Martik wrote:
Samsung 750s approx 5 yrs old, text is ok but video and jpg's are too dark.
There are two adjusting 'screws' on the transformer but BOTH are for focus.
The only other adjusting screws I can find are on the neck marked Yv Yh Yhc.

Here is a pic of the 2 adjusting screws on the transformer. The one on top
cannot be turned.

http://www3.telus.net/shared/Monx.jpg

Martik

I'v never come across a LOP transformer that has TWO focus adjustments.
Maybe you have a fault rather than needing adjustment.
The bottom adjuster on the transformer is a bit like a 'threshold'
adjustment refered to as 'A1' or 'screen' or 'final anode'.
Adjust this till the screen is saturated then back off till the
'flyback lines' just dissapear.
The adjustment pot on the tube base (neck of tube) will be gain or
offset controls for the Red Green and Blue cathode drivers.
Adjusting these may help but you'll need a 'grey scale' test card to
get them right at all brightness levels.

Steve Balstone
stephen balstone