Agilent HP 8904A Service Notes 2 free download

File name HP 8904A Service Notes 2.pdf

8904A-05 S E R V I C E N O T E SUPERSEDES: None 8904A Multifunction Synthesizer Procedure For Restoring RAM Data Parts Required: None Situation: The A2 Digital Assembly in the 8904A Multifunction Synthesizer contains RAM memory that requires battery backup. If the battery fails, the contents of RAM will be lost which will cause the unit to fail on power up. To prevent this from occurring, it is very important to have your customer replace the battery in the 8904A every five years by carefully fol- lowing the battery replacement procedure described in the 8904A Service Manual, P/N 08904-90008. Failure to correctly follow the battery replacement procedure could also interrupt the contents of RAM, causing an 8904A failure. If a battery failure occurs, use the following procedure to restore RAM data on the A2 assembly. This procedure can only be performed by a qualified Agilent Service Center. After the battery is replaced, apply a generic adhesive label to the 8904A rear panel with "Replace Battery MM-YY" on it, where MM (month) YY (year) is today's date plus 5 years. For example, if a battery was replaced 10-93 the label should read "Replace Battery 10-98". Continued DATE: 24 September 1993 ADMINISTRATIVE INFORMATION SERVICE NOTE CLASSIFICATION: INFORMATION ONLY AUTHOR: ENTITY: ADDITIONAL INFORMATION: LHL 1000