Canon S400 printhead- how do I repair it?

  • Thread starter Thread starter Jacob Jackson
  • Start date Start date
J

Jacob Jackson

Ok, I've had this Canon S400 for a couple of years now and, even when using
refill kits with success, it seems that I still end up replacing the entire
$50 print head at least once a year (even after soaking the head in
solution, etc etc). It is my understanding that there is a resistor array
that heats the ink before exiting the head and that is what burns out. Now,
being technically inclined as I am, plus the fact that I'm tired of spending
$50 bucks a pop on a glorified piece of plastic, I'd like to try replacing
or modifying this array myself. Can anyone tell me where this resistor
array is located? At first I thought it might be near the series of small
tubes that carry the ink from the cartridge to the paper, but I don't see
it. There is also an area on the bottom of the printhead that is covered
with black epoxy. I removed the epoxy on a previous head and didn't see the
resistors. Of course, ultimately, a schematic diagram of the head and
surrounding circuitry would show the array, but I'm betting one isn't
available, or is it?

Any help would be greatly appreciated,
Jacob
 
I think they are not user-serviceable, most likely 'welded' into the
printhead.

My guess is any resistors would be near microscopic size anyway, and
would not resemble anything you've seen in a transistor radio, or heaven
forbid, a tube radio. So put your screwdriver away.

If you have an HP or Lexmark cartridge there are also resistors
supposedly in that tiny print head on the cartridge. You wanna guess how
small they are? Take apart an old cartridge and try to find them.

-Taliesyn
 
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