Re: Dead PET 2001

Re: Dead PET 2001

From: Philip Lord <>
Date: Mon, 10 Aug 2009 15:14:51 +0900
Message-id: <>
Thanks William,
I did as you described.
I removed the red wires from the capacitor and re-measured the  
voltages on either side of the two diodes.
As before I get just over 8VAC on the anode side, but now I get  just  
over 8VDC on the cathode side.

I also tested the large capacitor using the ohm meter on my digital  
multimeter. It starts at Zero ohms and slowly rises.

I apologies for my lack of electronic knowledge, and once again ask  
what I should try next? Hopefully we are narrowing down the problem.

Cheers again

On Aug 10, 2009, at 1:07 PM, William Levak wrote:

> On Sun, 9 Aug 2009, Philip Lord wrote:
>> oops...Please excuse my bad typing...what I mean to say was:
>> Yes, I admit I was checking the voltage on the inside of the diodes  
>> with my multimeter (digital) set to AC. I just rechecked with it  
>> set to DC and the reading is still in the millivolt range.
>> If the diodes are indeed the culprit, I find it strange that both  
>> diodes would be open?
>> As for the J8 connecter, it basically looks new, no dirt, or  
>> burning at all.
> You said the fuse blew several times.  That would be enough to blow  
> the diodes.  Disconnect the red wires from the capacitor, and check  
> the voltages again.  Also check the capacitor for shorts.  If you  
> don't have a capacitor tester, you can use an ohm meter.  The  
> resistance should start at zero and build up.
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Received on 2009-08-10 08:29:03

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