Digital Equipment DECrepeater 90FS, Руководство по установке и настройке

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48 DECrepeater 90FS Installation and Configuration
Problem Solving Using the LEDs
When diagnosing a problem with the module, note that the problem is often indicated
by the states of the module LEDs. Table 3 lists the states of the LEDs for various error
conditions that can occur during initial installation of the device, along with probable
causes and corrective actions to take.
Normal Powerup
When power to the module is initially turned on, the following events occur:
1. The Power LED lights and stays lit. All other LEDs light for a few seconds,
then turn off. This verifies that the individual LEDs are operational (defective
LEDs do not light.
2. The module initiates its built-in self-test.
3. After the successful completion of self-test (within 1 minute), the
Module OK LED lights, and remains lit.
4. The remaining LEDs indicate their operational status.
Table 3 Problem Solving Using the LEDs
Symptom Icon Probable Cause Corrective Action
All LEDs
are off. The module does
not have power. If the module is installed as a standa-
lone unit:
Secure the power cable at the back
cover and between the power supply
and the wall outlet.
Check the wall outlet using another
appliance or light, or plug the power
cord into another outlet. If no power is
available, check the wall outlet’s circuit
breaker.
If the problem persists, replace the
power supply or the module.
If the module is installed into either the
DEChub 900 or the DEChub 90:
Reseat the module.
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