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Post by robin36mac on Mar 24, 2019 4:30:57 GMT -5
I have the "hiss" sound too on my 909, the SMPS is doing it. My spare one don't. Some does, some don't ; but nothing to worry about. During stand by? Yes, when it's turned on, it's noisy enough so we have no idea  |
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Post by Casethecorvetteman on Mar 24, 2019 4:50:13 GMT -5
I forgot to mention that nothing comes out of the tubes now. I don't have the menu on the screen. Press the text button on the remote, youve turned the OSD off. |
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Post by Casethecorvetteman on Mar 24, 2019 4:51:22 GMT -5
Yes, when it's turned on, it's noisy enough so we have no idea Mine does it too, but its barely audible, i thought it was the remote backlight actually, but ive never tried to track it down. |
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Post by Decibel on Mar 24, 2019 6:16:48 GMT -5
I forgot to mention that nothing comes out of the tubes now. I don't have the menu on the screen. Press the text button on the remote, youve turned the OSD off. However the hiss certainly coming from convergence/controller tray because I want to remember that I operating with my Cinemax. With original tray (my controller and my other boards) have no hiss. When insert the tray of Stefano the hiss is present. |
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Post by hulio on Mar 24, 2019 8:23:22 GMT -5
Domenico, are you sure is not one of the front fans that is generating the noise ? Try to block the fans for a few seconds (or disconnect them from the focus board). It should take some 15 seconds before automatic shutdown, time enough to hear the difference.
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Post by Decibel on Mar 24, 2019 8:25:59 GMT -5
Domenico, are you sure is not one of the front fans that is generating the noise ? Try to block the fans for a few seconds (or disconnect them from the focus board). It should take some 15 seconds before automatic shutdown, time enough to hear the difference. Hiss is heard when the projector is in standby. So with the fans stopped. |
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Post by hulio on Mar 24, 2019 8:35:44 GMT -5
Ok, I missed that. Very strange indeed, noise while in standby from SMPS or PFC is common, but from one of the front boards.....
You'll find the noisy board only swapping one by one, I suppose.
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Post by dummyload on Mar 24, 2019 11:50:42 GMT -5
In stand by only the +9v for the controller is on ,this voltage is used for +5vp core controller (processor + extra) and +3.3v ic3 convergence
generation , remote decoding + exra that's all , did it do that before you put electrolyt caps on to ? If no maybe polarity wrong on one of those caps ? (the cap would come very hot and then make a hissing sound)
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Post by Decibel on Mar 24, 2019 12:29:50 GMT -5
In stand by only the +9v for the controller is on ,this voltage is used for +5vp core controller (processor + extra) and +3.3v ic3 convergence generation , remote decoding + exra that's all , did it do that before you put electrolyt caps on to ? If no maybe polarity wrong on one of those caps ? (the cap would come very hot and then make a hissing sound) Stefano, the owner of projector, say that the hiss there was also before replacing caps. |
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Post by Decibel on Mar 24, 2019 16:04:59 GMT -5
I hope that fix the issue of wavy lines. I've replaced two capacitors, add other three like my controller. Remain a strange problem of remote and built in control. Remote not work Built in mantain pairing for a few seconds, then stop work.     |
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Post by mastertech on Mar 24, 2019 16:48:10 GMT -5
Can you be more specific as to which capacitors? You can not leave it at this response.
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Post by Decibel on Mar 24, 2019 16:50:49 GMT -5
Can you be more specific as to which capacitors? You can not leave it at this response. Obviously tomorrow I will explain all with pictures. |
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Post by mastertech on Mar 24, 2019 16:54:32 GMT -5
Can you be more specific as to which capacitors? You can not leave it at this response. Obviously tomorrow I will explain all with pictures. Great. Thanks. |
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Post by Decibel on Mar 25, 2019 2:56:38 GMT -5
Can you be more specific as to which capacitors? You can not leave it at this response. Substantially I've replicated the modify that dummyload suggest in this thread and that he did at my controller few years ago. I've inserted two caps (100uf) in back of the board. One cap (C121 1uf) was absent and I've inserted it. Finally I've replaced two electrolytic smd caps (C223 and C253 both 47uf) with two standard ones. Now we must to solve the problem of remote and built in control. The first never work, the second bring pairing for only few seconds then forgot it.   |
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Post by whiterabb1t on Mar 26, 2019 18:08:41 GMT -5
Hi guys! first of all, I would like to thank everyone for the support you gave me, and I would like to ask if have any idea about the remote control... thanks
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