Hi Isaac,

I had to take my THS720 apart once and it wasn't too hard. I don't
remember how accessible or repairable the LCD was, but you might explore
it a little. The LCD likely has its filters and backlight diffuser
attached with tape. Maybe you could use the filter from a portable DVD
player.

At the time I fixed mine (it had a dirty connector inside that just
needed cleaning), I asked Tektronix about parts. I seem to recall they
had a flat rate, over a thousand dollars.

Best regards,

Bob



On Sun, Oct 21, 2012, at 07:15 AM, Isaac Marino Bavaresco wrote:
> Dear All,
>=20
>=20
> My Tektronix THS730A's LCD screen got damaged. It has an irregularly
> shaped region near the center of the screen that is faint.
> If I adjust the contrast then I can see the image in that region, but
> then the undamaged area gets too dark to be seen.
> It is clearly something related to the polarizing filters because I can
> see the stain even with the scope turned off. Besides, the stain contour
> does not follow the pixel's borders (it is continuous, not serrated).
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> Would it be possible to replace just the polarizing filters? If not,
> where can I find a replacement LCD panel?
> This model is long out of production, I think Tektronix doesn't stock
> its parts anymore. Here in Brazil there is no more official Tektronix
> representatives anyway, and the guys that have the part in stock charge
> almost US$1,000.00.
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> I tried to buy a THS720A in e-Bay to use just the LCD panel but was
> outbid.
> I appreciate any suggestions.

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