The continuing story of a Rainbow 100 (Was: Rainbow 100 PSU capacitor list)

[Warner Losh]

On Tue, Mar 12, 2019 at 1:08 AM Alan Perry <aperry at snowmoose.com> wrote:

>
> As noted in the subject, continuing the story of the Rainbow 100 that I
> rescued last year.
>
> The replacement PSU arrived today and I installed it. It came up to the
> Main System Menu, but I had forgot to plug the RX50 cable into the
> controller board and the RX50 power cable. Though it prompted to press a
> key, it did not respond when a key was pressed.
>
> I powered down and plugged that stuff in. When I powered it back up, the
> display showed a keyboard error and did not display the Main System Menu as
> before. All of the keyboard LEDs lit, then the last one started blicking
> accompanied by a pattern of beeps. I should have checked the LEDs on the
> system unit, but I only did it when the "Main Board interrupt off" message
> was displayed and it corresponded to Message Number 2. If I disconnect the
> keyboard, the system just displays a message about the keyboard.
>
> I was going to take a more systematic approach to diagnosing the issue
> tomorrow. Since the system "just" worked last time I powered it up, I
> wasn't expecting things not to work ...
>
> Any suggestions on what to look at?
>

I'd check the following things:
(1) pull apart all the connections, especially for ones you've done
recently. Use a bright light and look for bent pins. Before pulling apart,
make sure it was seated properly (though often it's impossible).Also make
sure cards are fully seated, diagnostics can fail if they aren't.
(2) Double check all things are connected. The diagnostics are very picky.
(3) Be very careful. This sounds like some issues I've had. I seated the
RX-50 controller card improperly and bent a pin and it caused weird things
to fail. Even a little side to side motion can cause a problem, at least it
did for me.

Warner


> alan
>
> On 3/6/19 10:21 PM, Warner Losh wrote:
>
>
>
> On Wed, Mar 6, 2019 at 9:11 PM Alan Perry <aperry at snowmoose.com> wrote:
>
>>
>>
>> On 3/6/19 5:15 PM, Warner Losh wrote:
>>
>>
>>
>> On Wed, Mar 6, 2019 at 4:36 PM Alan Perry via cctech <
>> cctech at classiccmp.org> wrote:
>>
>>> There was a lot of related discussion to this, but my question was never
>>> answered. Now I seem to have found the answer myself.
>>>
>>> According to a post on VCF Forums, here is the list:
>>>
>>> 2x 3200uF @ 16V
>>> 1x 2200uF @ 35V
>>> 2x 820uF @ 250V
>>> 1x 560uF @ 20V
>>> 1x 330uF @ 20V
>>> 3x 47uF @ 16V
>>> 1x 10uF @ 35V
>>> 1x 2uF @ 25V
>>>
>>> I went ahead and ordered a (claimed) working PSU. Hope it actually works
>>>
>>
>> Cool. Has anybody tried to run an AT or ATX power supply with an adapter
>> for the Rainbow?
>>
>>
>> Do you have pinouts for the connectors on the power supply?
>>
>
>
> The Rainbow 100 Technical Manual (page 3-30) has the following table:
>
> Table 3-11 Power Supply Connector (J8) Signals
> Pin Signal Mnemonic Description
> 1 AC Voltage Okay ACOKH This signal indicates the presence or absence of
> valid ac power entering the power supply. When valid ac power is present,
> this signal will be high. When the ac power is lower than the required
> minimum input voltage, this signal will be low.
> 2 Voltage Bias VBIAS This signal is connected to the communications
> control register via a jumper on the system module. The jumper is installed
> only for manufacturing testing.
> 3 None This pin is missing to provide a key for the cable connector.
> 4 -12 V -12 V input
> 5,6 +12 V + 12 V input
> 7,8,9 +5 V +5 V input
> 10, II, 12, 13 Ground GND DC power return and signal ground
>
> Page 1-10 gives the following regulated values:
>
> +5.1 V ±6% over the current range of 2.5 A to 11.5A
> +12.1 V ±6% over the current range of 0.6 A to 6.7A
> -12 V ± 7% over the current range of 0.0 A to 0.15 A
>
> ~130W power draw max.
>
> Warner
>
> Warner
>>
>>
>>> alan
>>>
>>> On 2/27/19 10:22 AM, Alan Perry via cctech 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?
>>> >
>>> > alan
>>> >
>>>
>>>
>>
>