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4: On-board troubleshooting
This chapter includes instructions for troubleshooting the EKE-Trainnet
®
MVB module
on board a train.
The following topics are covered in this chapter:
Before you begin
— Warnings
— Preparations
Normal situation
Error situations
— Yellow LED blinking or on
— Red LED on
— Red LED blinking
— No LEDs on or glowing very faintly
4.1 Before you begin
Read the following sections carefully before you start troubleshooting the MVB module.
4.1.1 Warnings
This section contains warnings you need to consider before and during the
troubleshooting of the MVB.
Never disconnect the MVB from a rack with active power, as this can
damage the MVB module or other modules in the system.
Electrostatic discharge can damage electronic circuits. Always handle the
module at a static free workstation. If this is not possible, ground yourself
using a wrist strap and a resistive connection cord.
When you remove and handle the module, always hold it by the front panel
or sides. Do not touch the board or any of the components on it.
Remember to handle the module with care even when you are removing a
defective module and sending it to maintenance.
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