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Post by Casethecorvetteman on Jun 23, 2016 8:17:05 GMT -5
Hi all, got this board here that ive never been able to figure out its purpose:   It connects to the newer style 909 main mother board, then has a cable to each neck board. |
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Post by barclay66 on Jun 24, 2016 2:25:26 GMT -5
Hi,
Can You show some pictures where it connects to the controller and at least one of the neck boards? Maybe the connectors over there shed some light on its function.
Those three identical chips are A/D converters specified for up to 100KHz (quite slow, definitely not for digitizing video signals). So I would believe that this board reads some kind of slow-changing value (e.g. average beam current) and tells something back to the controller. Maybe it was used for evenly adjusting brightness and/or contrast levels in a blend configuration. Or it could monitor tube aging for keeping the picture brightness constant over time. Would be quite useless in a single PJ configuration.
What happens if You disconnect it? Some kind of error message and/or missing menu items could yield more information...
You asked about this and another board about a year ago on Curt's already, didn't You?
Regards,
barclay66
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Post by gregstv on Jun 24, 2016 2:36:46 GMT -5
It looks like the board for the IRIS 3 board.
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Post by barclay66 on Jun 24, 2016 4:06:42 GMT -5
Hi,
I don't think so. The IRIS board connects to the controller via one larger connector and to the camera with a small one. No connections to the neck boards...
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Post by dummyload on Jun 24, 2016 6:17:40 GMT -5
I have that board to ,I studied the board a bit together with the neckboards with the extra 5pin connector which it is connected to.
These neckboards have an electronic toggle swith at pin1 of I100 (g2.reg) other connection of the swith goes to pin4 of the extra connector.
Pin1 of the extra connector sets this extra swith. Switch disabled (0v) makes the neckboard work normaly (same as a neckboard without this connector)
Activating this swith makes the the g2.reg coming from the extra board and no more from I100 , it also disables Q100 (ibcl)
There is an additional resistor divider at collector Q7 (g2) of the neckboard ,buffert with an opamp and goes back to the extra connector pin3.(g2 feedback signal to the extra board)
pin2 is ground
pin5 to much trouble to follow complicated extra circuit.
So it has mainly to do with the g2 being controlled by that extra board.(but for what reason?)
I just wanted to know if I could use these neckboards without that board .
.
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Post by Casethecorvetteman on Jun 24, 2016 10:18:28 GMT -5
Yes the neckboards work fine without this board fitted, i have 2 of them in my Cine 9 at the moment, there was no change.
The older style main mother board does not have the connector for this board, so it is not fitted to my set for that reason. It was installed in my 909, which is a 2005 model.
I did ask some time ago on Curt's forum but didnt remember getting a response that had info in regards to what the board does.
It certainly isnt required though, i would have to swap out main mother boards to see if it does anything that can be seen. It is not related to the IRIS3, that mounts directly to the controller board in the tray and is much smaller than this board, this board mounts inside the tube housing area of the set.
There is 2 jumpers on it that make mension of split of no split, no idea what they would do.
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Post by dummyload on Jun 24, 2016 16:22:00 GMT -5
Mine comes out a barco909 split pack and it had the contrast modulation board in it to ,but never had the change to test it due to controller problem and I lost the v3.12 software that was in it.(cine software has probably no control over this board ?) Barclay is right about the possible function I think. |
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Post by Casethecorvetteman on Jun 24, 2016 19:49:14 GMT -5
As far as i know the contrast modulation board should still work in Cine 9 software if you turn on option 1, i dont have one to test.
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Post by Casethecorvetteman on Jun 24, 2016 19:50:53 GMT -5
Mine didnt have the contrast modulation, but did have the HDTV board fitted to the V board, i havent figured out what that does either so ive left it out.
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Post by hulio on Feb 12, 2017 5:07:19 GMT -5
I thought it was sorted out, but Keith just asked on the other forum about your board Case. I found out that this board is the ABL controller, meant to work with latest neckboards (with additional connector). They were needed in multiple projector configuration from sims and planetariums, to ensure the same level of black-level on all machines (network controlled). For single projector use, is beter to pull it out and use the standard ABL. In this spare parts list, we can see the board. BR909_spares_matrix__ref._TDE1320_03.pdf (10.38 KB) |
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Post by Casethecorvetteman on Feb 12, 2017 12:12:19 GMT -5
Yes mate it was all wired up to the neck boards and to the newer style mainboard in my 909, but my Cine 9 has the older style mainboard that doesnt have the connector for this board. Ive used the newer neck boards in the set without this board ( for obvious reasons, nowhere to plug it in ) as well as a combo of new and old neck boards, and all was fine, so its good that you posted that info to confirm what it actually does  |
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