Sony BVM-1916 Operation And Maintenance Manual page 122

29. DA, DB Board LINEARITY ADJUSTMENT
Tektronix 1410 (NTSC)/1411 (PAL)
Generator
H. OSC Free- run Adjustment
1. Set the SYNC button to EXT.
Cross-hatch
0
2. Adjust H.FREQ. (RV202) on the DB board until the picture
movement is still or slow.
Fig. 29-1
Horizontal Phase and Horizontal Blanking
Adjustments
Set the SCAN seiector to UNDER position
Turn the horizontal hlanking controls H.BLKR ful!y
clockwise and H.BLKL fullv counterclockwise. (When the
raster at both sides of scre~n are not appenr completely.
turn H.W.U (RY2) until obtaining the raster.)
C
Fig. 29-2
VIDEO A
terminal
75n terminator
3.
Adjust H.PHASE (RV20t) on the DB board for both sides of raster
width without signal component coincidence.
4.
,.;
8
A=B
monoscope pattern
Fig. 29-3
Adjust H.BLK.R/H".BLK.L (RY24 and RY23) on the DA board so
that the raster width without signal component become half.
A
8
--11- --11-
'
-j
...
r~
A=B
monoscope pattern
Fig. 29-4
4-79
DB board
AUTO
SET UP
PROO(
0
DEGAUSS
UNDER SCAN
SW
V.DELAY
SW
S201
=
=
RV201 RV202
H.PHASE H.FREQ
FRONT PANEL
SCAN MODE SCREEN APER· BLUE M:INO
r-r, r--r---1 TURE ONl) MOD£
[gJ [I]
13
R
[g][g][g][g][g)[g][g][g][g]
DA board
~~RV2~
(H.W.U)
~ ~
~
~~
~~
~~
~~
~~
~~
~~
~~
4-80
CONTRAST
MANUAL SW
=
BRIGHTNESS
MANUAL SW
RV23
(H.BLK.L)
~~
RV24
(H.BLK.R)
=