Embarking on SE/30 restoration

[jamesmilne]

I picked up an SE/30 off eBay, but it needs some TLC.

I got a nice surprise when the unit arrived, as it's got an Ethernet card. It's branded Technology Works, which is a new one on me.

As I expected, the battery had leaked and caused some corrosion on the PCB. The entire battery holder actually fell off when I removed the motherboard from the case.

After gently removing some of the leaked battery fluid & corrosion, it doesn't look too bad, but there are two immediate problems:

- crystal Y1 is gone

- RTC pins are pretty badly corroded

- capacitor C12 is also affected

I also fear some of the vias may have been affected.

Y1 is apparently a ~32kHz crystal. Is it possible to source a replacement RTC, or will I need a donor? One could probably replace it with a small modern MCU.

I'm aware the capacitors will likely need replaced, although a cursory glance doesn't indicate any that are bulging or leaking yet.

Any suggestions on what else to look for? I'm going to do a bit more cleaning with some isopropyl alcohol before embarking on anything more drastic.

 

[olePigeon]

As far as battery leaks, I've seen a lot worse.  Looks repairable.

Your caps have leaked, though.  I've never seen any SE/30 caps actually bulge, but they do leak.  You can tell because the surrounding component's pins are corroded.  If you're going to have your iron out, might as well recap it.

 

[jamesmilne]

Cheers olePigeon. Yeah, I'll order some replacements.

Is there a re-capping guide as to which ones need replacing? If it's every single one, it'll take a while

 

[olePigeon]

All of the cans will need replacing.  You may not have to replace those axial caps, but might as well since they're super easy to remove.

 

[jamesmilne]

Just answering my own questions, there's a 68kmla wiki page on cap replacement:

<https://wiki.68kmla.org/Capacitor_Replacement>

 

[techknight]

chances are, that board is garbage, and youll need another one.