Stylus C84 printing problem

[PJGdS]

I have an epson stylus c84 and recently it started having some printing problems with the black ink.
Prints are presented with many white lines and text looks misaligned.
I scanned some page to show you the problem:
https://i.imgsafe.org/a022fd3b16.jpg (white lines)
https://i.imgsafe.org/a02311e0ce.jpg (misaligned text)
https://i.imgsafe.org/a064490bea.jpg (misaligned text)

I removed the cartridges and cleaned the heads by carfelly injecting alcohol with the help a syringe until all ink was removed. I put the catridges back and ran a batch of cleaning cycles using the printer's maintanance utility but it did not good.I don't know what else I can do to fix the problem.

 

[Ink stained Fingers]

Please post the regular nozzle check pattern, not the alignment pattern .
You may clean the timing strip, that is a small dark gray plastic strip reaching over the print range and passing a sensor at the back of the printhead carriage. You may clean that cautiously with a piece of kitchen paper wetted with a window cleaner. The printhead reads the bar pattern on this strip and calculates the head position from there, it gets covered with dust and ink over time since it is very close to the paper being printed on and the active printhead

 

[PJGdS]

Thanks for you reply. I did as suggested and removed the cover to access the strip and cleaned it but the problem continues. I thought I could clean the encoder sensor but access is a bit tricky.
I printed a nozzle check pattern as requested before cleaning the strip

https://i.imgsafe.org/bd1f0034a0.jpg (nozzle check pattern)

 

[Ink stained Fingers]

Cleaning the timing strip is o.k., no need to access the sensor. You can directly upload images here - via the button - Upload a File. There are no nozzles missing as it appears but the slope of pixels looks somewhat irregular, the droplets appear to be deflected randomly. That is quite a typical effect , some ink residue is collecting at the rim of the nozzles. You may attempt to use cartridges with a cleaning fluid and print them empty or you can try to soak the printhead, the nozzle plate from underneath. You turn on the printer and as soon as the printhead starts moving you pull the power cord, now you can move the printhead easily into any position. You fold a smaller piece of kitchen paper, place it into the print range, soak it with window cleaner and move the printhead onto it and let it sit there for quite a while, then take the colored paper away and print a nozzle check again. You can do that over night. If that does not improve the printout I don't see further tricks anymore in light of the age of this printer model.