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Monroe Calculator Model 3140 double spacing

The tape and print on my Monroe Calculator model 3140 (circa 1987) double spaces on each entry which is annoying and wasting paper. I have talked with Monroe and they want ''big bucks'' to fix the problem if I send it to them. Not likely worth the expense.

Is there anyone with the technical expertise to advise me on how adjust the ''spacing''?

Other than this I really like the calculator.

Thank you all......

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6 Suggested Answers

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Posted on Jan 02, 2017


SOURCE: Percentage button!!

The Casio MS-80TV requires you to input percentage calculations differently than other calculators. To calculate percentage change addition for this example, you must input "12000X20%+", for subtraction, you must input "12000x20%-".

Posted on Sep 27, 2007


SOURCE: ti83 plus calculator


You didn't mention how old the calculator was so let me give you a little information to aid you in making a decision. First...solid state electronics don't last forever but a calculator should last a long time if it is not dropped, immersed in water, etc. I have a programmable model that is over 25 years old. Having said that, if the model is still in warranty, that would be the logical solution. If not then you have three opportunities.....the bad meaning pitch it out if you have received fair value from it (I don't know when you purchased it), the expensive (probably more than it would cost to replace) meaning calling around and asking a TV shop (not a computer shop) if they would not mind taking a look at it (some might) or if you happen to know an electronics tech...or (and this works) giving a call to the local junior college and checking to see if the instructor in a basics class might like to fix it (you pay for parts) as a class project, lastly (and this can work) a letter to TI customer service if the product is less than 5 years old saying, "I'm not sure what the mean time between failures is but my son's xyz which I have enclosed failed after approximately xxx hours use. As I am on a limited budget I was wondering if it could be fixed." You might get a response...most folks in Texas are pretty nice and TI is interested in maintaining their reputation. This will cost you a couple of dollars in freight. You, if you check around, can find very inexpensive (very sophisticated) calculators. I would also point out that there are many very sophisticated calculators free on the internet (not quite as handy as you have to use a mouse or the keypad (with some, not all) if you have a computer or the work your son does is also requires a computer. Hope this helps....Tango

Posted on Jan 25, 2008

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SOURCE: Cracked 12c display

Have you looked on Ebay, check with office products dealers, most have what is called junkers just for this reason...

Posted on Jun 28, 2008

  • 1 Answer

SOURCE: loading paper tape

when you first get the calculator there is a black piece of plastic in the very back of the calculator printer with a sliver piece of metal under neath it. push the paper in between the black piece of plastic and the piece of metal and keep pushing feed. at first when i tried this it wouldn't work, but you have to push the paper hard without ruining the piece of paper
hopefully you understand this

and if you have any more questions just please ask

Posted on Jun 08, 2009

  • 5 Answers


Maybe you blew a fuse...Does it turn on? Call me at 608-222-2484...Ask for Milt,,will help you over the phone..

Posted on Oct 30, 2009

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