Question about Hitachi 46F500 46" Rear Projection HDTV-Ready Television
I replaced both stk chips and the convergence is still bowed. I have some electrical engineering experience so I am not scared to fix. I just have no idea where to begin. In convergence mode, the red will not even move. Blue will move but is way off. I have 6 convergence areas. Three on top, three in middle and three at bottom. I am in the process of going through the resistors now to make sure they are not bad. Does anyone have a schematic of the convergence board or some insight into a systematic process to figure out the problem?
First---look close at all the resistors around the chips--any that are white or discolored in the middle are suspect--MOST of the time a low value resistor (1.5, 1.8, 2.2 ohm) will be bad---check them all--there will be some 150 ohm or higher--they usually do not go--
There is a site I have found where you can download a service manual---I offer it only as information and not a solution-----http://www.nodevice.com/
If you find an open resistor or resistors they all have a location number on the top of the circuit board in case they are burnt and you cannot tell value from the color bands marked on them.
LET ME KNOW IF YOU HAVE ANY QUESTIONS OR NEED ADVICE- I am here to help people.
Regards, SD TECH
Posted on Oct 06, 2009
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Posted on Jan 02, 2017
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