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 Post subject: Re: JVC TM-H and DT-V thread
PostPosted: Fri May 04, 2018 12:00 pm 



Joined: 02 Feb 2005
Posts: 281
Horizontal linearity is just fine. The *very slight* bowing on the left side is a pincushion "issue" (i.e. not a real issue). If the unit has separate pincushion and upper picushion adjustments, try those.
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 Post subject: Re: JVC TM-H and DT-V thread
PostPosted: Fri May 04, 2018 4:03 pm 


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Joined: 06 Feb 2005
Posts: 716
Location: Italy
lewolfeur wrote:
I have a problem with a 1900 which has 47k (focus and geometry is very good), from time to time the image shrinks horizontally and then returns to normal, also it shakes weakly in vertical. An idea which capacitor should I change?

Mine does it too (despite having just about 1k of use). Only on the vertical axis, and only by one or two scanlines, but it's quite annoying.

I've read a few CRT repair FAQs and the item that comes closer to defining what I see is the so-called 'breathing' problem here (third bullet point), but who knows it may be totally off the mark.


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 Post subject: Re: JVC TM-H and DT-V thread
PostPosted: Fri May 04, 2018 4:34 pm 



Joined: 06 Oct 2016
Posts: 10
I have an ikegami HTM1700R (rebadged JVC DT-V1710CG). That I can't really get to work well with my Sharp x68000. Has anyone got these to work with the x68000? I've tried using several extron units and most of time they just make it worse.


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 Post subject: Re: JVC TM-H and DT-V thread
PostPosted: Wed May 09, 2018 6:16 pm 



Joined: 08 May 2018
Posts: 7
Location: Denmark
Hey guys, in case it can help anyone with a JVC monitor (or Panasonic rebrands), who needs the IF-C01COMG card, and want a "real" PCB, I cloned the card and released the boards on OSHPark. Everything is made with SMD components, so some soldering technique is needed, but a steady hand, a good iron, and patience will get you far :)

Base board: https://www.oshpark.com/shared_projects/hMJMT0yM
SCART input daughter board: https://www.oshpark.com/shared_projects/LzrZ5J3b
3D printable bracket for the SCART board: https://www.thingiverse.com/thing:2888467
Untested BNC input daughter board: https://www.oshpark.com/shared_projects/GYx5pdjH

Made in KiCad, I'm gonna put it onto github as soon as I get each project isolated properly.

Enjoy! All thanks goes to "Ryoandr" who made this pastebin https://pastebin.com/EXqMBfcY, which gave me the schematics :)


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 Post subject: Re: JVC TM-H and DT-V thread
PostPosted: Sat Jun 23, 2018 10:20 am 



Joined: 31 May 2017
Posts: 1
Does anyone know what the best VMMaker options for the DT-V series are?

I know the basic resolutions this monitor can handle, but I wouldn't know where to start with getting all the exact timings it can display.


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 Post subject: Re: JVC TM-H and DT-V thread
PostPosted: Mon Jul 23, 2018 5:37 pm 


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Joined: 17 Jun 2012
Posts: 324
Location: UK
After a long long wait I finally received my consolised Neo Geo MVS and there's no upper skew on the DTV ! I know the modder used an LM1881 but everything else regarding the video signal is as usual. :)


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 Post subject: Re: JVC TM-H and DT-V thread
PostPosted: Fri Aug 17, 2018 11:02 pm 



Joined: 30 Sep 2015
Posts: 11
skum wrote:
Hey guys, in case it can help anyone with a JVC monitor (or Panasonic rebrands), who needs the IF-C01COMG card, and want a "real" PCB, I cloned the card and released the boards on OSHPark. Everything is made with SMD components, so some soldering technique is needed, but a steady hand, a good iron, and patience will get you far :)

Base board: https://www.oshpark.com/shared_projects/hMJMT0yM
SCART input daughter board: https://www.oshpark.com/shared_projects/LzrZ5J3b
3D printable bracket for the SCART board: https://www.thingiverse.com/thing:2888467
Untested BNC input daughter board: https://www.oshpark.com/shared_projects/GYx5pdjH

Made in KiCad, I'm gonna put it onto github as soon as I get each project isolated properly.

Enjoy! All thanks goes to "Ryoandr" who made this pastebin https://pastebin.com/EXqMBfcY, which gave me the schematics :)


Nice work! Any chance you can clone the board for the IF-C01CMG too??? :lol:

but seriously if anyone know where to track one down I would love to purchase one to use with my JVC DT-V100CG display.


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 Post subject: Re: JVC TM-H and DT-V thread
PostPosted: Fri Aug 17, 2018 11:17 pm 


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Joined: 22 Jun 2011
Posts: 1283
Location: Bedfordshire, England.
Whilst not exactly related to this thread i though it would probably be best to ask here.

Does anyone know what the difference is between the JVC BM-H2000PN and the JVC BM-H2000PN-K, not sure what the 'K' signifies??


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 Post subject: Re: JVC TM-H and DT-V thread
PostPosted: Sat Aug 18, 2018 12:08 pm 



Joined: 08 May 2018
Posts: 7
Location: Denmark
bovined wrote:
skum wrote:
Hey guys, in case it can help anyone with a JVC monitor (or Panasonic rebrands), who needs the IF-C01COMG card, and want a "real" PCB, I cloned the card and released the boards on OSHPark. Everything is made with SMD components, so some soldering technique is needed, but a steady hand, a good iron, and patience will get you far :)

Base board: https://www.oshpark.com/shared_projects/hMJMT0yM
SCART input daughter board: https://www.oshpark.com/shared_projects/LzrZ5J3b
3D printable bracket for the SCART board: https://www.thingiverse.com/thing:2888467
Untested BNC input daughter board: https://www.oshpark.com/shared_projects/GYx5pdjH

Made in KiCad, I'm gonna put it onto github as soon as I get each project isolated properly.

Enjoy! All thanks goes to "Ryoandr" who made this pastebin https://pastebin.com/EXqMBfcY, which gave me the schematics :)


Nice work! Any chance you can clone the board for the IF-C01CMG too??? :lol:

but seriously if anyone know where to track one down I would love to purchase one to use with my JVC DT-V100CG display.


Thanks! If I had the schematics, and the board, like IF-C01COMG, is only "normal" components, then most likely yes... But without the monitor to test on, it would be up hill :P

In relation, here are KiCad projects:
https://github.com/skumlos/if-c01comg-clone (SMD version)
https://github.com/skumlos/if-c01comg-clone-tht (Through hole version)
https://github.com/skumlos/if-c01comg-scart-input (SCART board)


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 Post subject: Re: JVC TM-H and DT-V thread
PostPosted: Tue Aug 21, 2018 7:01 pm 



Joined: 01 Jul 2016
Posts: 38
Has anyone tried to remove the anti glare coating from the DT-V? Is it similar to Sony PVM and BVM monitors?


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 Post subject: Re: JVC TM-H and DT-V thread
PostPosted: Wed Aug 22, 2018 6:49 am 


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Joined: 17 Jun 2012
Posts: 324
Location: UK
The seller I got mine DT-V from removed it prior to the sale so I never saw what I looked like with it. He mentioned its hard work and took him several hours to remove :o


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 Post subject: Re: JVC TM-H and DT-V thread
PostPosted: Sat Aug 25, 2018 10:18 am 



Joined: 01 Jul 2016
Posts: 38
I have a few DT-V1710CG monitors where the screens are scratched, and I'm wondering if it's hard to remove the coating, and how is it done. The monitors are in good condition except for the screens :/

Image


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 Post subject: Re: JVC TM-H and DT-V thread
PostPosted: Sat Aug 25, 2018 10:25 am 



Joined: 03 Mar 2005
Posts: 315
I live in Japan and used this windshield polish. It took over and hour to really get the coating off. It came with its own polishing pad.


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 Post subject: Re: JVC TM-H and DT-V thread
PostPosted: Sat Aug 25, 2018 6:47 pm 



Joined: 30 Dec 2014
Posts: 480
There are a few videos online with people removing the AG coating on different crt monitors and the process is all the same. Remove the front bezel, peel away at the corners, and then just use brute strength. I would only do it as a last case scenario like in your case where the scratches are bad. But if you keep away from the light then youll be fine.


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 Post subject: Re: JVC TM-H and DT-V thread
PostPosted: Sat Aug 25, 2018 9:22 pm 



Joined: 01 Jul 2016
Posts: 38
tacoguy64 wrote:
There are a few videos online with people removing the AG coating on different crt monitors and the process is all the same.


I'm not so sure about that. Sony monitors have a plastic screen that You can peel off, but not all monitors are the same. I'm not realy sure, but I think that on the DT-V there is some kind of chemical coating.

My friend that has my monitors at the moment, tried to use some isopropanol on one of them, and it seems to work quite well! The coating is comming off pretty easy :) Image


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 Post subject: Re: JVC TM-H and DT-V thread
PostPosted: Sun Aug 26, 2018 3:21 am 



Joined: 03 Mar 2005
Posts: 315
Quote:
I'm not so sure about that. Sony monitors have a plastic screen that You can peel off, but not all monitors are the same. I'm not realy sure, but I think that on the DT-V there is some kind of chemical coating.


This is correct. If you look up the patents, you can see that the coating method involved using hydroflouric acid to create the bond with the glass. That's pretty serious business.

Quote:
My friend that has my monitors at the moment, tried to use some isopropanol on one of them, and it seems to work quite well! The coating is comming off pretty easy :)


Isopropyl alcohol is not strong enough to completely remove the coating on DT-V monitors in my experience. It might get off the stuff that had mostly lost its chemical bond already, but you're almost certainly not going to get the screen 100% clear of it.

I tried isopropyl alcohol, acetone, lye and hydrochloric acid (10% solutions), and even baking soda and mineral oil, and the only thing that got up the coating that was still strongly bonded to the screen was that windshield polish. Its main ingredient, by the way, seems to be cerium oxide, if that helps.


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 Post subject: Re: JVC TM-H and DT-V thread
PostPosted: Sun Aug 26, 2018 3:54 am 


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Joined: 09 Apr 2014
Posts: 1119
The HF is probably just to etch the glass and the anti glare is sprayed on rather than applied as a film. That would explain why only an abrasive can remove it.


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 Post subject: Re: JVC TM-H and DT-V thread
PostPosted: Thu Sep 20, 2018 5:11 pm 



Joined: 01 Jul 2016
Posts: 38
Last week I've recived my monitors, so I've tried to remove the coating on one of them (from march 2008 with 23k hours) using isopropyl alcohol first. It worked realy great!

Image

It came off almost copletely after 5 minutes of work (there is still a bit left on the edges)!

Happy with the results, I've tried to do the same on my second DT-V (from January 2007 with 2,1k hours), but this time with no luck. The coating is coming off, but just barely. So I followed SamIAm's advice, and ordered some cerium oxide polish. Hope that will do the job :)


And I have another question: I have a few HD SDI input cards. Are they useful in some way? I thougt maybe I will buy a HDMI to HD SDI converter just for fun, to see how it will work. Anyone tried that?


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 Post subject: Re: JVC TM-H and DT-V thread
PostPosted: Tue Oct 30, 2018 9:00 pm 



Joined: 18 Jan 2008
Posts: 22
Location: Germany
I received a JVC TM-H1750CG Monitor this Sunday. The Preowner had removed the 3 capacitors for RGB Mod, but I want to make an YUV/RGB Card instead Mod.
How can I find the circuit diagram for this monitor ? I need the values for these 3 capacitors:
https://i.imgur.com/ysauZHt.jpg


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 Post subject: Re: JVC TM-H and DT-V thread
PostPosted: Tue Oct 30, 2018 10:46 pm 


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Joined: 03 Dec 2015
Posts: 128
Location: Norway
Moosmann wrote:
I received a JVC TM-H1750CG Monitor this Sunday. The Preowner had removed the 3 capacitors for RGB Mod, but I want to make an YUV/RGB Card instead Mod.
How can I find the circuit diagram for this monitor ? I need the values for these 3 capacitors:
https://i.imgur.com/ysauZHt.jpg


They are 0.1 microfarad, 16V.


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 Post subject: Re: JVC TM-H and DT-V thread
PostPosted: Wed Oct 31, 2018 4:02 pm 



Joined: 11 Sep 2014
Posts: 128
Xer Xian wrote:
Einzelherz wrote:
My multisync Sony PVM cracks when the input resolution changes. It's probably normal?

I don't know, if yours does it too I guess so. I thought it was an odd behaviour given that all of my CRT monitors are silent when switching resolution through the OSSC. It also makes me wonder about what sets apart VGA from TV monitors - ability to sync to all contents within a given frequenct range vs standard broadcast res support only? Different gamma curve maybe? What's for sure is that a LaCie Electron IV went for €500/600 while the DT-V17 was five times that, for whatever reason.

Thanks for your take on the other questions :)



I think it depends on how it switches resolution (mechanical or in software). My tri-sync arcade monitor makes a click sound when switching 15khz to 24 or 31. It sounds concerning at first - like you aren't sure if it is meant to be like that but it is.


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 Post subject: Re: JVC TM-H and DT-V thread
PostPosted: Wed Nov 07, 2018 3:40 pm 



Joined: 07 Nov 2018
Posts: 1
I recently acquired a Japanese Victor DT-V1700C. I'm running it in the US through a VCT VT-500J 500W step down converter. When I turn it on, the power light turns green and the unit seems to boot up, but then it makes a clicking noise and I get no picture. The power light turns orange, and Input lights A and B start to blink.

Here's the service manual on the blinking input lights. It's all a bit over my head:

Image

Could I be using the transformer wrong? I'm a proficient solderer—any idea if I could fix this as long as I knew what I was looking for?

Thanks.


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