Artur5
Printer Master
- Joined
- Jan 24, 2011
- Messages
- 1,298
- Reaction score
- 1,621
- Points
- 278
- Location
- Kmt. 0.
- Printer Model
- MB5150,Pro10s,i3Mk3s+,Voron2.4
Recently I thought of getting a spare printhead for my trusty ip30000. Since new units from genuine vendors cost as much as 75euro, when you add vat and shipping, I decided to gamble in one of these Chinese offers from Ali-Express. Maybe I’d get lucky and fetch one in good working order for only 25 euros.
Alas, no such luck!. See that puzzling nozzle test. Black channel shows clearly electrical fault. 25% of nozzles missing in a regular pattern. Annoying but, sadly, very common. Now take a look at the color patches. Everything yellow. No, I didn’t put yellow carts in the magenta and cyan slots!
I must explain that this printhead, although obviously used, was very clean without any traces of ink on the bottom plate around the nozzles or above the intake filters. In fact, I injected a bit of cleaning liquid through the intakes and the liquid dripping from the bottom was quite colorless.
After the first weird nozzle test I did a couple of cleaning cycles, but the result is always the same. All colors yellow, no cyan or magenta. Black 25% of nozzles missing.
Now, the only explanation I can think of is some sort of cross contamination, but there’s no mix of colors, just plain yellow. Or maybe somebody messed with the electrical conexions of the printhead and now all orders from the printer directed to the cyan and magenta channels are redirected to the yellow channel and therefore only yellow ink is actually ejected. Why and how anybody would do that? Never seen it before but, concerning printers, it seems that I know next to nothing. Care to throw your five cents about this, fellows ? Come to think of, I’m probably the owner of the only yellow-monochrome Canon printhead in the world,
Of course I asked the vendor a refund. Let's see what they say.
Alas, no such luck!. See that puzzling nozzle test. Black channel shows clearly electrical fault. 25% of nozzles missing in a regular pattern. Annoying but, sadly, very common. Now take a look at the color patches. Everything yellow. No, I didn’t put yellow carts in the magenta and cyan slots!
I must explain that this printhead, although obviously used, was very clean without any traces of ink on the bottom plate around the nozzles or above the intake filters. In fact, I injected a bit of cleaning liquid through the intakes and the liquid dripping from the bottom was quite colorless.
After the first weird nozzle test I did a couple of cleaning cycles, but the result is always the same. All colors yellow, no cyan or magenta. Black 25% of nozzles missing.
Now, the only explanation I can think of is some sort of cross contamination, but there’s no mix of colors, just plain yellow. Or maybe somebody messed with the electrical conexions of the printhead and now all orders from the printer directed to the cyan and magenta channels are redirected to the yellow channel and therefore only yellow ink is actually ejected. Why and how anybody would do that? Never seen it before but, concerning printers, it seems that I know next to nothing. Care to throw your five cents about this, fellows ? Come to think of, I’m probably the owner of the only yellow-monochrome Canon printhead in the world,
Of course I asked the vendor a refund. Let's see what they say.
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