User's Manual Part 2

T6T 300 Watt VHF Transmitter Page 118 Maintenance
compatible operating and Fill software. Park Air keeps records of module software in all radios
supplied. Care must be taken when using a module removed from another radio as this module
may not have compatible software.
(11) Download the saved radio settings from file using the VFP. Alternatively, the settings can be
edited by hand as described in the Operation topic. Once entered, ensure the required settings
appear in the VFP screen.
(12) Carry out the Calibrate routine using the VFP, as detailed in the procedure To Calibrate the
Transmitter on page 130.
(13) Carry out a BIT interruptive test as detailed in the procedure To Initiate a BIT Test on page 102.
(14) Set the drive assembly internal reference frequency by carrying out the procedure detailed on
page 100.
(15) Set the rear panel Supply switch to Standby and remove the VFP connector. Isolate the drive
assembly from the ac and/or dc supplies.
(16) Refit the drive assembly top cover. The drive assembly can now be returned to service.
Removing and Refitting the PSU Regulation Module
The PSU Regulation module is located as shown in Fig 44. A module removal diagram is shown in
Fig 47.
Dangerous voltage is present within the drive assembly. 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 PSU Regulation module, ensure that the drive assembly is isolated from
the ac and dc input supplies. Disconnect the six Amplifier Out connectors, CN1 to CN6. Then proceed
as follows:
(1) Remove the drive assembly top cover as described on page 116.
(2) Locate the PSU Regulation module and remove the three M3 x 8 mm captive washer screws that
secure the module to the drive assembly mainframe.
(3) Carefully raise the module to gain access to the module connectors.
(4) Disconnect the following connectors:
❑ CN5 10-way connector (10-way ribbon cable to PA Control module)
❑ CN6 6-way connector (2-way loom to power supply)
❑ CN4 14-way connector (14-way ribbon cable to Processor module)
❑ CN7 3-way connector (3-wire loom to rear panel On/Off switch)
❑ CN2 2-way connector (2-wire loom from dc input connector on rear panel)
❑ CN1 4-way connector (4-wire cable from power supply)
❑ CN3 3-way connector (3-wire loom from Drive module)
❑ CN9 2-way connector (2-wire cable ac input to power supply)
❑ CN8 3-way connector (2-wire loom to rear panel ac input connector plus chassis connection).
WARNING Dangerous Voltage