JVC EX-A1 Service Manual page 24

4.3.4 Confirming the version of unit and system firm and Region Code
(1) Push "STOP","Audio Power" and "10" on REMOCON at the same time, then push in the same way several times (Condition
:source DVD, NO DISC).
(2) Confirm FL indication changes as followings.
1.25 02
----------------------------- 1.25 02 : Version number of system micom
SC:
YYY
----------------------------- YYY : Version Number of DVD unit firm
UT:
DVD ZZ
----------------------------- ZZ : Area Code
W
NO DISC
Table of Region Code for each version
Area Code
J/C
1-24 (No.MB150)
Confirm this number is same as one written in the working standard supplied
by Product Engineering.
Confirm these numbers are same as ones written in the following table.
Video Rating Source
Signal Rating Frequency
NTSC AC120V, 60Hz
Audio Power
STOP
10 key
W : Region Code
FL indication of
Region Code
Area code in Test mode
JC
FL display
1