TM500 Mainframe common problems for each model?

Jared Cabot


I have a number of TM500 mainframes here I'm working through restoring alongside my collection of modules and I've seem mention of each mainframe having certain quirks and things to look out for and replace etc.

Can anyone with experience with these units list off the common faults you've seen and improvements you've made for the different mainframes?
I currently have 3x TM501, a TM503, a TM503B and a TM5006.


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