Agilent customer install a3 rev1 free download

File name customer_install_a3_rev1.pdf

!" Instructions to replace the A/D Converter and Inguard Logic Assembly (A3) These instructions are intended for the replacement of the A3 assembly in the 3458A that has been diagnosed with the short term drift problem described in Service Note 3458A-18. After completing the A3 assembly replacement the 3458A needs to be warmed up for 4 hours in its operating environment and an ACAL ALL initiated. The ACAL ALL will adjust the 3458A to its internal references and it will be ready to make accurate measurements. Where necessary, a DC Gain Adjustment may be required. (see 3458A Multimeter Calibration Manual P/N 03458-90017 on the Agilent web at: http://cp.literature.agilent.com/litweb/pdf/03458-90017.pdf) This document contains general precautions that should be utilized when the 3458A is opened for internal service procedures. WARNING Only personnel with knowledge of electronic circuitry and an awareness of the hazards involved should remove and install any printed circuit board assemblies. Caution: To prevent equipment circuit damage, always remove the AC line power cord before removing or replacing any assembly. To prevent electrostatic discharge (ESD) damage to ICs, always observe anti-static techniques when assemblies are handled or serviced. Static Handling Static electricity is a familiar phenomenon which, except for an occasional shock, doesn't seem very serious. However, it has been proven that in the electronics industry ESD is a major cause of component failure. In many cases, the component damaged may not immediately fai, causing low instrument reliability and future repairs. ESD damage can occur at static levels below human perception. It has also been shown that ESD can affect both passive and active devices. The following guidelines are the minimum requirements for static safe service environments: ! The workbench should be equipped with a conductive table mat. The mat should be grounded to earth ground through a 1 M ohm resistor. The mat should be equipped with at least one swivel connector for connecting wrist straps. ! All service and handling personnel should wear a conductive wrist strap in contact with bare skin. This strap should be connected to the swivel connector on the conductive table mat through a 1 M ohm resistor. ! All metal equipment at the workstation must be grounded. This includes soldering irons, solder removers, shelving and equipment stands. ! Only one common ground should be provided at the workstation. ! The workstation should be kept free of nonconductors. No common plastics, polybags, cardboards, cigarette or candy wrappers should be allowed. There should not be rugs or carpet on the floor, shelving or bench top. ! Only proper containers should be used for shipping, storing, or transporting