6 Service and Maintenance  
126 Agilent U1602B/U1604B User’s and Service Guide 
Returning instrument to Agilent Technologies for service 
Before shipping your instrument for repair or replacement, Agilent 
recommends that you acquire the shipping instructions from the Agilent 
Technologies Service Center. A clear understanding of the shipping 
instructions is necessary to secure your product for shipment. 
1 Write the following information on a tag and if attach to the 
instrument.
• Name and address of owner
• Instrument model number
• Instrument serial number
• Description of the service required or failure indications
2 Remove all accessories from the instrument
Do not include accessories unless they are associated with the failure 
symptoms.
3 Protect the instrument by wrapping it in plastic or heavy paper.
4 Pack the instrument in foam or other shock absorbing material and 
place it in a strong shipping container.
You are recommended to use the original shipping material or order 
materials from an Agilent Technologies Sales Office. If both options are 
not available, place 8 to 10 cm (3 to 4 inches) of shock- absorbing and 
static- free packaging material around the instrument to avoid movement 
during shipping. 
5 Seal the shipping container securely.
6 Mark the shipping container as FRAGILE.
In the ensuing correspondence, refer to the instrument by its model 
number and full serial number.
Agilent suggests that you always insure your shipments.