9 TROUBLESHOOTING

The following chart is designed to help you correct problems which are not equipment malfunctions.

If you are unable to locate the cause of a problem or solve it through the use of this chart, contact your nearest Icom Dealer or Service Center.

POWER SUPPLY

RECEIVE

PROBLEM

 

POSSIBLE CAUSE

SOLUTION

REF.

Power does not

come

DC power cable is improperly

Reconnect the power cable correctly.

p. 13

on when the [POWER]

connected.

 

 

switch is pushed.

 

 

 

 

 

 

Fuse is blown.

Check for the cause, then replace the

p. 56

 

 

 

fuse with a spare one.

 

 

 

 

(Fuses are installed in two places. One is

 

 

 

 

installed in the DC power cable and the

 

 

 

 

other is installed in the PA unit.

 

 

 

Battery is exhausted if you are using

Check the battery voltage with the

 

 

a 12 V battery as the power source.

[POWER] pushed IN.

 

No sound comes

from

Volume level is set too low.

Rotate [AF] clockwise to obtain a suit-

p. 1

the speaker.

 

 

able listening level.

 

 

 

The squelch is closed.

Rotate [SQL] counterclockwise to

p. 1

 

 

 

open the squelch.

 

 

 

The transceiver is in the transmitting

Release [PTT] on the microphone or

 

 

condition.

check the SEND line of an external

 

 

 

 

unit, if connected.

 

 

 

An external speaker or headphones

Check the external speaker or head-

p. 12

 

 

are connected.

phone plug connection.

 

 

 

 

Check the speaker ON/OFF switch or

p. 12

 

 

 

speaker A/B switch, when an optional

 

 

 

 

SP-20EXTERNAL SPEAKER is in use.

 

 

 

 

 

 

Sensitivity is low.

 

The antenna is not connected properly.

Reconnect to the antenna connector.

 

 

The antenna feed line is cut or shorted.

Check the feed line and correct any

 

 

 

 

improper conditions.

 

 

The antenna for another band is

Select an antenna suitable for the

p. 14

 

 

selected.

operating frequency.

 

 

 

 

Make sure that [ANT1] is used for

 

 

 

 

frequencies less than 60 MHz and

 

 

 

 

[ANT2] is used for frequencies of 60

 

 

 

 

MHz and above.

 

 

 

The antenna is not properly tuned.

Push [TUNE] to manually tune the

pgs. 27,

 

 

 

antenna.

28

 

 

The attenuator function is activated.

Push [ATT] to turn the function OFF.

p. 21

 

 

 

 

Receive audio is distor-

The operating mode is not selected

Select a suitable operating mode.

p. 19

ted.

 

correctly.

 

 

 

 

The [SHIFT] control is set off-center.

Set [SHIFT] to the center position.

p. 20

 

 

 

 

Receive signal is distor-

Noise blanker function is activated.

Push [NB] to turn the function OFF.

p. 21

ted with strong signals.

 

 

 

 

 

Preamp is activated.

Push [P.AMP] to turn the function

p. 21

 

 

 

OFF.

 

 

 

 

 

 

57

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Icom IC-706MKIIG, I706MKTMG instruction manual Troubleshooting, Power Supply Receive Problem Possible Cause Solution

I706MKTMG, IC-706MKIIG specifications

The Icom IC-706MKIIG and the Icom IC-706MKTMG are two prominent transceiver models known for their compact design and versatile capabilities. These radios cater to amateur radio enthusiasts, providing a wide range of features suitable for both HF and VHF/UHF operations.

The IC-706MKIIG is a well-regarded dual-band transceiver that operates on HF frequencies from 160 meters to 10 meters and VHF/UHF from 6 meters to 70 centimeters. One of its main features is its compact footprint, making it an excellent choice for mobile operations as well as fixed installation. The transceiver provides up to 100 watts of output power on HF and 50 watts for VHF/UHF, ensuring robust performance for various amateur applications.

On the other hand, the IC-706MKTMG brings the same foundational performance but includes enhanced features aimed at improving user experience. It boasts a high-resolution LCD display with clear visibility under varying light conditions. This model offers advanced digital signal processing (DSP) technology, enhancing audio clarity and reducing noise interference. The built-in auto notch filter and noise blanker efficiently eliminate unwanted signals, allowing users to focus on their desired contacts without distraction.

Both models support multiple modes of operation, including SSB, CW, AM, and FM, which provides versatility in how users can communicate. They feature an easy-to-navigate menu system, allowing users to access settings quickly. With built-in memories and a large number of program settings, operators can customize their experience and quickly switch between configurations.

One standout feature of the IC-706 series is its built-in antenna tuner, which helps match the transceiver to various antenna types, optimizing performance and simplifying setup. The radios also include support for external control via CAT commands, accommodating advanced integration into larger station setups.

In terms of user connectivity, both transceivers come equipped with USB ports and support sound card capabilities, enabling digital modes such as PSK31 and RTTY easily. This integration enhances versatility, catering to modern digital communications alongside traditional voice modes.

Robust, reliable, and feature-rich, the Icom IC-706MKIIG and IC-706MKTMG models stand out as exemplary choices for amateur operators looking for a compact yet comprehensive transceiver solution. Their combination of technologies and characteristics continues to make them popular in the ham radio community.