2 Service56 Keysight 53147A/148A/149A Assembly Level Service GuideIntroductionThis chapter provides service information for your Keysight 53147A/148A/149A. Itis divided into four major sections:– “Returning the Instrument to Keysight Technologies for Service”(page 57). This section provides you with step-by-step instructions on how toreturn the instrument for service.– “Calibration Procedures” (page 59). This section provides step-by-stepprocedures for calibrating the Keysight 53147A/148A/149A.– “Pre-Troubleshooting Information” (page 76). This section provides you withpertinent information such as safety considerations, recommended testequipment, repair and after-service considerations, and assemblyidentification and location.– “Troubleshooting the Instrument” (page 81). This section provides you withtroubleshooting procedures that isolate the faulty assembly or module.Replacement and recalibration of most modules can only be performed at anauthorized Keysight Technologies Service Center.If the instrument is under warranty, return it to Keysight for service. Refer to“Returning the Instrument to Keysight Technologies for Service” on page 57. Ifyou decide to troubleshoot the instrument yourself, refer to the section titled“Troubleshooting the Instrument” on page 81.
