On Sun, 8 Dec 2002, Tony Duell wrote:
> > Commodore 64 Repair Made Easy
> >
> > 1. Pick up broken C64
> > 2. Walk to your parts bin
> > 3. Place C64 in parts bin
> > 4. Go to local thrift store or log on to eBay
> > 5. Search for C64
> > 6. Buy it
> > 7. You have now "fixed" your Commodore 64. Pat yourself on the back for a
> > job well done.
>
> Err, it's just possible that the original poster wants to _learn_ about
> computer repair (that's real computer repair, not board-swapping!). The
> C64 is a fairly good machine to practice on because they are so common.
> If you make a mess of it, you've not done too much real damage.
Sorry, I couldn't resist ;)
> ARD's guide to C64 repair :
>
> 1) Check the outputs of the power brick
> 2) Check the supply voltages at the ICs on the mainboard
> 3) Check if the master clock is running. Is it getting to the CPU?
> 4) Check data and address buses for activity. Any lines stuck?
> 5) Check video circuitry -- is it attempting to access memory? Check
> video output signals.
For the novice repairer:
1. Make sure the power supply is working (use a meter, not your tongue)
2. Check if the fuse is blown
3. Swap all the socketed ICs one at a time
4. Swap all the socketed ICs from another (ideally broken) C64
Apologies to Tony.
Sellam Ismail Vintage Computer Festival
------------------------------------------------------------------------------
International Man of Intrigue and Danger
http://www.vintage.org
* Old computing resources for business and academia at www.VintageTech.com *
Received on Mon Dec 09 2002 - 11:22:00 GMT