T6T VHF 100 W Transmitter
Page 9
Maintenance
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Main Page
Top and Bottom Covers
One of the top cover screws is covered with a warranty label that should not be tampered with unless
Park Air Customer Support has advised otherwise. When authorisation has been made the following
procedures should be followed.
To remove the top cover, locate and unscrew the 19 countersunk screws securing the top cover to the
mainframe. Access can then be gained to the Processor module and PSU Regulation module.
To remove the bottom cover, locate and unscrew the 15 countersunk screws securing the bottom cover
to the mainframe. Access can then be gained to the PA Control module.
The following modules require both top and bottom covers to be removed:
❑
Power Supply modules
❑
Combiner BIT module
❑
PA modules
❑
Front Panel assembly PCB.
Removing and Refitting the Processor Module
The Processor module is located as shown in
Fig 5
. A module removal diagram is shown in
Fig 8
.
Dangerous voltages are present within the transmitter. Care must be taken by personnel to
avoid accidental contact with exposed circuitry when the covers are removed and power is
applied to the radio.
Removal
Before attempting to remove the Processor module, and if possible, save the radio settings. Connect a
PC with the VFP software loaded to the radio using the PC to Radio Interconnection Lead (Park Air part
number 17E12600001). With the VFP software active, upload the radio settings to a specified file.
Ensure that the transmitter is isolated from the ac and dc input supplies. Then proceed as follows:
(1)
Unscrew the 19 countersunk screws and remove the transmitter top cover.
(2)
Locate the Processor module and disconnect the following connectors (
Fig 8
):
❑
CN1 50-way connector (50-way ribbon cable from PA Control module CN1)
❑
CN3 14-way connector (14-way ribbon cable from PSU Regulator module CN4)
❑
CN4 34-way connector (34-way ribbon cable from Front Panel module CN1).
(3)
Gain access to the rear of the transmitter. Using a 5 mm nut spinner tool, remove the four
screwloc 8 mm-4-40 UNC stud spacers that secure the Processor module interface connectors
CN5 and CN6 to the rear panel.
(4)
Remove the seven M3 x 8 mm screws that secure the module to the transmitter mainframe.
(5)
Remove the module from the chassis.
WARNING Dangerous Voltages
Summary of Contents for T6T
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Page 115: ...Back to Transmitter Main Page Fig 13 PA Modules Removal and Refitting Detail PA 1 PA 2 ...
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