Agilent Technologies 66000A, Service Manual, Page: 12 / 53

12 Verification
POWER-ON Checkout
1. Connect the instrument to the power source and turn the front power switch to ON (1).
2. Listen to confirm the modules' fans are on.
The power supply undergoes a selftest when you turn it on. The power-on selftest sequence tests the microprocessor, GPIB
interface, and serial communications.
Selftest Sequence
3. All display digits and annunciators on the keyboard briefly turn on.
4. All front panel LEDs and annunciators on the modules briefly turn on.
5. The keyboard briefly displays the message:
6. The keyboard then displays the state of the addressed module.
Note
The information displayed on the keyboard assumes:
•
At least one power module is installed,
•
Factory default state still stored in location 0,
•
Frame mode switch on the back of the mainframe is set to MAIN ,
•
GPIB address of the mainframe is set to 5,
•
Module configuration switches set to factory default states (all OPEN).
In Case of Trouble
Note
In case of a module failure, the front panel will display an Error Code -Uxx. Refer to the Agilent Series
661xxA Service Manual for information on troubleshooting the dc power modules.
A problem exists in the mainframe when one of these conditions is observed during selftest: