Hi Jose
Don't worry, the 110 and 220 volts are regulated down to 5 volts and 12 volts DC regardless of AC input voltage so the digital circuits (and analog circuits) will see the same voltage to run them regardless. Our major concern here is heat in the unit.
Bob
Corona/Riverside, CA
----- Original Message -----
From: José Sáez
To: xl7@yahoogroups.com
Sent: Sunday, January 09, 2005 5:11 PM
Subject: Re: [xl7] Re: 220 vs. 110 volts
I'm not sure if i would try that test again...
A low voltage has less probability to fry your MP7 circuits since the resistance diminishes as voltage goes down. However these are digital devices. A low voltage could change the difference between 0 (no current) and 1 (current). Running digital devices at low voltages has some funny results if you try it with a Casio SK-5; it adds distortion to the sound since some bits pass and some don't.
But i wouldn't risk to do that with a machine whose O.S. is written in flash memory... What if you corrupt the data ? You could end with a machine with a flat EEG...
Jose
I'm NOT going to fix your computer.
........
----- Original Message -----
From: groakes2000
To: xl7@yahoogroups.com
Sent: Sunday, January 09, 2005 7:04 PM
Subject: [xl7] Re: 220 vs. 110 volts
Thanks Guys -
I borrowed a stepdown of my father-in-law. It has a dial on it
whereby you can adjust the voltage down as low as 80v. Just for a
test, I tried running the MP7 at 80v to see what would happen. It
took a few seconds to power on, but other than that it appeared that
everything ran normally.....
cheers
Greg
--- In xl7@yahoogroups.com, "Bob S." <tttsystems@e...> wrote:
> Great test and work Jose...thanks for the affirmation.....
>
> Bob
> Corona/Riverside, CA
> ----- Original Message -----
> From: José Sáez
> To: xl7@yahoogroups.com
> Sent: Sunday, January 09, 2005 8:45 AM
> Subject: Re: [xl7] Re: 220 vs. 110 volts
>
>
> All right, i measured temperatures of the surface of the unit
day and night after 1 hour of operation at 220 and 110V (i waited
for the unit to cool down before taking the next measure), and this
are the results:
>
> 220V ---> average Tº: 36º C (96.8 F)
>
> 110V ---> average Tº: 29.6º C (85.28 F)
>
> The average environment Tº has been around 80-90 Fº these days.
>
> In conclusion: even when the manual says that the XL-7 unit can
be run at 220V, it is advisable to use a stepdown voltage converter
in order to reduce heat and add to stability and extend it's working
life.
>
> I haven't measured the Tº inside the case, but i suppose it
could be even higher. Don't want to run the risk...
>
> Jose
>
> ----- Original Message -----
> From: gonzinigonz
> To: xl7@yahoogroups.com
> Sent: Saturday, January 08, 2005 11:08 AM
> Subject: [xl7] Re: 220 vs. 110 volts
>
>
>
> Sounds like another switchmode PSU failing..
> This would explain your errors that you've been having. It
doesnt
> happen without power.
> Its one of the most common faults with any electronic /
electrical
> gadget, lack of correct supply voltages ie failed PSU's
> I have an BSS FDS366 Omnidrive here to repair. Guess what
failed
> swithmode! Sometimes it will start up and be fine. Other times
you
> have to repeatedly turn it on/off to get it to fire up.
> This fault is with the start up circuitry..
> Anyway id start looking for a replacement PSU for it, there
has been
> talk of this on the list..
> Im sure another type of switchmode could be fitted,
voltage's /
> size / shape permitting. I dont think these command stations
are to
> strange in the PSU department
> I run my XL-7 via a 110v transformer now, the PSU gets far to
hot for
> my liking on 240v ;o)
> Regards
> Gonz
>
>
>
>
> #--- In xl7@yahoogroups.com, "groakes2000" <groakes@i...>
wrote:
> >
> > On another note, my continuing problem with Fatal Errors has
been
> > somewhat ameliorated by using a stepdown transformer running
at
> > 110v. Time between failures now stretches out to over 5
hours....
> > Which reinforces the thought that maybe my problem is
related to a
> > heat related failure of a component whose tolerances are
> > rather "fine"....
> >
> > cheers
> > Greg
>
>
>
>
>
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Re: [xl7] Re: 220 vs. 110 volts
2005-01-10 by Bob S.