Is this an ink flow sensor? (Ink Jet printer)

I'm trying to troubleshoot an error with an HP ink jet printer (Photosmart
3210) that says "Ink System Failure". All other components seem functional.

In the printer there is a small PCB with a few soldered components that
appear to sense ink flow or pressure. It is in series with the pump output.

<http://i48.tinypic.com/o8xz84.jpg>

<http://i49.tinypic.com/r76kib.jpg>

How does this work? Are these 6 LEDs and photodiodes? Just detecting the
presence of ink doesn't seem likely. Wouldn't movement or pressure be what is
detected?

What does this PCB do and how does it do it?

Thanks.

 

Upon closer examination:

<http://i50.tinypic.com/2vdoa4m.jpg>

it looks like the printer controller is testing for continuity of the ink.
Could this be a simple presence / absence of ink in these tubes? I suspect
that some ink residue has built up on some of these tiny probes which may be
indicating no ink and generating this error.

Ideas?

Thanks.

 

If you're talking about the tiny black rectangular parts numbered
R1-R6, they are resistors.

 

I had a HP inkjet fax with several hundred MB of driver bloatware.
It refused to print B/W fax and complained colour cartridge was empty.
It has a separate B/W cartridge that was full. Sounds like their firmware
and software was written by sales people.

M

 

You can reset the memory on some cartridges.

http://www.misterinkjet.com/hpreset.htm

You tube video



Google reset memory for your model and you can probably find specific
instructions.

 

I read somewhere that inkjet printers have a storage compartment for

I can see this reservoir. It has one side covered by a translucent plastic
film. It's nearly empty.

And the "full" indication is calculated from the number of cycles it goes
through, not a sensor (there's no sensor on the reservoir). This is one of
the counters you can see in the service menu of the firmware (as well as
total pages printed).

Can anyone help me identify the part in the photographs and their function?

Thanks,

 

If those 6 pairs of solder pads are connected to 6 devices/components inside

Those 6 pairs of solder pads connect to the 6 pairs of heavy wires (I think
they're probes, not simple conductors) that terminate inside the plastic ink
manifold:

<http://i50.tinypic.com/2vdoa4m.jpg>

If there were indeed components inside the manifold (LEDs, photodiodes, etc.)
they would be much finer wires rather than these large conductors.

I suspect these are probes that detect the impedance of the ink when it is
present in each of the manifold's ducts. My guess is that it's a go/no-go
indicator of whether the pump has failed or an ink supply is empty (although
I think there are other sensors to detect this in the cartridge) or a hose is
plugged up.

[WB]

Indeed, any technology in the hardware to boost HP's (and other
manufacturer's as well) bottom line from maximum ink sales.

Thanks for your reply.

 

This is from the wonderful world of Epson it is so well known that you can
buy cartridge reset devices to reset the counter chips imbedded in their
cartidges. It looks like the new generation of these chips are using
serial numbers to keep you from being able to reset the chip.

An even dirtier anti consumer activity by Epson than they have done
prevously.

It sounds like the "Kodak" printer is actually an Epson in disguise since
thier sales are going away because of this.

It's a good reason to always aviod anything from Epson and spread the word
about them to kill all of their business as they deserve for this very
dirty anti consumer trick.

Forcing the throw away of up to half full cartridges is a real crime
aganst the customer!

Gnack

 

Two things: Each is its own separate process.

1) Reset the system by holding down the OK, Cancel, Black, and Color
buttons down at the same time and turn the 3310 off. Keep holding
the buttons down until the printer shuts off and the turn it back
on. You will have to turn the printer off twice and then it will
recalibrate. Make sure you have new cartridge in the printer so that
it can reset.

2) There is a patch available for your printer that might fix the
the problem. The link below is to HP's site.

http://tinyurl.com/7jqdc3

 

Oh, and I believe that is the heater circuit for the jets.

 

Have you actually looked for the repair manual for that printer online?

Yes. Nothing turned up.

If someone knows where to find the manual for HP Photosmart 3110/3210/3310
all-in-one printers (not the LaserJet 3210 -- why a company would duplicate
model numbers...?) please let me know.

Thanks for your reply.

 

Oh, and I believe that is the heater circuit for the jets.

There is 18 inches (45 cm) between this pcb and the print head. Hmm...

Thanks for your reply.

 

1) Reset the system by holding down the OK, Cancel, Black, and Color

I saw this item on a printer repair forum last week. Tried this 8 or 10
times. No help.

This is for another model printer. While similar, there is no such patch for
the 3110/3210/3310 printers. I'm not encouraged...

Thanks for your reply.

 

Can you take some measurements to figure out what it is? I would try
ohms and diode check between the pairs of pins, that ought to provide
some clues.

 

Can you take some measurements to figure out what it is? I would try

No diode effect measured. Resistance between each of the 6 pairs of "probes"
is 100K ohms. This, of course, is the measurement of the parallel SMD
resistor.

Note, there is only one sense conductor per color, and one Vcc (or Gnd --
haven't delved into the assembled and powered printer to determine this).

So, heaters are out of the question.

Would a centimeter of ink be in the neighborhood of 100K ohms? This, in
parallel with the SMD resistor, would create a 2:1 change in the voltage
across them when ink flows in the tube.

Just measured tap water, submerging DMM probe tips in a beaker: 300K ohms
across ~0.75 inch (~2 cm). (Don't have any ink lying around to measure.)

I'm tempted to just add 50K ohm resistors parallel to the probe connections
and see what happens.

Ideas?

Thanks.

 

No diode effect measured. Resistance between each of the 6 pairs of "probes"

A correction: R1, R5, R6 measure 100K; R2, R3, R4 measure 200K. This is true
of 2 different PCBs (the "subject" printer and a used spare), both from
printers with the same error code.

Maybe a manufacturing error (ie, these were supposed to all be the same
value)?

Ideas?

Thanks.

 

DaveC ha scritto:

Hi.
In that printer there is a sensor that can verify the presence or air
bubbles in the ink circuit.
I don't know if your piece is that sensor, but there is.
I am trying to fix a C6180 with the wll known ink system failure
problem: i can't find the service manual but i think i can have a
failure of the pump motor or of the circuit that control this motor.
The pump is located (in my case) in the left side of the printer (facing
the control panel) and (my thought) there is no sign of life of the
related motor even if i switch off and on the printer.
I am not sure about that: maybe this pump works only when a new set of
cartridge is installed in the printer (initialization) but, in my case
(following the instructions found on the net), i was not able to force a
cycle to eliminate trapped air.
If you have any solution, please, msg to me.
Thx
Slang

 

If you have any solution, please, msg to me.

Check your mail.

Dace