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Barco mods
Dec 26, 2016 17:08:03 GMT -5
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Post by gregstv on Dec 26, 2016 17:08:03 GMT -5
I thought I would start a new thread on Barco mods. Leave the screen shot thread for screen shots.
So far my changes have been about reducing noise. All these changes have worked well together.
I have been modding the port 3 RGB circuit with great picture results. But something is not quite right when I look at the 1:1.
My next change will be to bypass the switching circuit and run the output from the moome straight into the x2 op-amp on the switcher board. Hi
If anyone is interested I repaired a controller a few weeks ago. The caps on the board had ESR readings of 80 ohms and up. They were not measerable once removed.
It maybe worth while changing the caps if you have high hour board.
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Post by mastertech on Dec 26, 2016 17:47:50 GMT -5
80 ohms! Wow, I'm shocked. I had hoped Barco had used better caps then other manufacturers.
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Barco mods
Dec 26, 2016 18:50:12 GMT -5
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Post by gregstv on Dec 26, 2016 18:50:12 GMT -5
They are the worst I have seen on Barco boards. The board has a lot of hours on it. It's now up and running again.
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Post by mastertech on Dec 26, 2016 19:32:01 GMT -5
Was that a 909 controller?
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Barco mods
Dec 26, 2016 23:50:41 GMT -5
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Post by gregstv on Dec 26, 2016 23:50:41 GMT -5
I think it was. I picked it cheap not working. It came from Curt as a parts board. I decided to try and repair it before using it for parts.
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Post by gjaky on Dec 27, 2016 2:06:52 GMT -5
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Post by gregstv on Dec 27, 2016 2:46:19 GMT -5
Hi, It would be fun to try it. Do you have any blank boards? I would have most of the parts. Thanks, Greg. |
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Post by Casethecorvetteman on Dec 27, 2016 6:26:03 GMT -5
I think it was. I picked it cheap not working. It came from Curt as a parts board. I decided to try and repair it before using it for parts. Goes to show the level of talent there then doesnt it... Funny he says they cant be fixed, and here comes Greg to do just that  |
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Post by gregstv on Dec 27, 2016 7:27:10 GMT -5
You really need a good microscope to fix some of these boards. Not many people have invested in one. I use mine all the time.
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Post by gjaky on Dec 27, 2016 11:41:50 GMT -5
Hi, It would be fun to try it. Do you have any blank boards? I would have most of the parts. Thanks, Greg. I have one last set blank PCBs from the prototype run. That means slight modification needs to be done to the PCB to get it working right, also the gamma circuit is somewhat problematic (so better to omit from that board). I basically could give those boards away for the cost of shipping... |
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Post by gregstv on Dec 28, 2016 18:44:40 GMT -5
MOOME internal, ultra fast op-amps on switcher and driver. peaking turned off blue defocused. Still needs some fine tuning that I will get back to after the 1292 is done. Very happy with the picture. I added screen shots in the screen shot thread of this combo.   |
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Post by radiohead314 on Dec 29, 2016 7:52:43 GMT -5
MOOME internal, ultra fast op-amps on switcher and driver. peaking turned off blue defocused. Still needs some fine tuning that I will get back to after the 1292 is done. Very happy with the picture. I added screen shots in the screen shot thread of this combo. He I do not know if it is just me but I can not see your pictures. Did you make them public? Thanks for the great work I am following with interest! Seems I can download them. Something with the certificate of the side not being trusted??? |
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Post by mastertech on Dec 29, 2016 11:48:44 GMT -5
I can see them fine here.
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Barco mods
Dec 29, 2016 15:00:41 GMT -5
via mobile
Post by gregstv on Dec 29, 2016 15:00:41 GMT -5
Hi,
Not sure on which pictures you can't see.
There are 2 test patterns on my last post here. Or is there a problem with the ones in the screen shot thread?
Thanks,
Greg.
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Post by Casethecorvetteman on Dec 30, 2016 7:40:20 GMT -5
I can see them fine here. Yeah theyre on here at my end too. It could be that the browser doesnt like postimg.cc today at your end Tjeerd, ive had that same issue here before. |
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