Article View: sci.electronics
Article #21190Re: capacitor question
From: Mike Carter
Date: Fri, 21 Apr 1989 23:43
Date: Fri, 21 Apr 1989 23:43
32 lines
1854 bytes
1854 bytes
Rob;
Sounds like there's two possibilities here. Maybe a third but we'll cover
that last.
(1) The capacitor you took out of the 1541, is it an electrolytic >?< If
it isn't and you replaced it with an electrolytic that will cause your
problem right there. 47 uF ? or .47uF ? If it's .47uF its most
likely to be a Vcc to ground spike/noise eliminator.
(2) Check around where you removed the cap. Lift some leads on a few
resistors..even if they look good. Check for a 10% value to what
they should be. SOme resistors wont actually FRY open completely, they
will increase their resistance by sometimes a Mega Ohm or two.
(3) Try resetting right after the power is applied to both the computer
and the disk drive. Remove the serial cable from the back of the
computer from the drive and power it up separately. DOes it do
the same thing? If it doesn't, chances are, the UART in the
'64 has problems or the HEX buffers on the channel itself.
(4) Have a fellow '64 owner bring over their drive and attempt to isolate
wether its the computer or the drive or both.
Good luck.
--
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= Mike Carter N7GYX, Phoenix AZ| Q: Why did the Chicken cross the road ? =
= hplabs!hp-sdd!crash!xroads!wiz| A: To ESCape the Main Menu . =
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!ncar!noao!asuvax!hrc!xroads!wiz From: wiz@xroads.UUCP (Mike Carter) Newsgroups: sci.electronics Subject: Re: capacitor question Message-ID: <657@xroads.UUCP> Date: 21 Apr 89 23:43:19 GMT References: <7200032@silver> Reply-To: wiz@xroads.UUCP (Mike Carter) Organization: Crossroads, Phoenix, AZ 85046 Lines: 32