Any parts of a LASERJET 5Si that can be salvaged?

[JohnM]

I think the alternative is having your heart stop from the shock.

A

How about if I just don't put my tongue on electrical stuff, then I
won't have to be thankful for pissing myself;-)

I think I just don't ever want to be thankful for that..

John

 

[Christopher Tidy]

How about if I just don't put my tongue on electrical stuff, then I
won't have to be thankful for pissing myself;-)

I think I just don't ever want to be thankful for that..

A while back I read in a tabloid about a man who had a nasty accident
after he left a bar drunken in the early hours. He was walking home with
a few mates when he needed to relieve himself. His mates dared him to
pee off the parapet of a railway bridge, which he did. Apparently his
stream of urine hit the 25 kV overhead wire which supplied the trains,
and he had a difficult job explaining the situation to a doctor at the
hospital when he came to.

Chris

 

[Too_Many_Tools]

Your son is a very lucky kid to have a parent that allows and
encourages self discovery.

My parents had to hide the screwdrivers from me...nothing was safe from
my curious mind.

I predict that your son has a great future and an interesting life
ahead of him.

If I were his parent, I would be very proud of him.

Good luck with the great adventure of parenting.

TMT

 

[Tom Quackenbush]

Maarten wrote:

Depends mostly on the quality of the rectifier, and on whether there are
any bleeding resistors or voltage dividers. Give a vacuum type HV
rectifier and no bleeding resistors it should be easily possible that a
picture tube retains high voltage for weeks.

Completely off topic, but would you happen to know if "Quackenbush"
(Quackenbos?, Kwakkenbos?) means anything in Dutch?

Thanks.

R,
Tom Q.

 

[BrotherBart]

If you've got no pride, just pick up anything but a TV (unless you know

how to discharge the cap) from the garbage and give it a go.

When I was five years old my dad was less than impressed when I took his
pocket watch apart.

 

[Angrie.Woman]

When I was five years old my dad was less than impressed when I took his
pocket watch apart.

And just think what it would go for on eBay today!

A

 

[NSM]

How about if I just don't put my tongue on electrical stuff, then I
won't have to be thankful for pissing myself;-)

One of my favorite episodes of the Beverly Hillbillies was Jethro sticking
his tongue into the light socket to show Ellie May "What the big old dumb
bear" would do.

N

 

[NSM]

Sigh. And since my original post was that a child should not take apart
a TV unless a grown-up knows how to discharge the thing that holds the
charge...it is likely we're all in agreement essentially.

That's the LEAST of your worries. Ever seen a picture tube implosion?

N

 

[James Sweet]

BULLSHIT! Put your tongue on the HV lead of the flyback transformer six
months after you unplugged it and you'll probably piss all over yourself if
you are lucky..

I'd do it, I pretty regularly touch flyback HV leads, there's nothing in the
flyback that can store a charge, the tube itself does that. A B&W monitor or
a vacuum tube TV chassis can hold a charge for quite some time, but a solid
state color set has a focus divider that'll discharge the HV within minutes.
It's still always wise to ground the anode just in case though.

 

[James Sweet]

Sigh. And since my original post was that a child should not take apart
a TV unless a grown-up knows how to discharge the thing that holds the
charge...it is likely we're all in agreement essentially.

A

Well that's certainly true, though mostly due to the implosion hazard.

 

[Asimov]

"Rita D Berkowitz" bravely wrote to "All" (24 Jun 05 16:04:45)
--- on the heady topic of "Re: Any parts of a LASERJET 5Si that can be
salvaged?"

RDB> From: "Rita D Berkowitz" <ritaberk2O04 @aol.com>
RDB> Xref: aeinews rec.crafts.metalworking:25915
RDB> alt.marketing.online.ebay:26941 sci.electronics.repair:51363

Any TV that's been sitting for a week won't have a charge in it.

RDB> BULLSHIT! Put your tongue on the HV lead of the flyback transformer
RDB> six months after you unplugged it and you'll probably piss all over
RDB> yourself if you are lucky..


Rita?

The HV rectifier is typically a little leaky (especially when hotter)
and will by itself gently bleed off the charge (if 1^12 ohms and 25nF,
this is about 34 hours). But most HV sections have the focus divider
at the output of the rectifier and this will quickly drain the charge,
in under 2 minutes (about 500Meg ohms).

A*s*i*m*o*v

.... Wasted power is current squared times the resistance.

 

[NSM]

I'd do it, I pretty regularly touch flyback HV leads, there's nothing in the
flyback that can store a charge, the tube itself does that. A B&W monitor or
a vacuum tube TV chassis can hold a charge for quite some time, but a solid
state color set has a focus divider that'll discharge the HV within minutes.
It's still always wise to ground the anode just in case though.

You sure don't want to touch the ungrounded coating on a picture tube a
minute after switchoff while standing in a second story window. True story.

N

 

[[email protected]]

Completely off topic, but would you happen to know if "Quackenbush"
(Quackenbos?, Kwakkenbos?) means anything in Dutch?

Maybe the name of a location. As a word it has no real meaning.

 

[[email protected]]

Maybe the name of a location. As a word it has no real meaning.

Ah, only now I see your name... I don't know about it's etimology. It
could have something to do with ducks and wood, maybe your ancestors
lived near a ducktrap. I guess that's not too good an explanation...

 

[Tom MacIntyre]

BULLSHIT! Put your tongue on the HV lead of the flyback transformer six
months after you unplugged it and you'll probably piss all over yourself if
you are lucky..



Rita

True...PC monitors seem to be a different story, in my experience.

Tom

 

[Tom MacIntyre]

How about if I just don't put my tongue on electrical stuff, then I
won't have to be thankful for pissing myself;-)

I think I just don't ever want to be thankful for that..

John

Here I am with my story again...

We have, most of us, tongue-tested a 9 volt battery, I think. I once,
foolishly, tested a 10.6 VDC, 850 mA cellular telephone charger. Big
mistake...

Tom

 

[Tom MacIntyre]

When I was five years old my dad was less than impressed when I took his
pocket watch apart.

<BG>

My dad was a very good backyard mechanic, but for some reason didn't
get into the more intricate stuff. One sunny summer Saturday morning,
I placed a sheet of plywood on the ground, removed the Carter BBD (I
think) carburator from the 225 slant-six motor in the 1965 Dodge
Polara station wagon he was preparing for the road, and stripped it
down on the sheet of plywood. My dad had worked a backshift, and at
about 1130 or so came outside, and turned white as a sheet. He said,
"Are you sure you can get that thing back together?" I assured him
that I could, and I did, and the car lived to ride again.

I still don't understand why a man who could strip down a motor or
transmission, install new rings, valves, etc., had a problem with a
carburator...I couldn't rebuild a motor to save my own life, but I've
rebuilt a number of carburators...strange.

Tom

 

[Angrie.Woman]

Here I am with my story again...

We have, most of us, tongue-tested a 9 volt battery, I think. I once,
foolishly, tested a 10.6 VDC, 850 mA cellular telephone charger. Big
mistake...

I always have a story. In high school, I took a year of beginning
electronics.

During the first week, out teacher opened up a TV to show us how much power
was still present even though the the set was unplugged. He then proceeded
to show us how to discharge the thing that held the charge. Apparently,
using
a borrowed screwdriver that had a crack in the handle is not the proper way.

Angie

 

[Tom MacIntyre]

I always have a story. In high school, I took a year of beginning
electronics.

During the first week, out teacher opened up a TV to show us how much power
was still present even though the the set was unplugged. He then proceeded
to show us how to discharge the thing that held the charge. Apparently,
using
a borrowed screwdriver that had a crack in the handle is not the proper way.

Angie

<BG>

With solid state-uP based sets, the proper way involves the slow
draining of the voltage/current anyway...through a high-value
resistor.

One time we were sending a bunch of CRT's back to the manufacturer for
proof-of- replacement one time, and my wife was labelling them. She
was wearing a knitted sweater, and the sleeve brushed against the 2nd
anode. She wasn't pleased with the result. The CRT had been sitting
for weeks to months...

Tom

 

[BrotherBart]

My dad was a very good backyard mechanic, but for some reason didn't

get into the more intricate stuff. One sunny summer Saturday morning,
I placed a sheet of plywood on the ground, removed the Carter BBD (I
think) carburator from the 225 slant-six motor in the 1965 Dodge
Polara station wagon he was preparing for the road, and stripped it
down on the sheet of plywood. My dad had worked a backshift, and at
about 1130 or so came outside, and turned white as a sheet. He said,
"Are you sure you can get that thing back together?" I assured him
that I could, and I did, and the car lived to ride again.

A little word of advice to the technically curious youngsters out there.
NEVER use your mother the beautician's professional diamond coated nail file
to deburr the driveshaft of the lawn mower engine you are rebuilding.

It makes your butt hurt really bad.