HP48G Hardware Troubleshooting Questions/Tips

[TomC]

I too am very interested in having better 48G documentation beyond the commonly available schematics (by Marcel Flipse).

Perhaps some day when I have some extra time in my life, I will open a normally operating 48G and take some voltage and oscilloscope measurements.

By the way, if memory serves me correctly, the referenced 48 schematic by (by Marcel Flipse)has incorrect wiring of the serial port. I wish we could a hold of an editable copy of that schematic!

Cheers,
TomC

(10-16-2019 03:54 PM)Phenixg Wrote:  Thank you mfleming. I am working on it.
I wish there were as much detailed information about this landmark device as there are about the venerable 41. I really envy the 41 people; It is such a regrettable thing that some of us discarded our beloved toy just because a banal resistor become open or common transistor shorted.