Meridian Link/Customer Controlled Routing Installation And Upgrade Manual page 81

There are eight light-emitting diodes (LEDs) and two switches on the
faceplate of the SBC card, as illustrated in Figure 17.
The LEDs show the following conditions:
¥ This red LED is continuously lit when a hardware or
Fail indicator
software failure occurs on the SBC. It is normal for this indicator to
flash while diagnostics are being run (after power-on or during
rebooting).
¥
Status indicator
signal goes low. When steadily lit, the LED indicates that the processor
has stopped.
¥ This green LED is lit when the microprocessor executes
Run indicator
a bus cycle. When applications are running, the LED is lit almost
continuously but flickers every few seconds.
¥
SCON indicator
the SBC card is the VME bus system controller.
¥ This green LED is lit when the LAN chip is the local
LAN indicator
bus master.
¥
+12 V indicator
transceiver interface.
¥
SCSI indicator
bus master.
¥
VME indicator
bus, or when the board is accessed by the VME bus.
The switches perform the following functions:
¥
ABORT switch
and returns control to the debugger. Do not press this switch. If you
accidentally press it, all software operations will stop and you will be in
the firmware debugger. In this case, press the red
immediately to reboot the system. Software diagnostics during system
boot will attempt to repair possible file system damage caused by the
nonstandard shutdown.
Meridian Link Release 5C/CCR Release 3C Installation and Upgrade Guide
Chapter 4: Meridian Link/CCR hardware 63
This yellow LED is lit when the MC68040 Status
This green LED is always steadily lit to indicate that
This green LED is lit when power is available to the
This green LED is lit when the SCSI chip is the local
This green LED is lit when the board is using the VME
This switch, when pressed, stops program execution
switch
RESET