Oki B721dn Reference

Install additional RAM to increase the memory 

capacity of your printer in cases such as if 

occur. Your printer supports 512 MB RAM.

Note

 Use only genuine Oki Data products. The performance 

cannot be guaranteed when other products are used.

 The static electricity may cause damage to the parts. 

Discharge the static electricity in your body by touching 

grounded metallic parts, etc. before work.

Memo

 For banner printing, installing additional memory is 

recommended.

1 

Turn off your printer, and then unplug all 

the cables from the printer.

Reference

"Turning Off the Power" P.29

2 

Open the access cover (1) on the right 

side of a printer.

1

3 

Loosen the screw to remove the metal 

plate (2).

2

4 

Make sure the LED (3) indicated by the 

arrow is unlit.  

If it is lit, wait until it turns off.

3

5 

Insert the additional RAM (4) into the 

printer.

Note

 Be careful of the orientation of the additional RAM. 

The additional RAM has small dents on its connector, 

4

6 

Insert the right side of the metal plate 

(2) into the printer, close it, then secure 

it by tightening the screw.

2

B721dn/B731dn/MPS5501 - Installing 

Additional RAM

ENGLISH - 1