Sony HCD-GX90D Service Manual page 103

6. VERSION INFORMATION
On the Test Mode Menu screen, selecting
version and region code.
The parenthesized hexadecimal number in version field is checksum
value of ROM.
## Version Information ##
IF con. Ver.x. xx
SYScon. Ver.x. xx
Model
Region
Config
Front End Ver.x.xx
IF con. : The version of system controller (IC901).
SYScon. : The version of DVD system processor (IC206).
Front End: The version of mechanism controller (IC301).
7. VIDEO LEVEL ADJUSTMENT
On the Test Mode Menu screen, selecting
for video level adjustment. During display of color bars, OSD
disappears but the menu screen will be restored if pressing the
[RETURN]
key.
[6]
displays the ROM
(xxxx)
MHC-xxxx
0x
xxxxxxxx
Exit: RETURN
[7]
displays color bars
HCD-GX90D/RV800D
9