Digest for sci.electronics.repair@googlegroups.com - 11 updates in 4 topics

Trevor Wilson <trevor@SPAMBLOCKrageaudio.com.au>: Feb 23 04:12PM +1100

On 23/02/2016 11:19 AM, Jeff Liebermann wrote:
>> The good news is that I now have a proper interpretation of the fault code.
 
>> 50.8 = Low fuser temperature (Subthermistor)
 
> Thank you for delivering the error message.
 
**It is the same as the one I supplied in my original post.
 
> to end and you should see about 15 for 117V and twice that for 220V. I
> think I know where I can find a 3800 to measure, or just ask in the HP
> forums or FixYourOwnPrinter forums.
 
**As soon as I figure out how to dismantle the fuser, I will check those
things.
 
 
> This article suggests that it might be low line voltage:
> <http://www.fortwayneprinterrepair.com/wordpress/2011/11/06/hp-color-laserjet-3000-3600-3800-and-cp3505-50-1-fuser-error/>
 
**Unlikely in my case.
 
 
> Good find. I missed that one. Yes, that should work for 220V. I
> checked the numbers. Since the rebuild kit does NOT include a heater
> element, the replacment from China may be your only reasonable option.
 
**That was my thinking. I figure that I should probably replace the
heater, if I am overhauling the fuser. Anyway, thanks for all your
assistance. I'll keep you posted.
 
 
--
Trevor Wilson
www.rageaudio.com.au
 
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Jeff Liebermann <jeffl@cruzio.com>: Feb 22 11:16PM -0800

On Tue, 23 Feb 2016 16:12:08 +1100, Trevor Wilson
 
>**It is the same as the one I supplied in my original post.
 
Oops. I just went back and looked and there it was. My appologies.
 
--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
Bruce Esquibel <bje@ripco.com>: Feb 23 11:50AM

> 3000, 3600 & 3800 (but not the 'N' variant). It is a very large file and
> will take some time to complete, but, hopefully, will shed some light on
> what is inside the fuser and how to pull the damned thing apart.
 
For what it's worth, there is no difference between the N and non-N
versions, mechanically.
 
The N version means it's network (ethernet) compatable instead of USB only.
 
Either it's built in or uses something like the en3700 adapter.
 
-bruce
bje@ripco.com
MJC <gravity@mjcoon.plus.com>: Feb 23 12:10PM

In article <ag8ncblclgdginpggh5ac6as9jffbmn2k1@4ax.com>,
jeffl@cruzio.com says...
 
> ... Measure the resistance of the heater element from end
> to end and you should see about 15 for 117V and twice that for 220V.
 
Oh, same current and thus twice the power?
 
Mike.
Jeff Liebermann <jeffl@cruzio.com>: Feb 23 07:54AM -0800

On Tue, 23 Feb 2016 12:10:46 -0000, MJC <gravity@mjcoon.plus.com>
wrote:
 
>> to end and you should see about 15 for 117V and twice that for 220V.
 
>Oh, same current and thus twice the power?
>Mike.
 
Ooops. Some day, I'll learn to do arithmetic.
 
Power = Volt^2 / Resistance
For equal power at both line voltages:
P = 117^2 / 15 = 913 watts (cold)
913 = 220^2 / R
R = 220^2 / 913 = 53 ohms
 
--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
"Shaun" <stereobuff07@gmail.com>: Feb 22 11:06PM -0600

"Bruce Esquibel" wrote in message
news:na1tl2$9qr$1@remote5bge0.ripco.com...
 
> I have a Cyberpower 550VA USP whose battery needs replaced. I see many
> options during googling, but I'd like to find something that will last.
> I know some of the generics aren't the greatest. Suggestions? Thanks!
 
Heh, being you can get a whole new UPS for $40...
 
http://www.microcenter.com/product/319826/Standby_Series_550VA_UPS_with_USB-Serial_Ports,_GreenPower_UPSTM,_and_RJ11_Protection
 
and the replacement battery runs around $30, I really don't see the point.
 
Even the retail places like Office Depot and NewEgg selling the complete
unit
for $52, it's still not much of a decision to make.
 
-bruce
 
 
Besides Money, Ecologic impact should also be am important factor. It
requires a lot less land fill to recycle a battery vs replacing the whole
unit. Our Planet earth is in trouble, we have to consider it aswell as just
money.
 
Shaun
Bruce Esquibel <bje@ripco.com>: Feb 23 12:04PM

> Yep, Battery Sharks is lying on their web pile. The data sheet shows
> 4.52 lbs, which is LESS than the real Power Sonic. The battery is
> probably crap and I don't think I would trust the dealer.
 
All that may not matter though.
 
I dunno if you caught this story a day or two ago:
 
https://www.youtube.com/watch?v=BxZDzXv4fnM
 
The short version if you don't want to watch the whole thing, the guy owns
an expensive Nagra digital recorder where the rechargable battery is a $700
replacement item.
 
He took it apart and found a single Lithium cell battery and "foam". The
battery is about $40.
 
I mean people who buy/need Nagra hardware probably wouldn't care, the point
is, you can get ripped off on both ends of the market.
 
-bruce
bje@ripco.com
Bruce Esquibel <bje@ripco.com>: Feb 23 12:24PM

> requires a lot less land fill to recycle a battery vs replacing the whole
> unit. Our Planet earth is in trouble, we have to consider it aswell as just
> money.
 
Really?
 
You have a sure fire solution for getting the tree bark off your t-shirt
after you get done hugging it?
 
Recycling it usually means the shit is sent to some 3rd world country where
8 and 9 year old kids get to stand in mud fields in 100 degree heat smashing
the stuff into peices for 10 cents a day.
 
At least here in the states some landfills are being converted into methane
production green fields that'll end up as parks some day.
 
There is always two sides to a coin.
 
-bruce
bje@ripco.com
011sergiodiaz@gmail.com: Feb 22 11:18PM -0800

I want To hook a car amp and use car woofer can I run it thermal fuse
John-Del <ohger1s@aol.com>: Feb 23 04:21AM -0800

> I want To hook a car amp and use car woofer can I run it thermal fuse
 
I would use two of them..
Phil Allison <pallison49@gmail.com>: Feb 22 09:33PM -0800


> Based on a sample of one, that is extremely unlikely.
 
** Pal - you need a bigger sample.
 
> The shroud on the plug fits very tightly in the case,
> and there is additional friction from the banana plug.
 
** Fit tightness becomes irrelevant when the plug is shrouded.
 
Hate to think of someone's life or eyesight depending on it.
 
 
> Even if you snagged the meter, you will probably pull the probes
> out ot the CUT before the plugs come out of the meter.
 
** It is important to believe in " Murphy's Law" when discussing safety.
 
It can happen, so sooner or later - it will.
 
 
 
.... Phil
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