TROUBLESHOOTING

The problems described in the following tables 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 these tables and the appropriate section(s) of this instruction manual before assuming your transceiver is defective.

Problem

Probable Cause

 

 

 

Corrective Action

Page Ref.

The transceiver will not

1 The power cable was

1

Connect the supplied DC power cable

3

power up after connecting

connected backwards.

 

correctly:

 

a 13.8 V DC power supply

 

 

Red ( + ); Black ( Ð ).

 

and pressing the [

 

]

2 One or more of the power

2

Look for the cause of the blown fuse(s).

5

 

 

(Power) switch. Nothing

cable fuses are open.

 

After inspecting and correcting any

 

appears on the display.

 

 

 

 

problems, install a new fuse(s) with the

 

 

 

 

 

 

 

 

 

 

 

 

same ratings.

 

 

 

 

 

 

 

 

 

The display is too dim,

The supply voltage is too low.

The supply voltage requirement is

3, 4

even though you selected

 

13.8 V DC ±15% (11.7 V to 15.8 V DC).

 

a high brightness level.

 

If the input voltage is outside this range,

 

 

 

 

 

adjust your regulated power supply and/or

 

 

 

 

 

check all power cable connections.

 

 

 

 

 

 

 

 

 

The frequency cannot be

Memory Recall was selected.

Press [VFO].

30, 15

selected by turning the

 

 

 

 

 

 

Tuning control or by

 

 

 

 

 

 

pressing Mic [UP]/[DWN].

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Most buttons/keys and the

1 One of the Lock functions is

1

Unlock all of the Lock functions.

53,58,64

Tuning control do not

ON.

 

 

 

 

 

function.

2 The transceiver is in Channel

2

With the transceiver power OFF, press

37

 

 

 

Display mode.

 

[

 

] (Power) + [REV] to exit Channel

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Display mode.

 

 

 

 

 

 

 

 

 

 

14

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Kenwood TM-271A, TM-271E instruction manual Troubleshooting, Display mode

TM-271A, TM-271E specifications

The Kenwood TM-271A and TM-271E are robust dual-band transceivers designed for amateur radio enthusiasts looking for reliability, functionality, and ease of use. Both models operate in the VHF and UHF bands, specifically covering 144-148 MHz and 430-450 MHz, respectively. This versatility allows users to communicate across varied frequencies, making them suitable for a wide range of applications, from casual conversations to emergency communications.

One of the standout features of the TM-271A and TM-271E is their compact size, making them an ideal choice for mobile operations. Despite their small footprint, these radios pack a punch with a maximum transmit power of 50 watts in the VHF band and 35 watts in the UHF band. This power output ensures clear and effective communication over long distances, essential for outdoor activities and emergency situations.

The user-friendly interface of the TM-271 models includes a large, backlit LCD display, which provides clear visibility in various lighting conditions. The controls are intuitively arranged, allowing users to navigate functions with ease. Moreover, both models come equipped with an alphanumeric memory, allowing for the storage of up to 200 memories for easy access to frequently used frequencies.

Advanced features such as a built-in CTCSS (Continuous Tone-Coded Squelch System) and DCS (Digital Coded Squelch) enhance communication clarity by minimizing unwanted noise and ensuring that only desired signals are received. The TM-271A and TM-271E also support a wide range of modulation modes, including FM, allowing versatility in communication styles.

In terms of durability and build quality, the Kenwood TM-271 series excels with a rugged design that withstands the rigors of mobile use. The units are also equipped with a front-facing speaker that delivers excellent audio quality, ensuring clear communications even in noisy environments.

Another notable feature is the wideband reception capability, allowing users to listen to signals outside of the amateur bands, making these transceivers more versatile for everyday monitoring of public safety channels and other broadcasts. Furthermore, the inclusion of a built-in diagnostic function aids users in troubleshooting, ensuring that the radio remains in optimal working condition.

In conclusion, the Kenwood TM-271A and TM-271E are outstanding choices for amateur radio operators seeking a powerful, feature-rich, and user-friendly dual-band transceiver. Their combination of advanced technology, compact design, and rugged reliability makes them a popular choice among both novice and experienced operators in the radio community.