Zener diode broke in half

[Pentium4]

I wanted to remove this glue so i heated it up with a heat gun, just enough so that I could remove the glue on the upper right to replace the Fuhjyyu caps, and also to fix a cold joint on that zener diode. Well, even after letting it cool, right when i put my solder tip to heat up that joint it instantly broke in half. I don't know what I need to know to find a replacement for that little guy.

[selldoor]

Re: Zener diode broke in half

Apparently 1 N suggests it is a rectifier diode.

Are there any more clues on the other side?

[Kiriakos GR]

Re: Zener diode broke in half

Try first 1N4148

[budm]

Re: Zener diode broke in half

Trace out the connection to see how the Cathode and the Anode are connected. Straight shot pictures of both top and bottom side will help. Also where is this board from?

[ben7]

Re: Zener diode broke in half

Apparently 1 N suggests it is a rectifier diode.

Are there any more clues on the other side?

Nooo, 1N4742 for example, is a 12V zener diode.

Those glass diodes can be a pain to remove, the heat probably caused a stress failure here, but they crack easily anyway!

[Pentium4]

Re: Zener diode broke in half

Thanks for the replies! Here's a picture of the top, this is a daughter board off of a Topower PSU. Looks like that left Fuhjyyu cap is leaking electrolyte, can't even trust the small value ones! The chip on the right that got washed out in the picture is a TL494

[budm]

Re: Zener diode broke in half

So the Anode of the Diode is connected to pin 11 of that IC LM339, PIN 11 is the non-inverted input of the Op-amp?

[Pentium4]

Re: Zener diode broke in half

Yes I believe so

[budm]

Re: Zener diode broke in half

So it may be just small signal diode like 1N4148 (1N914), not zener diode.

[Pentium4]

Re: Zener diode broke in half

Thanks budm! It looks identical to the ones on the other side?

[budm]

Re: Zener diode broke in half

It looks like it was a mod by the factory, I do not know what those diode on the top side are.

[selldoor]

Re: Zener diode broke in half

Pentium 4 When I asked if there were any clues on the "other side"
I meant on the other side of the Diode- not the other side of the board.
There seems to be markings other than 1N on the ones on the other side of the board but we cant make them out.