7 Apr
2002
7 Apr
'02
10:27 a.m.
Has anyone ever repaired a Lisa 2 with the following symptoms: A
distorted video image on the upper 1/3 of the screen? I'm the high
bidder on a Lisa 2 on ebay
url:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2013387255&r=0&a…
If you look at the screen shots, the video screen is distorted very
similar to what my compact macs do with cold solder joints on the analog
board. I figure that it's either a similar problem, dirty contacts or
bad caps on the board. Just wondering if anyone has seen similar
symptoms. I think I can get a Lisa video board from a friend in DFW who
has a cache of Lisa's in storage. The guy's Apple collection is
awesome. He has several of absolutely every product Apple ever made
including a lot of prototype stuff that was never publicly released.
I usually don't attempt board level repair, but for a Lisa, I'll make an
exception. I thought Tony might have done one before. Have you ever
seen this one before Tony?
I think a Lisa would fit in perfectly with my NeXT's, Sun's, Indy and
BeBox.
Thanks,
James
You mean you're supposed to read the manual first?
7 Apr
7 Apr
10:48 a.m.
Has anyone ever repaired a Lisa 2 with the following
symptoms: A
distorted video image on the upper 1/3 of the screen? I'm the high
bidder on a Lisa 2 on ebay
The first thing to do would be to pop the top off of the Lisa
and check the 4-5 video adjustment dials along the top of the video
board, as well as the adjustment pot on the PSU. To me it definately
looks like at the very least the size/position/sync adjustments are
out of whack. If you get this Lisa, let me know and as soon as I get
the two CD's back from a local guy I've loaned them to, I'll make you
copies of them. They have all kinds of PDF's, disk images, and other
Lisa info on them.
BTW James, what version of Irix are you running on your Indigo2?
Jeff
--
Home of the TRS-80 Model 2000 FAQ File
http://www.cchaven.com
http://www.geocities.com/siliconvalley/lakes/6757
11:31 a.m.
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11:55 a.m.
The first
thing to do would be to pop the top off of the Lisa
and check the 4-5 video adjustment dials along the top of the video
board, as well as the adjustment pot on the PSU. To me it definately
Please don't!. If you have a real fault (and this sounds like one), it
will not be cured by making adjustments. Once you've twiddled everything
you will still have to cure the real fault and then re-align everything.
The only times you should adjust presets are (a) after some other person
has been fiddling about and (b) after replacing components in the
relevant part of the circuit. And to twiddle PSU presets without knowing
just what you are doing is a good way to wipe out the entire set of chips
in the machine.
12:10 p.m.
I downloaded and printed the Sun Remarketing Repair manual for the Lisa
as well as a parts manual with exploded views. Actually, I did this
three years ago when a friend was going to give me a non-functioning
Lisa, but he changed his mind.
If I get it, I'll check it out and probably will need to bug you about
it a little.
Thanks,
James
Jeff Hellige wrote:
The adjustment pot on the PSU I was referring to is part of the
video adjustment. It's reached from the rear of the machine through a
small hole in the back panel. Changing it's value is actually part of
the video alignment procedure after replacing the video board or
adding the XL screenkit modification. The pots on the video board
itself may also drift and need to be readjusted. This is easily done
by 'eyeballing' the video output as you would with the vertical and
horizontal sync adjustments on another monitor or TV. I once had to
open up a early Panasonic multisync monitor and do this. Everyone else
thought the monitor was bad due to it being totally out of sync.
Jeff
The first thing to do would be to pop the top off
of the Lisa
and check the 4-5 video adjustment dials along
the top of the video
board, as well as the adjustment pot on the PSU. To me it definately
Please don't!. If you have a real fault (and this sounds like one), it
will not be cured by making adjustments. Once you've twiddled everything
you will still have to cure the real fault and then re-align everything.
The only times you should adjust presets are (a) after some other person
has been fiddling about and (b) after replacing components in the
relevant part of the circuit. And to twiddle PSU presets without knowing
just what you are doing is a good way to wipe out the entire set of
chips
in the machine.
12:19 p.m.
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11:44 a.m.
I'd appreciate that very much.
Thanks!
Jeff Hellige wrote:
Has anyone
ever repaired a Lisa 2 with the following symptoms: A
distorted video image on the upper 1/3 of the screen? I'm the high
bidder on a Lisa 2 on ebay
The first thing to do would be to pop the top off of the Lisa and
check the 4-5 video adjustment dials along the top of the video board,
as well as the adjustment pot on the PSU. To me it definately looks
like at the very least the size/position/sync adjustments are out of
whack. If you get this Lisa, let me know and as soon as I get the two
CD's back from a local guy I've loaned them to, I'll make you copies
of them. They have all kinds of PDF's, disk images, and other Lisa
info on them.
BTW James, what version of Irix are you running on your Indigo2?
Jeff 
3:31 a.m.
As a result of my latest GEM searches, apparently it was also ported to the
Lisa. Check out Tim Olmsteads GEM page at Gene Buckles' retroarchive.
A GUI before Mac. Delicious.
Lawrence
I'd appreciate that very much.
Thanks!
Jeff Hellige wrote:
lgwalker(a)mts.net
bigwalk_ca(a)yahoo.com
Has
anyone ever repaired a Lisa 2 with the following symptoms: A
distorted video image on the upper 1/3 of the screen? I'm the high
bidder on a Lisa 2 on ebay
The first thing to do would be to pop the top off of the Lisa and
check the 4-5 video adjustment dials along the top of the video board,
as well as the adjustment pot on the PSU. To me it definately looks
like at the very least the size/position/sync adjustments are out of
whack. If you get this Lisa, let me know and as soon as I get the two
CD's back from a local guy I've loaned them to, I'll make you copies
of them. They have all kinds of PDF's, disk images, and other Lisa
info on them.
BTW James, what version of Irix are you running on your Indigo2?
Jeff 
11 a.m.
The adjustings pots at the top of the video board often need to be cleaned or replaced. I
also had to
replace a voltage regulator on one board, iirc.
Louis
On Sun, 07 Apr 2002 14:27:23 -0500, James Rice wrote:
#Has anyone ever repaired a Lisa 2 with the following symptoms: A
#distorted video image on the upper 1/3 of the screen? I'm the high
#bidder on a Lisa 2 on ebay
#
#url:
#http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2013387255&r=0&t=0&showTutorial=0&ed=1018246
402&indexURL=0&rd
#
#
#If you look at the screen shots, the video screen is distorted very
#similar to what my compact macs do with cold solder joints on the analog
#board. I figure that it's either a similar problem, dirty contacts or
#bad caps on the board. Just wondering if anyone has seen similar
#symptoms. I think I can get a Lisa video board from a friend in DFW who
#has a cache of Lisa's in storage. The guy's Apple collection is
#awesome. He has several of absolutely every product Apple ever made
#including a lot of prototype stuff that was never publicly released.
#
#I usually don't attempt board level repair, but for a Lisa, I'll make an
#exception. I thought Tony might have done one before. Have you ever
#seen this one before Tony?
#
#I think a Lisa would fit in perfectly with my NeXT's, Sun's, Indy and
#BeBox.
#
#Thanks,
#
#James
#You mean you're supposed to read the manual first?
#
#
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ard＠p850ug1.demon.co.uk -
jhellige＠earthlink.net -
jrice＠texoma.net -
lgwalker＠mts.net -
louiss＠gate.net