I've just been through the Bourns filter problem on my 512Ke.
Fortunately, it is easy to test the filters without removing. With power off, just put a multimeter across each of the inner 8 pairs of pins, in the 200k resistance range. If it fluctuates up and down (filling the cap) then settles at around 50R on each cell, each RC network is OK.
New filters seem to be about $3-8 each, depending on supplier.
The FDD pinouts are also very picky and worth checking for each model that you plan to attach. Watch out for -12v on pin5/9 and whether your device uses that or should be isolated from it. I blew a filter finding that out the hard way.
Rick
Fortunately, it is easy to test the filters without removing. With power off, just put a multimeter across each of the inner 8 pairs of pins, in the 200k resistance range. If it fluctuates up and down (filling the cap) then settles at around 50R on each cell, each RC network is OK.
New filters seem to be about $3-8 each, depending on supplier.
The FDD pinouts are also very picky and worth checking for each model that you plan to attach. Watch out for -12v on pin5/9 and whether your device uses that or should be isolated from it. I blew a filter finding that out the hard way.
Rick