Return to the CurtPalme.com main site CurtPalme.com Home Theater Forum
A forum with a sense of fun and community for Home Theater enthusiasts!
[ Products for Sale ] [ FAQ: Hooking it all up ] [ CRT Primer/FAQ ] [ Best/Worst CRT Projectors List ] [ Setup Tips & Manuals ] [ Advanced Procedures ] [ Newsletter ] 

Blu-ray disc release list and must-have titles. Buy the latest and best Blu-ray titles to show off in your home theater!

 As this forum is rarely used anymore, we've locked it. Feel free to browse and read. Questions? Please reach out to us directly. Cheers! 

Marquee.. Possible convergence board improvements.!!
Goto page Previous  1, 2
 
This forum is locked: you cannot post, reply to, or edit topics.   This topic is locked: you cannot edit posts or make replies.    CurtPalme.com Forum Index -> CRT Projectors
Author Message
dvh99



Joined: 25 Dec 2009
Posts: 2158
Location: nederland

Posted: Wed May 29, 2013 4:05 pm    Post subject:
would something like this work gjaky you think?

bias.png
 Description:
active bias circuit
 Filesize:  17.58 KB
 Viewed:  1507 Time(s)

bias.png

_________________
1 answer always poses multiple questions.
marquee 9500ultra HD10L moome hdmi1.3 v3+ some mods.
Back to top
gjaky



Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary

Posted: Wed May 29, 2013 4:14 pm    Post subject:
Yeah, it looks good for a starting, but of course needs to be taylored to the convergence amplifier. But first it would be important to understand where is the drifting comes.
_________________
projectors in the past : NEC 6-9PG xtra, Electrohome Marquee 6-7500, NEC XG 1351 LC ( with super modified Electrohome VNB neckboard !!!)
current: VDC Marquee 9500LC
The MOD: VNB-DB, VIM-DB
Back to top
View user's photo album (1 photos)
dvh99



Joined: 25 Dec 2009
Posts: 2158
Location: nederland

Posted: Wed May 29, 2013 4:19 pm    Post subject:
agreed, i have the layout for the circuit btw.


_________________
1 answer always poses multiple questions.
marquee 9500ultra HD10L moome hdmi1.3 v3+ some mods.
Back to top
gjaky



Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary

Posted: Wed May 29, 2013 9:18 pm    Post subject:
Unfortunately I haven't touched a marquee in a year at least, so can't help much with real test results.
I would try to observe the signals with a good multimeter/oscilloscope on HDM, VDM, where is the static convergence correction, as Mike pointed out earlier, then on the convergence board.
BTW, the green and blue horizontal static convergence is driven by the same IC (U7) on the HDM, the red has a separate IC (U11), so this is an other clue.
_________________
projectors in the past : NEC 6-9PG xtra, Electrohome Marquee 6-7500, NEC XG 1351 LC ( with super modified Electrohome VNB neckboard !!!)
current: VDC Marquee 9500LC
The MOD: VNB-DB, VIM-DB
Back to top
View user's photo album (1 photos)
This forum is locked: you cannot post, reply to, or edit topics.   This topic is locked: you cannot edit posts or make replies.    CurtPalme.com Forum Index -> CRT Projectors All times are GMT
Goto page Previous  1, 2
Page 2 of 2
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum