Cabletron Systems DLE52-MA User Manual page 61

Possible Causes
Loss of Power to
the DLM6C-AA
chassis.
Fault in DLM6C-AA
power bus.
Fault in DLE02-MA
and the DLE52-MA
module power
converter.
DLE02-MA/DLE52-MA User's Guide
Table 4-4 Power System Troubleshooting
Instruction
Perform the following steps:
1. Check ON/OFF switches of DLM6C-AA power
supplies. All switches must be in the ON ( | ) position.
2. Check all power cords and cables for proper
connection. Examine power cords for fraying or other
damage. Replace if necessary.
3. Examine DLM6C-AA chassis power supplies. If
power supply LEDs or audible warning tone indicate
power supply problems, troubleshoot or replace any
faulty power supplies.
1. Remove the DLE02-MA or the DLE52-MA from the
current slot and re-install in another free slot in the
chassis.
2. If the DLE02-MA and the DLE52-MA functions in the
selected slot, the DLE02-MA and the DLE52-MA
onboard power converter is operational. The
DLM6C-AA chassis power bus may have a localized
fault. Install the DLE02-MA or the DLE52-MA in the
working slot and then contact your DIGITAL
representative.
3. If the DLE02-MA and the DLE52-MA does not
function in the selected slot, continue the process
with all module slots in the chassis. If the module
does not function in any slot, the chassis power bus
may have a system-wide fault or the module onboard
power converter may be inoperable. Diagnose the
module power converter as described below to
isolate the fault.
1. Remove a working module from a known good
chassis.
2. Install the DLE02-MA or the DLE52-MA in the known
good slot.
3. If the DLE02-MA or the DLE52-MA does not
function, there may be a fault in the onboard power
converter. Contact your DIGITAL representative
immediately.
Troubleshooting Checklist
4-7