SE/30 Floppy Troubles — #4

Post #4 by uniserver

Source Forum	SE/30 Floppy Troubles — #4
Category	Troubleshooting
Post Date	Fri, 6 Dec 2013 - 13:22
Original URL	https://68kmla.org/bb/threads/se-30-floppy-troubles.29394/

Post

also here was a good post on how to check the bourns filter

viewtopic.php?f=3&t=21096

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

also i found these for 98 cents 87 cents if you get >50.

http://www.onlinecomponents.com/dale-mdp1603470g.html?p=11218616

per my photo

viewtopic.php?f=7&t=18026&start=50

I doubt the network filter is the issue here. - by the errors you were getting.

i found that when these network filters go bad ( bourns ) you get random annoying messages saying floppy in drive is not initialized would you like to format it? ---- and there is no floppy in the drive

or like the External will work fine but the internal will not. or the other way around.