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Post by Decibel on Feb 9, 2017 10:41:56 GMT -5
the projector worked well for many hours. I think at least 10 films. I do not think that the problem can be attributed to the hole because it is away from the board.
Yes I would to repair it. I will send the board to you again. But I would to seek a spare part. If someone have it, please, let me know.
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Post by dummyload on Feb 9, 2017 11:47:23 GMT -5
Afcourse it's possible it has nothing to do with drilling the hole but there must be something going on it now has blown two times and 10 movies is not a day of continues running (very short time).
I can have made an error to but that would not explane the first blow and after repair I have checked the board good with scoop in operation with cooling and warming and found no anomalies .
Also this is not a problem board never heard of any.
Without finding the cause it will keep recurring and I want to avoid that.
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Post by Casethecorvetteman on Feb 10, 2017 9:42:30 GMT -5
What does that part that burned up actually do on that board? What is its job?
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Post by dummyload on Feb 10, 2017 10:13:55 GMT -5
It's an MC34063A 1,5A step-up/down/inverting switching regulator chip making the suply for the horz. fan ,input voltage is 30v , max out is 12v
for the fan ,temp feeling 10k ntc for regulation is on the horz board the Other chip lm393 makes the fan sens signal for control board (=fan fail or o.k.)
First time both chips and a few zener and signal diodes and transistor were fried , so that was most of the circuit.
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Post by Decibel on Feb 11, 2017 10:53:59 GMT -5
When the interface worked I tried to mount it on a 909 projector. I noticed that the middle fan not spin.
I know that in the 909's projectors the middle fan spin always.
So I guess that the interface into my Cinemax is not compatible with the 909's projectors.
Is possible to mod the interface to make it compatible with the 909's projectors?
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Post by Decibel on Feb 11, 2017 11:03:29 GMT -5
The differences between interfaces   |
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Post by Casethecorvetteman on Feb 11, 2017 23:10:10 GMT -5
When the interface worked I tried to mount it on a 909 projector. I noticed that the middle fan not spin. I know that in the 909's projectors the middle fan spin always. So I guess that the interface into my Cinemax is not compatible with the 909's projectors. Is possible to mod the interface to make it compatible with the 909's projectors? Need to install Cine 9 firmware. |
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Post by Casethecorvetteman on Feb 11, 2017 23:10:50 GMT -5
It's an MC34063A 1,5A step-up/down/inverting switching regulator chip making the suply for the horz. fan ,input voltage is 30v , max out is 12v for the fan ,temp feeling 10k ntc for regulation is on the horz board the Other chip lm393 makes the fan sens signal for control board (=fan fail or o.k.) First time both chips and a few zener and signal diodes and transistor were fried , so that was most of the circuit. Has the fan been swapped for another? |
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Post by dummyload on Feb 12, 2017 8:50:29 GMT -5
Decibel ,in my barco 919 the fan does not start at power up it does the same as in my cinemax and I haven't seen any difference about this circuit between the two ,be careful with room temperature and if projector has just run previously. So the horz fan did not start in the barco 909 of your friend ,did you get a fan fail message ? have you wait a few minutes ? So the horz. fan starts direct in the 909 and the same board put in your cinemax does not ? As far as I know there are two version of this board like in your photo ,newer version has extra connectors installed so it can be used in the tray but these connections are useless for use with the horz. fan. And have you just used your friends board for test are did you use it for a longer time ? @case, I also suspect the horz. fan but I have never seen a fan shortning it's supply. This board (horz. fan) is not controlled by software,it is just a voltage supply regulated with an ntc resistor. (correct me if am wrong)
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Post by Casethecorvetteman on Feb 12, 2017 12:07:22 GMT -5
When used in the front i believe it requires software from a Cine 9 to operate as intended, but the rear board without the extra connectors is also fitted to my 909, so the rear probably doesnt need anything.
The fact my 909 has the board in the rear say to me they probably all did.
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Post by Decibel on Feb 12, 2017 13:27:54 GMT -5
I was convinced that in the 909's projectors the "horizontal fan" always spin at power on. I think I read somewhere that this fan not spin at power on only in cine9/cinemax.
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Post by Casethecorvetteman on Feb 12, 2017 19:29:38 GMT -5
No, it shouldnt spin until a certain temperature is reached.
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Post by gregstv on Feb 12, 2017 20:45:39 GMT -5
There is a temp switch on the horn board. I have seen these crack.
There is also one on the power supply sub board.
When you turn the projector on the outside fans should start with around 6.8V on them.
This voltage increases as the temp rises. Once it gets to around 8.2V the horz fan starts. This happens on the 909 and the 919.
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Post by Decibel on Feb 13, 2017 4:56:09 GMT -5
No, it shouldnt spin until a certain temperature is reached. What is the position of the jumper in 909's? |
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Post by Casethecorvetteman on Feb 13, 2017 6:20:46 GMT -5
What jumper?
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