Landing Adjustment - Sony TRINITRON PVM-14N5A Service Manual

3-5. LANDING ADJUSTMENT

1. Preparations
(1) To reduce geomagnetism effects, face the CRT screen
of this to the east or west.
(2) Loosen the fixture of the deflection yoke, and push
back the deflection yoke.
(3) Turn on the power switch, and degauss with the
degausser.
(4) Adjust the tilt of the deflection yoke.
2. Adjustment
Note: The white balance, G2, and convergence need
to be roughly adjusted beforehand.
(1) Set CONTRAST to MAX.
Set BRIGHTNESS to a position which gives a clear
view.
(2) Set the video signal generator to G (green) only.
(3) Adjust the purity knob so that G (green) comes to the
center of the screen and the R and B widths become
more or less the same. (Refer to Fig. 1.)
(4) Switch the video signal generator to B (blue) only, R
(red) only, and G (green) only, check that each color is
at the center of the screen. (Refer to Fig. 3, 6, and 9)
(5) Bring the deflection yoke forward gradually and adjust
it so that the R and B at the both sides of the screen
becomes green. (Refer to Fig. 2 and Fig. 3.)
(6) Moving the deflection yoke forward too much will
result in the pattern shown in Fig. 4. In such cases,
push back the deflection yoke. (Refer to Fig. 4 and
Fig. 3.)
(7) Switch the video signal generator to B (blue) only, and
check the pattern. (Refer to Fig. 6.)
(8) Switch the video signal generator to R (red) only, and
check the pattern. (Refer to Fig. 9.)
(9) If the landing cannot be obtained in the corners, paste
the magnet and perform adjustment.
(10)Switch to the all white signal and check the
uniformity.
(11)After setting the position of the deflection yoke, secure
it with fixture.
II
S A Chassis
14-inch
TLV
YCH
Purity control
RV702
RV703
FOCUS
H.STAT
20-inch
Purity control
RV703
H.STAT
R G
A
R G B
Fig. 2 Fig. 3
G B R
Fig. 5 Fig. 6
B R G
Fig. 8 Fig. 9
Purity control
Purity
RV701
Deflection
SCREEN
yoke
Purity control
Purity
Deflection
yoke
B
A' = A
A' Fig. 1
G
G
B
Fig. 4
B R B
Fig. 7
R G R
Fig. 10
R
G
B
3-5