Sony GY-2120WD Maintenance Manual page 246

6-2. Command Description
c) All Check (Self-diagnosis command No. 51)
Enter "51" as a command number and press the ENTER key.
Command numbers 52 and 53 are checked automatically and continuously.
DIAGNOSTIC=>51
-------[ IF CPU ROM Check ]-------
Start OK
-------[ IF CPU RAM Check ]-------
Start OK
SYS CPU Test
DIAGNOSTIC=>_
In case that the check succeeds;
Message "IF CPU Test ******** OK ********" is displayed lastly.
In case that the check fails;
Refer to "In case that the check fails;" of the each corresponding command (number).
6-22
******** OK ********
GY-2120WD/WS