Path: utzoo!utgpu!water!watmath!clyde!cbosgd!ucbvax!ALASKA.BITNET!FNRJH
From: FNRJH@ALASKA.BITNET
Newsgroups: comp.sys.zenith.z100
Subject: H-207 Floppy controller card
Message-ID: <8801160040.AA28243@ucbvax.Berkeley.EDU>
Date: 15 Jan 88 17:04:00 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Distribution: world
Organization: The ARPA Internet
Lines: 18


   This is a request for more infomation.  I was using my H-100 last night
when a capacitor on the floppy controller blew.  I have had this happen once
before.   The cap is C35 next to U22.   It just fried, black as a transistor.
Nothing else on the board even remotly looks damaged.   The result of the
cooking was the drive just kept spinning, lights on and rebooting only
results in aborting what ever I was doing.

It just appears to be a power filter cap?   I am planning on replacing it with
a new one that has higher tolerences.  Had a 10uF 15V in there.  May try a 20uf
at 25V.    Any suggestions or comments as to why this is happening?  built my
controller in 83 from assembly manual 595-2909    What does it cost to buy
a new controler.  (just curious. I doubt I would unless It is unrepairable.)

Thanks.    Robert J. Hale III
           FNRJH@ALASKA
           533 LongSpur Loop
           Fairbanks Alaska 99709