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Author Hitachi MICLXU
bill

2005-04-16, 3:16 pm

My brother brought me his Hitachi 27" TV to fix .... he said he was
watching it and the pictured collapsed into a single horizontal line.
I pulled the chassis (it's a MICLXU) and found the vertical output IC
had blown (literally). I replaced it with a LA7838 and nosed around
the nearby components, finding a couple of caps that tested bad with
an ESR meter. Didn't find anything else that looked bad, nothing
burnt, etc. I ESRer just about all the caps I could find, but only
two near the vertical output IC tested bad.

When I reinstalled the board into the TV and fired it up I get a nice
picture, except the pincusion is out of wack. Slightly bowed in on
both sides. I looked around on the chassis and found a single
adjustment called "pincusion", but turning it from one end to the
other made only a tiny change in the pincusion.

Is there a service menu on this chassis? I fooled around with the
front panel controls and found that if I turn on the set while holding
down the "input select" button that the screen would display a large
black box in the center of the picture, taking up almost all the
screen (the picture could be seen in the outer boarder). However, the
only thing I could do with this box was to move it to the left and the
right with the remote's left and right arrows.

Would appreciate any suggestions.

-Bill

Art

2005-04-16, 3:17 pm

Also have problems in the PCC circuit that need to be repaired. Probably
passive or active components in that circuit.
<bill> wrote in message news:srfp515pkcedq2csul5olvllcgs7u6o13g@4ax.com...
quote:

> My brother brought me his Hitachi 27" TV to fix .... he said he was
> watching it and the pictured collapsed into a single horizontal line.
> I pulled the chassis (it's a MICLXU) and found the vertical output IC
> had blown (literally). I replaced it with a LA7838 and nosed around
> the nearby components, finding a couple of caps that tested bad with
> an ESR meter. Didn't find anything else that looked bad, nothing
> burnt, etc. I ESRer just about all the caps I could find, but only
> two near the vertical output IC tested bad.
>
> When I reinstalled the board into the TV and fired it up I get a nice
> picture, except the pincusion is out of wack. Slightly bowed in on
> both sides. I looked around on the chassis and found a single
> adjustment called "pincusion", but turning it from one end to the
> other made only a tiny change in the pincusion.
>
> Is there a service menu on this chassis? I fooled around with the
> front panel controls and found that if I turn on the set while holding
> down the "input select" button that the screen would display a large
> black box in the center of the picture, taking up almost all the
> screen (the picture could be seen in the outer boarder). However, the
> only thing I could do with this box was to move it to the left and the
> right with the remote's left and right arrows.
>
> Would appreciate any suggestions.
>
> -Bill
>



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