If anyone is replacing the capacitors in the PSU, would they be able
to document the process with photos and a descriptions. I would be
more than willing to host the instructions on my .Mac account.
P
On Nov 3, 2005, at 8:34 PM, Philip Lord wrote:
As far as I can tell, they are the same as the keyboard pads.
P
On Nov 3, 2005, at 4:28 PM, Chris Riedl wrote:
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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