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This topic comprises 3 pages: 1 2 3
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Author
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Topic: DFP-D3000 crosstalk problem on optical input
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Marin Zorica
Jedi Master Film Handler
![](/ubbmembers/1716a.jpg)
Posts: 671
From: Biograd na Moru, Croatia
Registered: May 2003
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posted 06-04-2009 08:07 PM
Hi!
I'm bit confused here, have DFP-D3000, when trying to align best cross talk just can't get it good as usual, so I was mad, I did that million times and now problems....I hooked projector to another processor, also Sony but DCP-1000, normally I get picture on scope as this:
![-](http://www.film-tech.com/uploads/uploads0503/XTALK_DCP1k.jpg)
After that I just let projector run CAT97 and hooked cell cable and scope probes to DFP-D3000, but instead same, I get this on scope:
![-](http://www.film-tech.com/uploads/uploads0503/XTALK_DFP3k.jpg)
So obviously I have bad cross talk when using DFP, but why? As you can see on first is okay, and without touching cell or so connecting to this isn't same, I did use hadaphone connector on front panel as described in manual, but I also try TP102/103 on APR34 board which are direct preamp outputs from projector 1 optical input.
I look wiring 1000X times, all acording to manuals, also when I set sound head and calibrate level and HF on DFP processor do sound good, but this cross talk issue just killing me, I hope someone here will know more.
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Marin Zorica
Jedi Master Film Handler
![](/ubbmembers/1716a.jpg)
Posts: 671
From: Biograd na Moru, Croatia
Registered: May 2003
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posted 06-08-2009 01:37 PM
No!
Because when I connect only oen channel there is no signal on other. If there was crosstalk in processor than it will be there too with other channel disconnected.
I did researched a bit more, I tough maybe is some bad lead from back panel connector to APR34 board and I did found something unusual...that input stage in manual (schematic) isn't same as it on this board....don't know why but sure isn't, maybe it was some revision? On manual says units with serial 10001 an higher, mine is 10334....so it should be same?
![-](http://www.film-tech.com/uploads/uploads0503/APR34_PEC.jpg)
....there we can see that P1LH (pin2 on input dsub) is going to pin 5 of IC106, and P1LL (pin 6 on input dsub) is going to pin 5 of IC106.....but NO!
I've found different here, P1LH is going to pin6 of IC106, but P1LL is going to pin3 of IC106, and also pin3 and 5 are not connected together like on schematic, don't know why, but something is probably wrong here and HOT or COLD inputs are bad???
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