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| Mac IIsi PSU inductor value |
Posted by: captjon320 on 2022-03-20 11:56:25
Hello all,
I accidentally removed the L221 inductor from a Mac IIsi PSU when I was removing caps and don’t know what value it was.
If anyone can point me in the correct direction, it would be much appreciated.
I have circled it on the photo for reference. |
Posted by: robin-fo on 2022-03-20 13:13:57
It's 4.7µH according to the BOMARC schematics. If you want to be rally sure, I can open my IIsi's PSU for you to find out more. |
Posted by: captjon320 on 2022-03-20 13:25:05
It's 4.7µH according to the BOMARC schematics. If you want to be rally sure, I can open my IIsi's PSU for you to find out more. Nice,
Thank you very much. Didn’t realize that I accidentally removed it 4 months ago when I was on a cap removing day!
Would this be an acceptable part?
There is no reason to open yours up, I’m sure the schematic is correct. Where can I find that resource? |
Posted by: robin-fo on 2022-03-20 14:14:07
You can find the schematics for the IIsi and other early 68k Macs here. I cannot confirm that your part will work fine, but it looks right to me. You also need to check for the correct lead spacing. |
Posted by: chue on 2022-03-21 08:43:02
I happen to have mine open, as I'm recapping it as well. Here's a photo of the marking on the inductor. I don't know what it means, but it says "4R7". |
Posted by: captjon320 on 2022-03-22 05:59:26
Thanks, I just ordered it up. |
Posted by: captjon320 on 2022-04-15 14:15:43
Okay, I can verify that this part from Digikey is a correct replacement part for the inductor above.
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