Illegible Characters On The Terminal; Troubleshooting Power Modules; Troubleshooting The Psr320-A And The Psr320; Troubleshooting The Psr650-A And The Psr650 - 3Com S7906E Getting Started Manual

Illegible Characters on the Terminal

If the configuration terminal displays illegible characters, configuration of parameters on the terminal
might be incorrect. In this case, check the configuration according to the correct one listed in section
"No Display on the

Troubleshooting Power Modules

Troubleshooting the PSR320-A and the PSR320-D
The power modules PSR320-A and PSR320-D each have only one power LED.
1) When the power LED is in green, the power module works normally.
2) When the power LED is in red, the power module is faulty. It is possible that
The power output is abnormal.
The power module is overheated.
The power module fan is faulty.
3) When the power LED is OFF, the power supply of the system is faulty.
In this case, check whether:
The power switch is turned on.
The power cable is properly connected.
The voltage is correct.
On the SRPUs, there are also LEDs indicating the working status of the power modules. For details,
refer to related description about the power LEDs in Chapter 1 "Product Overview".
Troubleshooting the PSR650-A and the PSR650-D
Refer to section

Troubleshooting PSR1400-A

The power module PSR1400-A has three status LEDs, which indicate the input and output statuses of
the power module and the working status of the power module fan, respectively.
Table 7-1 describes the colors and working status of the three LEDs in different cases.
Table 7-1 Description of LEDs on the PSR1400-A
Case
The power module is
connected but the power
switch is turned off.
The power module is
connected and the power
switch is turned on.
There is a short circuit,
over-current, or over voltage
on the output circuit.
Terminal" on page 7-1.
"Troubleshooting the PSR650-A and the
LED
INPUT
OUTPUT
FAN
INPUT
OUTPUT
FAN
INPUT
OUTPUT
FAN
PSR650-D" on page 7-2.
Color
Green The power input is normal.
Red No power is output.
Red The power module fan does not rotate.
Green The power input is normal.
Green The power output is normal.
Green The power module fan works normally.
Green The power input is normal.
The power module goes into the
Red
self-protection state.
Green The power module fan works normally.
7-2
Status