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Post by gregstv on Mar 3, 2016 3:37:22 GMT -5
Hi Guys, I finally got myself a Barco 919. It had a few issues that I have sorted like bad coolant and a faulty astig module. I have replaced the astig module and that is working well. I removed the front tray to check the astig module is not running hot and it is quite cool. I than noticed that the focus module is very hot. Is this normal for these units? Thanks, Greg |
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Post by Casethecorvetteman on Mar 3, 2016 3:48:02 GMT -5
Was the fan working?
One of my sets runs the system board very hot.
Have you tried setting the focus and astig settings to midpoints and seeing if that has any effect?
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Post by gregstv on Mar 3, 2016 6:22:37 GMT -5
Was the fan working? One of my sets runs the system board very hot. Have you tried setting the focus and astig settings to midpoints and seeing if that has any effect? The fan comes on when it gets hot. Before I changed the astig board the fan would only come now and then. I will have a play over the weekend. The SR2 resistor was open circuit on the astig board. I have been doing some cold resistance checks and cant find anything wrong yet. I will keep looking.
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Post by dummyload on Mar 3, 2016 6:36:40 GMT -5
Congratulations with youre new toy. Mine gets hot to. There is also the differece in blow direction between barco max/cine9 and barco 9xx of one of the fans in the tray. @ Case you can make controller board heatsink cooler , early versions controller boards have I64 (lm7905) connected to -19v line (load on I64 = 0,5A) so only that one generates 7w heat , connecting it to -9v line saves about 5w of heat , see manual later version for details. R780822_04_Draft.compressed.pdf (715.62 KB). |
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Post by radiohead314 on Mar 3, 2016 7:17:20 GMT -5
There are also two versions of the focus module. One is longer and has a metal part coffering the heatsink until the fan. The older does not have that metal cover part. The tray does not even have the holes to fit it. Which one do you have?
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Post by Casethecorvetteman on Mar 3, 2016 7:41:43 GMT -5
There are also two versions of the focus module. One is longer and has a metal part coffering the heatsink until the fan. The older does not have that metal cover part. The tray does not even have the holes to fit it. Which one do you have? They all have the cover, it is slightly different for the older version and attaches direct to the frame with 2 screws. My 2001 model has it, i have one of each focus board here. |
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Post by Casethecorvetteman on Mar 3, 2016 7:43:35 GMT -5
Was the fan working? One of my sets runs the system board very hot. Have you tried setting the focus and astig settings to midpoints and seeing if that has any effect? The fan comes on when it gets hot. Before I changed the astig board the fan would only come now and then. I will have a play over the weekend. The SR2 resistor was open circuit on the astig board. I have been doing some cold resistance checks and cant find anything wrong yet. I will keep looking.
Front two fans should run all the time. Power is fed from the focus board. There is a jumper on there near the fan plug on the later focus board, but i dont know what it does. |
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Post by Casethecorvetteman on Mar 3, 2016 7:46:50 GMT -5
Congratulations with youre new toy. Mine gets hot to. There is also the differece in blow direction between barco max/cine9 and barco 9xx of one of the fans in the tray. @ Case you can make controller board heatsink cooler , early versions controller boards have I64 (lm7905) connected to -19v line (load on I64 = 0,5A) so only that one generates 7w heat , connecting it to -9v line saves about 5w of heat , see manual later version for details. . Correct indeed, not sure why they reversed that fan, but my sets have it different on both. thanks for that other info, might be worth a look and maybe starting another thread on the controller board? One of mine shuts off due to that heat, and the newer one has a minor geometry distortion on the left side of the raster, which i believe is an issue on the controller board. |
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Post by Casethecorvetteman on Mar 3, 2016 7:51:16 GMT -5
Here is a pic of that shroud for the shorter focus board:  |
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Post by gjaky on Mar 3, 2016 12:13:51 GMT -5
Also turn down "drive voltage" as low as you can.
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Post by Casethecorvetteman on Mar 3, 2016 17:55:39 GMT -5
Also turn down "drive voltage" as low as you can. Youll have to explain what you mean there Gábor |
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Post by radiohead314 on Mar 3, 2016 23:14:53 GMT -5
It is in the newer software to lower convergence drive. In 2.13 it is absent.
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Post by gregstv on Mar 4, 2016 1:02:19 GMT -5
Thanks Guys, No cover on the focus board. Just a black heat sync. Should be easy to bend one up. The jumper is on Fan not 12V. Is this the same as everyone else? The drive is on 34V.
Greg. |
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Post by gjaky on Mar 4, 2016 1:26:02 GMT -5
Thanks Guys, No cover on the focus board. Just a black heat sync. Should be easy to bend one up. The jumper is on Fan not 12V. Is this the same as everyone else? The drive is on 34V.
Greg. When there is no option for drive voltage I think it is set automatically, with higher the scanrate the more the dreive voltage you need. Here is a post that relates to this, although it was written mainly focusing on the NEC XG, but there is an overview too: repairalmostanything.com/thread/327/nec-xg-performance-enhancement-thread?page=1&scrollTo=6391 |
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Post by dummyload on Mar 4, 2016 2:42:27 GMT -5
If the fan direction at the focus board is out of the tray then there definitely must be a cover there.
Voltage is set automatic but as radiohead says there is a software version where you have some control to it.
@nice work gjaky ,I like your explanations .
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