Sharp AR-M355N Quick Reference Manual page 24

Flash ROM Version Up (Firmware ROM Upgrade) Procedures (cont'd)
DIP Switches
Note: When updating the ROM, the DIP switches on the back of the
machine must be set properly. Follow the Setting the DIP Switches
procedure below.
Setting the DIP Switches
1. Remove the screw marked with an asterisk (*) from the Controller
PWB at the back of the machine and rotate the plate part to access
the DIP switches. See illustration.
Note: There are two DIP switches on the Controller: the Diag Mode
Switch (on the left) and the Write Protect Switch (on the right).
The switches are set to the Protect mode (switches are in the Up
position) during normal operation. Protect mode is the default. In
order to write to the ROM, the switches must be changed to the
down position (Diag Mode). This releases the write protection.
2. Upon completion of the upgrade procedure, remember to return
the switches to the Up position (Write Protect), and then rotate the
plate back over the DIP switches to the original position, and
tighten down the screw.
Quick Reference Guide: AR-M355N/M455N
Flash ROM (cont'd)
24