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...
I posted this set about two weeks ago for a convergence problem
question. The general consensus was that it seemed to be a pretty
routine job. Two STK392-560's, ( I got OEM Sanyo's), check bias
resistors, and all fuses, and I looked for anything else that didn't
look right.

All resistors in the parallel banks checked good. I found six 3.15A
fuses under the two heat sinks and one more 3.15A fuse located
elsewhere on the board. All seven fuses were good and nothing else
seemed to be obvious.

I powered the set up and did the "focus" procedure from the front
panel. The set goes through the procedure but will not converge. The
set was on for about 5 minutes when I touched the two heat sinks that
the 560's are mounted on. I noticed that they were cold. I couldn't
easily get to the fuses under the heat sinks but I did get a voltmeter
on the lone 3.15A fuse located elsewhere on the board. I used one of
the 560 heatsinks as ground. (I hope that was the proper ground for
the 560's supply. I assusme it was.).My meter read 1.70VDC, (Both
sides of the fuse just to be sure).

I have no schematic, so I don't know what the voltage should be off
that fuse but this seems really low. I also am not completely certain
if I used the correct ground.

Another problem I had was trying to remove the flyback HV wire from
the splitter. The focus wire came out of the focus block no problem
but I wound up cutting the HV wire 3 inches from the flyback. I'm sure
I can fix it with RTV when the time comes. but thats a minor issue. I
now have the board in the shop, if any one has any ideas.

What should have been an easy afternoon turned into a bad day. Can any
Sony guys please help me with troubleshooting this dog further? Thanks
really for ant assistance , Lenny.. . .



Do you have power to the ICs? Check the fuses in the power supply? Why are
you even bothering to look at it without a schematic?

Leonard