Path: 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


 
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.
 
-- 
=============================================================================
= 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 .              =
=============================================================================