Park Air Systems Limited B63300HS User Manual
T6T 300 Watt VHF Transmitter
Page 108
Maintenance
Removing and Refitting the PSU Regulation Module
The PSU Regulation module is located as shown in
The PSU Regulation module is located as shown in
. A module removal diagram is shown in
Dangerous voltage is present within the T6T VHF amplifier. 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.
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 amplifier is isolated from the
ac and dc input supplies. Disconnect the drive assembly cables at CN5 and CN8. Disconnect the
antenna cable to the Combiner. Then proceed as follows:
ac and dc input supplies. Disconnect the drive assembly cables at CN5 and CN8. Disconnect the
antenna cable to the Combiner. 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 amplifier mainframe.
secure the module to the amplifier mainframe.
(3)
Carefully raise the module to gain access to the module connectors.
(4)
Disconnect the following connectors:
❑
CN6 6-way connector (6-way to 10-way loom to Combiner BIT module CN12)
❑
CN4 14-way connector (14-way ribbon cable to Interface module CN6)
❑
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.
Refitting
To refit the PSU Regulation module, proceed as follows:
(1)
While holding the module in position, connect the following connectors:
❑
CN1 4-way connector (part of loom to Combiner BIT module CN7)
❑
CN2 2-way connector (part of loom to Combiner BIT module CN7)
❑
CN7 3-way connector (3-wire loom to rear panel On/Off switch)
❑
CN3 3-way connector (part of loom to Combiner BIT module CN7)
❑
CN4 14-way connector (14-way ribbon cable to Interface module CN6)
❑
CN6 6-way connector (6-way to 10-way loom to Combiner BIT module CN12).
(2)
Locate the module in position. Ensure no wires are trapped by the module.
(3)
Secure the module to the amplifier mainframe using the three M3 x 8 mm captive washer screws
removed during disassembly.
removed during disassembly.
(4)
Connect the drive assembly cables at CN5 and CN8. Connect the antenna cable to the
Combiner.
Combiner.
WARNING
Dangerous Voltage