Sony BCU-100 Maintenance Manual page 48

Message LED / Error LED
When an error occurs or a warning state is established, the Message LED on the front panel and the Error
LED "1" (D107/KY-631 board) inside the front panel light or blink as follows.
When the Message LED blinks, remove the front panel and check the details of the Error LED "1".
Status Message LED
*1
Warning Blinks blue
Error *2 Blinks red
*1 : The status where an error of low urgency, such as a drop in the fan rotation rate, or the warning for the replacement time is detected.
*2 : The status where an error of high urgency, such as a power supply failure or temperature rise is detected and the BCU-100 is shut
down.
Status LED
The lighting pattern of the LEDs corresponds to the error code, which enables you to identify the status.
When an abnormality is detected and error LED "1" inside the front panel lights in red or blinks in red,
four status LEDs from "2" to "5" (D108 to D111/KY-631 board) lights as follows.
Error code "1"
(Error LED)
1 Light / Blink
2 Light / Blink
3 Light / Blink
4 Light / Blink
5 Light / Blink
6 Light / Blink
7 Light / Blink
8 Light / Blink
9 Light / Blink
A Light / Blink
B Light / Blink
C Light / Blink
D Light / Blink
E Light / Blink
F Light / Blink
Note: When LED "1" is unlit (normal operation), all the LEDs from "2" to "5" light up. However, when the unit starts in the backup mode
with dip switch (S102/KY-631 board) No. 1 (S102-1) inside the front panel turned ON, all the LEDs from "2" to "5" blink while LED
"1" stays unlit.
1-40 (E)
Error LED "1"
Blinks red
Lights red
"2" to "5" Possible cause
(Status LED)
2 3 4 5
The hardware has a problem.
2 3 4 5
The hardware has a problem.
2 3 4 5
Not used
2 3 4 5
The fan has a problem.
2 3 4 5
The temperature has risen.
2 3 4 5
The power supply has a problem.
2 3 4 5
Action around the Cell/B.E. chip on the BE-28 board
has a problem.
2 3 4 5
Action around the RSX chip on the BE-28 board has
a problem.
2 3 4 5
Not used
2 3 4 5
Not used
2 3 4 5
Not used
2 3 4 5
Not used
2 3 4 5
The lithium battery on the BE-28 board has a problem.
2 3 4 5 The system control has a problem.
2 3 4 5
The system control is operating in backup mode.
BCU-100 MM