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

[Alan Perry]

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?

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 
> <mailto: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 <mailto: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
>>         >
>>
>