1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

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

88

Page 93 Page 95
Page 94
Image 94
Kenwood TM-V7A instruction manual Troubleshooting, Problem Probable Cause Corrective Action
Page 93 Page 95

TM-V7A specifications

The Kenwood TM-V7A is a sophisticated dual-band transceiver that has garnered the attention of amateur radio enthusiasts worldwide. Designed for VHF and UHF operations, it offers a plethora of features that enhance communication capabilities and provide a robust user experience.

One of the standout characteristics of the TM-V7A is its dual-vfo (variable frequency oscillator) configuration, which allows users to monitor two frequencies simultaneously. This feature is particularly useful for coordinating communications across different bands or for listening to two channels at once. The large, bright LCD display provides clear visibility of the operating frequency, with the ability to monitor a wealth of information, including received signal strength and battery voltage.

The TM-V7A supports a wide range of operating modes, including FM, AM, and SSB, making it versatile enough for different communication needs. The device is compatible with CTCSS (Continuous Tone-Coded Squelch System) and DCS (Digital-Coded Squelch), which adds significant convenience for group communications by reducing unwanted noise and interference.

Another important feature is its built-in APRS (Automatic Packet Reporting System) functionality. This allows operators to transmit their position automatically and share information with other APRS users. The built-in GPS capability enhances this feature, providing accurate location tracking that can be particularly beneficial during emergency response situations or for outdoor events.

For enhanced audio quality, the TM-V7A is equipped with a high-performance audio filter and variable bandwidth control. This allows operators to tailor the audio output based on the conditions of the band and personal preferences, improving clarity and intelligibility during conversations.

The transceiver is also designed with user-friendly navigation. The intuitive menu system enables easy access to settings and configurations, allowing operators of all experience levels to operate the radio effectively. Customization options further enhance user experience, with programmable memories allowing operators to save frequently used frequencies and settings.

The Kenwood TM-V7A’s rugged build quality ensures durability, making it suitable for both home and field operations. Its compact design allows for easy installation in vehicles or portable setups, making it an excellent choice for both casual users and serious amateur radio operators. Overall, the Kenwood TM-V7A stands out as a feature-rich transceiver capable of meeting the diverse needs of the amateur radio community, combining advanced technology with practical functionality.
Top Page Image Contents