Posted By
MMS on 2017-08-09 12:29:19
| Re: Possible 8501 replacement kit?
When I told PLA replacement, I meant the PLA IC in the Plussy that can easily die too. Certainly for a CPU replacement we need a CPU
PLA replacement project: http://blog.tynemouthsoftware.co.uk/2015/11/commodore-64-pla-replacements.html As far as I know the c64 uses exacly the same component.
As I know the top rootcauses of Plus/4 defect (with most frequent causes) (just guessed figures based on diacussions, threads) Maybe we can extend this list, how to prevent it, how to be sure it is the defect, and from where you can buy a new or used or alternative component
1) TED maybe 20-25% Causes: joysticks with autofire, overheating
2) 8501 ~15-20% Cause: overheating
3) Defective Roms ~20% Cause overheating
4) defective PLA ~10% Cause: ?
5) Defective RAMs Cause: ?
6) with c16: defective PSU Frequent Cause: underpowered design, overheating
|