On Mon, 31 Aug 2009 05:18:42 -0700 (PDT), wrote:

:On Aug 30, 3:28*am, Ross Herbert wrote:
: On Sat, 29 Aug 2009 11:53:54 -0700 (PDT), "
:
: wrote:
:
: :I have an alarm board with two shorted surface mount diodes. These are
: :about the size of a quarter watt carbon resistor only just a slight
: :bit fatter. They are marked: MX6AA and MX50AA. Can anyone please
: :identify these for me? Thanks, Lenny.
:
: Are they glass MELF style or moulded plastic similar to either of these
photos?http://img.alibaba.com/photo/1078070...SMD-Diodes.jpg
:
: My first guess would be 1W zeners so perhaps you can check to see if they
have
: 6V and 50V ratings respectively (assuming they are not dead).
:They are not round more like flat and they are definitly shorted.
:Lenny

'Fraid you are stuffed then.. Other than figuring out the function by tracing
out the circuit around those devices and then making some intelligent
deductions...

No manufacturer ident (on the board or the system) you can approach?