Rainbow 100 PSU capacitor list

[Alan Perry]

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 <aperry at snowmoose.com 
> <mailto:aperry at 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 <aperry at snowmoose.com
>>     <mailto:aperry at 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 <imp at bsdimp.com
>>         <mailto:imp at bsdimp.com>> wrote:
>>
>>>
>>>
>>>         On Fri, Mar 1, 2019 at 2:56 PM Alan Perry via cctech
>>>         <cctech at classiccmp.org <mailto:cctech at 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
>>>             <dkelvey at hotmail.com <mailto:dkelvey at hotmail.com>> wrote:
>>>             >
>>>             > Maybe I need a little clearification.
>>>             > When you turn the switches off, it boots?
>>>             > Dwight
>>>             >
>>>             >
>>>             > From: cctech <cctech-bounces at classiccmp.org
>>>             <mailto:cctech-bounces at classiccmp.org>> on behalf of
>>>             Alan Perry via cctech <cctech at classiccmp.org
>>>             <mailto:cctech at 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.dicks at gmail.com <mailto:ethan.dicks at gmail.com>>
>>>             wrote:
>>>             > >
>>>             > > On Wed, Feb 27, 2019 at 1:21 PM Alan Perry via cctech
>>>             > > <cctech at classiccmp.org
>>>             <mailto:cctech at 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
>>>             >
>>>
>