CurtPalme.com Home Theater Forum

jbmeyer13 · Joined: 03 Dec 2010 Posts: 1135

I swapped out my HD10L's last night in favor of HD10F's off a G90. My screen is 80" wide and with the 10L's I couldn't get perfect focus near the L/R edges. A few interesting observations upon installation:

1) I immediately noticed bow at the top center of the image. With my 10L's everything was dead on (I spent hours getting the geometry right when doing set ups with the 10L's..)

2) Also noticed that the vertical grid lines on the right side of the screen (1/4 of the way from the right screen border) were crooked. This means I'll have to tweak geometry again...argh!!!!

3) I did the scheim-f*ck adjustment again and was able to get better focus at the right and left edges. I used the resolution test pattern from the DVE disc with the tiny alphabet and symbols. Interestingly enough I noticed that the focus at the left screen border was just a hair better than on the right (and I spent 5 hours screwing around trying to make it 100%perfect). This leads me to believe that there might be slight differences between the individual lens.

Thus far it looks like a lens swap is not entirely plug and play. It would appear that to really optimize everything I'll have to do a full mechanical set up again on the R/B guns . It looks like I shouldn't have to do too much to the green geometry, hopefully just touch ups on right and left sides where the aforementioned issues exist.

Perhaps this is because of significant difference between the curvature of the lens. The 10L's have more curve than do the 10F's.

Has anyone else experienced something similar? Am I doing something wrong?

digitalayon · Joined: 02 Mar 2009 Posts: 921

Curt told me the other day that the 10L is only good for 70 diag on a 4:3 image. Which is probably why you could not focus your edges. I have seen this issue on a 1208 with HD-145's adapted. Took a complete static setup.

jbmeyer13 · Joined: 03 Dec 2010 Posts: 1135

**Curt Palme** · Posted: Thu Mar 15, 2012 4:34 pm Post subject:

BTW, what happens to the 'hook' at the top if you shrink the V height? Does it go away? Can you see the bend on the tube face while looking through the lenses?

jbmeyer13 · Joined: 03 Dec 2010 Posts: 1135

dvh99 · Joined: 25 Dec 2009 Posts: 2158 Location: nederland

DELTA HD-10L (standard on Marquee 9000 model number 38-P13092-94)

This lens has been designed to give optimum performance with smaller screen sizes. It provides the best performance between the three lenses on screen sizes from 5’ (1524mm) to 9’ (2743mm) measured diagonally (4:3 aspect ratio).

jbmeyer13 · Joined: 03 Dec 2010 Posts: 1135

**Curt Palme** · Posted: Thu Mar 15, 2012 5:56 pm Post subject:

dvh, those stats are definitely wrong, the max is 72" diagonal for the 10Ls.

dvh99 · Joined: 25 Dec 2009 Posts: 2158 Location: nederland

CIR Engineering · Posted: Thu Mar 15, 2012 8:37 pm Post subject:

It is normal to have to do a lot of geometry and focus when you swap lenses. Nothing wrong or out of the ordinary with that.

I don't think you will need to do any magnetic focus (though you might), but the geometry work you describe is typical. And absolutely you will have to do lens flapping all over as you know now.

craigr

jbmeyer13 · Joined: 03 Dec 2010 Posts: 1135

CIR Engineering · Posted: Thu Mar 15, 2012 9:26 pm Post subject: Re: HD10F lens swap on 9500LC

jbmeyer13 · Joined: 03 Dec 2010 Posts: 1135

Update: I adjusted the scheimf*ck for all 3 tubes (G yesterday and R/B tonight) and then went into to adjust the geometry on the green. All of the sudden these black dots appear on the screen in random locations. I cycled through the red and blue and there is no sign of this problem; only on green. I took off the PJ cover and tugged on the wires going to the VNB to see if maybe some type of noise but it had no effect.

Thoughts/Suggestions?

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

Check the Black Wires on the VNB that go over the RGM amp Chip. there are two wires. Pull them up off the RGB amp and see how it looks. Those are the heater filament wires and can carry some noise that can jump to the Cl 449 RGB amp .

Drags does a mod where they are moved under the PCB and he adds a ferrite choke on the wires.

Athanasios

jbmeyer13 · Joined: 03 Dec 2010 Posts: 1135

I saw the post about that after doing a search- I tried and it made no difference. I pulled the lens and looked at the LC chamber, it's definitely some type of artifact as the phosphor shows no sign of degradation.

dvh99 · Joined: 25 Dec 2009 Posts: 2158 Location: nederland

try to move the cables from the hdm and see what happens.
and try to keep the video cables away from the g2 cables that run along the 3 tubes.

jbmeyer13 · Joined: 03 Dec 2010 Posts: 1135

Hey Dennis,

Moving the HDM cables was the very first thing I tried as well as making sure both the focus board and HDM were seated properly. Also checked connections on vertical/conv/astig boards on heatsink and couldn't detect any issues there either.
Evil or Very Mad

Fcuk.....

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

Ok Swap mini RCA on Vim from green to blue, blue to green, check if Green still shows dots or if they move to blue. if they are still there .If they are still there then go back to stock and swap the VNB from green to blue, see if it follows.

Report back

Nashou

jbmeyer13 · Joined: 03 Dec 2010 Posts: 1135

Tried all of that and it made no difference; still dots..

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

How About the lens itself? swap the lens.

Athanasios