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Post by mastertech on Jul 15, 2015 10:29:33 GMT -5
Hmmm, our 909 service manual does not have any schematics on the PFC module. The modules section has the PFC sub board schematics but we appear to not have the main PFC board schematics. If anybody has them I could post them up. Unfortunately, without it I cannot assist. I would not condemn your SMPS just yet though. You are just bringing it back to life and now it is revealing where the problem probably originates at. That diode D400 is just a TVS diode for surge suppression. In fact, the service bulletin on the SMPS caps tells you the TVS will probably also go bad. Part is dirt cheap at Farnell. Someone find me a print on the PFC.  |
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Post by Decibel on Jul 15, 2015 10:52:44 GMT -5
I think that I have the schematics of PFC board. When back home will see in my notebook.
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Post by Decibel on Jul 15, 2015 12:07:22 GMT -5
R763145_PFC.zip (808.28 KB) Here the documents that I have about 909's PFC board.
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Post by mastertech on Jul 15, 2015 14:08:17 GMT -5
That looks good. Did you get a good look as to where the spark came from and have you investigated yet for any burnt parts or bad solder connections?
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Post by Decibel on Jul 15, 2015 14:15:13 GMT -5
Yes but I don't saw burnt parts or bad solder.
All components appear good.
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Post by mastertech on Jul 15, 2015 18:00:34 GMT -5
Then check all the fuses on the PFC and SMPS and try powering it up again. Also recheck the ++9v.
The flash could of been a fuse blowing.
But if you do find a blown fuse check back here first.
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Post by Decibel on Jul 16, 2015 1:55:57 GMT -5
Then check all the fuses on the PFC and SMPS and try powering it up again. Also recheck the ++9v. The flash could of been a fuse blowing. But if you do find a blown fuse check back here first. There was F101 in SMPS main board blown. Is a glass fuse T250mAl 250v I don't understand because the spark came from other place. I think that came from PFC sub board. |
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Post by Deleted on Jul 16, 2015 5:46:46 GMT -5
What I see the F101 is the connection to 300VM that comes from the PFC. It simple seems that something in the 9V was drawing to much current?
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Post by mastertech on Jul 16, 2015 9:40:26 GMT -5
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Post by Decibel on Jul 16, 2015 10:32:16 GMT -5
Perhaps I have that diode.
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Post by Decibel on Jul 16, 2015 10:37:07 GMT -5
J30 was always remove during tests
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Post by Decibel on Jul 16, 2015 10:38:50 GMT -5
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Post by Deleted on Jul 16, 2015 11:06:05 GMT -5
Ok that makes sense TVS D400 is a surge suppression this topic is very educative.  |
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Post by mastertech on Jul 16, 2015 16:10:02 GMT -5
J30 was always remove during tests This post bugs me a little. I told you how many posts ago to make sure there was a jumper on there. And since that post I had assumed that the jumper was on. |
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Post by Decibel on Jul 17, 2015 3:01:49 GMT -5
Ok next week I will have new diodes, tvs and Panasonic 560uF caps.
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