HP48G Hardware Troubleshooting Questions/Tips

[ijabbott]

(10-17-2019 06:42 PM)toml_12953 Wrote:  

(10-17-2019 04:14 PM)TomC Wrote:  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,

Exactly what needs to be changed? I can edit PDF files.

The connections to the middle two terminals of the connector are the wrong way round.