ER-A411, ER-A421 (serv.man5). ER-A411 421 Instruction Manual - Sharp ECR User Guide / Operation Manual. Page 3

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Thank you very much for your purchase of the SHARP Electronic Cash Register, Model ER-A411/ER-A421.
Please read this manual carefully before operating your machine in order to gain full understanding of 
functions and features.
Please keep this manual for future reference. It will help you if you encounter any operational problems.

• Install the cash register in a location not subject to direct sunlight, unusual temperature changes, high 

humidity or splashing water.  
Installation in such locations could cause damage to the cabinet and the electronic components.

• Never install the register in saline areas (e.g.: close to the sea).

Installing the register in such locations could cause component failure with the corrosion.

• Never operate the register with wet hands.  

The water could seep into the interior of the register and cause component failure.

• When cleaning your register, use a dry, soft cloth.  Never use solvents, such as benzine and/or thinner. 

The use of such chemicals will lead to discoloration or deterioration of the cabinet.

• The register plugs into any standard wall outlet (offi cial (nominal) voltage). 

Other electrical devices on the same electrical circuit could cause the register to malfunction.

• If the register malfunctions, call your authorized SHARP dealer for service - do not try to repair the register 

yourself.

• For complete electrical disconnection, disconnect the main plug.

This register has a built-in memory protection circuit which is operated by a rechargeable battery pack. It 
should be known that all batteries will, in time, dissipate their charge even if not used. Therefore to insure an 
adequate initial charge in the protection circuit and to prevent any possible loss of memory upon installation, 
it is recommended that each unit be allowed to be recharged for a period of 24 to 48 hours prior to use by 
the customer.
In order to charge the battery pack, the machine must be plugged in. This recharging precaution can prevent 
unnecessary initial service calls.
The battery pack is a consumable part, and its operating time will get shorter gradually each time it is 
recharged for memory backup.
When the battery pack cannot be charged enough to perform memory backup, it means that the service life 
of the battery pack has expired.
If this is the case, consult your authorized SHARP dealer.

Caution Scanner connection
In order to allow a plug & play connection of the optional scanner the Pin 9 of the D-Sub connector 1 
(Channel 1) uses +5V.
Be very careful of this +5V in case connection of a different device should be done so that a damage of 
the register or device is avoided.