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Chris

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Reply with quote  #1 
Well I guess that it was bound to happen someday. I bought this from Rick in Nov 2007. I did the fan mod, PVR mod and S2 upgrade. It has been a good unit. I now have the b-07 freeze. I pulled it back to life once but that was it. I removed  the PS and did a quick visual. Everything looks fine. I will meter it tomorrow. I suspect I will be capping it.
iggy57

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Reply with quote  #2 
Had to the very same thing just two days ago. When I pulled the power supply it didn,t look like there was any thing wrong with it. All caps looked just as good as the ones I put in. Cost me 24.00 bucks and replaced them all. Reinstalled the supply and plugged her in . Fired up and back in business. Don,t let the look of the caps fool you !!

Iggy57


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bill68

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Reply with quote  #3 
I was lucky.  Came back last week from a 14 day trip but before I left I disconnected all equipment.  When I came back and re-plugged everything back in; the 9200 kept showing the b_07 and rebooting.  Turned off the power, then back on.  Everything worked!

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Chris

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Reply with quote  #4 
I replaced all the caps with a few upgrades. The two 16v 470uf caps were replaced with
35v 470's . The two 25v 330 uf 's replaced with 35v 330's. The 400v 100uf 85 degree replaced with a 400v 100uf 105 degree high temp. All the others remain the same. 15 caps replaced in all. I started one at a time with reboots after each replacement in an attempt to isolate the culprit. After about five attempts at this I gave up,  capped the whole thing and gave it a shot. It booted right up.

Closely inspected the original caps after removal and not one showed any sign of leakage or swelling.

http://i782.photobucket.com/albums/yy106/parrotte/IMAG0001.jpg

http://i782.photobucket.com/albums/yy106/parrotte/IMAG0003.jpg

http://i782.photobucket.com/albums/yy106/parrotte/IMAG0004.jpg


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iggy57

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Reply with quote  #5 
Glad to hear and see you got it back .
Great write up and photos .
Thanks for the feed back I,m sure this will help others.


Iggy57


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ind224

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Reply with quote  #6 
A cheap Fluke 12 meter will check capacitance and does the discharge for ya
I'd probably re do all of them myself but knowing which one(s) has always been a need for me. 

boomer_106

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Reply with quote  #7 

Quote:
Originally Posted by ind224
A cheap Fluke 12 meter will check capacitance and does the discharge for ya
I'd probably re do all of them myself but knowing which one(s) has always been a need for me. 


Define cheap?

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tanka

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Reply with quote  #8 

good job chirs

foxtail

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Reply with quote  #9 

Don't think I've seen a cheap Fluke meter anyplace. Great job on the fix! Used to repair the lottery and game machines here in Cdn and the power supply were the same kind on problem. And like you...beefed up the caps abit more. Still have two solider stations, one self contained unit and one that runs with a compressor. Work great.

the_man_one

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Reply with quote  #10 

any cheep analog ($15 usd range) meter will show it on ohms setting, the needle will steadily rise then drop off as the cap charges & discharges.... digital will do it depending on the sensitivity

boomer_106

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Reply with quote  #11 
Quote:
Originally Posted by the_man_one

any cheep analog ($15 usd range) meter will show it on ohms setting, the needle will steadily rise then drop off as the cap charges & discharges.... digital will do it depending on the sensitivity


So you are talking about measuring it in circuit?  What response would you expect from a faulty cap?

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boomer_106

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Reply with quote  #12 
I recapped mine today and I'm back in business. I used Nichicon caps made in Japan. Hopefully they are higher quality than those originals. This wasn't a real difficult job.

Thanks for all the advice I was given here.

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yankee495

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Reply with quote  #13 
A cheap simple way to test a Cap:

Touch it to a 9 volt battery.  Then short it and watch for a small spark.  Used to do it for fun when I was a kid but it will tell you if they charge up...

Very small caps won't hold enough charge to spark.


the_man_one

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Reply with quote  #14 

usually a bad cap will not charge & discharge

boomer_106

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Reply with quote  #15 
Quote:
Originally Posted by the_man_one

any cheep analog ($15 usd range) meter will show it on ohms setting, the needle will steadily rise then drop off as the cap charges & discharges.... digital will do it depending on the sensitivity


I've always read(I know they say you can't believe everything you read) that you shouldn't test for resistance(ohms) while there is power in a circuit?

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