Sony KD-43X7 F Series Service Manual page 135

4.15 Option Bit
1) Go to "Option bit" and Press "Enter" or ""
button
2) Select the option available "Shipping region" or "Tuner ID" by pressing "↑" or "↓". Then press ">" or " Enter".
Option Purpose
To select the Shipping region of the Set.
Shipping
Please don't change this setting unless for
region
service board replacement .
To select the Tuner type of the Set. Please
don't change this setting unless for service
Tuner ID
board replacement .
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SYS SET