Raster Position; Vertical Size; Horizontal Size - Hitachi 51SWX20B Service Manual

2.6 Raster position adjustment
Adjustment preparation
(1) The set can face east or west.
(2) Input the single cross test signal.
(3) Set video conditions to factory preset.
(4) The static focus should have been coarse
adjusted.
(5) The digital convergence RAM should be cleared
(uncorrected state). With the TV set off, press
and hold the service switch located on the
DEF./CONV. PWB and then press the power
button.
(6) Start adjustment 20 minutes or more after TV is
turned on.
Adjustment procedure
(1) Turn the centering magnets for red, green, and
blue to satisfy the condition below. The red and
blue horizontal lines should match with green.
51"
57"
65"
Tolerance: ± 2mm
Units = millimeters
25.4mm = 1in.
R
1 2
(2) Upon completion of adjustment, fix centering
magnets with white paint.
NOTES: (1) If internal cross-hatch does not appear
after clearing RAM data, press service
switch again.
(2) To restore old RAM data, turn TV off and
on.
2.7 Vertical size adjustment
Adjustment preparation
(1) The set can face east or west.
(2) Set video conditions to factory preset.
(3) Convergence should not be corrected.
(4) Start adjustment 20 minutes or more after TV is
turned on.
Adjustment procedure
(1) Receive any NTSC signal.
(2) Press the SERVICE ONLY SW on DEF./CONV.
PWB and POWER to display DCU uncorrected
convergence data.
(3) Locate the vertical size VR (R607) on
DEFLECTION PWB.
according to the following table.
BACK TO ADJUSTMENTS
(RED) (BLUE)
1
2
20 35
20 35
20 35
B
Geometric
center of the
screen
Adjust the vertical size
= NORMAL
MODE
51"
57"
65"
Tolerance: ± 5mm
Between the
horizontal lines
at the top and
bottom
Notes:(1) If internal cross-hatch does not
appear after clearing RAM data,
press service switch again (on
DEF./CONV. PWB).
(2) To restore old RAM data, turn TV
off and on.
(3) V-Size is only done in NORMAL
mode (NTSC).
2.8 Horizontal size adjustment
Adjustment preparation
(1) The set can face east or west.
(2) Set video conditions to factory preset.
(3) The Static Focus adjustment should have been
coarse adjusted.
(4) Convergence should not be corrected.
(5) Start adjustment 20 minutes or more after TV is
turned on.
Adjustment procedure
(1) Receive any NTSC signal.
(2) Press the SERVICE ONLY SW on DEF./CONV.
PWB and POWER to display DCU uncorrected
converge data.
(3) Locate the horizontal size VR (R711 on
POWER/DEF PWB). Adjust horizontal size to
the table below.
NORMAL
=
MODE
51"
57"
65"
Tolerance: ± 5mm
Notes: (1) Once Normal mode Horizontal size adj. is
done. To restore old RAM data, turn TV off
and on.
(2) After adjustment, press SERVICE ONLY
switch to exit DCU crosshatch.
(3) H. SIZE adjustment is only done in
NORMAL MODE (NTSC).
38
DP27/27D
560
Units = millimeters
25.4mm = 1in.
625
The 5th line
710
from center
1020
Units = millimeters
1140
25.4mm = 1in.
1300
The 6th line
from center
Between the
vertical lines
at the left and
right end.