Yes. My factory card is 8MB, so 16MB total is reported when installed.
Agree, since swapping ROMs from one board to another did not change the behaviour of the individual boards; i.e. the problem did not move with the ROMs.
Another vote for the 540c - fairly reliable and high spec, plus great industrial design. Crap PSU as @3lectr1cPPC says though, yes. I am a fan of the 140-180 models too but reliability is very poor.
Yeah. I’m just trying to decide if I should swap EMMs again or if the failure could be with a passive component. It is still putting out 5V on the middle pin, next to the +ve terminal.
Yes, it’s absolutely great to have batteries in these machines.
I haven’t fixed the PRAM battery, but I’ve got some VL2330s on order - I’ve built one for my PB1400 so I pretty much know what to do.
So I got another Apple EMM board working with a rebuilt battery pack. I moved an EMM chip from one board to another and it came to life. And even better, EMMpathy was able to correct all errors on the memory chip.
Given all the problems people are having restoring these batteries, I think...
Nope, it’s dead, I just finished disposing of the rotten Sanyo cells it had internally. Here are some photos of the EMM:
Here’s the cell config, looks identical:
It was the transistor immediately to the right of the one labelled with the blue arrow in your photo.
Check out the EMM chip on my third-party battery, it's labelled 68HC705. Is this compatible with the Apple ones? @GRudolf94 previously commented that the Apple EMM might be a 68HC05E1.
I've...
I went back to inspect the first EMM board I tried out, and found a broken transistor. I swapped it out with one from another board, and that got it working.
I've ordered the memory chip you linked to. The batt does seem to be working fine even with the errors, giving around 1:20 runtime.