Sony BKDM-3020 Maintenance Manual page 30

1-8. Switch Settings on Boards and LEDs Description
Status code
MSB
1-22 (E)
Operating state
(Example) Boot program version V1.30
Application program version V1.50
MSB
Time
Indicates that the WKG-13 board is in operating failure.
In this case, replace the board with a new one.
(For the replacement procedures, refer to the section 2-6.)
LSB
LSB
System debugging
Boot V 1.30
No display
Application
V 1.50
System debugging
Version number