Output Board; Onboard Regulators; Fixed Supply; Floating Supplies - HP 8114A Service Manual

HP 8114A
Service Guide

Output Board

Some parts of this board consist of data-controlled devices and
troubleshooting is reduced to replacing suspect devices. Other parts of
use
the board SMT. However, basic checks can be performed on some
parts of the circuitry:
Note I
To make measurements on the output board the hybrid module
guiding shield has to be removed.
Warning Floating voltages up to + 145 V are present. This can be
dangerous to life. Care should therefore be taken during the
measurements.
Check
the power supplies re-generated on the output board.
At TP109 there should be + 5 VANA measured against AGND at Cl 19

Floating Supplies

Measure the floating voltages against floating ground (FLGND). FLGND
can be accessed at TP106.