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A cbm 2001?

Se87

Experienced Member
Joined
Feb 22, 2012
Messages
110
Location
Ohio
Okay, now is the time for me to ask myself, "What on earth have I gotten in to?" I won a bid on eBay for a $115 CBM 2001 computer for parts. By looking at it the case was in great shape but needed a repaint. When I finally got it I realized that the seller couldn't open it because the back of the lid was tilted in. I used my pliars and pulled it apart to only be disgusted.

I measured 2 millimeters of dust over EVERYTHING and a common house spider as old as the CBM itself. This case hasn't probably been opened since 1978. I plugged it in and lucky as I thought I could be it booted up. I figured the ICs had jolted back into place on the trip so I cleaned the board with achohol and Q-tips, which I still wasn't happy with. There was still a dried on layer of dust. Just to make sure everything still is okay I plug it in and garbage fills the green monochrome monitor. I unplugged it and tapped on the legs of the chips and it turned back on flawlessy. I switched it off and back on and it died again.

At this time I was taking a break because I accidentally stabbed myself when trying to remove the circuitboard so the project was on hold for a few weeks. Yesterday I went to Lowes to get the cosmetics over with. Just a nice hint to any dirty PET users there is a very nice appliance spraypaint called "Biscuit" of all things and it matched flawlessy with my CBM. I also took out all the ICs for a 50/50 achohol-water wash for the board, which made it look right off the assembly line. Now also one pin was broken off one IC and I forgot the orientation and places. Great. I cleaned the pins to find I was suprised it worked at all, so horrendously dirty they were black, but Commodore Computers were quite sturdy in my opinion. I have a fire-survivor Vic-20 and a Commodore 64 that sat on a barn for 15 years. Not really a suprise when my rugged CBM was the most durable with the metal case.

Now I just go to google thinking there will be tons of websites about this just like the PET, but no. I couldn't find anything hardly about it. I know it's a type-2 mainboard but mine is the only model I've seen that has this bluish keyboard. Any help guys? I need to know which ICs go where and the orientation. Plus, to make it better, there is a tiny rip on one of the output on the power supply. Any and all help is appreciated, I'm literally dumbfounded by this.
 

Maverick1978

Veteran Member
Joined
Mar 29, 2010
Messages
1,966
Location
Florida, USA
PICTURES!! :) Sounds like your machine is one of the lucky ones... been through hell, but still works through it all.

I'm hoping to begin restoration on my PET 2001-8 and 8032 within the next 2-3 months. I'll need to get a few parts for them however...
 

Se87

Experienced Member
Joined
Feb 22, 2012
Messages
110
Location
Ohio
Once the paint is done I will. It was lucky, might have been in a school district.
 

carlsson

Veteran Member
Joined
Jul 30, 2003
Messages
6,275
Location
Västerås, Sweden
I think most sockets have notches, but perhaps not all. Which chips do you need to reseat, and which one had a leg broken off?
 

tezza

Veteran Member
Joined
Oct 1, 2007
Messages
4,709
Location
New Zealand
Congrats!

I'm surprised it works with a leg broken off. Or did you manage to solder it back on.

Tez
 

barythrin

Veteran Member
Joined
Oct 5, 2005
Messages
6,256
Location
Texas
You have the "chiclet" keyboard or the replacement/full keyed keyboard? I'm a bit surprised you're not finding information on that model though but not sure what you're seeking specifically. You might have a look around here
 

Se87

Experienced Member
Joined
Feb 22, 2012
Messages
110
Location
Ohio
You have the "chiclet" keyboard or the replacement/full keyed keyboard? I'm a bit surprised you're not finding information on that model though but not sure what you're seeking specifically. You might have a look around here

No help at all, mine is a CBM 2001 from 1978, board revision 2. As I just noticed there's one on eBay right now if anyone wants to find this out together :p. Oh and by the way it is the full size keyboard, with this bluish tint to it. Most pictures it is black. The owner was a business lease company so it had seen much better days, but at least it had a good home now, right?
 

MikeS

Veteran Member
Joined
Dec 23, 2005
Messages
7,478
Location
Toronto ON Canada
No help at all, mine is a CBM 2001 from 1978, board revision 2.
Ah yes, ask for help but don't answer any questions or send asked-for pictures that might help...

And of course don't reveal where you are despite having been asked at least once...

Maybe I'll have better luck: What's the number on the board?

Does it look like this (from the site that you were pointed to that was "no help at all"):
http://www.zimmers.net/anonftp/pub/cbm/schematics/computers/pet/2001N/320351-6.gif
 
Last edited:

Se87

Experienced Member
Joined
Feb 22, 2012
Messages
110
Location
Ohio
Ah yes, ask for help but don't answer any questions or send asked-for pictures that might help...

And of course don't reveal where you are despite having been asked at least once...

Maybe I'll have better luck: What's the number on the board?

Does it look like this (from the site that you were pointed to that was "no help at all"):
http://www.zimmers.net/anonftp/pub/cbm/schematics/computers/pet/2001N/320351-6.gif

As I have said before I am in Ohio. Just a little bit forgetful, I'll do that after this post. I think that might be the board, I'm not so sure though. I have to make the CBM to look acceptable before the entire world wide web sees it :)
 
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