User`s guide

Troubleshooting Checklist
Troubleshooting 4-7
Table 4-4 Power System Troubleshooting
Possible Causes Instruction
Loss of Power to the
6C105 chassis.
Perform the following steps:
1. Check ON/OFF switches of 6C105 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 6C105 chassis power supplies. If power supply LEDs
or audible warning tone indicate power supply problems,
troubleshoot or replace any faulty power supplies.
Fault in 6C105 power
bus.
1. Remove the module from the current slot and re-install in
another free slot in the chassis.
2. If the module functions in the selected slot, the module onboard
power converter is operational. The 6C105 chassis power bus
may have a localized fault. Install the module in the working slot
and contact Cabletron Systems.
3. If the module 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.
Fault in the module
power converter.
1. Remove a working module from a known good chassis.
2. Install the module in the known good slot.
3. If the 6H203-24 or 6H253-13 does not function, there may be a
fault in the onboard power converter. Contact Cabletron Systems
immediately.