[TechAssist] Re: Sony KV35S40 CRT [more info]
- From: Gary McCartney <number63@xxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Sun, 10 Feb 2002 13:38:45 -0500
Sorry, I forgot to add in the original post that sometimes trying to add
magnets proves to be worthless. It all depends on how bad the tube has
been knocked. Sometimes it is a fairly simple matter (like the one I did
last week) or it won't work at all and you have to give up on it.
Gary
Yes, that is what has happened. The trinitron tubes are the worst for
this happening. I just did one the same a week ago. I used magnets on
the rear of the picture tube to correct the purity. It did pull the pin
cushion out of square in the corners but to the average home user, it
won't be all that bad. (better than throwing the set out). If you apply
magnets, turn the set off afterwards, let it cool down, rotate the set
90 degrees, then turn it on again. Check that the purity still looks ok
as to how you adjusted it with the magnets. Sometimes when the set faces
another direction, the earths magnetic influence with the magnets
changes the purity again on you and you have re- adjust. I usually try
to find out from the customer which direction they have their set
facing, and apply the magnets while the set faces that direction. Good
luck.
Gary McCartney
McCartney Electronics
7134 Fife Rd, RR 7
Guelph Ontario Canada N1H 6J4
Fax: (519)821-1530
email: number63@xxxxxxxxxxxxx
sandman wrote:
>
> A question about CRT's
> A customer brought in a 35" Sony that he had dropped twice. Once straight
> down to the floor and then it fell off his stand onto it's back. I found the
> CRT board cracked, I repaired it and the set fired right up. On the left side
> of the picture there is no red. When I put in a full red raster the left 8"
> is green!
> Here's the question...Can dropping a set cause the shadow mask in the CRT to
> move or otherwise knock the guns out of alignment? Has anyone heard of this
> before?
>
> Jim
> Maxfield Electronics
> Northfield, NH 03276
> USA
> sandman@xxxxxxxxxxxxx
>
>
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