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" <[EMAIL PROTECTED]>
To: "LisaList" <lisalist@mail.maclaunch.com>
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" <[EMAIL PROTECTED]>
To: "LisaList" <lisalist@mail.maclaunch.com>
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" <[EMAIL PROTECTED]>
To: "LisaList" <lisalist@mail.maclaunch.com>
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" <[EMAIL PROTECTED]>
To: "LisaList" <lisalist@mail.maclaunch.com>
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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