Kenwood TS-480HX, TS-480SAT Troubleshooting, Problem Probable Cause Corrective Action

16 TROUBLESHOOTING

TROUBLESHOOTING

The problems described in this table are commonly encountered operational malfunctions. These types of difficulties are usually caused by improper hook-up, accidental incorrect control settings, or operator error due to incomplete programming. These problems are usually not caused by circuit failure. Please review this table, and the appropriate section(s) of this instruction manual, before assuming your transceiver is defective.

Note: Placing a powered portable transceiver near this transceiver may cause noise in the transceiver.

Problem			Probable Cause		Corrective Action	Page
						Ref.
The transceiver will not		1	DC power supply is OFF.	1	Switch ON the DC power supply.	18
power up after		2	Faulty power cable	2	Inspect the power cable. Confirm	2, 3
connecting a 13.8 V DC					polarities are correct.
power supply and					Red: positive (+); Black: negative (–)
pressing [	]. Nothing	3	The power cable is not connected	3	Confirm the connections to the DC	2, 3
appears on the display,			securely.		power supply are secure.
and no receiver noise is		4	Power cable fuse is open.	4	Look for the cause of the blown fuse.	5
heard.					After inspecting and correcting any
					problems, install a new fuse of the
					specified rating.
After switching ON the		1	The input voltage is outside 13.8 V	1	Correct the input voltage or use a 12 to	2, 3
power, the transceiver			DC ±15% (11.7 to 15.8 V DC).		16 V battery.
does not function		2	The microprocessor has	2	Review “MICROPROCESSOR	88
normally. For example,			malfunctioned.		RESET”. After understanding what
no digits or incorrect					data will be lost, do a Partial Reset. If
digits appear on the					the problem remains, do a Full Reset.
display.
After switching ON the		1	The current rating of the DC	1	Use the DC power supply that has	3
transceiver, the			power supply is too low.		20.5 A or more current rating.
transceiver refuses to		2	Two same DC power supplies	2	Connect 2 DC power supplies to the	3
transmit.			(20.5 A or more each) or a DC		TS-480HX transceiver. The voltage
			power supply that has 41 A more		difference between 2 DC power
			current capacity.		supplies must be within 1.0 V to
					transmit. Also, confirm each DC power
					supply has a 20.5 A or higher current
					rating. If a DC power supply that has
					41 A more current capacity, two same
					type of DC cables must be used.
The transceiver does		1	Procedures are not being	1	Review “WRITING CONVENTIONS	ii
not respond correctly			followed precisely.		FOLLOWED”.
after pressing key		2	The Frequency Lock function is	2	Press [MENU/ F.LOCK] (1 s) to switch	63
combinations or turning			ON.		the function OFF.
controls per instructions		3	The microprocessor and its	3	Review “MICROPROCESSOR	88
in this manual.			memory need resetting.		RESET”. After understanding what
					data will be lost, do a Partial Reset. If
					the problem remains, do a Full Reset.
The frequency cannot		The Frequency Lock function or		Press [MENU/ F.LOCK] (1 s) to turn the		63
be changed.		Lock All function is ON.		Frequency Lock function OFF. The “ ”
				icon disappears.
SSB audio quality is		1	The wrong operation mode is	1	Select USB or LSB for the mode.	19
very poor; the high or			selected for the receiver.
low audio frequencies		2	The AF DSP filter is incorrectly	2	Press [FIL/ NAR] then turn the MULTI	46
are absent.			set.		control to adjust the DSP filter width.
		3	Noise Reduction 1 or 2 is ON.	3	Press [NR] until the NR function turns	47
					OFF.
		4	Beat Cancel 1 or 2 is ON.	4	Press [BC/ CW.T] until the BC function	47
					turns OFF.

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