HP34c radix change jumper

[isanchez]

Dear all,

I would like to change the UK/USA radix type (comma for thousands and point for decimal) into European (Point for thousands and comma for decimal figures).I know this can be done by cutting a jumper in the board.
I enclose a picture of the board and inside the blue circle the supposed jumper I have to cut. Would you please confirm this is the one? I am not sure, as I see two holes beside this jumper and this caused me some doubts.

Thanks in advance and kind regards

Ignacio

[Steve Simpkin]

Ignacio,
That is correct. You cut that jumper to display a comma for the radix point, as is used in many European countries.

This subject came up recently in a forum post about Fixing a HP-34C.

In that thread, Andi (AndiGer) posted a link to the following older thread, where Katie discusses this and has a couple of photos of the jumper.
https://www.hpmuseum.org/cgi-sys/cgiwrap...read=20346

Here is the power supply photo that closest resembles yours.


Tony (Teenix) also posted a link to the E-Series Service Manual that discusses the jumper on page 3-7.

[isanchez]

that's great!!

thanks a lot for your prompt answer!!

Thanks and kind regards

Ignacio

[agarza]

To change the radix, some power boards have a jumper wire that need to be cut or added.

But on others, the flexible connector has the trace "punched out". So you need to patch that trace.