HI IM TRYING TO REPAIR the cirquit board on my cars gps dvd player i shorted a smd diode that has the markings w2 on it.does any one know what w2 stands for on a smd diode or does the code only pertain to the manufacturer...if anyone can tell me what w2 means on a smd diode or point me in the right direction i would appreciate it.

 

looks like a 12ghz transistor:

TSDF1220RW
12Ghz npn 6v 20ma

here is a site where you can search codes:

http://www.tkb-4u.com/codes-and-markings/smd-codes-markings

 

thks for your help bill, i hope thats what it is so i can finally replace it. typing w2 diode or simular on search engines wasnt yealding much usefull info.

 

If it's a diode marked "w2" it is probably a "house" marking.

Manufacturers use "house marked" parts to help thwart reverse engineering efforts and to keep people from stealing their designs.

I don't see why a 12GHz transistor would be used in a DVD player. Perhaps it's related to the GPS portion of the circuit?

 

not all manufacturers employ this.

a prime example:

rockford fosgate.

get a copy of their schematics and you will see that they are marked "company proprietary". open up a corresponding amplifier and you will see standard marked components.