E3610A-02
SUPERSEDES: E3610A-01 with
publication date 26 August 1993
DATE: 24 September 1993
E3610A DC Power Supply
Serial Numbers:
3111K00101 / 3151K02863
KR22702864 / KR30704551
Duplicate Service Notes:
E3610A-02
E3611A-02
E3612A-02
Eliminate voltage transient above the output setting during turn-off
To Be Performed By: Agilent-Qualified Personnel
Parts Required:
Part No. Description
0180-4355 Capacitor, 470uF 50V
Situation:
Some of the power supplies have turn-off overshoot that exceeds the power supply output
setting. If this condition exists, it will occur when the power supply has a light load (output current less than 30 mA).
1 of 2
AUTHOR: NKP
ENTITY: Y300
© 1993 AGILENT TECHNOLOGIES
PRINTED IN U.S.A.
SERVICE NOTE
ADMINISTRATIVE INFORMATION
MODIFICATION RECOMMENDED
SERVICE NOTE CLASSIFICATION:
ACTION
CATEGORY:
LOCATION
CATEGORY:
CUSTOMER INSTALLABLE
ON-SITE
SERVICE CENTER
AGILENT RESPONSIBLE UNTIL: 28 February 1996
ADDITIONAL INFORMATION:
IMMEDIATELY
ON SPECIFIED FAILURE
AGREEABLE TIME
AVAILABILITY:
PRODUCT’S SUPPORT LIFE
RETURN
SCRAP
SEE TEXT
SERVICE
INVENTORY:
RETURN
SCRAP
SEE TEXT
USED
PARTS:
STANDARDS:
Labor 0.5 Hour
Continued
Page 2 Service Note E3610A-02
Solution/Action:
To determine if a particular power supply has “excess turn-off overshoot”, follow this
test sequence:
1. Connect the power supply to the ac power line.
2. Turn the power supply “on”.
3. Connect a DVM across the power supply output terminals (set the DVM to
continuously sample, rate should should be at least two samples per second).
4. Set the power supply output voltage to any value below half scale (no load
condition).
5. Observe the DVM readings of the power supply output when the supply is
switched to “off”.
6. If the readings increase after the power supply is switched “off” by more than 5%
then the power supply has “excess turn-off overshoot”.
“Excess turn-off overshoot” may be corrected by replacing C13 (P/N 0180-4085,
330uF 35V) with P/N 0180-4355 (470 uF 50V).
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