Service manual

Chapter 4
Service
Introduction This chapter contains service information for the Agilent E1351A, E1352A,
E1353A, E1357A, and E1358A FET Multiplexers. Also included are
trouble shooting, repair, and maintenance guidelines.
WARNING
Do not perform any of the service procedures shown unless
you are a qualified, service-trained technician and have read the
WARNINGS and CAUTIONS in Chapter 1.
Equipment
Required
Equipment required for module troubleshooting and repair is listed in
Table 1-1, Recommended Test Equipment. Any equipment that satisfies the
requirements given in the table may be substituted. To avoid damage to the
screw head slots, use a T8 Torx driver to remove the front panel handles.
Service Aids See Chapter 3 — Replaceable Parts for descriptions and locations of
Agilent E1351A, E1352A, E1353A, E1357A, and E1358A replaceable
parts. Service notes, manual updates, and service literature for the FET
Multiplexers may be available through Agilent Technologies. For
information, contact your nearest Agilent Technologies Sales and Service
Office.
FET Multiplexer
Description
The Agilent E1351A, E1352A, E1353A, E1357A, and E1358A all use a
common component assembly. The component assembly contains all the
FET switches and their associated protection circuitry. Each terminal block
configures the component assembly to the appropriate type of switch.
Figures 4-1 through 4-4 show a simplified switching diagram for each FET
Multiplexer.
The terminal card contains the model identification code and the installation
of the terminal card before applying mainframe power ensures that the type
of switch is correctly identified. Optionally, the model identification can be
set on the component assembly to allow it to be correctly identified without
a terminal card installed. The component module also contains jumpers that
place the internal +4.6 V strain gage excitation voltage on the terminal block
Service 4-1