Can the printer convert NEGATIVES into POSITIVES when printing ?

there is option can use to print negative or positive

No. Negative would be negative.
If you wish to get some details; check the site linked here. Pull up older posts.
http://electro-medical.blogspot.com/

They are attracted to each other. Like charges - two positives (protrons) OR two negatives (electrons) repel each other. Opposites attract - and like repel.

There are several options but the most practical one is to get a scanner that scans transparencies. They are not cheap but are the most effective. Another option is to project the slides onto a special screen and then photograph them with a digital camera. This can be done with 35 mm negatives as well and then they can be turned into positives with software.

A multi-purpose printer scanner cannot scan negatives or slides.
You need a slide scanner or a flatbed scanner that is capable of scanning negatives and slides. Not all flatbed scanners are capable of scanning slides and negatives.

i think your talking about a line out converter which takes a speaker signal and turns it into a rca signal? if so you need to findthe front speaker wires you can either twist both positives and both negatives together and use one set of speaker wires or just hoo up both sets to the right and lest speaker wires. whites and greens are left and greys and purples are right...then you should just have to plug your rca's into the L/O converter then the input on your amp. Hope this helps!

The problem was fixed after applying the calibration in the Scangear software delivered with the scanner.
It works fine now!

Maybe it's low on ink or you need to run a cleaning cycle. Try printing the test pattern and look for any missing lines or streaks.

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Excel see a cells format as having four Sections. These are, from left to right: Positives;Negatives;Zeros;Text.

To hide zeros cell-by-cell use a Custom Number Format like 0.00;-0.00; where 0.00 is desired format for non zeros. Note the use of -0.00 for negatives.

To hide zeros on the Workbook level go to Tools>Options>View - Zero Values.

Does it come with an ink ribbon? If so, it's in upside down.