Re: Taking apart Lisa - cleaning

> I certainly understand about the necessity to replace all old
> capacitors. I have restored equipment much older than the Lisa in
> the past. This was something I was planning on doing very soon, not
> to mention keeping the Lisa from being used in the meantime. I was
> just making the statement that I believed that the previous problem
> had been fixed in the past, and that the power supply isn't missing
> any parts.
>
> On this note, does anyone think capacitors could be the problem
> with my Widget? I suppose this could be the case, although I am
> guessing it is something more complicated. Does anyone have a
> compiled list of capacitors needed to do a full recap of Lisa, or
> is that something that hasn't been documented? I may as well make
> a list for those interested in doing so in the future, if there
> isn't one yet.
>
> Also, can anyone direct me to a source for the missing feet pads
> that Philip told me about in his reply? I really don't like the
> Lisa rocking back and forth, and if they are similar to the pads
> used on the keyboard, I would presume there would be a source for
> them somewhere, as they were probably bought "off the shelf" rather
> than custom made for the Lisa project.
>
> -Chris
> ----- Original Message ----- From: "Jason Perkins"
> <quanda_computing_at_email.domain.hidden>
> To: "LisaList" <lisalist_at_email.domain.hidden>
> Sent: Wednesday, November 02, 2005 9:30 AM
> Subject: Re: Taking apart Lisa - cleaning
>
>
>
>> You can do the caps now while everything is still working, or
>> later after wong voltages have been going to the device for a
>> while. Which would you prefer?
>>
>> -J
>> ----- Original Message ----- From: "Chris Riedl"
>> <zap_at_email.domain.hidden>
>> To: "LisaList" <lisalist_at_email.domain.hidden>
>> Sent: Wednesday, November 02, 2005 4:31 AM
>> Subject: Re: Taking apart Lisa - cleaning
>>
>>
>>
>>> Actually, the Lisa appears to be just fine, other than the
>>> ghost Widget. I am guessing that something failed in the past and
>>> the power supply was repaired or replaced. I wouldn't expect
>>> that someone doing that job would go through the trouble of
>>> taking the entire machine apart to clean up the mess.
>>>
>>> -Chris
>>> ----- Original Message ----- From: "Dr. Helmut Post"
>>> <helmut_post_at_email.domain.hidden>
>>> To: "LisaList" <lisalist_at_email.domain.hidden>
>>> Sent: Wednesday, November 02, 2005 4:19 AM
>>> Subject: Re: Taking apart Lisa - cleaning
>>>
>>>
>>>
>>>> Hi,
>>>> I have replaced all old electrolytic caps and the power surge
>>>> caps in my
>>>> Lisa- no more problems- and the Voltages are more stable than
>>>> ever before.
>>>> I have even exchanged all electrolytic caps in the video
>>>> circuit- the
>>>> picture is now much better- the slight jitter is gone.
>>>> I'd recommend everyone to exchange all electrolytic caps inside
>>>> the PSU and
>>>> the Video circuit- it makes a big difference and protects the
>>>> Lisa for the
>>>> future.
>>>>
>>>>
>>>> ----- Original Message ----- From: "Chris Riedl"
>>>> <zap_at_email.domain.hidden>
>>>> To: "LisaList" <lisalist_at_email.domain.hidden>
>>>> Sent: Wednesday, November 02, 2005 9:37 AM
>>>> Subject: Re: Taking apart Lisa - cleaning
>>>>
>>>>
>>>>
>>>>> Well, that was certainly an interesting escapade.
>>>>> Apparently a power
>>>>> supply cap blew up sometime in the past, and there was crusted
>>>>> electrolyte
>>>>> all over the one side. Some cleaning of the chassis and case
>>>>> later, I
>>>>>
>>>> have
>>>>
>>>>> got the Lisa booting up. However, it just appears as if the
>>>>> Widget is not
>>>>> present to the system, as it only shows the floppy for
>>>>> startup. The
>>>>>
>>>> Widget
>>>>
>>>>> spins up and sounds normal, but I guess it isn't being seen by the
>>>>>
>>>> hardware.
>>>>
>>>>> Any suggestions or things to try to pinpoint this further?
>>>>>
>>>>
>>>> I'd recommend to turn the voice coil actuator manually during
>>>> the spin-up,
>>>> self test procedure of the Widget.
>>>> Sometimes it helps....
>>>>
>>>> Helmut
>>>>
>>>>
>>>>
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