" "Michael Kennedy" wrote in message
...
Does anybody know how to tell what kind of diode this is? I know it is a
zener diode, but thats about all I know..
Here is a picture
http://mikescomputer.homeip.net/LCD/DSC00382.JPG
It is at ZD1

Thanks in advance,

- Mike

The stripes look grey and red, so I guess that might make it 8V2, which
is a standard zener value.

Arfa



"Michael Kennedy" wrote in message
...
Well there is a black stripe in the middle does that matter?
I enlarged the picture.
http://mikescomputer.homeip.net/LCD/ZD1.JPG

Is this color chart I found correct?
http://www.oldradios.co.nz/data/index5.htm

Thanks,
-Mike

Is that black stripe a genuine paint one on the outside of the diode, or a
"ring of fire" where it's failed ? It's right over where the actual diode
inside is. I'm assuming that it has failed short-circuit or whatever,
otherwise, you'd be able to just measure the voltage across it ?? I'd still
have money on it being 8V2 as this is such a common value. Are there no
other indicators as to what voltage it is ? Voltage that it's zenering down
from, value of series reistor, working voltage of any following
electrolytics, markings on the board of power supply voltages etc ??

The chart appears to be correct.

Arfa