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http://web.casio.com/ecr/app/

Quick Start Guide

1. To set memory protection bat-

teries

To prevent losing all your settings and sales data, we 

strongly recommend that you set the memory protection 

batteries before you use the cash register and replace 

them at least once a year.

1.  

Remove the printer cover by lifting it up.

2.  

Remove the battery compartment cover. 

3.  

Note the (+) and (–) markings in the battery compart-

ment. Load a set of two new “AA” type alkaline 

batteries so that their plus (+) and minus (–) ends are 

facing as indicated by the markings. 

4.  

Replace the battery compartment cover and the 

printer cover.

Important: 

These batteries protect information stored in your 

cash register’s memory when there is a power 

failure or when you unplug the cash register. Be 

sure to install these batteries first.

Warning: 

No battery is included in the accessories.
Never try to recharge the batteries.
Do not expose batteries to direct heat, let them 

become shorted or try to take them apart.
Keep batteries out of the reach of small children. 

If your child should swallow a battery, consult a 

physician immediately.
There is a risk of explosion if the batteries are 

replaced with improper type.

2. To set a paper roll

The following explains for setting roll paper used as 

receipts. If you wish to use the paper roll for journal (sales 

record), please see page E-17 of the user’s manual.

1.  

Open the platen arm by lifting it up.

Preparations

Note:

  Please follow the steps described below.

Electronic Cash Register SR-S500/SR-C550

Electronic Cash Register can 

be set by Smartphone Try it !

QSG240*E

Preparations

Note:

  Please follow the steps described below.

2.  

Ensuring the paper is being fed from the bottom of the 

roll, lower the roll into the space behind the printer. 

3.  

Put the leading end of the paper over the printer.

4.  

Close the platen arm slowly until it locks securely.

Please push the position marked [PUSH HERE].

Warning: 

Never touch the printer’s thermal head and the 

platen. 
Avoid the thermal paper from heat, humidity or 

direct sunlight. 

Keep your hands off the paper cutter to avoid injury.

platen arm

platen

paper cutter

thermal head

5.  

Replace the printer cover, passing the leading end of 

the paper through the cutter slot. Tear off the excess 

paper.

3. To turn the cash register on

1.  

Insert a Mode key that comes with the cash register in 

the Mode switch and turn it to 

OFF

 position.

PGM

2.  

Plug in the power cord into an AC outlet.

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