sci.electronics.repair@googlegroups.com

Today's topics:

* Using substitute Ink Cartridges in HP PSC 1315 - 3 messages, 2 authors
http://groups.google.com/group/sci.electronics.repair/t/1fa991cf19d8a400?hl=en
* Mixing 4 audio channels to 3? - 5 messages, 2 authors
http://groups.google.com/group/sci.electronics.repair/t/a9c921002b2ed750?hl=en
* Klipsch KSW15 fault - 1 messages, 1 author
http://groups.google.com/group/sci.electronics.repair/t/2a74dbb3b099b790?hl=en
* Hacking APC UPS's "Master/Controlled" Feature? - 2 messages, 2 authors
http://groups.google.com/group/sci.electronics.repair/t/97c4786ede874ee6?hl=en
* cheap nfl jerseys on sale in www.nike-black.com - 1 messages, 1 author
http://groups.google.com/group/sci.electronics.repair/t/2f42bb198320a8d9?hl=en

==============================================================================
TOPIC: Using substitute Ink Cartridges in HP PSC 1315
http://groups.google.com/group/sci.electronics.repair/t/1fa991cf19d8a400?hl=en
==============================================================================

== 1 of 3 ==
Date: Sat, Oct 29 2011 10:00 pm
From: Jeff Liebermann

On Sat, 29 Oct 2011 20:29:53 -0700 (PDT), "hrhofmann@att.net"
<hrhofmann@att.net> wrote:

>I have a HP PSC 1315 printer, scanner, copier. The instruction manual
>and the printer itself say to use 27 or 56 black, and 28 or 57 color
>cartridges. I have a couple of 21 black and one 22 color cartridges
>that are unopened. The pins and physical mounting appear to be
>identical to the newer cartridges. I know that I can just put the
>cartridges in and see what happens, but does anyone know for sure if
>these older cartridges can definitely be used?

The carts have chips inside that will complain that you have the wrong
cart. I have the identical printer in the office but have not tried
swapping carts. When I tried it with other printers and almost
interchangable ink and toner carts, it usually fails.

I suggest you look into refilling the carts. I've had really good
luck with refilling black ink carts and almost no luck with the color
carts. Bulk black ink is cheap at 1000ml for about $30. At 10ml ink
for the HP27 cart, that's 100 refills.

Since my customers that have such printers don't do much color
printing, I set their printer driver to print everything in black and
white. The almost empty color cart just sits in the printer doing
nothing. When possible, I try to sell them on a laser printer
replacement (HP LJ2300dn this week) and using the AOI inkjet printer
as a small scanner.

--
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

== 2 of 3 ==
Date: Sun, Oct 30 2011 9:05 am
From: "hrhofmann@att.net"

On Oct 30, 12:00 am, Jeff Liebermann <je...@cruzio.com> wrote:
> On Sat, 29 Oct 2011 20:29:53 -0700 (PDT), "hrhofm...@att.net"
>
> <hrhofm...@att.net> wrote:
> >I have a HP PSC 1315 printer, scanner, copier.  The instruction manual
> >and the printer itself say to use 27 or 56 black, and 28 or 57 color
> >cartridges.  I have a couple of 21 black and one 22 color cartridges
> >that are unopened.  The pins and physical mounting appear to be
> >identical to the newer cartridges.  I know that I can just put the
> >cartridges in and see what happens, but does anyone know for sure if
> >these older cartridges can definitely be used?
>
> The carts have chips inside that will complain that you have the wrong
> cart.  I have the identical printer in the office but have not tried
> swapping carts.  When I tried it with other printers and almost
> interchangable ink and toner carts, it usually fails.
>
> I suggest you look into refilling the carts.  I've had really good
> luck with refilling black ink carts and almost no luck with the color
> carts.  Bulk black ink is cheap at 1000ml for about $30.  At 10ml ink
> for the HP27 cart, that's 100 refills.  
>
> Since my customers that have such printers don't do much color
> printing, I set their printer driver to print everything in black and
> white.  The almost empty color cart just sits in the printer doing
> nothing.  When possible, I try to sell them on a laser printer
> replacement (HP LJ2300dn this week) and using the AOI inkjet printer
> as a small scanner.
>
> --
> Jeff Liebermann     je...@cruzio.com
> 150 Felker St #D    http://www.LearnByDestroying.com
> Santa Cruz CA 95060http://802.11junk.com
> Skype: JeffLiebermann     AE6KS    831-336-2558

HI Jeff:

I appreciate your comments, I'm going to try the swap later today and
will report results.

I already refill cartridges with ink from Stratitec. I have refilled
some cartridges more than 15 times, eventually they start to streak
because some of the jets get tired<g>. Had good luck with color also,
I never put in enough to fully fill the limited color volume, maybe
2/3 of what is claimed to be the refill amount, that way there is no
slopping over or out. I usually just drill the vent hole a little
larger to inject, and cover it with tape when finished.

The only problem is the "print" command always tells me the cartridge
is almost empty and you have to hit the "continue" command to keep on
going. But for the $$ saved, it is worthwhile. A little bleach on
the hands for 5 seconds gets any spilled ink stains off of me.

Bob H

== 3 of 3 ==
Date: Sun, Oct 30 2011 2:58 pm
From: Jeff Liebermann

On Sun, 30 Oct 2011 09:05:41 -0700 (PDT), "hrhofmann@att.net"
<hrhofmann@att.net> wrote:

>I already refill cartridges with ink from Stratitec. I have refilled
>some cartridges more than 15 times, eventually they start to streak
>because some of the jets get tired<g>.

Did you buy their "auto reset" cartridge?
<https://secure.datatekusa.com/product_info.php?cPath=285&products_id=2100&osCsid=c7p0443pf5kqpep97catoqjvn1>
or, you could go through this exercise to reset the cart:
<http://tricks-collections.com/ink-level-reset-for-hp-cartridge-21-27-56-58/>
<http://tricks-collections.com/alternate-ink-level-reset-for-cartridges-hp-21-hp-27-hp-56-hp-58-hp-22-hp28-and-hp-57/>

Streaking is not a common problem. Usually, it's a clogged jet that
causes a white gap in the printing. Whenever I get streaking, it's
usually a semi-hardened blob on ink on the edge of the cart. Cleaning
it with soapy water or ammonia cleaner usually fixes it.

>Had good luck with color also,

Not me. I get about a 1/3 yield from my color refills.

>I never put in enough to fully fill the limited color volume, maybe
>2/3 of what is claimed to be the refill amount, that way there is no
>slopping over or out. I usually just drill the vent hole a little
>larger to inject, and cover it with tape when finished.

My syringes don't have markers, so I have to guess on the refill
amount. However, slopping ink is not the problem. It's clogged jets.

>The only problem is the "print" command always tells me the cartridge
>is almost empty and you have to hit the "continue" command to keep on
>going. But for the $$ saved, it is worthwhile.

Try the cart reset procedure listed above.

>A little bleach on
>the hands for 5 seconds gets any spilled ink stains off of me.

I use maximum odoriferous ammonia cleaner. It cleans the dried ink
and also helps eject the crowd of visitors that often infest my
palatial office. If I have a clogged head, I use a small ultrasonic
cleaner for a few seconds.

This might be of interest:
"Wholesale - ink cartridge converter-hp27/28 /56/57 to hp21/22"
<http://www.dhgate.com/ink-cartridge-converter-hp27-28-56-57-to/p-ff80808122c3cedc0122c488ff847115.html>
The "conversion" is in the wrong direction, but it shows that
substitution can be done. However, the $435 price tag might make it
uneconomical.

Let us know if you're able to use the substitute carts.

--
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

==============================================================================
TOPIC: Mixing 4 audio channels to 3?
http://groups.google.com/group/sci.electronics.repair/t/a9c921002b2ed750?hl=en
==============================================================================

== 1 of 5 ==
Date: Sun, Oct 30 2011 2:26 am
From: DaveC

> Why not go active and get rid of the caps altogether?

Thanks John. Good simple design.

Can you suggest a good op amp for such an audio application?

Is it possible to use single-supply amps throughout?

Thanks,
Dave

== 2 of 5 ==
Date: Sun, Oct 30 2011 4:05 am
From: John Fields

On Sun, 30 Oct 2011 02:26:06 -0700, DaveC <invalid@invalid.net> wrote:

>> Why not go active and get rid of the caps altogether?
>
>Thanks John. Good simple design.
>
>Can you suggest a good op amp for such an audio application?

---
I used an LT1007 in the simulation.

Did you run it?
---

>Is it possible to use single-supply amps throughout?

---
Yes, but you'd have to use caps on the inputs and outputs and
reference the opamp + inputs to Vcc/2.

--
JF

== 3 of 5 ==
Date: Sun, Oct 30 2011 9:44 pm
From: DaveC

>> Can you suggest a good op amp for such an audio application?

> I used an LT1007 in the simulation.
>
> Did you run it?

No tools.

I made the L & R op amps fixed gain and added input level control pots:

<http://i43.tinypic.com/2hh3y12.jpg>

Comments?

Thanks.

== 4 of 5 ==
Date: Sun, Oct 30 2011 9:47 pm
From: DaveC

> <http://i43.tinypic.com/2hh3y12.jpg>

Should all pots be log taper?

Thanks.

== 5 of 5 ==
Date: Mon, Oct 31 2011 12:16 am
From: DaveC

> I used an LT1007 in the simulation.

Can't find them on Mouser.

Suggest another one that's good for audio?

How about LM833? ::

<http://www.national.com/ds/LM/LM833.pdf>

The SR and GBW beat the 1007... ;-)

Thanks.

==============================================================================
TOPIC: Klipsch KSW15 fault
http://groups.google.com/group/sci.electronics.repair/t/2a74dbb3b099b790?hl=en
==============================================================================

== 1 of 1 ==
Date: Sun, Oct 30 2011 3:33 pm
From: Trevor Wilson

I have a Klipsch KSW15 on the bench. The SMPS is fried. Klipsch cannot,
or will not supply a schematic, nor the PSU. They will, very kindly,
sell me a new plate amp for AUS$437.00! Seems straightforward enough. A
couple of MOSFETs, some resistors and diodes. One 'gotcha' though:

A part labelled THM3 is glued to one MOSFET. Presumably, some kind of
thermistor. No identifying marks. Looks like a small glass diode.

Any assistance would be appreciated. I can whack a whole new Class D amp
in for a couple of hundred Bucks, but I'd like to keep the cosmetics as
original as possible.

TIA.

--
Trevor Wilson
www.rageaudio.com.au

==============================================================================
TOPIC: Hacking APC UPS's "Master/Controlled" Feature?
http://groups.google.com/group/sci.electronics.repair/t/97c4786ede874ee6?hl=en
==============================================================================

== 1 of 2 ==
Date: Sun, Oct 30 2011 3:50 pm
From: "(PeteCresswell)"

I just bought two APC ES 750s.

The feature set touted on the box cites a "Master" outlet that
controls several "Controlled By Master" outlets.

My expectation was that the "Controlled" outlets would run on
battery until the "Master" device shut down.

The idea is that we can keep the router/switches working while
the NAS is on backup, but that they will not drain the battery
once the NAS shuts down.

Reading other threads, it seems like the "Controlled" outlets are
not really controlled by the master in the case of power loss:
they just shut down immediately.

Direct experience confirms this.

The Question:

Has anybody hacked one of these things so they actually function
as advertised? i.e. when power is lost, the devices connected to
"Controlled By Master" outlets stay powered up until the device
connected to the "Master" outlet shuts down.

My inner electronic/electrical illiterate is hoping that it might
be a simple as disconnecting a couple of wires in there and
re-connecting them to a different place.

Anybody?
--
PeteCresswell

== 2 of 2 ==
Date: Sun, Oct 30 2011 4:58 pm
From: "William Sommerwerck"

The specs for this discontinued product state that the five outlets across
the top are backed up by the battery.

These outlets will run until the battery voltage drops to where it can no
longer power the outlets. At that point, those five outlets will all shut
off. KA-CHOOM!

IF the device has a "master" outlet (I don't see it in the specs or the
photos), the "controlled" outlets turn on and off with the master, either
for convenience, or to save energy. (My audio system is wired this way --
the electronic crossovers turn the power amps on and off.) Once the battery
poops out, /everything/ powered by the battery shuts off. There is no
graceful shutdown.

You're confusing a convenience feature with operation of the device as a
source of backup power. The two (apparently) have absolutely nothing to do
with each other.

http://www.apc.com/resource/include/techspec_index.cfm?base_sku=be750bb&tab=models

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http://groups.google.com/group/sci.electronics.repair/t/2f42bb198320a8d9?hl=en
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