E4401B-04
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 dendri tes
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 / US3944 04 59 No Exceptions.
E4402B-04: US39010101 / US39441060 Exceptions: S39441057
E4403B-03: US39010101 / US3944 05 40 No Exceptions.
E4404B-03: US39010101 / US39 44 05 40 Exceptions:
US39440526, US39440527, US39440528
E4405B-03: US39010101 / US3944 03 54 No Exceptions.
E4407B-03: US39010101 / US3944 09 41 No Exceptions.
E4408B-03: US39010101 / US3944 03 69 Exceptions: US39 44 03 67
E4411B-04: US39010101 / US3944 11 07 No Exceptions. Continued
DATE: May 2000
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
PRINTED IN U.S.A.
1 of 2
Page 2 Service Note E4401B-04
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: Agilent Service Centers Only
Parts Required:
P/N Description Quantity
E4401-60198 Flex Circuit 1
Situation:
The front panel flex circuits that are green in color can grow dendrites, which can ultimately short
out traces causing the front panel keys not to function. The "green" circuits utilize silver which
can cause this den dr it e growt h. Th e ne w "cop pe r" co lored flex circuits ut il iz e co pp er /n ic ke l/ go ld
plating which perfo rms ver y wel l unde r va ri ou s en vi ro nme nt al con di tion s.
Solution / Actio n :
Agilent Service Centers should replace the flex circuits if the instrument serial falls within the
specified rang e. Anot he r m eth o d wou ld be to loo k at the col or of th e ex is ting flex circuit. All
green flex circuit s ar e su sp ec t an d sh ould be replaced . Ser vi ce Cent er per so nn el sho ul d re fe r to
the ESA Servic e G ui de for proper installa ti on of th e fl ex circuit.
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