panasonic kx-p2023 printer paper sensor

I am using an 1123 which has some pins not printing. I want to use the 2023, which prints just fine except it won't print the last line or 2 of my service tickets(which are approx 3 1/3 inches tall) but stops and gives an out of paper error. I am printing from a DOS based program. On the 1123 I can turn the sensor off from software and it works just fine. I want to know how to turn off the sensor from software, if possible(like a batch file command when I turn it on in the morning, that's also how I set it to print condensed mode, or if I can find the sensor, figure out how to trick it into thinking there is still paper in front of it.

I appreciate the effort you have put into attempting to answer my question. I apologise if I haven't been clear in how I'm doing things.

I manually feed 3 1/3 by 8 1/2 inch pieces of paper, on which the DOS based program which I wrote long ago in Turbo Basic prints a service ticket. Then when the repair is done, I prints the parts, prices, total etc. on the back.

I can do a lot of things by sending codes to the printer, like ESC+SI puts it in condensed mode. But I mis-spoke in an earlier post when I implied that's how I turned off the sensor (it's been 3 years since I last had to do that. I forgot until I looked it up just now). Turning off the paper sensor on the 1123 is done from the front panel. Unfortunately the 2023 doesn't have as extensive a front panel control as the 1123 or 2123, which also works for me. But of the 2 2123s I own, 1 won't advance paper. And I only have 1 ribbon for it, although they are still available and if I can't figure out how to use the 2023 I will buy a case and use it. I have 3 cases of new ribbons for the 1123-2023 machines, plus a couple of dozen used ribbons I've been rejuvenating. I also own a working 1124, but it doesn't take single sheets like the others. I've been accumulating Panasonic printers from friends and on e-bay. I have some 9 pin, but they don't print acceptably in condensed mode. I also have a wd35, which was apparently the Canadian version of the 1123, which I am scrapping for parts. The currently failing printhead in the 1123 came from it. The original 1123 printhead disintegrated years ago, I pressed the wd35 into service until water from a fire upstairs 3 years ago leaked through the ceiling and ruined it. I went to my backup, the 2123 until I was able to switch printheads and put the 1123 back in service. I always like to have a working backup, as old stuff can fail. I bought the 1123 new about 30 years ago, the others were all used. I don't believe I got a setup disk with the 2023. Nothing in the instruction book said anything about being able to turn off the paper sensor from software, but if it's possible I'd like to know. The 1123 book told me exactly how to do it on the front panel.

The 1123 book also mentioned that its paper sensor is under the platen. If the 2023 sensor is also there, does anyone know the best way to get to it? Or if it's elsewhere, how to get to it?

Or if anyone has a working Panasonic kx-p1123 or kx-p2123 they want to sell cheap, I'd buy it (I'm in Illinois. Probably don't want to ship one from overseas and need 110 volt, not 220). There were several as-is on e-bay (I've all ready got non-working printers, I don't need more), 1 in England, and 1 or 2 pretty pricey ones.

You are right, I could eliminate some of the lines so it didn't need all 22 lines, but I want all 22 lines. the 1123 is usable and my 2123 works fine. I would just like to be able to use the 2023 (it uses the same ribbons as the 1123, and I have 3 cases of unopened ribbons for them). I can buy a working 1123 or 2123 on Ebay if I want to spend some real money, I was just hoping someone had a solution. I will probably disassemble the 2023 further until I find the sensor.

PS: I at one time used HP IIp+ laser printers (I had 2 working & 3 for parts) but I couldn't fix those myself & they kept failing so I went back to the dot matrix. Any printer that accepts a parallel interface, allows me to set it for condensed printing, will allow me to feed a 3 1/3 inch sheet of paper manually, and print 22 lines on it, that I can still get ribbons or toner cartridges for will work for me. I just have the Panasonics and they have worked well, and I have the ribbons. But I can buy ribbons for the 2123, or some other printer if they're available.