CurtPalme.com Home Theater Forum

[1031]

[Nashou66]

Hi Jarmo! Which chips did you get? the ones for the focus board? the TLE Excalibur series of op amps are nice because of thier
low noise and they are not finicky even though they have a higher slew rate than the original one they replace (TL07x/08x and MC3407x/8x).
Yes the 680 ohmites are on back order for me too, i would not use the added resitor another solder point at thet high voltage just doesnt sound
to safe to me.

Athanasios

[1031]

Yes, those for fcm. Now its only issue to found some time to do those mods.

[Nashou66]

I have been practicing on an old 2005-03p VIM before I atempt my 2035-02 and 2035-03 Vims. I changed all the op-amps except the internal video CL430's. Used the data sheet speced caps for the power buffering and added 100pf caps across all those. changed out some of the tants with i higher value///however i had to remove soem as they drew to much power nad the set would power down and one again, I plan to lower the value of those caps a bit and retest. I mist say this old out of date vim looks very good, i would dare to say better than the 2035-02p stock Vim. Deep blacks with out any crush, colors are very natural even the pastels which are hard to get right according to Mike Parker Who is our insperation for all this Marquee maintanence and upgradeing. I am no Electrical engineer so i dont understand all things i did completly but understand the concept. Main thing I was out to accomplish was to ,lower the noise floor of the Projector. This drop would be equivalent to increasing the output of the projector with out cranking up the contrast. By useing lower noise chips, faster higher bandwidth video op amps and the proper rated coupling caps for those video amps This vim Is great! I put in my stock 2035-03p in to watch a movie and after 10 minutes I thought " no way does my old Vim look better or as good. So I swaped out the new Vim for my Extensivley moded 2005-03p vim and new that this was a great upgrade and if i use the same philosophy on the 2035-03p vim i'll really have a great picture. And this is with out me doing a coplete and thourough set up.
I should also say that I have moded my neck borads to Jeahong Lees sugestions and Also did a complete cap and chip change on the Focus Modual And the power rail caps on the CLM (more caps and chip changes to come on that board). I still also have to do the Vertical deflection modual and convergance modual And the chip change to the same ones i Used on the vim for the neck boards.
I have another set of different op amps i plan to put on my second older spare Vim. These will need more work as iI think they will need feedback resitors chaged out as well as the coupling caps. but first i want to complete all the other boards before i take on that Vim.
Now I am doing this just to learn and for fun and should warn that I am doing this with risk to possibly damaging my Projector but I have a spare so I can take the risks. I will post on the relliability of the VIM mod as I think the others are fairly safe since they are just newer better part replacements with no real change of demands from the power supplies. And I am still waiting on the higher value resistor change on the HVPS to elliminate the Tube intesity Anomoly some here have noticed with the mod to that board.

Any how here are some pics i took today. not a full set up I must say. still need to get the grey scale but figure why bother till i finish all the mods.
Also my pause feature sucks on my LG BH100, useing a Fuji F10 camera that seems to add some red push.

Marquee 8500 Mods so far, HVPS,CLM(partial),Focus board, Neck boards, HD144's, Enermax LVPS fans/Dynamat sound deadening, And my 2005-03p VIM Mod/Upgrade.

@1080p48Hz


















Athanasios

[barcoguy]

WOW! that looks nice.


I can't wait until I am there!

I goofed! I damaged one of the amps on the V board while trying to remove the heat sink clips. Does anyone have a source on this?

[sundance]

Depending on the cost I am in!

Steve

[Nashou66]

[PaulB]

[Nashou66]

Here are some more screen shots from the 2005-03p Vim mod. Still crapy pause function from my player, it adds noise and isn't a sharp frame clip as a result...Looks much nicer in person. Still not properly color calibrated either.

















Athanasios

[Nashou66]

Some changes to the incoming power lines on the old Vim and cap changes on the CLM about 40 so far another 60 or so to go !. here are a few more shots...12 foot screen contrast and brightness @ 50.









This on you can see my convergance isn't 100%



This one i like the subtle color variations in the pic especially the foilage in the back ground..this is what Mike P is always talking about. it gives images a more 3D look.



Athanasios

[Nashou66]

Did some work on the CLM this time. changed out the three op amps that control the focus wave forms these are those noisy distortive op amps same as i changed on the focus boards. u73,76 and 82 not all clms are the same so they might be different on older boards. I also took out the ceramic caps for these and out in a 1uf smt A case tantalum and also a 22uf diped tantalum.

some pics : all blu-ray via LG bh100>lumagen HDQ>moome Vim-HD> modded 2006-03p VIM 8500 marquee.

Sunshine

















This is my Favorite of the bunch



Athanasios

PS: I added up most of the parts for the 2006-03p vim mods and it came to under 100 bucks from newark. some parts can be gotten for free from the chip makers and some of the caps i got from e-bay. but this is a list if you had to buy all the parts from a vendor. Also the 15uf caps i found on e-bay i use as some replacements for some 10uf caps on newark(TIM156K050P0Z) are 85 bucks each!!!! I think there not made and thats why they are so high not sure but i got 25 for 21 bucks

[Nashou66]

Ok, Every who was holding off on doing the HVPS mod because of some reports of the problem that when one color is being displayed(using the one tube on function) that the other tubes are also still on much brighter than before the mod. The required resistors are 560kohm ceramics 1-2 watt. After doing the mod and checking the value of the old resistors i found mine to be 680k average. I had this anomaly also after the mod. I thought that maybe those crapy carbon comp resistors where that far off even new...so i ordered some 680k ceramics and finally got them in today(back ordered). I instaled them a few hours ago and watched a movie. All is well again. the tube intesity anomaly is gone. no change to G2's needed. so you might want to spend the extra money and order both types. the speced value and a set of the value of one of the removed resistors. This way if you get that anomaly you can swap out resistors.

Athanasios

[AnalogRocks]

So the manual spec's 560kohm but you had to put 680kohm back in there to get proper tube brightness?

[AnalogRocks]

So the manual spec's 560kohm but you had to put 680kohm back in there to get proper tube brightness?

[Nashou66]

[AnalogRocks]

Thanks for the clarification.

[AnalogRocks]

Thanks for the clarification.

[Nashou66]

Something I forgot to look for after i put in the higher value resistors. With 560k resistors i saw a slight decrease in back ground noise but not that much the thing i really noticed was the deeper blacks. Now the blacks are still as good but the noise i saw on the green and blue tubes has dramaticly decreased compared to the original 560k. So if you have that problem with tube intensity definitely put in the value that is closest to your old resistors. Now remember, I also changed out the caps to a higher quality cap and all other ceramic resistors in that supply.

here are some screen shots of Shoot em' Up...Fun Movie!













Athanasios

[PaulB]

As always, struggling to find certain parts in the UK at a reasonable price ($30 added to order price!).

Will this do for the HVPS at C6 and C3 (1uf 400vdc) http://uk.farnell.com/1413833/passive-components/product.us0?sku=VISHAY-MKT1813510405 ? (Or this perhaps http://uk.farnell.com/1413929/passive-components/product.us0?sku=VISHAY-MKP1839510404 )

And these for HVPS C1 and C2 (0.47uf 600vdc) http://uk.farnell.com/1166880/passive-components/product.us0?sku=VISHAY-ROEDERSTEIN-MKT1813-447-63-5-G ?

Two of these are axial polyester caps instead of axial polypropylene - does this make a difference?

I hate having to ask what I suspect is very basic questions, sorry.

Many thanks guys,
Paul

[Nashou66]

I used these parts, for the .47uf vishay # MKP1845447634 http://www.newark.com/jsp/search/productdetail.jsp?SKU=18M2493

and the 1uf cap i used: sprague # V-735P105X9400L http://www.newark.com/jsp/search/productdetail.jsp?SKU=37M0653

from newark which gets parts from farnell also.

but if they have the same specs then it should be fine.

Athanasios

[tse]

[Nashou66]