[Dr_C]

CONCLUSIONS
=========

1/ In this sample of faulty C8515 decoders none had failed bridge rectifier diodes.
2/ At least 8 out of 14 (57%) only replacement of the two MOSFETs was necessary to achieve a full repair.
3/ The other main fault was damage to one or other of the two npn transistors that drive/control the MOSFETs
4/ There was one case of a failed on-board ferrite bead inductor and one case of a damaged interconnect track.
5/ The AO3434 and AO3401 as used in the rev H provide a good upgrade path for the earlier rev F and rev G decoder versions.

Hope the above was useful and enjoyable, at least for some ;)

c