Service and Maintenance 6 
Agilent U1602B/U1604B User’s and Service Guide  127
Cleaning
If the instrument requires cleaning, ensure you follow the instructions 
below:
• Remove power from the instrument
• Clean the external surfaces of the instrument with a soft, lint- free and 
slightly damped cloth.
• Make sure that the instrument is completely dry before reconnecting it 
to a power source. 
Diassemble is not required or recommended for cleaning.
Basic Troubleshooting Hints
This section provides hints and suggestions for solving general problems 
that you may encounter with the instrument. It guides you on what to 
check in the following situations:
•If there is no display
✔ Check the power switch at the front panel is on.
✔ Check the battery condition. Charge the battery if the battery is 
exhausted.
✔ Contact Agilent Technologies Service Center to obtain technical 
assistance, if necessary.