If it is an axial, through-hole diode (looking at Google images for "DO-41 9.1V" it seems to be), you will need a soldering iron with a pointy tip (as opposed to blunt), solder, a steady hand, the ability to remove the solder (a solder sucker helps)
(
http://images.google.com/images?hl=en&q=solder+sucker&btnG=Search+Images&gbv=2
)
and the knowledge that if you mess up, you can ruin the device (RoHS compliance requires hotter temperatures for repairs, and PCBs are manufactured more and more fragile).
Make sure you get the polarity right (plus and minus), or else the diode won't suit its purpose.
If it is a surface mount zener diode (search terminology: SMT) you may require more hardware for the repair. I am not familiar with all those methods. Anyone know more about zener diodes and surface mount?
_I_ have a SMT zener diode which needs replacement, and am not sure which part it is (it melted, and the similar parts on the PCB are not labeled well enough to read).
Hope this helps, Angie Baby.
08-31-2008
-James
James Bond was played by Roger Moore, August 2008
