DL4 (replacing 3.6v with a 5.1v zener diode) - safe?

[jimosity]

I've got a Line 6 DL4 with a blown 3.6v zener diode.
I don't have any 3.6v's, but do have 5.1v.
Is it safe to use a 5.1?

[JKowalski]

I don't think so. To make absolutely sure you'd have to consult a schematic, but zener diodes are usually chosen for specific voltages for a good reason. Especially if it is a part thats blown...

Probably power regulation, to prevent some digital chips from being overvolted by some voltage spike?

In any case, you should replace it with a 3.6V zener to be safe.

[Processaurus]

Safe but wouldn't work.  The 3.6v Zener drops down the voltage that the 3.3v regulator sees on its input, your 5.1 would be dropping an extra volt and a half, and be cutting in to the extra voltage the regulator needs to see on its input to be able to regulate and not drop out.

http://www.aronnelson.com/gallery/main.php/v/MrHuge/Line+6/DL4_ps.jpg.html