The continuing story of a Rainbow 100 (Was: Rainbow 100 PSU capacitor list)
Alan Perry
aperry at snowmoose.com
Tue Mar 12 02:08:25 CDT 2019
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
>> >
>>
>
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