Sharp VT-3428X, Руководство по обслуживанию, Страница: 12 / 136

CONVERGENCE ADJUSTMENT
Figure a.
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Figure
Figure
Wedge
Figure
magnet
magnet
CRT neck
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Adjusting Conditions
This adjustment should be performed after
the purity magnet adjustment.
Receive the crosshatch pattern signal.
Set the brightness and contrast controls to the
0 and 1 O/l 0 positions, respectively.
Adjusting Procedures
STATIC CONVERGENCE
Adjust the opening angle of the magnet
and rotate the magnet to impose the blue line
over the red one.
Adjust the opening angle of the magnet
and rotate the magnet to impose the green line
over the blue one.
DYNAMIC CONVERGENCE
T a k e t h e f o l l o w i n g s t e p s f o r d y n a m i c
convergence at the edges of the CRT screen.
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Convergence in Fig a :
Insert the wedge “a” in position, and tilt the
deflection coil upward for correct convergence.
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Convergence in Fig b :
Insert the wedges and in position, and tilt
he deflection coil downward for correct
convergence.
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Convergence in Fig c :
Insert the wedge deeper, and tilt the
deflection coil rightward for correct convergence.
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Convergence in Fig d :
insert the wedge deeper, and tilt the
deflection coil for correct convergence.
Stick the above wedges on the CRT, and apply
glass tape over them.
Apply lacquer to the deflection yoke screw, the
magnet unit (consisting of purity, and
pole magnets) magnet unit screw.
Finally receive the red-only signal to make sure
there is no mixture with any other
Do the
same with the blue-only signal.
Purity magnet
Lacquer