68kMLA Classic Interface

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Dead SE/30 Power Supply (no fan, no voltages at floppy connector)
Posted by: bibilit on 2022-10-15 04:37:02
Dp3 and DP4 near the Tda4605
Posted by: stansteph54 on 2022-10-15 07:58:23
Dp3 and DP4 near the Tda4605
thanks a lot again for your help. I guess they are very common/standard diodes ?

Any idea to test the optocoupler ?
Posted by: bibilit on 2022-10-31 11:04:00
No way to test
Posted by: ScooberDiver on 2022-10-31 20:46:50
If you have that Sony CR44 out of the Mac, make sure you give it a decent load to get reliable voltage readings. I was only pulling 0.1 amps from the +5 rail and it caused low outputs on two other rails. I gave that +5 a much bigger load and everything was OK. Here's my before/after. Unfortunately I didn't have power resistors laying around that let me do a little more than 0.1Amp. I had to go way higher, as you'll see LOL.
Good luck.


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