If the colors are not matching and shapes have a red, green or blue halos, then the problem is convergence rather than the color wheel. The problem is usually fixed replacing the two convergence ICs in the alignment circuit. The replacement involves de-soldering of two old ICs and soldering new ones in places. More components in convergence board (resistors, fuses etc.) may need to be tested and replaced. The repair ad the soldering job require training and experience and must be done by a technician.
Regards.
Ginko.
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