Galaxy dx979 Service Manual

Model DX 979



CB Radio

Service Manual

Copyright Reserved

TABLE OF

DX 979

CONTENTS

PAGE

CHAPTER 1

SPECIFICATIONS

1.0 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.1 Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.2 Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

CHAPTER 2

OPERATION

2.0 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2.1 Control & Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

2.2 Microphone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . … 7

2.3 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . … 7

2.4 Alternate Microphones And Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

CHAPTER 3

CIRCUIT DESCRIPTION

3.0 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.1 PLL Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 9

3.2 Receiver Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.3 Transmitter Modulation Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . … 9

3.4 Transmitter Amplifier Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

CHAPTER 4

ALIGNMENT

4.0 Required Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . … 11

4.1 Alignment Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

CHAPTER 5

MAINTENANCE

5.0 Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

5.1 Periodic Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 16

5.2 Fuse Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

CHAPTER 6

DIAGRAMS AND PARTS LIST

6.0 PCB Layout & Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

- 1 -

DX 979

1.0 GENERAL

Model DX 979
Channels 40
Frequency Range 26.965 – 27.405 MHz
Emission Modes AM/USB/LSB
Frequency Control Phase Lock Loop (PLL) synthesizer
Frequency Tolerance 0.005 %
Frequency Stability 0.001 %
Operating Temperature Range
Microphone
Input Voltage 13.8V DC
Antenna Connector UHF; SO239
Dimensions 7 1/4”(W) x 9”(D) x 2 1/4”(H)
Weight 3.5 lbs.

1.1 TRANSMITTER

RF Power Output AM: 4W; USB/LSB: 12W PEP
RF Transmit Modes AM/SSB
Modulation High and Low level Class B, Amplitude Modulation:

Spurious Emissions - 60dB
Carrier Suppression - 60dB
Audio Frequency Response 300 to 2500 Hz
Antenna Impedance 50 Ohms
Output Indicators Meter shows incoming signal strength, RF output

1.2 RECEIVER

Sensitivity For 10dB S/N (AM/ SSB) AM: < 0.5 uV ; USB/LSB: < 0.25 uV
IF Frequency AM: 10.695 MHz 1st IF, 455 KHz 2nd IF
Image Rejection - 50dB
Adjacent Channel Selectivity - 60dB
RF Gain Control 45dB adjustable for optimum signal reception
Automatic Gain Control (AGC) Figure Of Merit 100mV for 10dB Change in Audio Output
Squelch
Noise Blanker RF type
Audio Output Power 2.5W @ 10% THD
Audio Frequency Response 300 to 2500 Hz
Built-in Speaker 8 Ohms, 4 Watts
External Speaker (Not Supplied) 8 Ohms, 4 Watts

(SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE)

CHAPTER 1

SPECIFICATIONS

-30°C to +50°C
Dynamic PTT, 500 Ω

AM and SSB.

power, SWR and AM Modulation level. Transmit
LED glows red when transmitter is in operation.

Adjustable; threshold less than 0.5µV

- 2 -

CHAPTER 2

DX 979

S

MOD

PWR

1

SWR

10

7

5

3

0

4

0

2

3

1

0

2

5

.

1

1

DX 979

12

11 1413 1815

TALKBACK

9

+

2

0

dB

+

4

0

60

6

3

+

8

6

0

12

0

1

0

0

%

1

8

M

A

X

OFF

CLARIFIER

VOL SQ

OFF

SWR

PWR

CBMOD

NB/ANL

AM

PA

OPERATION

16 17

USB

RX/TX

SWR

LSB

DIM PWRMIC RF

1 23 5476

8

9

Figure 2-1 Front Panel

2.0 INTRODUCTION

This section explains the basic operating procedures for the DX 979 mobile CB radio.

2.1 CONTROLS AND CONNECTIONS

2.1.1 FRONT PANEL

Refer to the above Figure 2-1 for the location of the following controls.

1. MICROPHONE JACK: Used to connect microphone for voice source.

2. SQUELCH CONTROL: This knob is used to eliminate background noise being heard through the

receiver, which can be disturbing when no transmissions are being heard through the receiver. To
use this feature, turn the knob fully counterclockwise and then turn clockwise slowly until the
background noise is just eliminated. Further clockwise rotation will increase the threshold level
which a signal must overcome in order to be heard. Only strong signals will be heard at a maximum
clockwise setting.

3. ON/OFF VOLUME CONTROL: This knob controls the volume and power to the radio. To turn

radio on, rotate the knob clockwise. Turning the knob further will increase the volume of the
receiver.

4. RF GAIN CONTROL: This control is used to reduce the gain of the RF (receive) amplifier under

strong signal conditions.

- 3 -

5. MIC GAIN CONTROL: Adjusts the microphone gain in the transmit and PA modes. This

controls the gain to the extent that full talk power is available several inches away from the
microphone. In the Public Address (PA) mode, the control functions as the volume control.

6. RF POWER CONTROL: This control allows the user to adjust RF power output.

7. DIMMER CONTROL: This knob controls the level of brightness for the faceplate lettering, meter

lamp and channel display.

8. SWR LED: This LED lights red when your SWR is higher than about 3:1. This is not an exact

indicator of 3:1 SWR, but it is an indication that you should check your SWR reading.

9. CHANNEL SELECTOR: This control is used to select the desired transmit and receive channel.

10. FRONT PANEL METER: The front panel meter allows the user to monitor incoming signal

strength, RF output power, SWR level and AM modulation level.

11. ILLUMINATED FACE PLATE: All faceplate lettering will fully illuminate to allow the user

easy viewing at night. This unique, solid state, backlight is designed to maximize night vision while
minimizing eye fatigue. Therefore, it is ideal for switch and control recognition day or night.

12. TALKBACK CONTROL: Adjust this knob for desired volume of Talkback. This is used to

monitor your own voice. For example, you could use this feature to compare different microphones.

13. CLARIFIER CONTROL: Allows tuning of the receive frequency above or below the channel

frequency by up to 1.0KHz. Although this control is intended primarily to tune in SSB signals, it
may be used to optimize AM signals.

14. SWR/MOD/PWR SWITCH: This switch controls the function of the meter during the transmit

mode. In the “SWR” position, the meter indicates the Standing Wave Ratio (SWR) of your antenna.
There are no adjustments because the SWR circuit in this radio calibrates itself automatically. When
the switch is in the “MOD” position, the green scale on the meter indicates your percentage of
modulation in the AM mode only. They are most accurate when testing at maximum power output.
When this switch is in “PWR” position, the meter indicates your power output.

15. NB-ANL/CB/PA SWITCH: When the switch is in the NB/ANL position, the Noise Blanker (NB)

and Automatic Noise Limiter (ANL) circuits are activated. The Noise Blanker is very effective in
eliminating repetitive impulse noise such as ignition interference. In the CB position, the PA
function is disabled and the radio will transmit and receive on the speaker that is connected. In the
PA position, the radio acts as public address amplifier. Your voice will come out of the speaker that
is plugged into the PA. SP. jack on the rear panel. The radio does not operate when you are in the
PA mode.

16. MODE SWITCH: This control allows you to select one of the following operating modes:

AM/USB/LSB.

17. RX/TX LED: This LED is green during receive and red during transmit.

18. CHANNEL DISPLAY: The channel display indicates the current selected channel.

- 4 -

REAR PANEL

Figure 2-2 represents the location of the following connections:

3 45

This device complies with part 15 of the FCC Rules. Operation is subject
to the condit ion that this device does not cause harmful interference.

Servic e Manual at www.GalaxyRadios.com

MODEL NO. : DX 979

AM/SSB 40 CH

CB TRANSCEIVER

DATE OF MFG.:

FCC ID : MEE − DX − 979

SERIAL NO. :

PA SP.

ANT

- DC 13.8V +

1

EXT SP.

F.C.

2

Figure 2-2 Rear Panel

1. ANTENNA: This jack accepts a 50 ohm coaxial cable with a PL-259 type plug.

2. DC POWER: This jack accepts the 13.8V DC power cable with built-in fuse. The power cord

provided with the radio has a black and red wire. The black goes to negative and red goes to
positive.

3. PA SP: This jack is for PA operation. Before operating, you must first connect a PA speaker (8

ohms, 4W) to this jack.

4. EXT. SP: This jack accepts a 4 to 8 ohm, 5 watt external speaker. When the external speaker is

connected to this jack, the built-in speaker will be disabled.

5. F.C.: This jack is used to connect the optional Galaxy FC347 six-digit frequency counter. All

connections, including DC power, are provided to the FC347 through this jack.

- 5 -

2.1.3 FREQUENCY CHART

CHANNEL

CHANNEL FREQUENCY

(MHz)

CHANNEL

CHANNEL FREQUENCY

(MHz)

1 26.965 21 27.215
2 26.975 22 27.225
3 26.985 23 27.255
4 27.005 24 27.235
5 27.015 25 27.245

6 27.025 26 27.265
7 27.035 27 27.275
8 27.055 28 27.285
9 27.065 29 27.295

10 27.075 30 27.305
11 27.085 31 27.315

12 27.105 32 27.325
13 27.115 33 27.335
14 27.125 34 27.345
15 27.135 35 27.355

16 27.155 36 27.365
17 27.165 37 27.375
18 27.175 38 27.385
19 27.185 39 27.395
20 27.205 40 27.405

- 6 -

2.2 MICROPHONE

The receiver and transmitter are controlled by the push-to-talk switch on the microphone. Press the
switch and the transmitter is activated, release the switch to receive. When transmitting, hold the
microphone two inches from your mouth and speak clearly in a normal voice. The radio comes
complete with a low impedance (500 ohm) dynamic microphone.

2.3 OPERATION

2.3.1 PROCEDURE TO RECEIVE

1. Be sure that the power source, microphone and antenna are connected to the proper connectors
before going to the next step.

2. Press the POWER switch to apply power to the radio.

3. Set the VOL to a comfortable listening level.

4. Set the MODE switch to the desired mode.

5. Listen to the background noise from the speaker. Turn the SQUELCH knob slowly clockwise until
the noise just disappears. The SQUELCH is now properly adjusted. The receiver will remain quiet
until a signal is actually received. Do not advance the control too far or some of weaker signals will
not be heard.

6. Set the CHANNEL selector switch to the desired channel.

7. Set the RF GAIN control fully clockwise for maximum RF gain.

8. Adjust the CLARIFIER control to clarify the SSB signals or to optimize AM signals.

2.3.2 PROCEDURE TO TRANSMIT

1. Select the desired channel of transmission

2. Set the MIC GAIN control fully clockwise.

3. If the channel is clear, depress the push-to-talk switch on the microphone and speak in a normal
voice.

- 7 -

2.4 ALTERNATE MICROPHONES AND INSTALLATION

For best results, the user should select a low impedance dynamic type microphone or a transistorized
microphone. Transistorized type microphones have a low output impedance characteristic. The
microphones must be provided with a four-lead cable. The audio conductor and its shielded lead
comprise two of the leads. The third lead is for transmit control and the fourth is for receiving control.

The microphone should provide the functions shown in the schematic below (Figure 2-3).

4 WIRE MIC CABLE

Pin Number Mic Cable Lead

1 Audio Shield
2 Audio Lead
3 Transmit Control
4 Receive Control

Figure 2-3 Your Transceiver Microphone Schematic

Figure 2-4 Microphone plug and pin numbers viewed from rear of pin receptacle.

- 8 -

DX 979

3.0 INTRODUCTION

This section explains the technical theory of operation for the DX 979 mobile CB radio.

3.1 PLL CIRCUIT

The Phase Lock Loop (PLL) circuit is responsible for developing the receiver’s first local oscillator
signal and the transmitter’s exciter signal. The PLL circuit consists primarily of IC2, IC3, Q25, Q29
and Q28. The PLL circuit is programmed by the rotary channel switch GPS-668. The GPS-668
communicates the correct binary data information to the programmable divider inside of IC3. IC3 then
controls the VCO (Voltage Controlled Oscillator) to oscillate on the correct frequency. This signal is
fed either into the receiver’s first mixer (for receive operation) or the transmitter’s mixer (for transmit
operation).

3.2 RECEIVER CIRCUIT

The incoming RF signal comes into the radio via the antenna and into the front-end pre-amp, Q17. The
RF signal is fed into the mixer circuit of Q18/Q19 and then into the AM IF section of the receiver. The
signal is then detected by the AM detector and then fed to the audio amplifier section of the receiver
and finally out to the speaker.

3.3 TRANSMITTER MODULATION CIRCUIT

(1) The transmitter modulation circuit modulates the low-level RF signal from the PLL exciter circuit

with the user’s audio voice signal from the microphone. The audio from the microphone is then
amplified and fed into the transmit amplifier circuit.

(2) If the transceiver is in the AM mode, the AF power amplifier modulates the last RF amplifier,

which produces a true amplitude modulated RF signal.

(3) If the transceiver is in the SSB mode, the audio signal is mixed with the 10.6975MHz oscillator in

IC6.

3.4 TRANSMITTER AMPLIFIER CIRCUIT

The transmitter takes the basic exciter signal from IC9 of the TX mixer and amplifies it through a series
of amplifiers consisting of Q52, Q51, Q49 and Q47 where it is sent out to the antenna connector.

CHAPTER 3

CIRCUIT

DESCRIPTION

- 9 -

- 10 -

DX 979

CHAPTER 4

ALIGNMENT

4.0 REQUIRED TEST EQUIPMENT

c DC Power Supply (13.8VDC, 10A)
d RF Wattmeter (10W)
e Multi-meter
f Automatic Modulation Meter
g Audio Signal Generator

h Frequency Counter (100 MHz)
i RF Signal Generator (100 MHz)
j Automatic Distortion Meter
k Oscilloscope (50 MHz)
l Sinad Meter

4.1 ALIGNMENT PROCEDURES

This transceiver has been aligned at the factory and does not require any adjustments at installation.
The required test equipment listed are used for the test setup or alignment shown in Figure 4-1
Transmitter Test Setup and Figure 4-2 Receiver Test Setup. These test setups are used in part or total
during the following adjustments. Refer to page 15 for adjustment locations.

4.1.1 PLL ALIGNMENT

ITEM U.U.T. SETTING

VCO Disconnect ‘short PCB’ from TP7, TP8 and TP9.

Set radio to CH 1 AM RX mode.
Connect Multi-meter to TP2.

Set CLARIFIER Control to 12 o’clock.

Connect Frequency Counter to IC3 Pin 8. VC1
AM

Frequency
USB

Frequency
LSB

Frequency
TX Offset

Frequency

Connect Oscilloscope to TP3.

Set radio to CH 19 AM RX mode.
Connect Frequency Counter to TP3.

Set radio to CH 19 USB RX mode.
Connect Frequency Counter to TP3.

Set radio to CH 19 LSB RX mode.
Connect Frequency Counter to TP3.

Set radio to CH 19 LSB TX mode.
Connect Frequency Counter to TP3.

AM OSC Set radio to CH 19 AM TX mode.

Connect Frequency Counter to TP5.

USB OSC Set radio to CH 19 USB TX mode.

Connect Frequency Counter to TP5.
Set VR6 fully clockwise

LSB OSC Set radio to CH 19 LSB TX mode.Connect

Frequency Counter to TP5.
Set VR6 back to mid position when finished.

ADJUST

POINT

L14

L15

L20

L21

L22

VR7

L23

L24

L25

MEASUREMENT

2.5 VDC ± 0.1

Adjust for max.

10.2400MHz ± 20Hz

16.4900MHz ± 20Hz

16.4925MHz ± 20Hz

16.4875MHz ± 20Hz

16.4875MHz ± 20Hz

10.6950MHz ± 10Hz

10.6925MHz ± 10Hz

10.6975MHz ± 10Hz

- 11 -

4.1.2 TRANSMITTER ALIGNMENT

ITEM U.U.T. SETTING

BIAS Current Set radio to CH 19 USB TX mode.

Modulation Off.
Remove “short PCB” from TP7, TP8, TP9.
Connect current meter to TP7(+) and TP9 (-)
Connect current meter to TP7(+) and TP8 (-)

SSB APC Set radio to CH 19 USB RX mode.

Connect Multi-meter to TP7.

SSB TX Power Connect “short PCB” to TP7 and TP9.

Connect RF Power Meter to antenna jack.
Set radio to CH 19 USB TX mode.
AF signal 30mV, 1 KHz to microphone.
Set RF PWR fully clockwise.
Set MIC GAIN fully clockwise.

SSB ALC

Set radio to CH 19 USB TX mode.
AF signal 30mV, 1 KHz to microphone.

SSB Carrier
Balance

Set radio to CH 19 USB TX mode.
Set MIC GAIN fully counter-clockwise.
Connect Oscilloscope to antenna connector.

AM TX
High Power

Set radio to CH 19 AM TX mode.
Modulation Off.

Set RF POWER fully clockwise.
AM TX
Low Power
RF Power
Meter

Set RF POWER fully counterclockwise.

Set radio to CH 19 AM TX mode.

Set RF POWER fully clockwise.

Set SWR/MOD/PWR Switch to PWR

position.
AM Modulation Set radio to CH 19 AM TX mode.

AF signal 30mV, 1 KHz to microphone.

Set MIC Gain fully clockwise.

Set SWR/MOD/PWR Switch to MOD position

AM Modulation
Meter

Set radio to CH 19 AM TX mode.

AF signal 30mV, 1 KHz to microphone.

Set MIC Gain fully clockwise.

ADJUST

POINT

VR12
VR10

MEASUREMENT

50 mA
100 mA

VR17 12.5 VDC

L40,L42,
L43,L44

MAX > 12W
Spurious Emission
Minimum.
Balance Power
Between CH1 and
CH40.

VR13

11.5 W

VR6

Spurious Emission to
Minimum.

VR14

3.8 W

VR18

VR9

0.3W±0.2W

For a needle reading
of “4” on TX PWR
scale.

VR16

For a needle reading
of 95% on the
external modulation
meter.

VR15 For a needle reading

of 95% on the
modulation scale.

- 12 -

4.1.3 RECEIVER ALIGNMENT

ITEM U.U.T. SETTING

AM Sensitivity Set radio to CH 19 AM RX mode.

Set RF GAIN Fully Clockwise.

Set SQ Fully Counter Clockwise.

Set VOL Control at 2 o’clock.

Set NB/ANL switch to OFF position.

Set CLARIFIER Control to 12 o’clock.

Connect RF SG to antenna jack

Frequency 27.185 MHz, 1uV. Mod 30%.

Set radio to CH 40 AM RX mode.

RF SG setting 27.405 MHz.

Set radio to CH 1 AM RX mode.

RF SG setting 26.965 MHz.

USB Sensitivity Set radio to CH19 USB RX mode.

Set VOL Control Fully Clockwise.

RF SG setting 27.186 MHz, 0.5uV. Mod off.

LSB Sensitivity Set radio to CH19 LSB RX mode.

Set VOL Control Fully Clockwise.

RF SG setting 27.184 MHz, 0.5uV. Mod off.

NB Adjust Set radio to CH 18 AM RX mode

RF SG setting 27.185 MHz, 1000uV. Mod off.

Set NB/OFF switch to ON position.

Connect Multi-meter to TP1 (D2 cathode).

AM Squelch Set radio to CH 19 AM RX mode.

Set SQ Control Fully Clockwise.

RF SG setting 27.185 MHz, 20mV. Mod 30%.

SSB Squelch Set radio to CH 19 USB RX mode.

Set SQ Control Fully Clockwise.

RF SG setting 27.186 MHz, 20 mV. Mod off.

AM S-Meter Set radio to CH 19 AM RX mode.

RF SG setting 27.185 MHz, 100uV. Mod 30%.

SSB S-Meter

Set radio to CH 19 USB RX mode.

RF SG setting 27.186 MHz, 100uV. Mod off.

ADJUST

POINT

L2,L3,L5,L6,
L7,L8,L9,L10

L5,L6

L11,L12

L11,L12

L1

VR4

VR3

VR1

VR2

MEASUREMENT

Audio Output > 2V
S/N > 10 dB.

For Balance Between
CH 1 and CH 40.

Audio Output > 2V
S/N > 10dB.

Audio Output > 2V
S/N >10dB.

DC Voltage to max.
( > 2.0V )

Adjust very slowly
until squelch just
closes.

Adjust very slowly
until squelch just
closes

For a reading of “9”
on the “S” scale.

For a reading of “9”
on the “S” scale

- 13 -

Figure 4-1 Transmitter test setup

Figure 4-2 Receiver test setup

- 14 -

DRIVER

A

A

BIAS

DX 979 MAIN PCB ADJUSTMENT LOCATION

FINAL
BIAS

RF METER

ALC

M LOW POWER

AM
MOD

APC

AM HI POWER

10.240 MHz
ADJUST

AM LOW POWER

AM

MOD

SSB S-METER

CARRIER
BALANCE

M

AM MOD METER

AM S-METER

SSB

SSB SQUELCH

AM SQUELCH

TX OFFSET

- 15 -

DX 979

5.0 PRECAUTIONS

The inherent quality of the solid-state components used in this transceiver will provide many years of
continuous use. Taking the following precautions will prevent damage to the transceiver.

(i) Never key the transmitter unless an antenna or suitable dummy load is connected to the antenna

receptacle.

(ii) Ensure that the input voltage does not exceed 16 VDC or fall below 11.

(iii) Transmitting over long periods can cause heat built-up and cause transmitter damage.

5.1 PERIODIC INSPECTION

This unit is aligned at the factory to deliver maximum performance. However, continued performance
cannot be expected without periodic inspection and maintenance. Important points to be checked
regularly are as follows;

CHAPTER 5

MAINTENANCE

Check Item Action

Whip antenna
(option)
Coaxial cable If sheath is cracked or immersed

Coaxial & power
plug connections
Battery connection If corroded, clean power

Ground terminal If corroded, clean terminal.

5.2 FUSE REPLACEMENT
To protect the equipment from serious damage, a fuse is provided on the power supply lines. The fuse
protects against over voltage / reverse polarity or internal fault of the equipment. If the fuse has blown,
first find out the cause of the trouble before replacing it. A fuse rated for more than the transceiver
requirement should not be used, since it may permanently damage the equipment. Damage due to over
fusing is not covered by the warranty.

If cracked or broken, replace it.

in water, install new coaxial
cable.
If loosened, reconnect. If
corroded, clean contacts.

terminals.

- 16 -

CHAPTER 6

DX 979

6.0 GENERAL

Information on most electrical and mechanical parts is included in the parts list. The reference
designators are in alphanumeric order.

DIAGRAMS &

PARTS LIST

- 17 -

DX 979 ROTARY SWITCH PCB (EPT092920Z)

(SMD-COPPER SIDE) ( COMPONENT SIDE )

- 18 -

PART LIST:

DX 979 ROTARY SW. P.C.B

ITEM

REFERENCE

NUMBER

RANGER PART

NUMBER

DESCRIPTION

1 EPT092920Z ROTARY SW PCB
2 R207,R210,R218
3 R201

4

R202,R203,R204,R205,

R206
5 R215
6 R221
7 R214
8 R220

RCY010004Z
RCY013314Z
RCY016814Z

RCY014724Z
RCY016824Z
RCY012234Z
RCY016834Z

CHIP/F/R 0.0 Ω 0.1W
CHIP/F/R 330 Ω 0.1W
CHIP/F/R 680 Ω 0.1W

CHIP/F/R 4.7K Ω 0.1W
CHIP/F/R 6.8K Ω 0.1W
CHIP/F/R 22K Ω 0.1W
CHIP/F/R 68K Ω 0.1W

9 C201,C202 CK1104AB5X CHIP/C 0.1uF 50WV

D201,D202,D203,D204,

EDSS00355Y DIODE (S.M.D.) 1SS355

D205,D206,D207,D208,

10

D209,D210,D211,D212,

D13,D214,D215,D216,D

217,D218,D219,D220,D

226,D227,D228

11

D221,D222,D223,D224,

D225

EDSS00181Y DIODE (S.M.D.) 1SS181-TE85L

12 Q207 TY2SC2712G TR 2SC2712GR-TE85L
13

Q201,Q202,Q203,Q204,

Q206

TYZRN1403Z TR RN1403-TE85L

14 Q205 TYZRN2403Z TR RN2403-TE85L
15 J201,J206 EX07N48223 PCB CONN/S 2 PIN
16 J203 EX07N48350 PCB CONN/S 3 PIN
17 J202 EX07N48222 PCB CONN/S 5 PIN
18 J204 EX07N48209 PCB CONN/S 10 PIN
19 ROTARY SW EWRT32059S ROTARY SW GPS-0668
20 J205 WX01070710 JUMPER WIRE

- 19 -

DX 979 DISPLAY PCB (EPT092930Z)

( COMPONENT SIDE )

( COMPONENT SIDE )

( COPPER SIDE )

- 20 -

PART LIST:

DX 979 DISPLAY P.C.B

ITEM

REFERENCE

NUMBER

RANGER PART

NUMBER

DESCRIPTION

1 EPT092930Z DISPLAY PCB
2 R301,R302,R303,R304,

RCY016814Z

CHIP/F/R 680 Ω 0.1W

R305,R306,R307
3 R308 RCY011024Z

CHIP/F/R 1K Ω 0.1W
4 D301,D302 EDSS00355Y DIODE 1SS355
5 LED201,LED202 EX01Y40114 LED LAMPS KM-23ESGC
6 DISPLAY EX03N40419 LED DISPLAY TX-566
7 HI/OFF/LO,NB/CB/PA,

EWSL31027K SLIDE SW. 3N

SWR/MOD/PWR

- 21 -

DX 979 (DIM-PWR/MIC-RF/VOL-SQ CONTROL) VR PCB

(EPT092940Z)

( COMPONENT SIDE )

( COPPER SIDE )

- 22 -

PART LIST:

DX 979 DIM-PWR/MIC-RF/VOL-SQ CONTROL, VR P.C.B

ITEM

REFERENCE

NUMBER

RANGER PART

NUMBER

DESCRIPTION

1 EPT092940Z VR PCB
2 R402 RCY016824Z
3 R401 RCY011034Z

CHIP/F/R 6.8K Ω 0.1W

CHIP/F/R 10K Ω 0.1W
4 C401,C402 CK1102AB5X CHIP/C .001uF 50VW
5 C403,C404 CK1103AB5X CHIP/C .01uF 50VW
6 VR404 RE102Y0128 CHIP/F/R 1K (TMC3KJ)
7 L402 YCTLI5653C CHOKE COIL 5.6uH
8 L401 YCBAD18581

BEAD FERRITE COIL WB-403025

9 Q902 TYDTA124EA T/R DTA124EUAT106

10 (VR401)VOL-SQ-OFF RV50303522 V/R 50KB/50KA W/SW
11 MIC-RF RV10203524 V/R 1KB/1KA
12 DIM-PWR RV50203539 VR 5KB/5KB
13 J401,J408,J410,J411, EX07N48223 PCB CONN/S 2PIN
14 J403,J405,J413 EX07N48350 PCB CONN/S 3PIN
15 J406,J414 EX07W48824 PCB CONN/S 3PIN
16 J407 EX07N41216 PCB CONN/S 3PIN
17 J402 EX07N48222 PCB CONN/S 5PIN
18 J409 EX07W48826 PCB CONN/S 5PIN

- 23 -

DX 979 (TALKBACK/CLARIFIER CONTROL) VR PCB

(EPT092950Z)

( COMPONENT SIDE )

( COPPER SIDE )

PART LIST:

DX 979 TALKBACK/CLARIFIER CONTROL, VR P.C.B

ITEM

1 EPT092950Z TB PCB
2 VR501 (CLARIFIER) RV10203528 VR 1KB
3 VR502 (TALKBACK) RV20203558 VR 20KB/SW
4 J501 EX07N48331 PCB CONN/S 6 PIN
5 J503 EX07N48350 PCB CONN/S 3 PIN

REFERENCE

NUMBER

RANGER PART

NUMBER

DESCRIPTION

- 24 -

DX 979 METER PCB (EPT092961Z)

( COMPONENT SIDE )

( COPPER SIDE )

( COPPER SIDE-SMD )

- 25 -

PART LIST:

DX 979 METER PCB (Dimmer Circuit)

ITEM

REFERENCE

NUMBER

RANGER PART

NUMBER

DESCRIPTION

1 EPT092961Z METER PCB
2 R603 RCY011504Z
3 R606,R607 RCY144704Z
4

R610 RCY011024Z
5 R605 RCY013324Z
6 R604,R611 RCY011034Z
7 R601 RCY011234Z
8 R602 RCY014734Z
9

R609 RCY011844Z

CHIP/F/R 15 Ω 0.1W
CHIP/F/R 47 Ω 1/4W
CHIP/F/R 1KΩ 0.1W
CHIP/F/R 3.3KΩ 0.1W
CHIP/F/R 10KΩ 0.1W
CHIP/F/R 12KΩ 0.1W
CHIP/F/R 47KΩ 0.1W

CHIP/F/R 180KΩ 0.1W
10 C602,C609 CK1103AB5X CHIP/C 0.01uF 50WV
11 C601,C607,C608,C610,

CK1104AB5X CHIP/C 0.1uF 50WV

C612,C620
12 C619,613,614,615,616 CK5105AB7R CHIP/C 1uF 16WV
13 C621 CK1473AB5X CHIP/C 0.047uF 50WV
14 C617 CK2474AB7R CHIP/C 0.47uF 25WV
15 C605,611 CK5475AA7R CHIP/C 4.7uF 16WV
16 C622 CTY161066A T/C 10uF 16WV
17 C603,C606 CEY164767Z E/C 47uF 16WV
18 C604,C618 CEY251077Z E/C 100uF 25WV
19 IC601 YNSN8144BV I.C. SM8144BV
20 D601 EDZD05519Y ZENER DIODE RLZ5.1BT6-11
21 D602 ED1N04148Y DIODE 1N4148
22 Q601,602 TY2SC2712G T/R 2SC2712GR
23 Q603 TYDTC124EA T/R DTC124EUAT106
24 L602 YCTLI2274E CHOKE COIL 220uH
25 L601 YCTLI4774E CHOKE COIL 470uH
26 LAMP EX02N40230 LAMP 0.05 12V
27 EL(SH3024) EX07N49373 PCB CONN/S 3 PIN
28 J603 EX07N48223 PCB CONN/S 2 PIN
29 J601 EX07N48350 PCB CONN/S 3 PIN
30 J602 EX07N48222 PCB CONN/S 5 PIN

- 26 -

DX 979 ANTENNA PCB (EPT360042Z)

(COPPER SIDE-SMD ) ( COPPER SIDE ) ( COMPONENT SIDE )

PART LIST:

DX 979 ANT P.C.B

ITEM

REFERENCE

NUMBER

RANGER PART

NUMBER

DESCRIPTION

1 EPT360042Z ANT P.C.B
2 R9 RCY010004Z 0 OHM 0.1W
3 R1 RCY014714Z 470 OHM 0.1W
4 R3,R4 RCY011014Z 100 OHM 0.1W
5 R2 RCY013314Z 330 OHM 0.1W
6 R5,R11 RCY011024Z 1K OHM 0.1W
7 R10,R12 RCY012224Z 2.2K OHM 0.1W
8 R7,C5 RCY011034Z 10K OHM 0.1W

9 C7 CK1059AB1A 0.5PF 50WV
10 C6 CK1030AB1A 3PF 50WV
11 C3,C4 CK2104AB7R 0.1uF 25WV
12 C1,C2 CK1103AB7L 0.001uF 50WV
13 Q1 TY2SC2712G TR 2SC2712GR
14 D3 EDSS00355Y DIODE 1SS355
15 D1,D2 EDHM0198SY DIODE HSM198S
16 D4 EDMA0028TY DIODE MA28T
17 L1 ECRFZ10053 RF COIL C3RH0610
18 VR1 RE10300009 S/F/R 10K OHM
19 JP1 WX01070715 JUMPER WIRE

- 27 -

DX 979 MAIN PCB (EPT092913Z)

( COMPONENTS SIDE )

- 28 -

DX 979 MAIN PCB (EPT092913Z)

( COPPER SIDE )

- 29 -

,

PART LIST
DX 979 MAIN PCB

REFERENCE
NUMBER

EPT120060A DCB+ PCB
R19,305,258(B239) RCP160004Z
R246 RCP161004Z
R267 RCP161504Z
241 RCP162204Z
R133,213,253,282,113 RCP164704Z
R130,215,220,249 RCP165604Z
R11,101 RCP166804Z
R5,8,30,33,76,81,174,260,263
,3,95,169
R32,100,245 RCP161514Z
R23 RCP161814Z
R140,163,177,259(B239) RCP162214Z
R31,99 RCP162714Z
R6,10,16,24,248,254,300,299 RCP163314Z
R188,268,293,154,155,156,
250,280
R266 RCP165614Z
R4,50,209,89,94 RCP166814Z
R74 RCP168214Z
R62,64,67,72,115,116,118,
122,123,136-138,160,164,
179,186,189,205,206,214,
303,232,237,238,261,269,291,
292,295,98,166,167,320,
R192,88 RCP161224Z
R132,207,233,247,
255,273,251,79,80,54,87,97
R226 RCP161824Z
R20,27,71,75,134,
162,283,313,93,114,197,279
R9,25,28,121 RCP162724Z
R18,22,66,73,128,
191,219,274,73,252,60,110,
171
R52,57 RCP163924Z
R26,84,165,190,195,196,131 RCP164724Z
R264,265,83,92 RCP165624Z
R14,40,41,70,82,312 RCP166824Z
R275,90 RCP168224Z
R1,13,17,65,68,159,161,175,
181,202,210,216,227-231,272
276,296,297,262,56,86,173
R178,310,153 RCP161234Z
R180 RCP161534Z
R187,208,91,109 RCP162234Z
R2,309,311 RCP163334Z
R46 RCP163934Z
R7,29,61,63,185,218,126,157,
222,224,96,150
R21,105,107 RCP166834Z
R45 RCP168234Z
R12,42,43,44,51,53,104,108,
112,182,184,221,225,278
R47,117,135,139,194 RCP162244Z
R49,55,176,170,172 RCP162744Z
R15,111,183 RCP164744Z
R48 RCP168244Z
R106 RCP161054Z
R193 RCP161554Z
R124 RCP161064Z
R244 RCP141514Z
R239 RCP121034Z
C8 CC0508204L 82PF 50WV
C4 CC0501015L 100PF 50WV

RANGER
PART NO.

EPT092913Z MAIN PCB

RCP161014Z

RCP164714Z

RCP161024Z

RCP161524Z

RCP162224Z

RCP163324Z

RCP161034Z

RCP164734Z

RCP161044Z

DESCRIPTION

0 Ω 1/16W
10 Ω 1/16W
150 Ω 1/16W
220 Ω 1/16W
47 Ω 1/16W
56 Ω 1/16W
68 Ω 1/16W
100 Ω 1/16W

150 Ω 1/16W
180 Ω 1/16W
220 Ω 1/16W
270 Ω 1/16W
330 Ω 1/16W
470 Ω 1/16W

560 Ω 1/16W
680 Ω 1/16W
820 Ω 1/16W
1K Ω 1/16W

1.2K Ω 1/16W

1.5K Ω 1/16W

1.8K Ω 1/16W

2.2K Ω 1/16W

2.7K Ω 1/16W

3.3K Ω 1/16W

3.9K Ω 1/16W

4.7K Ω 1/16W

5.6K Ω 1/16W

6.8K Ω 1/16W

8.2K Ω 1/16W
10K Ω 1/16W

12K Ω 1/16W
15K Ω 1/16W
22K Ω 1/16W
33K Ω 1/16W
39K Ω 1/16W
47K Ω 1/16W

68K Ω 1/16W
82K Ω 1/16W
100K Ω 1/16W

220K Ω 1/16W
270K Ω 1/16W
470K Ω 1/16W
820K Ω 1/16W
1M Ω 1/16W

1.5M Ω 1/16W
10M Ω 1/16W
150 Ω 1/4W
10K Ω 1/2W

C137 CC0501515L 150PF 50WV
C31,136 CC0502715L 270PF 50WV
C11,14 CC0503315L 330PF 50WV
C23 CC0505615L 560PF 50WV
C52,197 CC0500101A 1PF 50WV
C225 CC0500201A 2PF 50WV
C218 CC0500301A 3PF 50WV
C61,62,90,79,190 CC0500501A 5PF 50WV
C108,147,1,49 CC0501004A 10PF 50WV
C84,89 CC0501504A 15PF 50WV
C43,76 CC0501804A 18PF 50WV
C54,55 CC0502204A 22PF 50WV
C119,279,226,287 CC0503304A 33PF 50WV
C195 CC0503904A 39PF 50WV
C202,224 CC0504704A 47PF 50WV
C88,116,117 CC0506804A 68PF 50WV
C191,150 CC0501015A 100PF 50WV
C194,192 CC0501515A 150PF 50WV
C196,222,295 CC0501815A 150PF 50WV
C139,141 CC0503904D 39PF 50WV
C140 CC0501515D 150PF 50WV
C130 CC0502004G 20PF 50WV
C281 CC0501015G 100PF 50WV
C282 CC0501815G 180PF 50WV
C220 CC0502215G 220PF 50WV
C86 CC0502715G 270PF 50WV
C201,203 CC0503915G 390PF 50WV
C210 CC0504715G 470PF 50WV
C74,85 CC0505615G 560PF 50WV
C199 CD3005614Z 560P 300WV
C7,47,50,95,99,110,118,120,
174,183, 244,245,100, 246
C81,173,193,206,207, 236,
213,234,250,256,259,272,
249,302,270,177,215, 292,40,
171,235,211,291
C5,18,48,65,87,92,
96,102,105,106,257,151,160,
233,240,251,253,258,260,261,
263,20,217,68,72,143,266
C32,42,45,46,221,162,163,
164
C155 CC0502237L 0.022UF 50WV
C200 CC1001037L 0.01UF 100WV
C2,3,6,9,15,16,17,19,51,57,
58,60,109,114,133,138,161,
205,219,229,230,232,247,
265,267,269,271,278 ,285,
298,188,63,66,69,73,127,
134,135,142,145,146,241,
305,306,307,308,309,310,
311,312,131,262,216
C154 CT0162246Z 0.22UF 16WV
C97,149 CT0161046Z 0.1UF 16WV
C98,180,299,300 CT0162256Z 2.2UF 16WV
C178,296 CM0501045Z 0.1UF 50WV
C237,78 CM0501024Z 0.001UF 50WV
C184 CM0501035Z 0.01UF 50WV
C39,185 CM0502235Z 0.022UF 50WV
C176 CM0504725Z 0.0047UF

C34 CM0504735Z 0.047UF 50WV
C12 CM0502225Z 0.0022UF

C198 CE0501047Z 0.1UF 50WV
C10 CE0504747Z 0.47UF 50WV
C67,75,153,157,170,186,187 CE0501057Z 1UF 50WV
C159,214,242 CE0502257Z 2.2UF 50WV
C103,182 CE0504757Z 4.7UF 50WV
C13,21,22,44,82,115,158,275, CE0251067Z 10UF 25WV

- 30 -

CC0501027L 0.001UF 50WV

CC0501047L 0.1UF 50WV

CC0504737L 0.047UF 50WV

CC0504727L 0.0047UF

50WV

CC0501037L 0.01UF 50WV

50WV

50WV

276,132,239

5

8

VC1 CV038200AZ TRIMMER/C

C80,181 CE0252267Z 22UF 25WV
C37,175,33,144,38 CE0254767Z 47UF 25WV
C156,238,293,107 CE0161077Z 100UF 16WV
C252 CE0162277Z 220UF 16WV
C152,179 CE0163377Z 330UF 16WV
C91 CE0104777Z 470UF 10WV
C243,248 CE0251087Z 1000UF 25WV
C35 CEM254767Z 47UF 25WV
FL3 EFX8106952 10.695MHZ
FL1 EFCFW455HT CFW-455HT
FL2 EFCFE107MX SFE10.7MX
X1 EYCAB10240 10.240MHZ
X3 EYBAA15480 15.480 MHZ
X4 EYBAE10697 10.6975MHZ 1
IC6 ENMA00612Z AN-612
IC1 ENSS00324Z LM324
IC3 ENRG871999 RCI-8719A
IC7 ENRO04558Z BA4558
IC9(B239) ENRCI6130Z RCI-6130
VCO ENNOHIC07A UHIC07A
Q8,17,20 T2SC01674L 2SC1674L
Q51 T2SC02538Z 2SC2538
Q52,53 T2SC01906Z 2SC1906
Q36 TDTC0124ES DTC124ES
Q24,43 TDTC0114ES DTC114ES
Q60 TDTA0124ES DTA124ES
Q30,33,62 T2SA01282E 2SA1282AE
Q1,2,9,10,11,25,28,29,46,27,2
1,22,50
Q3,4,5,7,16,31,35,39,40,42,
44,53,57,13,15,34,56
Q6,38 T2SA00733P 2SA733P
Q55 T2SA01869Z 2SA1869
Q18,19 FMOJ00310Z F.E.T J310
D3-5,7,9,10,13,14,20,21,95,
96,32-35,37,53,60-65,69,
75-81,88,89,102,106,107,
141,50,108,97,82,155,6,15,
24,25,26,27,36,38,50,52,54,

,56,57,85,86,87,90,92,93,

,115,28, 29,51,68,114
D1,2,11,12,30,31 ED1N00060P 1N60P
D110 ED1N04003Z 1N4003
D109 ED1N04007Z 1N4007
D16,17 EDSS00053Z 1SS53
D49 EDSV00251Z SVC-251SPA
D59,72 EDMA00027W MA27W-A
D71,145,156,103
D70 EDZD05519Z 5.1V 0.5W
D73 EDZD05759Z 7.5V 0.5W
L2,3 ECIFT12002 7MC-7172ABW
L6 ECIFT12290 I.F.T.
L20,21,22 ECIFT12012 I.F.T.

L25 ECIFT12013 I.F.T.

L23,24 ECIFT12016 I.F.T.

L1,11 ECIFT12252 I.F.T.
L44 ECIFT12255 I.F.T.
L9,10 ECIFT12256 I.F.T.
L12 ECIFT12257 I.F.T.
L15 ECIFT12258 I.F.T.
L40 ECIFT12262 I.F.T.
L14 ECIFT12263 I.F.T.
L43 ECIFT12265 I.F.T.
C306(L43 PIN4&6) CK1820AA4A 82PF 50WV
L5 ECIFT12253 I.F.T.
L7,42 ECIFT12440 I.F.T.
L8 ECIFT12492 I.F.T.

T2SC01675L 2SC1675L

T2SC00945P 2SC945P

ED1NM4148Z 1N4148

EDMA00027T MA27T-A

20P
(CV38D2001)

113CN-6514X

113CN-6485Z

113CN-6344Z

- 31-

L48 ECCHK16096 470UH
L503 ECCHK16000 0.47UH
L26,27,46 ECCHK16003 470UH
T1 ECCHK16004 1.1MH EI-19
L33,37 ECCHK16070 22UH
L47 ECCHK16176 4.7UH
L16 ECCHK16246 22UH
L28,30 ECSPG18003 SPRING COIL
L29 ECSPG18075 SPRING COIL
L31 ECSPG18365 SPRING COIL
L35 ECSPG18001 SPRING COIL
L38 ECRFZ10048 25 UH
L39 ECBAD18506 BEAD COIL
L41,13 ECBAD18526 BEAD COIL
VR10 RE10100074

VR16,12,7,18 RE10200041 S/F/R 1K

VR14,13 RE50200042 S/F/R 5K

VR1,2,6,15,17 RE10300031 S/F/R 10K

VR9 RE10400043 S/F/R 100K

VR4,3 RE50400087
J9,MIC/IP
JP5,14,15,16,17,18,30,35,
36,37,39,55,63,68,69,75,76,85
,87,88,91,92,99,100,102,103 ,
104,108,109
110,114,120,124,125,126,129,
131,133,136,148,19,153,13,11
2,127
JP31,41,43,46,79,80,81,82,84,
97,106,155,156,6
JP25,57,58,71,96,116,117,
122,123,130,142,119,3,70,113
,141
JP22,24,29,107,134,135,132 WX01070708 JUMP WIRE
JP11,20,38,40,42,83,94,98,4,
128
JP7,10,26,27,44,61,62,65,72,
73,74,78,89,95,114,115,118,
138,150,149,151,152,66,67,77
,105,146,147,33,64
JP8,21,51,139,86 WX01070711 JUMP WIRE
JP12,52,140 WX01070712 JUMP WIRE
JP23,48,111,137,144,154,34,
145,8
JP32,45,93 WX01070714 JUMP WIRE
JP1,47,49,50,54,56,58,90,
121,143
J7,17,22,25,31,34 EX07N48223 P/C/S 2P
J6,11,18,32 EX07N48350 P/C/S 3P
J21 EX07N48490 P/C/S 4P
J3,5,20
J1,14 EX07N48331 P/C/S 6P
J33 EX07N48209 P/C/S 10P
SP(J16) EX07N41330 P/C/S 2P
J12 EX07N41227 P/C/S 3P
TP2,3,5 EX07N48612 1PIN L=11.8
TP7,8,9 XZZZ90006Z ­PA,EXP SP EX06N41045 EAR JACK
L503 WX0012015A TUBE
L504 WH0007005Z LEAD WIRE

- 1 -

S/F/R 100 Ω
(KVSF6-637A)

VM6CK

VM6CK

VM6CK

VM6CK

S/F/R 500K Ω
WX01070702 JUMPER
WX01070705 JUMP WIRE

WX01070706 JUMP WIRE

WX01070707 JUMP WIRE

WX01070709 JUMP WIRE

WX01070710 JUMP WIRE

WX01070713 JUMP WIRE

WX01070715 JUMP WIRE

EX07N48222 P/C/S 5P

DX 979 SCHEMATIC DIAGRAM (CONTROL PCB)

DX 979 SCHEMATIC DIAGRAM (MAIN PCB)

DX 979 EXPLODE DRAWING

DX 979 MECHANICAL PART

UPDATES & CORRECTIONS

Any updates or corrections to this Service

Manual will be included in the

Tech Support section of our website at

www.GalaxyRadios.com.

Two Year Warranty

This new Galaxy radio is covered by a two year limited warranty. Here are the details.

• All of our Galaxy radio model numbers begin with the letters “DX” and are covered by
our Limited Two Year Parts and Labor Warranty.

• “Limited” means that we will repair problems caused by factory defects or normal use
at no charge. Work performed by qualified technicians which did not cause any
damage to the radio will not void the warranty and will be left intact. Problems caused
by unqualified technicians or operator abuse can also be repaired, but there will be a
charge.

• The warranty period begins when the radio is first purchased. However, in the event
that the dated sales receipt has been lost or the radio was purchased used, our radios
are still covered for 26 months from the date of manufacture based on the serial
number. Our warranty comes with the radio and remains valid even if you sell the
radio to someone else. Refurbished radios are distinguised from new radios by using
the letter “R” as the first character of the serial number.

There are no off-site “Factory Authorized” service centers for Galaxy “DX” models. All
warranty work must be done at our facility.

For maximum convenience, these radios may be shipped directly to us for repair after
obtaining a Repair Authorization Number (RAN). This RAN may be obtained from our
website or by calling our Service Department at 760-480-8800 between 10:00 AM and
4:00 PM Pacific Time. The RAN must be written below your return address on the outside
of the shipping box. Boxes, which arrive without an RAN, will be refused, and the
shipping company will return the unopened box to you. Be sure to have a pen and paper
ready along with the serial number of your radio before calling. We will give you the RAN
and our shipping address over the phone.

When you send your radio, please include a copy of the sales receipt and a note with a
detailed description of the symptoms, especially if they are intermittent. This will help our
technicians locate the problem so we don’t waste time sending the radio back and forth.
If possible, please include a daytime phone number in case our technicians have any
questions. Do not send your bracket, power cord or microphone unless we ask you for
these items during our phone conversation.

You are responsible for getting the radio safely to us. (We suggest using United Parcel
Service - UPS.) You must pay to ship the radio to us, and we will pay to ship the radio
back to you. Since we use UPS and they do not deliver to Post Offices boxes, please
provide us with a street address for the return of your radio. Be sure to print clearly.

We appreciate your choosing a Galaxy radio and we will make every effort to get you
back on the air as soon as possible.

Be sure to visit our web site at: www.GalaxyRadios.com.

ATS979010A

July, 2003