Park Air Systems T6T, User Documentation

Page: 89 / 118

T6T VHF 100 W Transmitter Page 11 Maintenance
Back to Transmitter
Main Page
(11) Carry out the Calibrate routine using the Virtual Front Panel (VFP), as detailed in the procedure
To Calibrate the Transmitter on page 26 .
(12) Carry out a BIT interruptive test as detailed in the procedure To Initiate a BIT Test on page 5.
(13) Set the transmitter internal reference frequency by carrying out the procedure detailed on
page 3.
(14) Set the rear panel Power switch to Standby and remove the VFP connector. Isolate the
transmitter from the ac and/or dc supplies.
(15) Refit the transmitter top cover. The transmitter can now be returned to service.
Removing and Refitting the PSU Regulator Module
The PSU Regulation module is located as shown in Fig 5 . A module removal diagram is shown in Fig 9 .
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 PSU Regulation module, 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 PSU Regulation module and remove the three M3 x 8 mm captive washer screws that
secure the module to the transmitter 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)
❑
CN6 6-way connector (6-way loom to Combiner BIT module CN12)
❑
CN4 14-way connector (14-way ribbon cable to Processor module CN3)
❑
CN3 3-way connector (part of loom to Combiner BIT module CN7)
❑
CN7 3-way connector (3-wire loom to rear panel On/Off switch)
❑
CN2 2-way connector (part of loom to Combiner BIT module CN7)
❑
CN1 4-way connector (part of loom to Combiner BIT module CN7)
(5) Remove the module from the chassis.
WARNING Dangerous Voltages