29 Sep
2005
29 Sep
'05
4:41 p.m.
I recently acquired through the generous efforts of a member here, a
Commodore PET 2001-32B. It boots up to just garbage characters on the
screen. Any quick things I can check or a 'suspect' part? Also if anyone
knows where I can obtain a schematic for this beauty, please let me know!
Thanks
29 Sep
29 Sep
5:49 p.m.
Sounds like possibly some bad memory... I would recommend pulling the
mainboard out, reseating all chips that are socketed and remove and
reseat all connectors and try powering up again, many times it can
simply be some oxidation build up.
Curt
Star Master wrote:
I recently acquired through the generous efforts of a
member here, a
Commodore PET 2001-32B. It boots up to just garbage characters on the
screen. Any quick things I can check or a 'suspect' part? Also if anyone
knows where I can obtain a schematic for this beauty, please let me know!
Thanks
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6:15 p.m.
I recently acquired through the generous efforts of a member here, a
Commodore PET 2001-32B. It boots up to just garbage characters on the
There are 2 stock faults on old PETs.
Firstly, the power harness connector (IIRC a 0.156" header) is rather
under-ratted. It tends to oxidise, get even hot, oxidise some more, get
hotter, etc. If the plastic has turned brown, replace it. Clean it anyway.
The second is that I've fixed several PETs by replacing the
cheap-n-nasty IC sockets with turned-pin ones.
screen. Any quick things I can check or a
'suspect' part? Also if anyone
knows where I can obtain a schematic for this beauty, please let me know!
There used to be a lot of Commodore schematics (and other info) on
ftp://ftp.funet.fi/ . I hope it's all still there or somebody has
mirrored it. I don't know if your machine is specifically there, but you
might find something close enough to help.
Thanks
30 Sep
30 Sep
5:31 a.m.
Am 29 Sep 2005 14:41 meinte Star Master:
I recently acquired through the generous efforts of a
member here, a
Commodore PET 2001-32B. It boots up to just garbage characters on the
screen. Any quick things I can check or a 'suspect' part?
It's a PET, so first thing is just to press back all chips
firm into their sockets. Solves 98% of all Commodore problems.
Gruss
H.
--
VCF Europa 7.0 am 29/30.April und 01.Mai 2006 in Muenchen
http://www.vcfe.org/
10:27 p.m.
On 9/30/05, Hans Franke <Hans.Franke at siemens.com> wrote:
It's a PET, so first thing is just to press back
all chips
firm into their sockets. Solves 98% of all Commodore problems.
I had a 2001-8 (static PET) that needed a v-shaped cardboard brace
under the middle of the motherboard - I sold the machine about 10
years ago, but I always suspected the problem was dodgy SRAM sockets.
If reseating doesn't work, socket replacement may be called for.
-ethan
6865
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participants (5)
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ard＠p850ug1.demon.co.uk -
curt＠atarimuseum.com -
ethan.dicks＠gmail.com -
Hans.Franke＠siemens.com -
starmaster＠gmail.com