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Newbie questions picked up a bunch of compact macs.

mikes-macs

Well-known member
What is the 9 pin connector that is shown in SE/30 #3?
It looks as though it’s connected to the monitor if I’m seeing this correctly, or is there a PDS adapter is the slot?
 

melbourne

Member
Hi,

Yes, its patched into to video harness. Maybe it was used to drive a mono external monitor in the past?
There is no board on the expansion slot. It looks like a hack the previous owner did.

-Mike
 

melbourne

Member
Nice haul!
On the question of capacitor kits, I've been using recapamac.com.au as a reference, and ordering them off digikey.
Thanks, I’ll place my parts order once I take all the machines apart and see whats wrong with each.
 

melbourne

Member
Caps on an SE/30 logic board are 10x 47uF @16V SMD electrolytic and a single 1uF 50v SMD electrolytic. I'd just buy them rather than a kit, because there are only two types.

I tend to replace them with tantalum, and it is good practice to use 25v tantalum for the 47uF caps.
Hi,

I have a dim CRT on one of the SE/30’s is that a sign of bad caps? I have’t tried adjusting the CRT pots only the brightness control on the front.

Mike
 

melbourne

Member
As far as leaky caps go, that board you pictured is in excellent shape for an SE/30. C13 looks to be the only cap that really barfed up all over the board. The rest are visibly leaking, but not as bad. I think you lucked out. Should be a relatively easy recap.

Here's a recap guide for an SE/30. Here also is a video. Same website has information for different boards.

The usual places for caps is Mouser or Digikey. If you're Australia (just guessing from your name), then you could try emailing the chap from the Recap Guide I linked to. He may have some recap kits.
Thanks, I have lots of reading to do.

-Mike
 

Phipli

Well-known member
Hi,

I have a dim CRT on one of the SE/30’s is that a sign of bad caps? I have’t tried adjusting the CRT pots only the brightness control on the front.

Mike
It isn't no. It can be a worn out tube. But could be a fault on the analogue board.
 

Phipli

Well-known member
I primarily collect Apple II, Atari and Amiga home computers
You forgot Acorn computers :)

1280px-AcornArchimedes-Wiki.jpg
 

melbourne

Member
Looked at SE today, this one had a soldered on battery. Desoldered and will order a holder.
Has 4 MB and cleaned board and it booted right up.

4749622B-D0F1-486B-86A6-DF619CC15FF4.jpeg7D5DB703-1EC7-4D70-A233-CC161AB0D9E0.jpeg
 
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