Replacing Fuses - TYT TH-7800 User Manual

Replacing Fuses

If the fuse blows, determine the cause then correct the problem. After the problem is resolved replace the fuse. If newly
installed fuses continue to blow, disconnect the power cable and contact your local dealer for assistance.
Fuse Location
Transceiver
Supplied Accessory DC power cable
Only use fuses of the specified type and rating otherwise the transceiver could be damaged.
Note: If you use the transceiver for a long period when the vehicle battery is not fully charged or when the engine is OFF,
the battery may become discharged and will not have sufficient reserves to start the vehicle. Avoid using the transceiver
in these conditions.
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Fuse Current Rating
15A
20A
Antenna Connection
Before operating install an efficient well-tuned antenna. The success of your installation will depend largely on the type of
antenna and its correct installation. The transceiver can give excellent results if the antenna system and its installation are
given careful attention.
Use a 50* impedance antenna and low-loss coaxial feed-line that has a characteristic impedance of 50*, to match the
transceiver input impedance. Coupling the antenna to the transceiver via feed-lines having a impedance other than 50*
reduces the efficiency of the antenna system and can cause interference to nearby broadcast TV receivers, radio receiv-
ers and other electronic equipment.
Note: Transmitting without first connecting an antenna or other matched load may damage the transceiver. Always conn-
ect the antenna to the transceiver before transmitting. All fixed stations should be equipped with a lightning arrester to re-
duce the risk of fire, electric shock and transceiver damage.
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