Received: by 10.66.72.73 with SMTP id b9mr2264556pav.9.1348471342882;
        Mon, 24 Sep 2012 00:22:22 -0700 (PDT)
Path: a8ni19731300pbd.1!nntp.google.com!border1.nntp.dca.giganews.com!border4.nntp.dca.giganews.com!border2.nntp.dca.giganews.com!nntp.giganews.com!nx01.iad01.newshosting.com!newshosting.com!newspump.sol.net!xlned.com!feeder1.xlned.com!goblin3!goblin.stu.neva.ru!itsinternet.net!volia.net!news2.volia.net!feed-A.news.volia.net!fu-berlin.de!diesel.cu.mi.it!not-for-mail
From: supervinx <ness...@libero.it>
Newsgroups: sci.electronics.repair
Subject: Re: [LONG] Another switching PSU question...
Date: Sat, 22 Sep 2012 23:52:57 +0000 (UTC)
Organization: C.U. srl News Server
Lines: 7
Message-ID: <k3lj0p$hnf$2@tdi.cu.mi.it>
References: <k3ksng$4ps$1@tdi.cu.mi.it>
	<t03s585uas723u8cuh3j9j2q5k59388lo5@4ax.com>
NNTP-Posting-Host: adsl-ull-141-13.50-151.net24.it
Mime-Version: 1.0
X-Trace: tdi.cu.mi.it 1348357977 18159 151.50.13.141 (22 Sep 2012 23:52:57 GMT)
X-Complaints-To: abuse@diesel.cu.mi.it
NNTP-Posting-Date: Sat, 22 Sep 2012 23:52:57 +0000 (UTC)
User-Agent: Pan/0.133 (House of Butterflies)
Bytes: 1220
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Well, I made some more measurements.
The IRFPE40 shows the following voltages:
VDS=312V (max. 800V)
VGS=0 (?????)

What's the IRFPE40 function ?
Looking at the PCB it seems that the 3844 supply voltage comes from it...