Hi people, I am in need of some of your helpful advice again.
I have a SMD Zener diode that is totally naff - dead short. But even with a jewelers eye glass i cannot make out any ID markings on it.
It is from a faulty Proview PL926w power/inverter board that i have had kicking around for ages. The board had 0v on the 5v output pins. I have recapped the board because most of those on it were showing signs of bulging, but that did not solve the no 5v issue.
After a bit of probing i traced the problem back to a small zener diode that sits on the 5v line, it was shorted completely. Lifting the diode from the board restored the 5v output. But obviously that zener serves a purpose, so i would like to replace it.
The diode in question is ZD203, it can be seen towards the top left in the first picture below. I got this photo from another thread regarding this board - https://www.badcaps.net/forum/showpo...90&postcount=1
I hope SBlackfoot does not mind me showing his photos.
The trace runs from one leg of the diode straight to the 5v output pins. The diode sits right next to, and in parallel with R223 and C221.
Would any of you knowledgeable guys know what voltage rating that zener is likely to be? Would that be something you would be able to guess at seeing that it sits on the 5v line?
Thanks in advance.
EDIT: It looks the same as this one on ebay, only with a black band instead of yellow. ebay linky.
I have a SMD Zener diode that is totally naff - dead short. But even with a jewelers eye glass i cannot make out any ID markings on it.
It is from a faulty Proview PL926w power/inverter board that i have had kicking around for ages. The board had 0v on the 5v output pins. I have recapped the board because most of those on it were showing signs of bulging, but that did not solve the no 5v issue.
After a bit of probing i traced the problem back to a small zener diode that sits on the 5v line, it was shorted completely. Lifting the diode from the board restored the 5v output. But obviously that zener serves a purpose, so i would like to replace it.
The diode in question is ZD203, it can be seen towards the top left in the first picture below. I got this photo from another thread regarding this board - https://www.badcaps.net/forum/showpo...90&postcount=1
I hope SBlackfoot does not mind me showing his photos.
The trace runs from one leg of the diode straight to the 5v output pins. The diode sits right next to, and in parallel with R223 and C221.
Would any of you knowledgeable guys know what voltage rating that zener is likely to be? Would that be something you would be able to guess at seeing that it sits on the 5v line?
Thanks in advance.
EDIT: It looks the same as this one on ebay, only with a black band instead of yellow. ebay linky.
Comment