Yes, with the power supply disconnected from the mobo, it pops.
alan
On 3/5/19 3:43 PM, Warner Losh wrote:
If you disconnect the power supply from the motherboard, disks, etc,
does it still pop? If so -> bad power supply. If not, reconnect one at
a time and see if it is load based (eg each of them connected alone
causes it). If it is purely load based, then it's a bad ps). If
there's one thing that causes it to pop, there's an issue there. If it
is the mobo, you might also try w/o the VR201 connected, since if
that's pulling too much power, it can cause a PS overload (though I've
never had this issue, I've read about it years ago).
Warner
On Tue, Mar 5, 2019 at 2:56 PM Alan Perry <ape...@snowmoose.com
<mailto:ape...@snowmoose.com>> wrote:
OK, got back to this ...
Plugged in the Rainbow 100. Flipped the power switch. No LEDs lit.
There is a white circuit breaker on the power supply. When I
switch on the power, it pops out. I switch off the power, reset
the breaker, switch on the power and it pops out again.
alan
On 3/1/19 2:32 PM, Warner Losh wrote:
Since you don't hear the gears grinding in the rx-50, that's a
failure fairly early on. The LEDs in the back of the case will
tell you something. There's a table for LED codes in the Rainbow
manuals somewhere. If NO LEDs are on, that tells you something
too (they all light up on application of power).
I've had my rainbow for 30 years, and haven't had to deal with
bad caps in the power supply, but I've also gone as long as a
decade with the Rainbow in a box... And now I have 4 of them
(2As and 2Bs)....
Warner
On Fri, Mar 1, 2019 at 3:13 PM Alan Perry <ape...@snowmoose.com
<mailto:ape...@snowmoose.com>> wrote:
I will look at that when I get back home after the weekend.
On Mar 1, 2019, at 2:01 PM, Warner Losh <i...@bsdimp.com
<mailto:i...@bsdimp.com>> wrote:
On Fri, Mar 1, 2019 at 2:56 PM Alan Perry via cctech
<cct...@classiccmp.org <mailto:cct...@classiccmp.org>> wrote:
Initially it booted and ran for a while until I switched
it off.
The last time it responded to the power switched,
components powered up and the FDD started operating.
Then suddenly everything stopped like the plug had been
pulled.
Now it does nothing (apparent) when it is switched on.
The rainbow has a number of LEDs in the back that it frobs
while booting... Do any of them light up?
Warner
alan
> On Mar 1, 2019, at 1:44 PM, dwight
<dkel...@hotmail.com <mailto:dkel...@hotmail.com>> wrote:
>
> Maybe I need a little clearification.
> When you turn the switches off, it boots?
> Dwight
>
>
> From: cctech <cctech-boun...@classiccmp.org
<mailto:cctech-boun...@classiccmp.org>> on behalf of
Alan Perry via cctech <cct...@classiccmp.org
<mailto:cct...@classiccmp.org>>
> Sent: Friday, March 1, 2019 1:35 PM
> To: Ethan Dicks
> Cc: General Discussion: On-Topic Posts
> Subject: Re: Rainbow 100 PSU capacitor list
>
>
>
> > On Mar 1, 2019, at 7:52 AM, Ethan Dicks
<ethan.di...@gmail.com <mailto:ethan.di...@gmail.com>>
wrote:
> >
> > On Wed, Feb 27, 2019 at 1:21 PM Alan Perry via cctech
> > <cct...@classiccmp.org
<mailto:cct...@classiccmp.org>> wrote:
> >> Hi,
> >>
> >> I think that I need to re-cap the power supply in a
Rainbow 100. Does
> >> anyone here know if anyone has put together a list
of capacitors used in
> >> the power supply that I can use to order parts?
> >
> > I don't have a list (I just got a pair of Rainbows
last month) but
> > given the era of manufacture, I'd be looking for
Rifa EMI filter caps
> > by the power inlet. I've had those fail in BA23
cabinets and in a
> > Commodore D9060 hard drive, and a TRS-80 Model 4.
>
> Thanks. When I first got the Rainbow, I asked here
about what to look for before powering it up and was
told about Rifa caps and what look/listen for.
>
> I eventually threw caution to the wind and just
powered it up and I ran it for 15-20 minutes. The PVA in
the monitor was really cloudy, so I didn’t use the
system anymore until I removed the PVA over Christmas. I
was testing everything after that and the system was
booting up when the power all switched off like it had
been unplugged.
>
> alan
>
>
> >
> > This is totally different than failing/bulging
electrolytics.
> >
> > -ethan
>
