6654A-03 S E R V I C E N O T E SUPERSEDES: NONE 6654A System DC Power Supply Serial Numbers: 3007A00101 / 3236A00900 Modification to reduce Radiated RFI when replacing A2 GPIB board. Duplicate Service Notes: 6651A-03 6652A-03 6653A-03 6654A-03 6655A-03 To Be Performed By: Agilent-Qualified Personnel Parts Required: Service Kit 5060-3589 Contains: 5060-3399 A2 GPIB PC Assy, SMT 9170-1497 Ferrite Core 5080-2168 Cable 1400-0493 Tie Wrap 1400-0528 Tie wrap mount Continued DATE: 30 November 1993 ADMINISTRATIVE INFORMATION SERVICE NOTE CLASSIFICATION: INFORMATION ONLY AUTHOR: ENTITY: DF 2100 ADDITIONAL INFORMATION: © 1993 AGILENT TECHNOLOGIES PRINTED IN U.S.A. 1 of 2 Page 2 Service Note 6654A-03 Situation: The A2 GPIB board has changed from a hole through pc assembly to Surface Mount. The new assembly 5060-3399 is a direct replacement for 5060-3317. When replacing the older assembly, a ferrite core has been added to the cable between the A2 GPIB board and the A1 Front Panel Board to insure the unit meets the radiated RFI specification. Solution/Action: Remove the top cover and replace the A2 pc assembly following the instructions in the service manual. Attach the ferrite core to the adhesive backed mount using the tie wrap. Remove the protective backing and mount this assembly to the back of the front chassis adjacent to the telephone style connector on the A1 front panel pc board. Remove and discard the cable connecting two board. Install the new cable passing it through the center of the ferrite core two times. If the unit already has one core, add the second core in parallel with the first.
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