CurtPalme.com Home Theater Forum

[gjaky]

I started the setup of my 9PG xtra from scratch, because the last setup was crap. I haven't used this machine at least for 4 months, so I can't remember how it behaved exactly in this sense. However I have an other 6PG xtra, but the lack of space I can't do side by side comparision (they are far away)
I'm still at the "lenses are off" step of the setup and noticed some strange issue with horizontal shifting.
Every menu item is set to midpoint.
1.)Changing resolutions from the low end to the high end I noticed that some resolutions (eg 720P@60) are much more shifted in one direction (almost the half of the picture is out of raster) than the other resolutions which are quite normal. Is this normal? -again: all electric adjustments in mid position with every res.
2.)Here comes the shift problem: to homogenize the image centers of the different resolutions I tried to use H shift, the first couple clicks moves the picture as they should then the shifting stops (or slowing down horribly) and this goes for the next 30-50 values, then the picture jumps to the opposite side of the raster. Setting to other direction is the same.
So there are 100 values of the menu but only 10-20 of this are legal values.
Sometimes I could set it to the center and stored the data, but if I changed resolution or source and then back to 720P the picture is off center albeit the menu value remained the stored value.
With different resolutions the jumping in the shifting also occurs.
Is this a timing problem or an electronic?

Geometry: using video input with every electronic value at midpoint. Both vertical and horizontal borders are almost parallel. Using RGB input ti needs about constant 20% Phase Tilt correction in every resolutions to get parallel borders.
Also: Is this normal?

[Curt Palme]

Different shifts at different resolutions is pretty normal. Not having the 'shift' or 'move' button do anything for most of the range, then it jumping across left to right isn't correct though. I'm guessing bad capacitors, something that's now very common in the NECs. I just sold a 6PG+ and changed about 30 of them.

Having to change certain parameters like tilt etc at different resolutions is pretty normal, so everything sounds OK with the exception of the 'shift' issue.

[Curt Palme]

Different shifts at different resolutions is pretty normal. Not having the 'shift' or 'move' button do anything for most of the range, then it jumping across left to right isn't correct though. I'm guessing bad capacitors, something that's now very common in the NECs. I just sold a 6PG+ and changed about 30 of them.

Having to change certain parameters like tilt etc at different resolutions is pretty normal, so everything sounds OK with the exception of the 'shift' issue.

[gjaky]

Thanks!
I'll look around!
I even changed ~10 caps on def board, although the capacitance of them was exactly their value, but I don't have ESR meter so I changed them though a new one.