[pjfool]

I sent my plv60 to Sanyo because of a convergence problem. Pink outlines on noses alerted me to this and after observing a white cross-hatch pattern on a black background it was obvious - a few rows of green pixels on the left and a few rows of pink on the right for every white vertical line in the picture. Now that I got the pj back this is what I see on the cross hatch pattern. A couple of rows of green pixels on the left and a couple of rows of pink on the right in the far left of the picture, and exactly the OPPOSITE at the far right of the picture, and perfect lines in the center. I am pretty sure Sanyo's adjustment has corrected the pink outlines on noses near the center of the picture but the far left and right are still gonna give me problems. What I would like to know is if this is as good as I should expect from this pj or should I send it back again?


Another interesting note, I had to adjust my DAC settings 68 and 69 to get rid of a vertical green strip that suddendly appeared on the right edge. When I got the pj back, the DAC settings were back to factory specs but no green vertical strip anymore.


All the package slip said was: Adusted IIC data.

 

[MadMyers]

So no other service menu changes? Contract, Brightness, Subcontract, etc?


Interesting...


Clearly there are more adjustments than accessible to a mortal...


...MadMyers

 

[Darrel Johansen]

A single pixel mis-alignment across the screen as within spec, I believe, and you should not notice it from normal viewing distances. However, what you are describing sounds like a severe mechanical alignment problem of the LCD. I'd say, send it back.

 

[DanHouck]

PJ, I have copy of the PLV60 service manual. Email me at [email protected] and I'll send it to you. I think you'll find the convergence section interesting reading and will help you to describe in detail to Sanyo what is off and what needs to be done.


Dan

 

[Jim Scarbrough]

Some of the color misalignment aberrations on LCD projectors are attributable to the prism that converges the three images into one. Most of the Sanyos seem to use an X-cube prism, which provides many advantages, but usually cannot perfectly align the 3 images, regardless of settings.


Other prism technologies can more accurately (more easily?) align the images, but may have issues with color shifts, brightness uniformity, etc.


Still most people on the forums here who have reported this type of issue have been able to tweak it to the point where it is not obvious to the naked eye.

 

[Darrel Johansen]

Quote:

Still most people on the forums here who have reported this type of issue have been able to tweak it to the point where it is not obvious to the naked eye.

Jim, have you actually messed with the mechanical alignment? I can see mine being off by one pixel when I'm 2' from the screen, but at normal viewing distance I cannot see it. I was a little hesitant to open it up and try a mechanical adjustment. Seems like it would be really easy to screw up...

 

[pjfool]

I have an update to my convergence problem. I couldn't resist the 1K htpc special being offered here (which I will be posting a review of shortly in the htpc area) and discovered that the problem is MUCH less noticable from this source through VGA compared to the rp56 through component. In fact, convergence patterns from Avia and TXH setup guides show my alignment is off exactly 1 pixel at the extreme right and left edges. Not bad. I already have the paper work from Sanyo to send it back but have no inclination to go through with it now. Both the VGA and component cables are fifty feet long. The VGA is from bettercables and the component is from comprehensive.


So does anyone have any ideas why the rp56 source produces this problem? Is it the rp56 or cables or is component inherently more fulnerable to electrical interference? Or is it simply the fact that htpc kicks ass that much more than the rp56 ever could?

 

[Jim Scarbrough]

He** no. I'll leave panel alignment to qualified techs. Even if I knew how, I'd probably drop a screwdriver in there and FUBAR the whole thing.


Just guessing here, PJ, but since VGA carries the 3 color signals separately, plus separate sync signals for H & V, it's able to be a bit more accurate. Plus the signal is starting and staying progressive-scan with the HTPC. Most DVD players make an interlaced signal, then deinterlace it.