Question about Hitachi Televison & Video
You didn't mention whether you replaced the convergence ICs or the digital convergence box. If the unit worked, with misconvergence, prior to doing the work you have one of three problems. 1) The part you purchased is bad (I have had two new convergence ICs turn out to be bad out of the box) or 2) you shorted some points which should not be shorted when changing the part(s) or 3) there is still a bad part in the circuit which hasn't been changed/found yet.
First look at the soldered connections of the repair with magnifier glasses and make absolutely sure that no connections are bridged. If you do not find any problems check all the resistors and diodes in the circuit to make sure that when the original part failed it did not also short a diode or resistor. This would not affect the circuit startup until the new part was put in.
In addition I have a tip at http://www.fixya.com/support/r4220499-change_projection_tv_convergence_ics which could be helpful.
Thanks for using FixYa and for the great rating.
Posted on Oct 13, 2010
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Posted on Jan 02, 2017
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