Hi all,
If anyone is interested, I uploaded some schematics of the classics and HP67 in PDF format. I have left out the logic interconnections as to me they complicate matters, however all connections are marked.
http://www.teenix.org/classSchm.zip
cheers
Tony
Tony,
Thanks a lot for the effort and for making these avaialble!
Cheers,
Harald
Thanks teenix
I love classic schematics!
Bernhard
Thanks---very useful and readable. On the HP-35 schematic, pins 15 and 17 of the 26-pin header have the same label, C3. One of them should be C4 I guess.
(06-10-2019 11:47 PM)Peter Monta Wrote: [ -> ]Thanks---very useful and readable. On the HP-35 schematic, pins 15 and 17 of the 26-pin header have the same label, C3. One of them should be C4 I guess.
Thanks Peter,
Fixed. There are probably other bugs there that I missed. I'm sure sometimes when I see an error, my mind totally ignores it for some reason. Maybe my blind spot is bigger than I think.
Recently, and after numerous checks, I put in a new PCB design for the replacement HP-67 CPU board and as soon as I got the message it was completed and on it's way I saw a circuit error :-( Thankfully nothing major.
cheers
Tony
Thank you for that, Tony!
Just a minor point - the HP67 Charger diode bridge is rotated clockwise 90° compared to the actual circuit (the four diodes should be pointing to the top of the 400µF cap).
Best to you - and thank you for all your research, hard work and delightful postings!
(06-11-2019 12:51 AM)Jim Horn Wrote: [ -> ]Thank you for that, Tony!
Just a minor point - the HP67 Charger diode bridge is rotated clockwise 90° compared to the actual circuit (the four diodes should be pointing to the top of the 400µF cap).
Best to you - and thank you for all your research, hard work and delightful postings!
Thanks Jim, (all Classics too) Fixed :-)
I put the charger on its own sheet.
cheers
Tony
Impressive! Congrats!
Thanks for sharing!
Kind regards
Ignacio
(06-10-2019 04:29 PM)teenix Wrote: [ -> ]Hi all,
I added schematics for HP-10 and HP-19C in PDF format to the zip file.
http://www.teenix.org/classSchm.zip
cheers
Tony
Thanks for the update! minor point: both the HP-10 and HP-19c are labeled HP-10.
-kby
(06-17-2019 03:34 AM)[kby] Wrote: [ -> ]Thanks for the update! minor point: both the HP-10 and HP-19c are labeled HP-10.
-kby
All Fixed :-)
cheers
Tony
Many thanks for those helpfull schematics!