44951501TH Rev.2
3-14
Oki Data CONFIDENTIAL
3. INSTALLATION
1. Turn off the printer and disconnect the power cord.
Turn off the printer by following the steps described under “Turning off the power” in
section 3.5.2.
Note!
• The printer or additional memory may fail if the power is switched off
without taking shutdown steps. Be sure to execute the shutdown menu.
• Installation of an additional memory with power on may cause a failure of
the printer.
2. Remove the connector cover.
Connector cover
Lock
3. Remove the printer cable.
Printer cable
(2) Installation of an additional memory (for C321/C331/C531)
A memory expansion board increases the memory capacity of the printer. A memory
expansion board should be added to the printer when an error message [Memory Overflow]
appears due to insufficient memory for complex data on the printer, or the error message
[Collating Error] appears in making collated sets of copies.
Additional memory
Model name
Memory capacity
None (standard)
256 MB(C531)
/128MB(C321/C331)
MEM256G
+256 MB
MEM512D
+512 MB
Note!
• Proper operation by use of an unspecified product cannot be guaranteed.
Be sure to use Oki product.
• Additional memory of 256 MB or more is recommended for long-sheet
printing.
• One memory slot is provided.
• Even in the power-off status, when the AC cord is connected, a part of
thecircuit is operated, therefore, make sure to unplug the cable.