got a line across screen an shaded area at bottom what do i have 2 clean?
my friend bought a sagem hdt 501 50 inch tele with the bulb gone i replaced bulb and reset timer but picture has a line running through it at an angle and bottom of screen has a dark section cleaned bulb and projecter any other lenses that i should try
Remove front screen, you will need to unplug two connectors and unscrew VGA connector
Loosen plastic "table" that sits above the lens and cover whole of set bottom, many screws plus two on vertical front surface.
Remove lower mirror adjustment screws (Easy to re align later) Prise up front of "table" Remove central screw holding lower mirror. Remove mirror. Remove small plate at bottom of main mirror.
Remove table.
DLP engine now exposed.
Remove screws hoding top plate of light guide. Prise light guide top off. You will need to lever it away and up at the back as there is a small lip on upper plate.
At left you can now see the color wheel, just to the right is a tube held down by a spring plate, unscrew screws remove spring plate.
The light tube will now lift out. It contains 4 slivers of surface silvered mirrors. You will find one or more have come unstuck and no longer form a box section.
Remove mirrors clean and reglue using a high temperature glue as sold on ebay for sticking glass oven door handles on.
Check that the mirrors no longer protrude above the lip at the rhs end of the light tube.
Do not worry if some of the silvering has come off the mirrors, all this means is slightly less light.
Now re assemble, not forgetting to re align the lower mirror before fitting the bottom metal panel.
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