Specifications

13-5

Troubleshooting

Volt/Temp Troubleshooting

The VOLT/TEMP indicator on the Agilent 70843 is lit when one of the following

conditions occur:

• A low line voltage is applied to the Agilent 70843.

• The temperature inside the Agilent 70843 is > 55

Use the following procedure to determine the cause of the fault:

1. Power down the system and disconnect the mains power cable from the Agilent 70843.

2. Check that the line input voltage is within specification.

NOTE If the voltage increases to within the normal operating range, the

Agilent 70843 will restart itself.

If the input line voltage is correct, suspect excessive ambient temperature inside the

Agilent 70843.

3. Check that the fan is operating correctly by checking the air flow at the fan-intake

openings.

NOTE It is recommended that the fan filters be regularly cleaned, as a build

up of dust on the filters will reduce the airflow into the Agilent 70843.

If the temperature decreases to within the normal operating range, the

Agilent 70843 will restart itself.

If all the above are good then the Agilent 70843 is faulty.