To calculate 7-2=5 (for example) on a business calculator: 7 + (all positive entries are followed by the + key) 2 - (all negative entries are followed by the - key) * (The Total key, marked with a star or a T finishes the calculation.)
It seems strange to people who use handheld calculators, but this is how adding machines have worked since the days of hand-cranked adding machines. The subtotal key (marked with S or a diamond) prints the running total without clearing it back to zero.
Here is the manual link
Press CTRL+F Type in 'tax' top right, press Enter. Scroll through the 19 mentions, Number 3 shows it. Copied and pasted below, but it doesn't show symbol image. The first paragraph covers getting into setting mode and setting date and time, then comes 'Tax Rate'.
https://www.manuallib.com/download//SHARP-EL-1801PIII-OPERATION-MANUAL.PDF
GT • RATE SET GRAND TOTAL / RATE SETTING MODE SELECTOR: "GT": Grand Total "•": Neutral "RATE SET": To set the date, time, and tax rate, set this switch at the "RATE SET" position. Date: • Enter in the order of month, day and year, then press to complete the entry. • Use to separate month, day, and year. • When is pressed, the number entered is evaluated and displayed as "date" if the value is within the following range; "Error" is displayed otherwise, and the previously set date is restored. Month: 1 - 12; day: 1 - 31; Year: 2000 - 2099 (in 4 digits) or 00 - 99 (in 2 digits) Time: • Enter in the order of hour, minutes, then press to complete the entry. (There is no entry available for the seconds value. The clock starts at zero second.) • If the hour/minute digit is less than 10, it is not necessary to enter the first digit "0". • Use to separate hour and minute values. • When is pressed, the number entered is evaluated and displayed as "time" if the value is within the following range; "Error" is displayed otherwise, and the previously set time is restored. Hour: 0 - 23 (24-hour system for the hour entry), Minute: 0 - 59
Tax rate: • Press three times, enter the tax rate, followed by . • A maximum of 4 digits can be stored (decimal point is not counted as a digit). • Only one rate can be stored. If you enter a new rate, the previous rate will be cleared.
more here and videos
https://www.google.com/search?q=sharp+el-1801piii+set+tax+rate
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Just had this EXACT problem on a Sharp EL-9200C. I got the down arrow to go away and then the calculator functioned like normal. Here's how: I got a ball point pen and rapidly activated the reset button on the back, then rapidly pressing the CL key... probably about 45-50 times, but eventually it cleared all the memory out and the calc was able to boot up. This was after replacing the batteries multiple times and trying every key and every 2ndF key. I feel like the master of the universe now!
Sharp Global
https://global.sharp > pdf > ERR_Message_EN
PDF
002-500. An error occurred during the scan job. Execute the operation again. Also, check whether or not the account limit for the. Scan service is set. 003-311.
114 pages
Don't refill toner cartridges on professional business machines. In most cases it is against the terms of the lease, as there is a clause for the company to supply toner, and they know when toner cartridges are changed. Also the quality is different and may damage the machine.
PrintCopy .info
https://printcopy.info > brand=Sharp > model=MX7090
Causes: Scanner expansion PWB (ACU) (ACRE) ROM data error. An error occurs during firmware upgrading for some reasons. Remedy: Perform firmware upgrading again.
Question edited for clarity, add magic word.
Question moved from Misc category.
This says;
How do I reset my printer toner chip?
Press the tiny reset button located beside the chip and hold for 10 seconds. Depending on the brand and model of the cartridge, you may not need to hold the button for 10 seconds, but it won't harm the cartridge so do it anyway just to be safe.
Question edited for clarity.
Question moved from Misc to model category.
'Check Paper Tray' tells you to check the paper is the correct paper from that you are trying to print. Your Paper Tray has Letter size in it and Microsoft Word is set to A4 (or Legal). The 'Change Paper Tray' option is to remove the paper tray with Letter Size and replace it with A4 or tell the Printer to Print from Tray 2 (A4) rather than Tray 1 (Letter). Just need to change a setting on Printing software or on the machine itself.
To check the paper tray settings on a Sharp copier, you can:
Go to the Home screen and select the Trace Settings icon.
Select the Paper Trays.
Select the tray you want to check.
View the list of paper types for that tray.
You can also change the paper tray settings by going to Setting mode and selecting System Settings ? Copy Settings ? Initial Status Settings ? Paper Tray.
User Manual.
https://docs.aws.sharp.eu/om/34_ppc/AR5316E-5320E_OM_Online-Manual_GB.pdf
More here
https://www.google.com/search?q=sharp+ar+5320e+user+manual
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Press the red [C-CE] button twice, then the yellow [+TAX] button.
Then type in the Tax percentage. Press [+TAX] again and then the [C-CE] twice again.
This works for the EL-331A Calculator.
Question edited for clarity, full 'make model (what it is)'.
Question moved from Misc to a better category.
Try and reset it. Do a power reset first, Disconnect from the mains for an hour, press and hold any button the power button for 30 seconds and plug back in.
What OS does your computer have? I have found a site that claims to have the PCL6 drivers for Vista and Windows 7 (32-bit) and earlier versions of Windows. https://www.driveridentifier.com/scan/sharp-ar-m420u/download/1550221446/A13F4E2F524A4FE29DF6E43348CDEF86/LPTENUM%5CSHARPAR-M420U8CB4 . However, several of the drivers are listed as 3rd party and in the .rar format. (You need 7-Zip or a similar program to extract that archive.) If you have a recent version of Windows, the above driver packages won't help. Windows 10 and 11 require manufacturer signed 64-bit drivers.
I don't see an AR-M420 listed at https://global.sharp/restricted/print/select.html?view=2& . I tried several regions. It looks like the manufacturer stopped supporting the unit.
Unfortunately, this all-in-one printer will not interface with any wireless phone or gadget. (If it has a Fax function, it might let you daisy chain it to a landline wired phone.) I wish that I had better news for you.
Cindy Wells
A common cause of faded or faint printouts from your inkjet printer, is dried ink particles causing a blockage. The printheads on an ink cartridge can be become blocked if the printer is not used for a period of time, so it is recommended to print a few pages each month to maintain the print quality
