Dy Angle Adjustment - Sony VPH-G90U Service Manual

3-4-3. DY Angle Adjustment

Note: Angle adjustment should be made only with
DY for the color for which CRT was replaced.
GREEN DY Angle Adjustment
1. Set INPUT-A to the no-signal state, then select INPUT-
A.
2. Press the REGISTRATION CENT key and ADJ G key
to make the cross-hair pattern appear.
3. Press the CUT OFF key and B key to set green only on
the screen.
4. Roughly adjust GREEN DY angle so that the
horizontal cross-hair pattern can be parallel to the
horizontal line of the screen.
5. Roughly adjust the coil so that the marking section of
the GREEN MG FOCUS coil can face up.
DY terminal cover
SUB DY terminal
SUB DY band
tightening screw
NG
CRT rear
6. Adjust the GREEN CENT to the screen center using ↑,
↓, ← and → keys.
7. Roughly adjust the GREEN H.SIZE, H.LIN and
V.BOW so that the horizontal line at the center can be
straight. In H.SIZE/LIN adjustments, the screen edge or
the 30 to 50 mm marks inside the screen serve as the
reference.
In order to adjust the DY tilt easily, adjustment is made
so that the external lines of the cross-hatch come
slightly outside these marks in the H. SIZE adjustment.
8. Press REGISTRATION SKEW on the remote
commander to set to the skew adjustment model. Make
sure that the "V.SKEW" data on the screen shows
"128." Adjust to "128" if it is not so.
3-4
9. Adjust GREEN DY angle so that the cross-hair
horizontal line can be parallel to the horizontal line of
the screen, then tighten the fixing screws.
Note:
10. After fixing DY, check that the values of V.SKEW is
within the following specification.
Specification: Green: V.SKEW data = 128 ± 5
RED DY Angle Adjustment
11. Adjust RED DY tilt in the same way as the one for
GREEN DY (see Steps 1 to 10).
Marking
. Press the CUT OFF B key to set the screen to RED
and GREEN.
. Use the horizontal lines of GREEN cross-hair pattern
as reference of adjustment.
BLUE DY Angle Adjustment
12. Adjust BLUE DY tilt in the same way as the one for
OK
GREEN DY (see Steps 1 to 10).
. Press the CUT OFF R or G key.
. Use the horizontal lines of GREEN or RED cross-
hair pattern as reference of adjustment.
. . . . . Use a non-magnetized screwdriver to
tighten the screws.
. . . . . Fix the DY to the CRT funnel.
. . . . . Tighten the DY band with the following
torque.
Tightening Torque:
80 to 120 N. . . . . cm (8.16 to 12.24 kgf. . . . . cm).
VPH-G90E/G90U/G90M