Front Panel Indicators (Ds1 - Ds6); Table 3-3. Mvme2700 Leds - Motorola MVME2700 Series Installation And Use Manual

Functional Description
Front Panel Indicators (DS1 – DS6)
3
3-20
There are six LEDs on the MVME2700 front panel. The LEDs monitor the
status of the board as described below.

Table 3-3. MVME2700 LEDs

LED
CHS Checkstop; driven by the MPC750 status lines on the
(DS1, MVME2700. Lights when a halt condition from the processor
yellow) is detected. Should extinguish when the board is reset.
BFL
Board failure; lights when the BRDFAIL∗ signal line is active,
(DS2, indicating a fault is present on the MVME2700.
amber)
CPU
CPU activity; lights when the DBB∗ (Data Bus Busy) signal
(DS3, green) line on the MPC750 processor bus is active.
PCI
PCI activity; lights when the IRDY∗ (Initiator Ready) signal
(DS4, green) line on the PCI bus is active. Indicates that the PCI mezzanine
(if installed) is active
FUS
Fuse OK; lights when +5V DC, +12V DC, and –12V DC power
(DS5, green is available from the base board to the transition module and
remote devices.
SYS
System Controller; lights when the Universe II ASIC in the
(DS6, green) MVME2700 is functioning as VMEbus system controller.
Notes
1. At reset, a lamp test function illuminates all the LEDs.
2. Because the
FUS
MVME2700, it does not directly indicate the condition of any single
fuse. If the LED flickers or goes out, check all the fuses
(polyswitches).
Function
LED monitors the status of several voltages on the
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