Motorola MVME2603-1121A, Installation And Use Manual

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Applying Power
2-4
2
Front Panel Indicators (DS1 - DS6)
There are six LEDs on the MVME2603/2604 front panel:
CHS
,
BFL
,
CPU
,
PCI
,
FUS
, and
SYS
.
❏ CHS
(DS1, yellow). Checkstop; driven by the MPC603/604
status lines on the MVME2603/2604. Lights when a halt
condition from the processor is detected.
❏ BFL
(DS2, yellow). Board Failure; lights when the
BRDFAIL
∗
signal line is active.
❏
CPU
(DS3, green). CPU activity; lights when the
DBB
∗ (Data
Bus Busy) signal line on the processor bus is active.
❏ PCI
(DS4, green). PCI activity; lights when the
IRDY
∗ (Initiator
Ready) signal line on the PCI bus is active. This indicates that
the PCI mezzanine (if installed) is active.
❏ FUS
(DS5, green). Fuse OK; lights when +5Vdc, +12Vdc, and
Ð12Vdc power is available from the base board to the
transition module and remote devices.
Note Because the
FUS
LED monitors the status of several
voltages on the MVME2603/2604, it does not directly
indicate the condition of any single fuse. If the LED
flickers or goes out, check all the fuses (polyswitches).
❏ SYS
(DS6, green). System Controller; lights when the
Universe ASIC in the MVME2603/2604 is the VMEbus
system controller.