MrGasS27
Well-known member
Hi everybody
This summer I broke the diode D1 on my first gen Macintosh LC while testing some prototype boards, since then I need power from the molex plug in order to fire up my BlueSCSI internally, while a BlueSCSI attached to the external port works fine with termination power.
I already published this issue on a facebook group and somebody pointed out that D1, marked 43XH on my motherboard, could be a 200mA / 40 V diode.
I downloaded a reverse engineered Macintosh LC schematic from here , but D1 is undocumented.
After few researches on the SMD codebook, I discovered that 43 leads to BAS40 and, accordingly to the schematic, BAS40-6 could be a potential candidate because it effectively reflects the characteristics described above, but I would like an opinion from this forum before I turn my LC from a pizza box to a firework box.
For the sake of documentation, I'm attaching few pictures that I made in these days.
Does someone figured out what the exact replacement for D1 is?
Thank you a lot and happy new year
This summer I broke the diode D1 on my first gen Macintosh LC while testing some prototype boards, since then I need power from the molex plug in order to fire up my BlueSCSI internally, while a BlueSCSI attached to the external port works fine with termination power.
I already published this issue on a facebook group and somebody pointed out that D1, marked 43XH on my motherboard, could be a 200mA / 40 V diode.
I downloaded a reverse engineered Macintosh LC schematic from here , but D1 is undocumented.
After few researches on the SMD codebook, I discovered that 43 leads to BAS40 and, accordingly to the schematic, BAS40-6 could be a potential candidate because it effectively reflects the characteristics described above, but I would like an opinion from this forum before I turn my LC from a pizza box to a firework box.
For the sake of documentation, I'm attaching few pictures that I made in these days.
Does someone figured out what the exact replacement for D1 is?
Thank you a lot and happy new year
Last edited: