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Post by Decibel on Mar 20, 2019 10:32:34 GMT -5
Yes exactly
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Post by Decibel on Mar 20, 2019 9:21:12 GMT -5
Sorry but I don't understand: the date of the schematics that you mentioned as "after" is year 2000 (without manual modify). The date of the schematic that you mentioned as "older" (with manual modify) is year 2002.
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Post by Decibel on Mar 20, 2019 9:01:14 GMT -5
I found the old schematic sheet in the service. Where is the new one?
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Post by Decibel on Mar 20, 2019 8:15:40 GMT -5
There were a modification done on the schematics, the resistor and the capacitor are well listed, as R410 and C410 and as "Manual" instead of SMD. In previous revision, they were implemented in the PCB, then removed from the schematics. Older : After : It'spossible these compnents needed to be even closer of each other. So as as they are well listed in the partlist, that's well intended, and should be redone that way. Robin Can you upload the complete schematic in the section "Service Manuals" of this forum? Thank you
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Post by Decibel on Mar 20, 2019 6:08:44 GMT -5
That fried one here is SR2 ; R208 is the smaller green one. Ok. We tried with two different convergence boards. Same resistor smoked at Stefano's home and original convergence board. Today this SR2 smoked in my home with another board (older version, short pcb).
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Post by Decibel on Mar 20, 2019 5:53:31 GMT -5
It'spossible these compnents needed to be even closer of each other. So as as they are well listed in the partlist, that's well intended, and should be redone that way. Robin The second scheme is different also in many many other components. Many should be changed. I hope to restored that section despite the great difficulty in welding very small tracks. Then I inserted the drawer but after a few minutes the resistor R208 (edit: SR2) of the convergence board has smoke due to excessive heat. They was detached (itself!) from pcb. I measured it and it's good but obviously there's something wrong. Those few seconds when I saw the screen there were still the wavy lines.
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Post by Decibel on Mar 19, 2019 18:04:17 GMT -5
I want to clarify that the intervention that I would like to do now is not to solve the problem of wavy lines but to remedy an accident occurred to Stefano while he was working on the controller. In fact the resistors and the capacitor of which we are speaking have been inadvertently detached.
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Post by Decibel on Mar 19, 2019 15:14:24 GMT -5
Can you tell us exactly which controller part number and index is it ? R763125-15
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Post by Decibel on Mar 19, 2019 14:26:18 GMT -5
I've seen the list of components now. The R50 resistor is described as 390 ohm not SMD. In the controller owned by Stefano (but also in mine) the resistor R50 is replaced by 3 components. There are two resistors in series between the contacts of the R50. These two resistors form a kind of small roof at the apex of which there is a capacitor that connects to another nearby capacitor. Look at the photos I posted before. In your opinion, is it possible to simply weld the 390 ohm resistor in the place of R50 without replicating the three components I mentioned above?
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Post by Decibel on Mar 19, 2019 12:34:46 GMT -5
Now I can't read the documents but I'm afraid that the components that we seek are not listed.
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Post by Decibel on Mar 19, 2019 10:23:34 GMT -5
Well. The tray of 909 is here now. This is the situation: A resistor R208 (edit: SR2) in the convergence board is broken. In the controller (also in the unit that I own) there's a modify, perhaps performed by Barco. This modify is broken. Below I put some pictures from my controller. We must to know the value of all components because in the Stefano's controller all components are bad.
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Post by Decibel on Mar 16, 2019 10:08:22 GMT -5
You may want to do a test of all 5 of those line voltages on the controller in the convergence circuit. There is a mod for it, i reckon Hulio will know what it is, i have the info too but its on my PC and im on my phone at present. It would be very appreciated to report this change in the forum, I would like to check that my controller has it too. Even Dummyload is very expert but unfortunately he hasn't written for more than a year.
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Post by Decibel on Mar 10, 2019 15:32:04 GMT -5
I have three mounting for BG808 and other spare for it. I have also eproms with any Barco Software you want, including Cine 8.
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Post by Decibel on Mar 10, 2019 14:15:46 GMT -5
You can't, without trying another controller. Swap it with the one from the spare 909. From the pictures of your controller it seems that those trimpots lost their sealing (red varnish) and drift. Even with a very good oscilloscope and the service manual, is not an easy task to tweak them back. Try another controller. So that controller will be unusable forever?
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Post by Decibel on Mar 10, 2019 10:26:17 GMT -5
Curt said that's a issue of the controller. He has no doubts and he has a lot of experience. But I do not understand why if we detach the convergence's board the defect disappears.
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