Troubleshooting Tools
16 Product Manual
2.5 Ethernet DSQC 336
Designation Colour Description/Remedy
TxD Yellow Indicates data transmit activity.
If no light when transmission is
expected, check error messages and
check also system boards in rack.
RxD Yellow Indicates data receive activity.
If no light, check network and
connections.
NS Green/red See section 2.14.
MS Green/red See section 2.14.
F Red Lit after reset. Thereafter controlled
by the CPU.
Light without message on display
indicates a hardware fault preventing
system from strating.
By light and message on display, check
message.
DSQC
336
LAN
TXD RXD
CAN
NS MS
A
U
I
F
T
P
E
C
O
N
S
O
L
E
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