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In my IIci power supply, the mystery chip is simply labeled “0600” with a date code of “9011J”. There’s no manufacturers name or mark on the chip.

I have a Macintosh IIci with an Astec Power Supply. During my last livestream, someone asked me if the power supply had the "infamous" daughter board... to which I had to answer yes. I think they mentioned it was due to the op amp on the board... or was it an optoisolator? I was trying to solder...

First Mac: LC First Owned Mac: Performa 5215CD (don't judge) Favorite Mac: it's a toss up between the iMac G4 and the PowerMac G4 FW800 Strengths: I break things Weaknesses: SMD soldering, desoldering, eBay, home-cooked food Hi, my name is Justin D. Morgan, but you can call me Justin. I...