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LF: Schematic for HP inkjet printer cartridges

K

Kirk

Jan 1, 1970
0
Yes that's right, HP inkjet printer cartridges. Need to know what the
circuits are on the cartridge from the contacts to the print head. Tried to
meter this out and it's not making much sense of the readings using an ohm
meter.

--
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670-2195

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K

Kirk

Jan 1, 1970
0
Need just about any known cartridge that is still in use. Any one or all of
these if anyone can. HP will not give out this information because they don
not want anyone remanufacturing used cartridges.

C1823
C6578
C6614
C6615
C6625
51625
51626
51629
51633
51645
51649
C6656
C6657
C6658
 
J

JeffM

Jan 1, 1970
0
remanufacturing used cartridges

1) If anyone wanted to answer your question,
he would have the 1st time you posted it.

2) It's obvious you don't have enough ability to do this anyway.

Why don't you go play in traffic?
 
M

Mantra

Jan 1, 1970
0
1) If anyone wanted to answer your question,
he would have the 1st time you posted it.

2) It's obvious you don't have enough ability to do this anyway.

Why don't you go play in traffic?

:)

Trying to figure out inkjet cartridges with a DMM is sort of like
using a DMM to figure out the design of your 2004 model-year car's
electrical system by poking around on the ICS2 or CAN bus jacks. The
signals going into the cartridge are not analog or even simple digital
lines; they are a fairly involved digital, network-like protocol
providing communication between the printer and the computer/drivers.

Every HP inkjet cartridges has a custom IC to 1) control extremely
fine printing pitches, and 2) to prevent re-use and reverse
engineering. My understanding is that ink and toner vendors are even
starting to using timers, flow monitoring, level monitoring and cryto
to prevent "non-conformant" use.

If you had a logic analyzer you *might* begin to have a hope of
figuring it out, but that's until they throw cryto and DMCA at you.
 
J

~^Johnny^~

Jan 1, 1970
0
Every HP inkjet cartridges has a custom IC to 1) control extremely
fine printing pitches, and 2) to prevent re-use and reverse
engineering.


How much do you want to wager?


--
-john
wide-open at throttle dot info

~~~~~~~~
Maybe I should ask Radio Shack. They claim they've got answers;
but frankly, if Radio Shack were our provider, we'd _really_ be in
trouble now, wouldn't we?
~~~~~~~~
 
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