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E4419B-12
S E R V I C E N O T E
Supersedes:
NONE
Agilent E4419B EPM Average Power Meter
Serial Numbers: GB41293595/GB41293804
Latent Defect Causes Calibrator To Fail Built In Self Test
To Be Performed By: A g ilent-Q ua lified P ersonne l o r Customer
Parts Required:
P/N Description Qty.
E4418-60031 Processor Board Kit 1
ADMINISTRATIVE INFORMATION
SERVICE NOTE CLASSIFICATION:
ACTION [[]] IMMEDIATELY STANDARDS:
CATEGORY: X ON SPECIFIED FAILURE LABOR: 1.0 Hours
[[]] AGREEABLE TIME
LOCATION X CUSTOMER INSTALLABLE SERVICE [[]] RETURN USED [[]] RETURN
CATEGORY: [[]] ON-SITE INVENTORY: [[]] SCRAP PARTS: [[]] SCRAP
X SERVICE CENTER X SEE TEXT X SEE TEXT
AVAILABILITY: PRODUCT’S SUPPORT LIFE AGILENT RESPONSIBLE UNTIL: 20-Feb-2005
AUTHOR: FC PRODUCT LINE: PN
ADDITIONAL INFORMATION: Service Inventory has been inspected and is unaffected. Service Centers will return Used Parts
via the standard BOP process.
© AGILENT TECHNOLOGIES, INC. 2003
PRINTED IN U.S.A.
February 21, 2003
MODIFICATION RECOMMENDED
Page 1 of 2
Page 2 of 2 E4419B-12
Situation:
A batch defect with component Q11 on the Processor Board assembly has been identified. This
component is a transistor within the power reference oscillator circuit.
If a Processor Board assembly has been fitted with a defective Q11, it will fail the built in self test
(BIST), highlighting an issue with the "Calibrator" test.
Important note - as BIST is an integr al part of the manufac tur ing test str ategy, Agilent is confide nt tha t
no units have been knowingly shipped with this defect. Although there is no evidence to suggest that
the defect may manifest itself a t some la ter da te, th is service n ote has been created to cover such a
possibility.
Solution/Action:
If any of the units listed above are received at the service center and are exhibiting this fault, then
perform the following procedure:
• Remove and replace the Processor Board, as per the installation note supplied with the kit.
• Update the details stored on the Processor Board to reflect the identity of the power meter. Details
of this procedure can be found in the installation note.
• Ensure the Processor Board is programmed with the current firmware revision. The firmware and
a PC based download utility are available as no-charge downloads from the 'Agilent.com' website.
The following URL provides a shortcut to the power meter & sensor product pages:
http://www.agilent.com/find/powermeters
• Verify that all of the Built In Self Test tests pass.
• Verify that the 1mW reference power level meets the published specification. Details of this
procedure can be found in the Service Manual.
• The repair and verification process is now complete.
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