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I am trying to put in a new date in a er a420 but i cant see an @ key do you know what i should do

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You're using the USA manual to program a non USA version. Use the X button in place of @

Posted on Apr 23, 2015

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Posted on Jan 02, 2017

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SOURCE: I have sharp er-a420 it was in my garage for two

Most Sharp register, including the ER-A420, have a rechargeable battery mounted inside to hold all memory when the power goes out. It should last a few months, but two years is a bit much. This might get it going:

  1. Unplug from AC POWER.
  2. Turn the key to PGM.
  3. Hold down both paper feed keys (at top-left of keyboard).
  4. While holding those two buttons down, plug the power back in.
  5. Turn the key back to REG.
  6. Enter 1 CASH # to sign on as Cashier 1.
  7. Try a sale.
There is a strong chance this won't do the job, because the memory has been randomized by total loss of power when the battery died. Worse yet, the battery may be too far gone to ever take a solid charge again. If so, you probably need the help of a Sharp register dealer to replace the battery, totally clear all memory and reprogram it. It's probably worth the money; the -420 is an excellent little register.

Posted on Dec 24, 2009

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Here is the manual for the ER-A410 and ER-A420

http://www.cbspos.com/usermanuals/ERA410_ERA420UIB.pdf

it is a PDF file so you will need an Adobe PDF reader to open it.

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I have a sharp ER-A420 which has had the keyboard modified from the standard layout, is there anyway of resetting it to factory default layout without a SVC key?


the best i could do is find a service manual, I did find an article where they tell you how to do a master reset but you need a svc key. so good luck with this sir http://www.skan.com/manuals/A420/ERA410-420-SRV.pdf

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1 Answer

I have sharp er-a420 it was in my garage for two years. I like to reprogram my register. I think I need to reset my register, I do not know how. Manager?s key does not do anything. When I plug it in on the...


Most Sharp register, including the ER-A420, have a rechargeable battery mounted inside to hold all memory when the power goes out. It should last a few months, but two years is a bit much. This might get it going:
  1. Unplug from AC POWER.
  2. Turn the key to PGM.
  3. Hold down both paper feed keys (at top-left of keyboard).
  4. While holding those two buttons down, plug the power back in.
  5. Turn the key back to REG.
  6. Enter 1 CASH # to sign on as Cashier 1.
  7. Try a sale.
There is a strong chance this won't do the job, because the memory has been randomized by total loss of power when the battery died. Worse yet, the battery may be too far gone to ever take a solid charge again. If so, you probably need the help of a Sharp register dealer to replace the battery, totally clear all memory and reprogram it. It's probably worth the money; the -420 is an excellent little register.

Dec 10, 2009 | Sharp XE-A402 Electronic Cash Register

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