Do you have any advice specific to System 9 games? I just acquired a Space Shuttle, which seems to boot and run normally with no obvious errors. But I know it's not a matter of "if", but "when" things crop up.
I have already done the rectifier fuse mod. Previous-owner botched a battery holder install with marble-size blobs of solder, and I'll have to clean some corrosion in the ground area... not too worried there yet.
I guess my main question is, how to determine what the "safe substitute" components are. I want to change the lamp matrix resistors as mine are rather... mesquite. I've recapped and rehabbed electronics including tube hi-fi's before so I'm familiar with the 1-for-1 process. And I understand Ohm's law to a point as far as some subs go (after all, those hi-fi components required some non-like subs)... but I'm not an EE so changing "this value for that one..." or "trade that transistor for this specific MOSFET option A or B"... how do you know it's better and/or safe?
Do you have any System 9 specifics to watch out for, or will most of this System 7 stuff apply?
Thank you for your guides. I've read a few of them and the playfield one inspired me to go a bit further on mine than I ever intended....