Folks,

I am trying to identify the component in the attached picture (Sorry it is a little blurry). It is from a Wideband FM Discriminator. I do not have a schematic for the circuit, but best I can tell it looks like a diode. One side has -12vdc to it the other is tied to ground. The side that has the -12vdc feeds pins 2,3,6, and 7 of an LM79L05ACM chip. In a good circuit the output on pin 1 is -10vdc give or take a few millivolts. The problem I am having with a bad one is the -12vdc is being shorted to ground. Anybody know what this is and how I can determine the part number? Thanks in advance.

 

It looks a diode in a MELF/LL34 package. Are you sure the diode is the problem andit is not the 7905 that is shorted?

 

Thanks, it is the diode. I've checked the suspected bad one against another one on the good +12vdc side. I talked to Vishay and they don't recoginize it as one of there's. Trying to get info from ROHM and Pascall but have not heard back from them.