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PVM-20M7MDE
4-3. Landing Adjustment
I. Direct
the set
toward either east or west.
Set the CONlRASTto MAX.
Set the BRIGHTNESS for good viewing.
Receive the PAL green signal.
2. MovebacktheDY.
Note: If the AC power is 50Hi, remove the input signal to
makethcsetfree-runninganddegausstheset.
3. Degaussthesetusinganextemaldegausser.
4. Adjust
the
purity magnet until the green raster comes to the
centerofscreen.
(Fig. I)
'
'"''"'°"'"',"''"
.
deflection yoke
~
ASA
~F/g.1
S. Move the DY forward until the entire screen become green
onlyscreen.(Fig.3)
6. Check then-the-Band R signal. If a signal color cannot
be
obtained, return
to
step
5.
(Fig. 6, Fig. 9)
[fil-8-[fE]
7. AdjusttiltoftheDY.
8. Tighten the DY stop bracket gently.
9. Return the CONTRAST and BRIGHTNESS to standard
condition.
10.
Receive the
PAL
green signal.
Set the CONTRAST
to
MAX.
IL Degauss the entire set using the hand degausser, and again
degauss the CRT surface
finally.
Then degauss the
entire
screen of CRT using manual degauss.
12.
Adjust the
DY
position, purity,
DY tilt,
centering and landing
at four comers.
Tighten
the
DY
stop bracket temporarily.
13.
Regarding the
neck
up and down adjustments, and the
neck
right and left adjustments
of
DY,
perform these neck
adjustments
until
the trapezoidal waveform is symmetrical in
vertical and horizontal directions. Then insert the wedges so
thattheDYisfastened.
14.
Check landing at four corners.
If
landing error
is
found, attach
the
disk-magnets
to
correct the landing error.
The magnets must
be
attached in
the
diagonal lines
in
the range
of80to
100mm
from the
DY.
If magnets are used, degauss the set and confinn it.
Number of magnet must be 4 or less. Use one magnet at
maximum for one comer.
-26-
Fig.2
Flg.8
Fig.4
Flg.5
Fig.6
Flg.7
Fig.8
Flg.9
Fig. 10
15. Check the color purity of R, G and B using the single color
~spectively.
16. Check that
the
DY is
not tilted, and tighten the DY stop bracket
andfixitusingwhitepaint.
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