Power Management Unit Fault Finding - Tait TB8100 Service Manual

13

Power Management Unit Fault Finding

TB8100 Service Manual
© Tait Electronics Limited September 2006
This chapter provides enough fault finding information to allow you to trace
the fault to an individual board or card in the PMU. It does not provide any
information to allow fault finding down to component level. If the fault is
traced to the auxiliary power supply board or a plug-in card, the standard
procedure is to discard the faulty item and fit a new one. However, if the
fault is traced to the DC converter board or AC converter board, you must
replace the complete DC or AC module.
The fault finding procedures provided in this chapter assume you are familiar
with the operation of the TB8100 Service Kit and Calibration Kit.
Figure 13.1 on page 218
shows how they are configured in an AC and DC PMU.
PMU" on page 217 explains how to identify the model and hardware
configuration of a PMU from its product code.
Note
For the sake of simplicity and clarity, the instructions and illustra-
tions in this chapter refer to an AC and 12V DC PMU fitted with
an auxiliary power supply board. However, the same basic proce-
dures and techniques apply to other models of PMU.
identifies the individual boards and cards, and
Power Management Unit Fault Finding
"Identifying the
215