Rainbow 100 PSU capacitor list

[Warner Losh]

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