means of
116:9 U/S VSIZB<SO>i.
Note : If there
is not time enough for adjustment (5. Vertical
deflection adjustment and 6. and 7. Horizontal deflection
adjustment), confirm that the respective sections will
operate normally and that adjustment is possible, and then
input standard adjustment values.
8. H/V-DELAY adjustment
Note : This item applies only to groups of models 1, 2, 4, and 5.
8-1. H-DELAY adjustment
1) Input a 525 monoscope signal.
2) CONT ... 80%
BRT .... 50%
3) Set the unit in the H/V DELAY mode.
4) Set the unit in the service mode.
5) Connect the probe of an oscilloscope to IC503 (f) PIN. Adjust
IH DBLAYI so that the output waveform will be
as
shown in Fig.5-
6.
I
I
I
I I
I I
:
. .
. .
:
I I
I I
41±0.5,uS
Fig.5-6
8-2. V-DELAY adjustment
1) Input a 525 monoscope signal.
2) CONT ... 80%
BRT .... 50%
3) Set the unit in the H/V DELAY mode.
4) Set the unit in the service mode.
5) Connect the probe of an oscilloscope
to
IC502 (f) PIN. Adjust
lv DBLAYI so that the output waveform
will be as
shown in Fig.S-
7.
I I
I I
! ....
41------i ..
~!
8.0±0.2mS
Fig.S-7
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