User's Manual Part 2

T6T 300 Watt VHF Transmitter Page 122 Maintenance
(3) Remove the eight M3 x 8 mm captive washer screws that secure the module to the drive
assembly mainframe.
(4) Remove the module from the chassis.
Refitting
To refit the PA Control module, proceed as follows:
(1) Place the module in position. Ensure no wires are trapped by the module.
(2) Fit the eight M3 x 8 mm captive washer screws, previously removed, that secure the module to
the drive assembly mainframe.
(3) Refit the following connectors to the module:
❑ CN2 6-way connector (6-wire loom to Drive module CN10)
❑ CN4 SMB connector (forward power sense to Drive module CN9)
❑ CN3 SMB connector (RF drive to Drive module CN7)
❑ CN5 SMB connector (reference frequency at front panel)
❑ CN6 10-way connector (10-way ribbon cable to PSU Regulation module)
❑ CN1 50-way connector (50-way ribbon cable to Processor module).
(4) Re-connect the six Amplifier Out connectors, CN1 to CN6.
(5) Re-establish the ac and/or dc supplies.
(6) Switch power on at the radio using the rear mounted Supply switch.
(7) Ensure the front panel Ready indicator is lit and the Alarm indicator is unlit.
(8) Carry out the Calibrate routine using the Virtual Front Panel (VFP), as detailed in the procedure
To Calibrate the Transmitter on page 130.
(9) Carry out a BIT interruptive test as detailed in the procedure To Initiate a BIT Test on page 102.
(10) Set the drive assembly internal reference frequency by carrying out the procedure detailed on
page 100.
(11) Remove the VFP connector and switch power to Standby using the rear mounted Supply switch.
Isolate the drive assembly from the ac and/or dc supplies.
(12) Refit the drive assembly bottom cover. The drive assembly can now be returned to service.