E7405A-03
SERVICE NOTE
SUPERSEDES: NONE
E4401B, E4402B, E4403B,
E4404B, E4405B, E4407B,
E4408B, and E4411B
ESA Spectrum Analyzer family.
Also
E7401A, E7402A, E7403A,
E7404A, and E7405A
EMC Pre-Compliance Analyzers.
Serial Numbers/Duplicate Service Notes: See Below
The front panel flex circuits within this serial range can grow dendrites
under certain environmental conditions, which can ultimately short out
traces causing the front panel keys on the analyzer not to function.
ESA Spectrum Analyzer Serial Numbers:
E4401B-04: US39010101 / US39440459 No Exceptions.
E4402B-04: US39010101 / US39441060 Exceptions: S39441057
E4403B-03: US39010101 / US39440540 No Exceptions.
E4404B-03: US39010101 / US39440540 Exceptions:
US39440526, US39440527, US39440528
E4405B-03: US39010101 / US39440354 No Exceptions.
E4407B-03: US39010101 / US39440941 No Exceptions.
E4408B-03: US39010101 / US39440369 Exceptions: US39440367
E4411B-04: US39010101 / US39441107 No Exceptions. Continued
DATE: May 20 00
ADMINISTRATIVE INFORMATION
SERVICE NOTE CLASSIFICATION:
MODIFICATION RECOMMENDED
ACTION
CATEGORY:
LOCATION
CATEGORY:
AVAILABILITY: PRODUCT’S SUPPORT LIFE AGILENT RESPONSIBLE UNTIL: End of GMS period
IMMEDIATELY
ON SPECIFIED FAILURE
AGREEABLE TIME
CUSTOMER INSTALLABLE
ON-SITE
SERVICE CENTER
STANDARDS:
LABOR 1.0 Hours
SERVICE
INVENTORY:
RETURN
SCRAP
SEE TEXT
USED
PARTS:
RETURN
SCRAP
SEE TEXT
AUTHOR: BD ENTITY: 5320 ADDITIONAL INFORMATION:
© 2000 AGILENT TECHNOLOGIES
PRINT ED IN U. S.A.
1 of 2
Page 2 Service Note E7405A-03
EMC Pre-Compliance Analyzer Serial Numbers:
E7401A-03: US39110101 / US39440310
E7402A-03: US39110101 / US39440175
E7403A-03: US39110101 / US39440132
E7404A-03: US39110101 / US39440120
E7405A-03: US39110101 / US39440174
To Be Performed By: Agilen t Se r vic e Centers Only
Parts Required:
P/N Description Quantity
E4401-60198 Flex Circuit 1
Situation:
The front panel flex circuits that are green in co lor can gr ow de ndrites, which can ul timately short
out traces causing the front panel keys not to function. The "green" circuits utilize silv er w hich
can cause this de ndr ite gr owth. The new "copper" colored flex c ir c uits utilize copper/nickel/gold
plating which perfo rms ve r y we ll under various environmental condit ions .
Solutio n / A ction:
Agilent Ser vice Centers should replace the f le x ci rcuits if the instru me nt se r ia l f al ls within the
specified range . Ano ther me thod would be to look at the co lor of the existing flex circuit. All
green flex circuits are suspect and should be replaced. Se rv ic e Cente r pe rs onne l should refer to
the ESA Service Guide for prope r insta ll ation of the f le x circui t.
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