T6T VHF 100 W Transmitter
Page 17
Maintenance
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(5)
Remove the six M3 nuts that secure the Combiner BIT module PCB to the stud spacers. Also
remove the two M3 x 8 mm panhead screws that secure the Combiner BIT module heatsink to
the lower PA heatsink. The Combiner BIT module can now be removed.
Refitting
(1)
Place the Combiner BIT module in place on the stud spacers and replace the six washers and
nuts but do not tighten. Take care that cables are dressed properly and that none are trapped.
Replace the two screws that secure the Combiner BIT module to the PA heatsink, but do not
tighten.
(2)
Turn the unit over and replace the six countersunk M3 x 6 mm screws. Tighten these and return
to the other side to tighten the six nuts and two screws.
(3)
All 22 connectors removed earlier can now be reconnected. Refer to
Fig 6
and
Fig 7,
if
necessary.
(4)
Re-establish the ac and/or dc supplies.
(5)
Switch power on at the radio using the rear mounted Power switch.
(6)
Ensure the front panel Ready indicator is lit and the Alarm indicator is unlit.
(7)
Carry out the Calibrate routine using the Virtual Front Panel (VFP), as detailed in the procedure
To Calibrate the Transmitter on page 26.
(8)
Carry out a BIT interruptive test as detailed in the procedure
To Initiate a BIT Test on page 5
.
(9)
Set the rear panel Power switch to Standby and remove the VFP connector. Isolate the
transmitter from the ac and/or dc supplies.
(10) Refit the transmitter top and bottom covers. The transmitter can now be returned to service.
Summary of Contents for T6T
Page 1: ...T6T VHF 100 W Transmitter User Documentation ...
Page 10: ...Back to Transmitter Main Page Intentionally Blank ...
Page 54: ...Back to Transmitter Main Page Intentionally Blank ...
Page 115: ...Back to Transmitter Main Page Fig 13 PA Modules Removal and Refitting Detail PA 1 PA 2 ...
Page 118: ...Back to Transmitter Main Page Intentionally Blank ...
