1 Dec
2014
1 Dec
'14
1:19 p.m.
On 1 December 2014 at 06:16, tony duell <ard at p850ug1.demon.co.uk> wrote:
Thanks for the suggestions from Glen and Tony. I am away from home most of
the week, but I will take a look when I get home again at the end of the
week.
Regards
Rob
Not sure what
makes it an international model, although it does say
50-60Hz,
and it does not have a captive power cord, so
presumably it is an
international one. I will have to take a look inside, but I really don't
have any idea what I would need to do to convert it.
Nothing specific to the VT3xx
Normally SMPSUs that can be converted to run off 115V or 230V
mains run the chopper off about 350V DC. The mains input
rectifier circuit is configured to be a simple bridge rectifier
for 230V and a voltage doubler for 115V. The conversion is
nothing more than a link from the neutral side of the mains
to the centre tap of a pair of smoothing capacitors in series
(if you look at the circuit, you end up with 2 diodes that are
redundant, always reverse-biased, in the voltage doubler
circuit, but that is no problem).
So look for a link on the PSU board in this area. If you are
lucky it will either have 2 positions labelled '115V' and
'230V' (in the latter position it actually does nothing) or
will be marked 'fit for 115V' or something.
-tony