Left And Right Pin-Cushion Distortion Adjustment - Sony Multiscan GDM-2036S Service Manual

GDM-2036S
4) Adjust the horizontal size to the prescribed size with H.
SIZE data.
S) Adjust H. PHASE data so that the image is at the center
of the rasters.
ODD
Raster is stationary
Fig.6-3-13 H. PHASE movement
6) In case if the H linearity is asymmetrical, change the H.
CENT and H. PHASE data together so as to retain the
picture center position and choose the best point.
Note: The adjustments in the section 6-3-6 have. to be
performed again after the adjustments in the
section 6-3-7 and 6-3-8 are completed. The raster
is set as shown in the Fig. 6-3-14 and 6-3-15 after
the horizontal and vertical position and size ad-
justments are completed.
bezel edge
raster
picture
.111
=
.112
.113
=
.114
0
.115
=
.116 (mode9)
.117,
.118
~
3mm
.112
.115 and .116 must be equal only on mode 9.
Fig.6-3-14 Centering Standard
a <2.7mm
b < 2.7mm
mode
1,2,3,4,
5,6,7,9
8, 10
A
270
274
B
360
343
Fig.6-3-15 Image Size and Distortion Standards
6-3-7. Left and right pin-cushion distortion adJust-
ment
1) Change the PIN data to adjust the right and left sides lines
of the image become linear.
" , ,
.
,
, ,
---+
+t-
o ,
, ,
, ,
,
.
"
"
,
,
, ,
.
,
,
,
~ ~
o ,
, ,
,
,
, ,
"
Rg.6-3-16 PIN Movement
2) Adjust the KEY and KEY BAL data so that the width at
the top and bottom sections of the image becomes equal.
!KEYBAL
I
Fig.6-3-17 Movement of KEY and KEY BAL
3) Check if the pin-cushion distortion balance is even on the
right and left sides (i.e., when one side is adjusted to
straight line, the correction for the other side is not over
or under). If the balance differs, change the PIN BAL
data to adjust pin-cushion distortion on both right and left
sides equally. Then, adjust both sides to become straight
lines using the PIN data again.
Fig. 6-3-18 Movement of SIDE PIN BAL
-94-