Kenwood TM-V7A instruction manual Troubleshooting, Problem Probable Cause Corrective Action

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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: When 2 frequencies are received in the same band and these frequencies have relationships per the equation below or other similar relationships, an internal heterodyne may be heard. This is not a defect.

VHF/UHF mode: (UHF receive frequency – 45.05 MHz) x 2 – (VHF receive frequency + 38.85 MHz) x 4 = 38.85 MHz or 45.05 MHz (UHF receive frequency – 45.05 MHz) – (VHF receive frequency + 38.85 MHz) x 2 = 38.85 MHz

VHF/VHF mode: (VHF receive frequency on the UHF band + 45.05 MHz) x 5 – (VHF receive frequency on the VHF band + 38.85 MHz) x 5 = 38.85 MHz or 45.05 MHz (VHF receive frequency on the UHF band + 45.05 MHz) x 4 – (VHF receive frequency on the VHF band + 38.85 MHz) x 4 = 38.85 MHz

(VHF receive frequency on the VHF band + 38.85 MHz) – (VHF receive frequency on the UHF band + 45.05 MHz) x 0.75 = 38.85 MHz

UHF/UHF mode: (UHF receive frequency on the VHF band – 38.85 MHz) x 3 – (UHF receive frequency on the UHF band – 45.05 MHz) x 3 = 38.85 MHz or 45.05 MHz (UHF receive frequency on the VHF band – 38.85 MHz) x 4 – (UHF receive frequency on the UHF band – 45.05 MHz) x 4 = 38.85 MHz or 45.05 MHz

Problem	Probable Cause		Corrective Action	Page
				Ref.
The transceiver will not	1 The power cable was connected	1	Connect the supplied DC power cable	3, 4
power up after connecting	backwards.		correctly:
a 13.8 V DC power supply			Red ➞ ( + ); Black ➞ ( – ).
and pressing the PWR	2 One or more of the power cable	2	Look for the cause of the blown fuse(s).	5
switch. Nothing appears
	fuses are open.		After inspecting and correcting any
on the display.
			problems, install a new fuse(s) with the
			same ratings.
	3 The front panel was not connected	3	Separate the front panel from the main	84
	securely to the main unit of the		unit by using the release switch on the
	transceiver.		rear of the front panel, then lock the front
			panel securely to the main unit by using
			the same switch.
	4 The connectorized cable was not	4	Connect the connectorized cable correctly.	3, 4
	correctly connected.
			Continued

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