I have also learned the hard way that fuses actually do have a shelf life. A couple of years ago, I was repairing a power distribution board from my Elvira ATPM pinball. While playing, every time I sunk the ball into the right-hand ramp and won a free ball, the popper (that returns the ball) and the knocker would both fire at the same time. This would blow a certain fuse and the game lost those functions along with some other stuff. I would go into my basement and fetch a 20 year old "new" fuse from my old stock bin and replace the fuse. Before long, it would blow again. I ended up checking all of the solenoids, lamps, and whatever else was on the same supply line and found nothing wrong. I must have replaced the fuse 5 times in just a week. Finally I suspected that old fuses maybe do not hold up like they should so I ordered some new ones. I installed a brand new set of fuses and the machine has run just fine for the two years since. Lessen learned, do not install old fuses. Fuses are cheap and not worth the trouble that comes from trying to save old ones.
William Boucher
www.biltronix.com
----- Original Message -----
From: Bill
To: vectorlist@vectorlist.org
Sent: Wednesday, August 11, 2010 12:42 PM
Subject: RE: VECTOR: Got the V2000 HV blues...
Although it looks like you identified the problem, verifying the root cause for this one will satisfy many folks curiosity including mine. I have been burned by misbehaving slo-blo fuses before as well but not on a monitor. It just seems like I put too much faith in the fuse being ok and exhausting all other causes first. If everything looks ok and the fuse is blowing, metering the fuse current before tearing everything apart is a great idea that I will file away.
Bill
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From: owner-vectorlist@vectorlist.org [mailto:owner-vectorlist@vectorlist.org] On Behalf Of Kevin Moore
Sent: Wednesday, August 11, 2010 11:12 AM
To: vectorlist@vectorlist.org
Subject: Re: VECTOR: Got the V2000 HV blues...
"He's right, though, I've done a lot of "dart throwing" with this particular monitor. As a test engineer, I should know better - although in my defense, my area of expertise is aerodynamics, not electronics."
Seems strange, but sounds like you have it licked. Hey and since you are in Aerodynamics now might be a good time to go fly a kite. :) Sorry I couldn't resist...
Could be bad fuses, did you just try replacing the 1.5 with one of the suspect ones with the meter wired in?
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Received on Wed Aug 11 18:27:29 2010
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