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E4424B-05
S E R V I C E N O T E
Supersedes:
NONE
ESG “B” Signal Generator E4424B
Serial Numbers:
0000A0000 / 9999Z9999
ESG has dim display or no display due to inductors L601 or L602 improperly
soldered on motherboard assembly A14, P/N E4423-60035.
To Be Performed By: Agilent-Qualified Personnel or Customer
Parts Required:
P/N Description Qty.
NONE
Tools Equipment and Manuals Required:
ESG Family Signal Generators Service Guide
T-10 TORX screwdriver
T-15 TORX screwdriver
Soldering Tools
ADMINISTRATIVE INFORMATION
SERVICE NOTE CLASSIFICA TI ON:
MODIFIC ATION RECOMMENDED
ACTION [[]] IMMEDIATELY STANDARDS:
CATEGORY: [x] ON SPECIFIED FAILURE LABOR: 1.0 Hours
LOCATION [x] CUSTOMER INSTALLABLE SERVICE [[]] RETURN USED [[]] RETURN
CATEGORY: [x] ON-SITE INVENTORY: [[]] SCRAP PARTS: [x]SCRAP
[x] SERVICE CENTER [[]] SEE TEXT [[]] SEE TEXT
AVAILABILITY: PRODUCT’S SUPPORT LIFE AGILENT RESPONSIBLE UNTIL:
[[]] AGREEABLE TIME
AUTHOR: Kevin Bertlin PRODUCT LINE: PL15
ADDITIONAL INFORMATION:
© AGILENT TECHNOLOGIES, INC. 2002
PRINTED IN U.S.A.
April 29, 2002
Page 1 of 2
Page 2 of 2 E4424B-05
Situation:
The ESG-B Family of Signal Generators has been experiencing failures with the symptoms of “dark
display” or “no display”. This is due to poor soldering of inductors L601 and L602. A new build of
the motherboard that addresses this problem will not be done until March of 2002. Until this problem
was discovered, replacement of the motherboard was the corrective action taken.
Solution/Action:
The resolution plan consists of the following:
1. Repair on failure.
2. Prevent future occurrences of display errors by re-soldering the inductors L601 and L602.
Instructions to access the inducto rs:
Removal:
1. Remove the CPU/Motherboard Assembly A14. (Refer to “A14 CPU/Motherboard” replacement
procedure in Service Guide.)
Repair:
1. Locate and re-solder the wire-wound toroid inductors L601 and L602. They are located on the top
side of the motherboard, near the front panel edge, adjacent to the silkscreen designator “DS509”.
NOTE:
Take care not to damage the leads of the inductors. They are fragile and can be broken.
If damaged, the replacement part number is 9100-3922
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