Sony BVM-1911 Operation And Maintenance Manual page 138

29. DA BOARD LINEARITY ADJUSTMENT
• Linearity adjustment of 4:3 aspect picture.
ASPECT button······· ............ ···· ...... ······· 4: 3 (HY board)
Tektronix 1410/1411
Generator
Cross-hatch
TOP AND BOTTOM PIN ADJUSTMENT
I.
2.
3.
4
5.
6.
7.
8.
Receive cross-hatch signal and with H-LINE only.
Adjust T&B pin distortion H PHASE by turning DA board RY27
(TRAPEZOID) as shown in Fig. 29-1.
Adjust T&B pin distortion gain by turning DA board RY!3 as shown
in Fig. 29-1.
Adjust T&B pin distortion vertical balance by turning DA board
RV!O as shown in Fig 29-1.
Adjust PARALLELOGRAM distortion by turning DA board RY28
(PARALLEL) as shown in Fig. 29-1.
Mark tracking by repeating 2 through 5.
UNDER SCAN switch (front panel) ................... UNDER ( .=.)
Adjust T&B distortion gain by turning DA board RVJ4.
Counter-
clockwise
1
cJ
1
¢
D
¢
rD
1
~~;PEZ0/0)
1::::::1¢§¢18
IRVIJ
(T&B PIN)
4:3
16:9
lr-1
~~~
~
~~~
~~~~
~~~
RV13 RV14
NOR UNDER
T/B PIN
0
DA board
DA board
~
~
~
RV28
~
PARALLEL
~
0
RV27
TRAPEZOID
~ ~
RV10
T/B
BALANCE
[SJ~§
9
Q ___,,.
RVTO
~ l010j
--- (T&B BALANCE)
Fig. 22-t
AUTO
SET UP
PROBE
0
DEGAUSS
FRONT PANEL
SCAN MODE SCREEN
~
r-r-1
~~~~ g~~~ ~~~
PHASE CHROMA BRIGHTNESS CONTRAST OVER INPUT
~~~~~6g[gJg]
~ 0 0 0 0
L~AD
[g] [Q]
~ ~
ij ij ij
O
gg
0
0
-W.NUAL3 •
UNDER SCAN
1-
SW
'------'-==--'
4-79
POWER
0
oo
0
0
0
0
0
0
V. LINEARITY ADJUSTMENT
I. Receive cross-hatch signal and with H-LINE only.
2. Adjust Y. CENTER by turning DA board RY21.
3. Adjust V. LIN BALANCE by turning DA board RV20 as shown in
Fig. 29-2.
4. Adjust V. LIN GAIN by turning DA board RV22 as shown in Fig.
29-3.
5.
6.
7.
8.
Adjust V. HEIGHT by turning DA board RV23.
UNDER SCAN switch (Front panel) ..... UNDE (-=. )
Adjust V. HEIGHT by turning DA board RV24.
Mark tracking by repeating steps 2. through 5.
R V20 . .... V UN BALANCE
Counter-clockwise Clockwise
Fig. 29-2
RV22 .. ... V LIN GAIN
Counter-clockwise
Clockwise
Fig. 29-3
SIDE PIN ADJUSTMENT
I.
2.
Receive cross-hatch signal and with V. LINE only.
Adjust SIDE
PIN
by turning DA board RY!5 as shown in Fig.
29-4.
3. Adjust SIDE PIN TILT by turning DA board RV 19 as shown in Fig.
29-5.
4. Adjust H. CENTER LINE by turning DA board RY25 as shown in
Fig. 29-6.
RV15
(SIDE PIN)
Fig. 29-4
RV/9 (SIDE PIN TILT)
Fig. 29-5
4-80
RV25 (H. CENTER LINE)
Fig. 29-6
5. UNDER SCAN switch (Front panel (L)) .... UNDER(.=.)
6. Adjust SIDE PIN by turning DA board RV16.
H. LINEARITY ADJUSTMENT
I. Receive cross-hatch signal and with V-LINE only.
2.
Adjust H. LINEARITY by turning DA board RV6 (H LIN GAIN) as
shown in Fig. 29- 7.
Fig. 29-7