What is this 6209 G from sharp calculator?

[Paul Andrews]

Hi,

I'm salvaging some tubes from an old (broken) Sharp calculator and there is this on the display board (unfortunately I couldn't de-solder it so it is a little beat up, though probably salvageable). I can't find out what it is, does anyone know?

[SWISSNIXIE - Jonathan F.]

Do you know where this part was located, or what was next to it?

[Paul Andrews]

It has connections to each of the cathodes. There are twelve cathodes for these tubes (CD80-P), so twelve pins are connected each to a different cathode (that might be 11. There is one trace that is difficult to follow). That leaves 8 pins on the device itself. Each cathode on a tube is connected to the same cathode on every other tube. There are 16 tubes in total (for fear of stating the obvious 2x8). Four of those remaining pins are connected to a NEC upd162c. I will post a photo of the board with the device in place. 

On Apr 22, 2017, at 4:58 PM, SWISSNIXIE - Jonathan F. <jfre...@gmail.com> wrote:

Do you know where this part was located, or what was next to it?

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[Paul Andrews]