TC Communications TC3400, Руководство пользователя, Страница: 29 / 31

- 29 -
Alarm condition will occur whenever there is no Ethernet signal detected at the RJ-45 port on the rear panel
of the unit. A second alarm condition will occur whenever the unit is in a diagnostic mode. Under normal
operation, the red Alarm LEDs should be off.
If no LEDs are lit on the unit, check the DC power supply, connector plug, and/or power source. If the
"PWRA" or "PWRB" LEDs still do not light, check the fuses on the suspect board. The TC3420s each have
a pair of fuses on the boards. These fuses are designated as "F1" and "F2". The user may verify the fuse
status by disconnecting power from the unit and performing a simple continuity check for each fuse on the
suspect board(s).
If the problem still persists, contact the Technical Support Department at TC Communications, Inc. at (949)
852-1973.