CurtPalme.com Home Theater Forum

[pascal ht]

Hello,

My setup is this:

PS3 > hdfury2 > 8500LC

If installed the PS3 as if a 1080P device was attached.
Depending on the game the resolution seems to change between different modes.
I have got no idea to which resolution it switches, but some resolutions don't use the full width of the screen even if horizontal width is at 100.
My guess is that it has to do with me living in Europe and the 1080i 50Hz or 720p 50Hz issue, therefore having "very long retrace time".
I also misinterpreted the HDfury2 advert, thinking it would solve this problem.

My question is this: is there a way of increasing the horizontal width by tweaking something in the PJ.

here are my thoughts:

1) Tweaking horizontal width coils does not help since there is a kind of feedback keeping the green size constant.

2) lowering the input to the feedback from green (increasing R117) should result in a higher width: it should increase the output of the modulator to the deflection circuitry.

3) increasing the flyback capacitor (C8, C13 HDM) in the setting "long" might increase the amplitude of the visible part. This has the advantage that there is no current increase in the deflection coils.

[Nashou66]

there is Jumper under the daughter board that can be added or taken away, i think it needs to be added . Aslo i found you can change out C50 to same value higher voltage, that helps if the cap there is original one or just old.

Another thing I discovered when i was changing out resistors on the VDM for getting the 2.35 aspect squeeze for running 800p for scope movies was that after i did the mod the raster went really wide. Over the edges of the tube, I had to do a complete initinalization to get it to back but the raster was now wider and i was able to control it better, increase it that is.

If all else fails go into green convergence and widen it that way.

Athanasios


PS: I am also getting those Longbow 8500 Ultras in soon, I think they have soem changes for allowing wider aspect. I know the VDM resistor change is one of them, i'll look at those parts you listed and compare them to my boards.

[tse]

[HK-Steve]

Change R156 to 16k, this will give you more width.
Located under the Daughter Board


Cheers
Steve

[pascal ht]

Thank you for your help.

1. The jumper, under the daughter board, was easiest to try out, but it was in the closed position and that is the position needed for highest width.

2. I increased the caps, to 3n3F in parallel with 5n6F (instead of 3n3 parallel with 3n3). that gave a clear increase in width (some 8%), but not enough (I didn't want to go much higher in capacitance).

3. The increase of R117 or R156 leads together with the capacitors to enough width . R117 has the advantage that the setup is minimally affected.

4. I didn't try changing the VDM. I was wondering if it was not psychological that an decrease in height leads to an increase in width.

5. Green convergence/geometry seemed tricky to get correct, but it is a good idea I think, as last resort.


I can finally use the full screen surface of the tube (and the screen) again.

Pascal

[ronaldus]

Hi everybody,

I have the same problem with my 9500lc but I tried some of the options (jumper and R156). I get no increase in width at all.

It's as if something saturates. If I increase the H size then above 35 or so nothing happens The raster on the screen stops increasing as if there is no more power available. If I take the jumper P7 out the max width doesn't change. If I increase R156 to 15K as a test the width doesn't increase and the only difference i see is that while increasing the H size after 28 nothing happens. this indicates that the mod works but the amplifier cannot follow.

I suspect that C50 needs to be changed.

Would this be a valid diagnose?

regards,

Ron

[HK-Steve]

I would say faulty HDM, if you changed the resistor and the jumper with no change.


Cheers

[ronaldus]

Hi Steve,

I don't think there's something wrong with the HDM because at 60 Hz and higher everything works fine and I have enough width.

I have the new moome box ext v3 and i can also do 720p120hz with no problems. It's only at 50hz i cannot go wide enough. It's as if there's not enough voltage or current available. The C50 is in the power section of the H modulation amplifier.

by the way Steve where are you situated in Switzerland?

I live in France close to geneva.

[HK-Steve]

Yes, I am in Wadenswil 8820 Switzerland.

Seems something wrong still,
I am running 1080p @72 and 75Hz with no problems with width.
Before the resitor change, was running out of size. Just.
I changed the resistor, then had no issues at all.

Cheers

[ronaldus]

Hi Steve,

Wadenswil thats quite far from geneva. It's a pitty because I would be curious to see a fellow marquee owner's setup to compare:-)

Yes i can run at those refresh rates aswel. it's only 50hz that's a problem. I'll do some more tests. If i could find a cheap scaler that would do the job and i could run at 60hz but I prefer not to add up boxes. I need a surround amplifier though. If i could find one that could do 50 to 60hz scaling then I would be settled I was thinking of the onkyo TX-nr609 with the Qdeo chip but i don't know if that one can do frame rate conversion. I also saw that emotiva has their preamp umc-1 on sale and that one can do framerate conversion but i don't know about the scaling quality. The best is that i can solve the width problem.

I'll keep you informed.

regards,

Ron.

[HK-Steve]

I do have a HD Leeza, I am not using it anymore,
If you would like to come to pick it up, it is yours, for free.

Plus would offer beer on tap and show you my system.

I have never run 50Hz, too much flicker for me.


Cheers
Steve

[ronaldus]

Hi Steve,

Sorry for my late answering but i was on a bussines trip.

I would love to come over and have a look at your setup

You can send me a PM to organize the visit.

regards,
Ron.

[ronaldus]

Hi Steve,

Sorry for my late answering but i was on a bussines trip.

I would love to come over and have a look at your setup

You can send me a PM to organize the visit.

regards,
Ron.

[HK-Steve]

PM sent,

[ronaldus]

Hi everybody,

I'm still working on my projector and doing the TB upgrades before putting it on the ceiling.

I want to find out whats wrong with my HDM.

If I'm at 60hz and select between long and short retrace the aktive image changes size and I hear some relays clicking inside the projector This shoul be normal.

If i go to 50Hz and I do the same excerse nothing happens. long or short retrace doen't make a difference in image size neither is a relay clicking.

Could one of you test this to see if this is normal behaviour?

thanks,

Ron.