TSR 2800-20-DC Router’s Hardware Installation Manual
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Chapter 5 Hardware Fault Analysis
The part describes how to remove the fault from the router.
5.1 Fault Separation
The key for resolving the systematic faults is to separate the fault from the system. You
can compare what the system is doing with what the system should do to detect the
fault. You need to check the following subsystems:
z
Power source and cable
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Port, cable and connection—ports on the front template of the router and the
cables connecting these ports
5.1.1 Faults Relative with Power and Cooling System
Do the following checkups to help remove the fault:
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The on-off of the power source is opened.
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If the router is too hot, check whether the air outlet and air inlet are clean and
then do relative operations in section “Requirements for Common Locations”.
The working temperature of the router is from 0 to 40 Celsius degrees.
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If the router cannot be started but the LED indicator is on, check the power.
5.1.2 Faults Relative with Port, Cable and Connection
Do the following checkups to help remove the fault:
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Check the cable if the router cannot find the port.
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If the power on-off is at the “ON” location, check the power source and the
power cable.
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If the console port does not work after the system is started up, check whether
the console port is set to a baud rate of 9600 bps, eight data bits, no sum check
bit and one stop bit.
5.2 LED Description
The LED indicator shows that the router is running. The following table shows the
LEDs of TSR 2800-20-DC router and their description:
No. Abbrev.
Name
Remarks
1 ACT Ethernet 10/100M data It flickers when data is received on the
