Hitachi IJ RX2 Service Manual page 99

[Procedure to add the option for RX2-B (change to EZJ127A board)]
With respect to the setting
of service maintenance
mode, refer to "2.1 Setting
of maintenance mode by
service personnel".
(1) Turn off the power and be sure not to supply the electric power to the wires connecting
to TB1.
(2) Remove the connectors and change to EZJ127A board. (Two fixing screws)
(3) Insert the connectors and perform the setting of SW1 and 2.
(4) Turn on the power.
(5) Input a special password for service maintenance mode on the select login user menu.
(6) Press "Option setup" button at the second page of the maintenance menu.
(7) Change the software option 20 "Standard communication B" to "Enable".
(8) Return to the user maintenance mode on the password protection menu.
3-24
Option setup
button