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Revox
Joined: 13 Feb 2008
Posts: 158
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| Posted: Wed Sep 09, 2009 11:16 am Post subject: Marquee 8500 - s-Video problem - DCM board |
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Hi,
I have got problems with an S-Video Signal. When i feed the 8500 with svideo (it's not usual because he prefered RGBHV food) i can see horizontal waves. It looks like the Picture is swimming.
As i looked at the DCM Board, i noticed a broken SMD resistor (mechanical broken). It's R 198 (or 196?) found near U9 on the left side of the board.
Can someone give me the value of this Resistor?
I ask, because I cannot find the chematics for the DCM board in the web.
Greetings from Germany, Stefan
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Wed Sep 09, 2009 4:23 pm Post subject: |
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you know that S-video is 480i max right? It's not even progressive scan capable.
Not sure what you mean by DCM board? the s-video - composite module is usually called the Multi Standard Decoder board. There were many versions of this board, and they are all bad picture quality wise with chroma abberations, noise, and such but the later ones , post 1997, are much better than the early ones.
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PaulB
Joined: 26 Oct 2007
Posts: 359
Location: Bonnie (but rainy) Scotland
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| Posted: Wed Sep 09, 2009 5:00 pm Post subject: |
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I see it on the Multi Standard Decoder board. R196 casing reads 4322 and R198 reads 433 - one of our more qualified fellow CRT'ers should be able to fully indentify what that actually means (I have absolutely no idea  ).
Curse my cheap camera 
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Paul
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Revox
Joined: 13 Feb 2008
Posts: 158
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| Posted: Wed Sep 09, 2009 6:42 pm Post subject: |
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Ok, the goal is nearly reached! I asked the same question in "beisammen.de" and noone answered.
The Problem is, that the resistor numbers are very bad printed on my Board.
I need the value (or number) of the SMD resistor marked red.
Shame on your cheap Camera, connot gues the print.
The Signal is Pal, it's bad i know! To watch TV it is ok for me. I like to prefer RGB via Scart and Sync Stripper (Europe Standard) but my M. only has one RGB input and i don't whant to use an external switch.
Ive got Board of the 9.1997 so its a late version
Stefan
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PaulB
Joined: 26 Oct 2007
Posts: 359
Location: Bonnie (but rainy) Scotland
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| Posted: Wed Sep 09, 2009 6:58 pm Post subject: |
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Aha! Thats R199, the casing reads 101.
Again, someone here will be able to tell you exactly what that resistor is, just hang in there 
| Revox wrote: |
Shame on your cheap Camera, connot gues the print.
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Its bloody awful isn't it and I'm too skint to get another one
I just noticed, it does actually say DCM on the board, right at the top just like you said - learn something new every day!
EDIT Hey, how rude of me, I almost forgot, welcome to the Forum Stefan.
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Paul
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Wed Sep 09, 2009 7:53 pm Post subject: |
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101 on SMT resistors = 100 ohms.
I can just sell you a working decoder board for $10 plus shipping.. I have lots.
BTW, the Marquee decoder is crap, I like the ones in NECs much better.
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Revox
Joined: 13 Feb 2008
Posts: 158
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| Posted: Wed Sep 09, 2009 10:32 pm Post subject: |
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Thanks, i already put a SMD Resistor with 101 into this place (i was not exactly shure). Usualy the SMD prints are not normed.
So my problem still exists, but it is not so important for me. It would have been nice when the resistor had caused the "waves".
The Price is really ok, but with shipping costs, I think it would be better to invest in additional RGB inputs. I thought you only need a "passive" additional Board for the VIM?
I got some "little" problems with the magnetics setup as well, but i will open a new post for this.
Oh, it wasn't my first post. In my first post is 1 year ago, i had problems with my Sony 722 (was a cold soldering) .
Then i got an Sony 1271 and now i got 2 "cheap" 8500er. A real argument that im in CRT-hobby is in the appendix. Now all CRT's are sold except the first 8500.
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perisoft
Joined: 29 Aug 2007
Posts: 2920
Location: Ithaca, NY
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| Posted: Wed Sep 09, 2009 10:45 pm Post subject: |
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The problem with s-video is using s-video... 
I've been contemplating turning an old PC with a video input card into a cheapo transcoder/scaler for the s-video out of my old TiVo (no useful cable HD here, so..). Might be something to think about if you like screwing around with stuff - what are you using the RGB input for as-is? If it's already an HTPC, then you'd be golden using a video in card to get your PAL.
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Revox
Joined: 13 Feb 2008
Posts: 158
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| Posted: Wed Sep 09, 2009 11:19 pm Post subject: |
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Jep, you're right, a HTPC is connected. The Problem is the fact, that i don't whant to switch on my PC to watch TV.
It's digital Cable Tv, the quality is not world's away from dvd.
I tried to use D-scaler with my ATI X1800 video in, but it didn't work good (don't know the reason).
In the last moths i only watched one our TV, so its not really headache worthy. Maybe it was only the idea of having a excelent "working" CRT.
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perisoft
Joined: 29 Aug 2007
Posts: 2920
Location: Ithaca, NY
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| Posted: Wed Sep 09, 2009 11:37 pm Post subject: |
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| Revox wrote: | | Jep, you're right, a HTPC is connected. The Problem is the fact, that i don't whant to switch on my PC to watch TV. |
Well... don't turn it off! Problem solved!
yeah, I get you. I guess another option would be to find an outdated scaler/doubler that can fix up the s-video a bit and pass-through the RGB. Should be fairly cheap at this point... get some Fuhroojee thing that was $50,390,259,402 in 1995 and is gathering dust in some AV store's back room now.
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Thu Sep 10, 2009 12:08 am Post subject: |
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With the price of scalers being dirt cheap now, pick up a cheap $150 Faroudja that was $20K back 10 years ago, get an RGBHV switch, and call it a day.
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Revox
Joined: 13 Feb 2008
Posts: 158
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| Posted: Thu Sep 10, 2009 9:59 am Post subject: |
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Are the RGB input boards for electrohome aviable for a "students" price? The Scart standard with RGB (ok it isn't progresiv) is just good enought. I don't like the idea of an external RGB switch, don't know why...maybe more plugs destroying the HF signal?
I paid 150 dollar is what i paid for my second 8500 ;-P
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Thu Sep 10, 2009 4:30 pm Post subject: |
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| Revox wrote: | Are the RGB input boards for electrohome aviable for a "students" price? The Scart standard with RGB (ok it isn't progresiv) is just good enought. I don't like the idea of an external RGB switch, don't know why...maybe more plugs destroying the HF signal?
I paid 150 dollar is what i paid for my second 8500 ;-P |
are you talking about a simple secondary RGB input for the expnasion slot on the VIM. Yes, those are cheap and plentiful. I would put a Moome HDMI card there though 
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Revox
Joined: 13 Feb 2008
Posts: 158
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| Posted: Thu Sep 10, 2009 4:48 pm Post subject: |
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It' so cruel to be a poor student!
Do anyone whant to offer such a card?
I trust in my ATI Card to convert digital into analogue signal.
Ok.... the signal Amplitude for white is only 0,5V but, its cheap.With a magical tool HDCP isn't a problem to. I got a blu ray drive for 2 days now, and i am realy interested in a good resolution in "good" films. But there are only a few "good" in blu ray out there (oohhh no discoussion about my film taste, its only a statement!)
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Zolzar
Joined: 26 Jun 2009
Posts: 252
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| Posted: Fri Sep 11, 2009 5:06 pm Post subject: |
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Out of curiosity I pulled my MSD board and to my surprise found C100 was for the most part completely blown off the board. Does anybody know the cap value? If not it's not really that important. I never use the Composite or S-Video inputs anyway. I just like having them handy should the old VCR decide to resurrect itself. Thanks!
John
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PaulB
Joined: 26 Oct 2007
Posts: 359
Location: Bonnie (but rainy) Scotland
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| Posted: Fri Sep 11, 2009 5:31 pm Post subject: |
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C100 is 47uf 16v on my board, same as the one in the picture above at C2.
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Zolzar
Joined: 26 Jun 2009
Posts: 252
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| Posted: Fri Sep 11, 2009 6:30 pm Post subject: |
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Sweet! Thanks!!!!
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Revox
Joined: 13 Feb 2008
Posts: 158
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| Posted: Fri Sep 11, 2009 10:38 pm Post subject: |
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Thats interesting: On my Board a Cap was blown of too, so the 12V voltage regulator was directly shorted.
Is it the same on your Board to?
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Zolzar
Joined: 26 Jun 2009
Posts: 252
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| Posted: Sun Sep 13, 2009 11:43 pm Post subject: |
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I'm not sure about the voltage regulator. I need to do some poking around with a meter at some point. Right now it's really not too much of a priority since I've never used the inputs.
I would suspect though it could be a short since when I first got the projector and booted it up I heard a "snap" and then the distinct smell of "oh sh*t!!!! Turn it off!!! Turn it off!!!!" . It's worked fine since but I'm just happy to know that it wasn't anything critical that had burned up initially.
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