Specifications

Chapter 4: Troubleshooting
Power Supply Troubleshooting
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The following table shows each LED, the type of fault it indicates, and what to do if
that LED indicator is illuminated.
LED Type of Fault What To Do
Group of 11 LEDs on Backplane Assembly
L-ACQ TEMP FAIL Over-temperature Go to “If the L-ACQ TEMP FAIL
or U-ACQ TEMP FAIL LED is Lit”
L-ACQ SUPPLY FAIL Under-voltage Replace channels 1 and 2
acquisition assembly (LOWER
ACQ)
FP SUPPLY FAIL Under-voltage Go to “If the FP SUPPLY FAIL
LED is Lit”
U-ACQ SUPPLY FAIL Under-voltage Replace channels 3 and 4
acquisition assembly (UPPER
ACQ)
FPGA SUPPLY FAIL Under-voltage Replace backplane assembly
NEG SUPPLY FAIL Under-voltage Replace backplane assembly
U-ACQ TEMP FAIL Over-temperature Go to “If the L-ACQ TEMP FAIL
or U-ACQ TEMP FAIL LED is Lit”
MAIN FAN FAIL Over-temperature Go to “If the MAIN FAN FAIL
LED is Lit”
PRED FAN FAIL Over-temperature Go to “If the PRED FAN FAIL
LED is Lit”
BP POL FAIL Under-voltage Replace backplane assembly
BULK SUPPLY FAIL Replace bulk supply
Group of 7 LEDs on Backplane Assembly
FPGA +1.2V Over-voltage Replace backplane assembly
FPGA +1.8V Over-voltage Replace backplane assembly
FPGA +2.5V Over-voltage Replace backplane assembly
+3.3V POL Over-voltage Replace backplane assembly
FPGA +3.3V Over-voltage Replace backplane assembly
+5V POL Over-voltage Replace backplane assembly
ADC_VDO POL Over-voltage Replace backplane assembly
LEDs on Each Acquisition Board
U1101 oV Over-voltage Replace acquisition assembly
U303L oV Over-voltage Replace acquisition assembly
U1600 oV Over-voltage Replace acquisition assembly
U1100 oV Over-voltage Replace acquisition assembly
U300 3.3V oV Over-voltage Replace acquisition assembly
U300 2.5V oV Over-voltage Replace acquisition assembly
U303R oV Over-voltage Replace acquisition assembly
U1601 oV Over-voltage Replace acquisition assembly