Power Amplifier Fault Finding - Tait TB8100 Service Manual

8

Power Amplifier 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 in the PA. It does not provide any
information to allow fault finding down to component level, except for
replacing the RF power transistors. When the fault has been traced to a
particular board, the standard procedure is to discard the faulty board and fit
a new one.
The fault finding procedures provided in this chapter assume you are familiar
with the operation of the TB8100 Service Kit and Calibration Kit.
Figure 8.1 on page 130
boards and show how they are configured in different models.
the PA" on page 129
configuration of a PA from its product code.
Note
Unless otherwise noted, the instructions and illustrations in this
chapter refer to a 100W UHF (H-band) PA. However, the same
basic procedures and techniques apply to other models of PA.
and Figure 8.2 on page 131
explains how to identify the model and hardware
Power Amplifier Fault Finding
identify the individual
"Identifying
127