justin
Junior Member
Posts: 60 
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Post by justin on Dec 16, 2016 6:14:09 GMT -5
hello all, while trying to work out why my pc won't connect to any of my projectors via the serial port, i had the 909 and cine 9 trays side by side for a looksee. i have attached some photos of two separate findings. i figured if it wasnt already identified that it may well be worth documenting. i also would like to become more of a hardware guy (currently more of a software guy) and replace capacitors on all my boards one day. on the 909 controller i found this modification to the factory board (not sure what this is?):  ^ the 909's i have were maintained for some time by a barco technician(s). this modification is not present on my cine 9 controller. on the cine 9 controller i found these two modifications to the factory board (yellow wire and two resistors):  ^ the cine 9 was poorly maintained. it's got 3000 hours on it. looks like its got all original parts fitted. these two modifications are not present on my 909 controllers. are the modifications to the cine 9 controller for the SEMU board i have?  regards, justin. |
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Post by hulio on Dec 16, 2016 7:08:08 GMT -5
I've seen those hand-made mods on almost all controllers, with exception of that yellow wire going to the big chip.
Depending on the PCB nr. (R763125 or R7631255), some of the controllers have been modded on both sides.
The mini-board above your Cine 9 controller is not the SEMU but the IRIS cam board.
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Post by dummyload on Dec 16, 2016 7:24:30 GMT -5
There are a lot of different pcb revision boards the mods are done by barco.
First photo is a fragile one (two resistors added with a cap on them) never put any force on it ,if the resistors are smd types they crack easily without being visible I have already seen three boards with this problem ,the result is that your convergence board will start smoking ,the disconection of the resistors cause a serious dc shift and then being amplified by the convergence board. Even on the highest revision (I know of) where the mod in photo two is emplemented and a few other improvements The mod on photo one is still there but instead of smd resistors they use regular 1/8w resistors (they can take more mecanical stres)
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justin
Junior Member
Posts: 60
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Post by justin on Dec 16, 2016 7:27:50 GMT -5
okay. not really worth documenting at all! there has been no modifications to any of my spare 909 controllers under side of the board that i can see.
these modifications must have been done by barco in house? or by the field service technicians?
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justin
Junior Member
Posts: 60
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Post by justin on Dec 16, 2016 7:31:42 GMT -5
ah, this must be why theyre held in place by the silicon. you've all mentioned things that can be very easily over looked when trouble shooting. i couldnt for the life of me find that! there is so much knowledge here amongst all members...! and all at a hobbyist level too. i just took a photo of the boards at the same distance. you are right, the cine 9 controller has them yellow parts that are not on the 909 controller.  ^ 909 controller  ^ cine 9 controller out of these two boards, which is the higher revision board? what would be considered a better board? 909 or cine 9? the cine 9 was made in 2003. the 909 was made in 2007. but, the 909 was in service up until about 2012? |
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Post by hulio on Dec 16, 2016 10:51:35 GMT -5
The one from your 909 is obviously the newer revision, as you can see from the part nr. stickers. Cine 9's controller is R763125 and BR909's one is R7631255. It has a few improvements, one of them being that the big heat sink gets a lot less hot.
Of course, which one of them is in beter shape, is another story. It depends on the run hours too.
To answer your early question: some of the mods were applied at the factory, others by the field engineers. A lot of service bulletins were publicated after the production of the boards.
One of my controllers is new in box (newer revision, zero hours run time) and is already modded with those resistors and cap.
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Post by Casethecorvetteman on Dec 17, 2016 2:17:27 GMT -5
Ive got one of each controller too, the later version gets no where near as hot because the -5v 7809 reg is fed by the -9v supply, where as on the earlier versions that 7809 reg is fed by a -19v supply. Why they fed a 7809 reg with -19v when -9v was available i just dont know...
GregsTV has had one of my controllers down with him for a while to fix a couple issues, it was in pretty bad physical shape when i bought the set, caps had lifted tracks near the heatsink, and im not sure how that happened. Greg is the doctor though, his work is exceptional as is his skill, so ill be looking foward to seeing how nice he got it looking while he had it there!!
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