John Baddeley
Printing Apprentice
- Joined
- Aug 22, 2016
- Messages
- 11
- Reaction score
- 3
- Points
- 11
- Printer Model
- mx870, MG5350 etc...
Hi all, i've just joined after googling my problem led me to another post here. Please tell me if I don't 'behave'!
We've had our mx870 from new, feeding it 3rd party carts and it has been fine.
It's been in use most days.
Now it does not print alternate strips of black text (eg document sent from a windows PC). If I do a black copy of a good print [from a different printer, of course] it will come out complete.
To determine which ink is being used, I ran tap water over a corner of both the print and the copy. The black text on both stayed without running, but the title of the printed one, which is [correctly] printed in red, smeared. This seems to me to indicate that both pc printing in black and copying in black uses the pigment ink. (Yes?)
The printed strips are about 9mm high, and the blank ones about 5mm high on the page. They alternate, very regularly, all down an A4 page. The strips do not relate to the lines of text at all. The blank ones do actually have faint dots in the bottom 2 mm.
Following advice elsewhere here, I've done a nozzle check, which prints most of the grid of black rectangles [some missing, but ok for our text use] and the solid black bars either side of 'PGBK' but only as far as the bottom of those four letters - the rest is blank. (This is the same as the text printing, ie 9mm of good , 5mm of nothing).
The bottom edge of the printed strip is very well defined, not faded out.
All the colour stripes (& grey) are there and close on perfect.
If I tell Word to print the text in red, or grey, it comes out complete.
I have removed the printhead, cleaned the contact pad, and the contact pins with a cotton bud soaked in isopropyl alcohol. As that did no good, I removed it again and poured isopropyl alcohol over the large circular hole corresponding to the black cart, and repeated that flush twice. Then reinstalled the PH and did a deep clean. Still stripey!
Any ideas, please?
Many thanks
John
We've had our mx870 from new, feeding it 3rd party carts and it has been fine.
It's been in use most days.
Now it does not print alternate strips of black text (eg document sent from a windows PC). If I do a black copy of a good print [from a different printer, of course] it will come out complete.
To determine which ink is being used, I ran tap water over a corner of both the print and the copy. The black text on both stayed without running, but the title of the printed one, which is [correctly] printed in red, smeared. This seems to me to indicate that both pc printing in black and copying in black uses the pigment ink. (Yes?)
The printed strips are about 9mm high, and the blank ones about 5mm high on the page. They alternate, very regularly, all down an A4 page. The strips do not relate to the lines of text at all. The blank ones do actually have faint dots in the bottom 2 mm.
Following advice elsewhere here, I've done a nozzle check, which prints most of the grid of black rectangles [some missing, but ok for our text use] and the solid black bars either side of 'PGBK' but only as far as the bottom of those four letters - the rest is blank. (This is the same as the text printing, ie 9mm of good , 5mm of nothing).
The bottom edge of the printed strip is very well defined, not faded out.
All the colour stripes (& grey) are there and close on perfect.
If I tell Word to print the text in red, or grey, it comes out complete.
I have removed the printhead, cleaned the contact pad, and the contact pins with a cotton bud soaked in isopropyl alcohol. As that did no good, I removed it again and poured isopropyl alcohol over the large circular hole corresponding to the black cart, and repeated that flush twice. Then reinstalled the PH and did a deep clean. Still stripey!
Any ideas, please?
Many thanks
John
