Please help me ID these ICs

Other Hardware General Electronics
1

I'm trying to repair/reverse engineer 32x16 flip-dot display (by Hanover).
There are 2 ICs that I couldn't identify yet, they marked as:
HC75 and HC139 (url to image)

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Also I know that each flip-dot's magnetic coil supposed to have diode, but I'm a little confused that these (on the image above) have 3 pins which can be ok for SMD diodes, but all 3 are connected!
There's one for each flip-dot. Are these diodes or something else? They have JE markings on them...

2

I think the sot23 packages are fets or transistors - though I've also seen dual diodes in packages like that.

The others look like 74hc75 and 74hc139

3

DrAzzy:
I think the sot23 packages are fets or transistors - though I've also seen dual diodes in packages like that.

The others look like 74hc75 and 74hc139

Thank you!
I just cross referenced SOT23 and JE markings and I'm sure it's BAV99 dual diode!!! :slight_smile:
It does test like dual diode! That helped me a lot, I already found bad one on the board that was causing one flip dot not to flip. I re-soldered it from another dot and it works now!