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

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!

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.

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

if

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.

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

"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> 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.

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minutes.

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.

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...

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

Tom

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

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

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

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

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.

And I'm mighty cautious of microwave ovens.

I have a question. If I put a cellphone in a microwave oven, close the door, call the number....should it ring?

Why is it that I feel the need to ask "Did it?"?