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PT-302
11) Adjust
R745
to get staright horizontal
lines from top
4) Readjust the deflection
yoke if any of the horizontal
to bottom as shown in Fig. 25.
lines ate tilted.
5) Receive
an
RGB
signal and turn
on the TEST
SW.
(S8001).
=>
6) Cover the Blue lens with the lens cover.
7) Adjust the convergence as follows.
8) The following controls are located on the convergence
control board.
Fig. 25.
9) Adjust
each
of
the
red
convergence
adjustment
controls in the order of the instructions @) to
@)
in
9.
CONVERGENCE
ADJUSTMENT
the figure so that the red pattern
matches the green
1) Demagetize the chassis and CRTs using a degaussing
pattern.
coil.
10)
Remove
the lens cover from the Blue lens and cover
the Red lens.
=
2) Adjust
all three
deflection
yokes
to
converge
all
horizontal lines at the centre of the screen. Deflection
11) Adjust
each
of the
blue
convergence
adjustment
yokes be inserted all the way towards the front side
controls in the order of the instructions
@6) to
mM
of the CRT
the figure so that the blue pattern matches the green
pattern.
3) Adjust each
centring
magnet to set the pattern centre
;
12) Return the red CRT to operation.
Function of Adjustment VR'S
to at the geometric centre of the screen.
Order of Adjustment VR'S
CONVERGENCE
LIMITS :
(in mm from centre of
raster centre)
—17—
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