Technical data

5-6 9050 Diagnostics
Overt em perature
• Turned on when CPU (slot one), or main power supply is in an overtemperature condition.
• Powered by IB voltage.
• When overtemperature occurs, stack power supply turns off main power supply and turns on
LED.
• LED on indicates power available to internal bias (uses IB to power LED).
• LED on indicates main power supply turned off ( + 5 volt LED off).
• LED on indicates stack power supply off (stack PS LED is off).
Stack Power Supply Board LED
Indicates when one of the stack power supply voltages is overvoltage or undervoltage.
LED on the I/O Board
• Turned on when the I/O card fails the self-test.
• Driven by the 110 board and not dependent on the boot loader.