HomeRoast Digest


Topic: Week of death... Another one bites the dust (7 msgs / 191 lines)
1) From: Myron J
I have been roasting and brewing..but not even doing much lurking on the 
various lists, etc...but my IROAST has also bit the dust...
Hopefully it is only an electrical problem...since i am getting nothing on 
the readout what-so-ever...
Myron Joshua
Kibbutz Kfar Etzion
90912
Israel
+972-(0)2-9935 178

2) From: raymanowen
An electrical appliance with an electrical problem becomes an electrical
vexation.
The thermal fuse is probably connected ahead of everything else, just like
an overcurrent fuse. If it blows, everything is dead.
Replace the thermal fuse with a link of 18ga copper wire. Copper will melt
if the temperature gets too high, and open if the current gets too high. You
still have a thermal fuse in every respect, except it won't blow in normal
operation, which is a characteristic of every cartridge fuse.
Cheers, Mabuhay -RayO, aka Opa!
On 10/14/07, Myron J  wrote:
<Snip>
-- 
"When the theme hits the bass, I dance the Jig!" - -Virgil Fox at the Mighty
Wichita (ex- NYC Paramount) WurliTzer- 1976

3) From: Myron J
Thanks for the advice..or i can learn to change fuses, right? :-)
Myron Joshua
Kibbutz Kfar Etzion
90912
Israel
+972-(0)2-9935 178

4) From: Myron J
Ray,
My electrician says it is the power supply unit...He can fix it pretty 
easily for a fee of about $30. Would this go before the fuse??
best
myron
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5) From: Larry Johnson
It's electrical - anything's possible. Fuses blow because of an
excessive amount of heat, which is usually caused by an excessive
amount of current, which is usually caused by a short circuit
somewhere.
Howsomever; other things can go wrong; a bad solder joint, a loose
connection, a failed component (failed open - not shorted). Things
that will not necessarily cause a blown fuse. I spent almost 30 years
troubleshooting electrical things and most of the time the fuses
maintained their integrity throughout.
If I trusted this guy's troubleshooting skills, then I would let him
spend the $30.
On 10/16/07, Myron J  wrote:
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-- 
Larry J

6) From: Justin Marquez
That is one of the well-known corollaries to "Murphy's Law":
"The expensive electrical component will fail, thereby protecting the
50-cent fuse"
Safe Journeys and Sweet Music
Justin Marquez (CYPRESS, TX)
On 10/16/07, Myron J  wrote:
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7) From: raymanowen
I'm trying to imagine what the power supply unit of an iRoast looks like.
He's almost certainly talking about replacing the thermal fuse for a
total fee of $30. That's reasonable.
If he replaces the Fth with another Fth, it will blow again.
Guaronteed. A 16ga copper wire acts exactly like a thermal fuse,
Except: It will never "open" at random. It will last until some defect
evidences itself, at which time, it may smoke.
Then you have to replace the Fth And the bad part. Fuses don't need
bad parts or reasons to cause them to blow.
My client with 150A fuses in his 200A disconnect box was continually
blowing one of the three fuses at random. 200A fuses cost the same as
150A fuses. If a short will blow a 150A fuse, it will also blow a 200A
fuse. The 3/0 wiring to and from the box can handle the 200A, but the
highest leg was only 120A surge when the air compressor started.
These miserable things were acting like thermal fuses.
Cheers, Mabuhay -RayO, aka Opa!
Fuses both Suck and Blow-
On 10/16/07, Myron J  wrote:
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