CurtPalme.com Home Theater Forum

[mrfixit]

No joy...
Had enough energy to get the CLB put in, it does show v5.5 for DPB U7 (and 4.2c ROM), but no difference as far as controlling those specific geometry functions.
Tomorrow I'll try a swap of the focus module after giving the PJ I picked up today a good going over (it's still in the car).
I also pulled the rear heatsink to change out the anamorphic mod resistors in the morning; as suspected they are 30k's.

Anything else I should look for while I'm at it?

Thanks all - Lewis

[Nashou66]

on an ultra DPB there are more than one Fly Wire near the Connectors. a short one and then a longer one, maybe 2 -3 inches.
if its not there then I think you can add it to make it an ultra DPB unless some other chips have different software as well . I am not sure about that MP or TSE would know more, or Tim.

also if the rear heat sink boards do not have fly wires on them then some functions will not work as they do some wave forms
on those boards as well. look for red wima film caps on the VDM. Thats another give away.

Athanasios

[mrfixit]

[tse]

It's a long thread but should answer your questions.

https://www.curtpalme.com/forum_archived/viewtopic.php@t=19215.html

Scott

[mrfixit]

[Nashou66]

Thats the thread I was looking for!!! How do find these Scott? The search engine here is the only thing I can never use correctly it seams.

I book marked it now

Athanasios

[mrfixit]

First off, using the "hidden" green convergence options to "square things off" as much as possible first, made a big difference in getting a pretty damned good picture. And I changed out the 30k resistors w/68k to allow newer anamorphic ratios.
At the same time, seeing as I have a full spare heatsink, and I just as soon not stress the amps by forcing extreme convergence, I've started the various fly wire mods as detailed in the link provided earlier in the thread.

The convergence mods are clearly documented and both easy and "done". However the VDM mod is not as clear either in the photos or the descriptions. So bear with me here as I try to describe what I'm seeing as well as what I can't actually "see"...

OK lets start at "U8" where we have a fly wire and a cap. Based on the text, the cap is 100mfd 50v. it seems that the positive side is attached to pin 8. The negative side isn't actually visible but -appears- to be on the corner pin (13 if the numbers "wrap around"). Is this correct?
Next - the fly wire - looks like pin 12 to me.
Now, at the other end is where it visually goes to crap even when enlarging the photos...At U701 a resistor goes across the IC - one end on pin 9 (again - assuming numerical wrap around) but, the other end? Is it just to the fly wire or, is it the fly wire and pin 6? I can't really tell. Also the text refers to a 10k value but the pictures aren't too clear/representative of that value...

Once this is clarified and I've tested with success, I'll also add an "addendum" to that thread for others who may try this!

As always - thanks to all in advance!!!

Lewis

[karmat63]

Menec gave me the right pics (Thanks again, Menec). I think they show the VDM mod clearly:

http://www.curtpalme.com/forum/download.php?id=10172

Hope this help mrfixit (I send you the same pictures via pm) and everyone eventually interested in this mod

Carmine

[/img]

[mrfixit]

[Tim in Phoenix]

Send me your e.mail address, I'll get you some hi res pictures.


Tim

ehometech@earthlink.net

[mrfixit]

[mrfixit]

I just want to toss out a big thank you to all involved in this thread as well as the linked thread (which I will post in shortly for minor info tweaks).

Extra thanks go to Tim and TSE who followed up via emails with additional confirmations and hi-res photos to help clarify certain details.
You guys are all great and your knowledge pool is exceptional.

After cobbling pieces from the two "new" 8500's, with the proper SW (v4.2c), rom (U7 v5.2 on up), and fly wires, resistors, caps etc. I now have all of the additional geometry functions operational!

And yes, it does make a difference - after a full reset, and "roughing in" the base geometry settings, I looked at green convergences in the hidden menus and right off the bat I did not have to "fake it" via convergence adjustments which certainly lowers the stress on that sub-system...

I still have fine tuning to do (plenty) before I get my ISF buddy over to calibrate it, but the results are very good at the get-go.

Again - thank you all for the support and collective information, it is genuinely appreciated!

Lewis - aka mrfixit

[dvh99]

if all those geometry functions are out you betcha it is the dpb on the clm.
solder u7 straight on the dpb.

edit: seems like we were posting at the same time.

[mrfixit]