Keysight 1143A, User'S And Service Manual

Page: 47 / 56

Schematic Diagrams
Schematics are provided for the 1143A Probe Offset Control and Power
Module which is component-level repairable. Schematics for the power and
control assembly are sequentially numbered in the figure title at the bottom
of the page. Schematic numbers are used to cross reference signal
connections between the schematics.
On schematic 3 is a table showing the power connections, power grounds,
and nonfunctional pins of ICs (integrated circuits). This helps avoid
nonfunctional clutter on the schematic and gives one place to show IC power
connections when IC sections are split between schematics.
Unless otherwise noted, the following component values apply:
•
Resistance is in ohms.
•
Capacitance is in microfarads.
•
Inductance is in microhenries.
Symbols on schematics are based on current ANSI and IEEE standards.
Additional schematic symbols are shown below:
Tool-aided adjustment
Test point with measurement aid
Connection through machine screw
The component locator table and locator drawing for the power and control
assembly are on pages 42 and 43, respectively.
Service
Troubleshooting and Repair
47