Circuit Board Connecting Links; Replacing The 6W Board; Figure 10.1 Circuit Board Connecting Links - Tait TB8100 Service Manual

10.1

Circuit Board Connecting Links

10.2

Replacing the 6W Board

Removal
180 Power Amplifier Board Replacement
There are two types of link used to connect individual boards in the PA:
b
RF links are used to carry RF signals from one board to another
c
bridging links are used to carry control signals from one board to
another.
Figure 10.1 shows typical examples of both types of links.
Figure 10.1 Circuit board connecting links
c
Important
There is heatsink compound between the board and the
heatsink under certain components. Any objects caught in
the heatsink compound underneath the board which pre-
vent effective heatsinking may cause these components to
fail.
Important
If you replace the 6W board, you must recalibrate the PA
bias using the Calibration Kit. Refer to the Calibration Kit
documentation for more details.
Refer to "Power Amplifier Disassembly and Reassembly" on page 173
details on removing and refitting the cover and front panel, and for screw
torque settings. The circled numbers in the following instructions refer to
Figure 10.2 on page 181.
The exact number and location of links may differ in other models.
1. Remove the cover and front panel.
2. Remove the bridging links
board.
b
Figure 10.2 shows a 50W UHF (H-band) PA.
b
connecting the board to the control
© Tait Electronics Limited September 2006
for
TB8100 Service Manual