Yaesu VX-3R User Manual

VHF/UHF

ULTRA-COMPACT DUAL-BAND TRANSCEIVER

WITH WIDE BAND COVERAGE

VX-3R

Technical Supplement

Introduction

This manual provides the technical information necessary for servicing the VX-3R Ultra-Compact Dual-Band Transceiver.

Servicing this equipment requires expertise in handing surface-mount chip components. Attempts by non-qualified persons to service this equipment may result in permanent damage not covered by the warranty, and may be illegal in some countries.

Two PCB layout diagrams provided for each double-sided board in this transceiver. Each side of the board is referred to by the type of the majority of components installed on that side (“Side A” or “Side B”). In most cases one side has only chip components, and the other has either a mixture of both chip and leaded components (trimmers, coils, electrolytic capacitors, ICs, etc.), or leaded components only.

VERTEX STANDARD CO., LTD.

4-8-8 Nakameguro, Meguro-Ku, Tokyo 153-8644, Japan

VERTEX STANDARD

US Headquarters

10900 Walker Street, Cypress, CA 90630, U.S.A.

YAESU EUROPE B.V.

P.O. Box 75525, 1118 ZN Schiphol, The Netherlands

YAESU UK LTD.

Unit 12, Sun Valley Business Park, Winnall Close Winchester, Hampshire, SO23 0LB, U.K.

VERTEX STANDARD HK LTD.

Unit 5, 20/F., Seaview Centre, 139-141 Hoi Bun Road, Kwun Tong, Kowloon, Hong Kong

VERTEX STANDARD (AUSTRALIA) PTY., LTD.

Normanby Business Park, Unit 14/45 Normanby Road Notting Hill 3168, Victoria, Australia

While we believe the information in this manual to be correct, VERTEX STANDARD assumes no liability for damage that may occur as a result of typographical or other errors that may be present. Your cooperation in pointing out any inconsistencies in the technical information would be appreciated.

Important Note

This transceiver was assembled using Pb (lead) free solder, based on the RoHS specification. Only lead-free solder (Alloy Composition: Sn-3.0Ag-0.5Cu) should be used for repairs performed on this apparatus. The solder stated above utilizes the alloy composition required for compliance with the lead-free specification, and any solder with the above alloy composition may be used.

Contents

Specification .......................................................................................................................................... 2

Exploded View & Miscellaneous Parts.............................................................................................4

Block Diagram .......................................................................................................................................5

Circuit Description .............................................................................................................................. 7

Alignment...............................................................................................................................................9

Board Unit (Schematics, Layouts & Parts)

MAIN Unit ....................................................................................................................................................................... 15

Filter Unit .........................................................................................................................................................................31

SW Unit ............................................................................................................................................................................. 35

VCO Unit ..........................................................................................................................................................................39

Specifications

General

Frequency Ranges: RX 0.5-1.8 MHz (AM Broadcast)

(USA Version) 1.8-30 MHz (SW Band)

30-76 MHz (50 MHz HAM) 76-108 MHz (FM) 108-137 MHz (Air Band) 137-174 MHz (144 MHz HAM) 174-222 MHz (VHF TV) 222-420 MHz (ACT1) 420-470 MHz (430 MHz HAM) 470-800(729) MHz (UHF TV) (757-774) MHz (UHF TV) 800-999 MHz (GEN2; USA Cellular Blocked)

TX 144-146(148) MHz

430-440(450) MHz

Channel Steps: 5/9/8.33/10/12.5/15/20/25/50/100 kHz Frequency Stability: ±5 ppm (–10 °C to +60 °C) Repeater Shift: ±600 kHz (144 MHz)

±1.6/5.0/7.6 MHz (430 MHz)

Emission Type: F2D, F3E, F2A Antenna Impedance: 50 W Supply Voltage: Nominal: 3.7 V DC, Negative Ground

Operating: 3.7 ~ 7.0 V, Negative Ground (EXT DC Jack)

5.0 ~ 7.0 V, Negative Ground (EXT DC Jack w/Charging)

Current Consumption: 120 mA (Receive)

60 mA (Standby, Saver Off) 30 mA (Standby, Saver On, Save Ratio 1:2) 50 mA (Radio Band Receive) 100 μA (Auto Power Off)

1.3 A (1.5 W Tx , 144 MHz) 3.7 V DC

1.6 A (3 W Tx , 144 MHz) 6 V DC

1.2 A (1 W Tx , 430 MHz) 3.7 V DC

1.8 A (2 W Tx , 430 MHz) 6 V DC

Operating Temperature: –20 °C to +60 °C Case Size (W x H x D): 1.9” x 3.2” x 0.9” (47 x 81 x 23 mm) (W/O knob & antenna) Weight: 4.6 oz (130 g) With FNB-82LI & antenna

Transmitter

RF Power Output: 1.5 W (@ 4.5 V AA x 3 or 3.7 V FNB-82LI 144 MHz)

3 W (@ 6 V or EXT DC 144 MHz) 1 W (@4.5 V AA x 3 or 3.7 V FNB-82LI 430 MHz) 2 W (@ 6 V or EXT DC 430 MHz) Low 0.1 W (@ 4.5 V AA x 3 or 3.7 V FNB-82LI) Low 0.3 W (@ 6 V or EXT DC)

Modulation Type: Variable Reactance F2D , F3E, F2A Maximum Deviation: ±5 kHz (F2D , F3E) Spurious Emission: At least 60 dB below (HIGH)

At least 50 dB below (LOW or less than 1 W)

Microphone Impedance:2 kΩ

Receiver

Circuit Type: AM, NFM: Double-Conversion Superheterodyne

WFM: Triple-Conversion Superheterodyne AM Radio/FM Radio: Single-Conversion Superheterodyne

Intermediate Frequencies: 1st: 47.25 MHz (AM, NFM)

1st: 45.8 MHz (WFM) 1st: 130 kHz (AM Radio/FM Radio) 2nd: 450 kHz (AM, NFM) 2nd: 10.7 MHz (WFM) 3rd: 1 MHz (WFM)

Sensitivity:3 μV for 10 dB SN (0.5-1.8 MHz, AM Radio)

3 μV for 10 dB SN (1.8-30 MHz, AM)

0.35 μV TYP for 12 dB SINAD (30-54 MHz, NFM) 1 μV TYP for 12 dB SINAD (54-76 MHz, NFM) 3 μV TYP for 12 dB SINAD (76-108 MHz, FM Radio)

1.5 μV TYP for 10 dB SN (108-137 MHz, AM)

0.2 μV for 12 dB SINAD (137-140 MHz, NFM)

0.16 μV for 12 dB SINAD (140-150 MHz, NFM)

0.2 μV for 12 dB SINAD (150-174 MHz, NFM) 1 μV TYP for 12 dB SINAD (174-225 MHz, NFM)

0.5 μV for 12 dB SINAD (300-350 MHz, NFM)

0.2 μV for 12 dB SINAD (350-400 MHz, NFM)

0.18 μV for 12 dB SINAD (400-470 MHz, NFM)

1.5 μV for 12 dB SINAD (470-540 MHz, WFM) 3 μV TYP for 12 dB SINAD (540-800 MHz, WFM)

1.5 μV TYP for 12 dB SINAD (800-999 MHz, NFM) USA Version Cellular Blocked

Selectivity: NFM, AM: 12 kHz/35 kHz (–6 dB /–60 dB)

WFM : 200 kHz / 300 kHz (–6 dB/–20 dB)

AF Output: 50 mW @ 8 Ω for 10 % THD (@ 3.7 V)

100 mW @8 W for 10 % THD (@ 6 V)

Specifications

Specifications are subject to change without notice, and are guaranteed within the 144 and 430 MHz amateur bands only. Frequency ranges will vary according to transceiver version; check with your dealer.

Exploded View & Miscellaneous Parts

RA0951900 NAME PLATE (YAESU)

RA0111400 RING NUT

RA0947300 ENCODER KNOB ASSY



No.

       

VXSTD P/N

U9900220

U9900068

U07125302

U9900156

U9900044

U44110002

RA0918600

U07240302

FLAT HEAD TAPTITE-B 1.7X4NI #1

PAN HEAD TAPTITE-B M2X4NI#3

PAN HEAD SCREW M1.7X2.5NI#3

PAN HEAD SCREW M2X11NI#3

PAN HEAD TAPTITE-P 1.7X5NI#3 GUIDE

PAN HEAD TAPTITE-B M2X10NI

SPECIAL SCREW (2.6X5X8)

PAN HEAD SCREW M2X4NI#3

Description

Non-designated parts are available only as part of a designated assembly.

RA0922600 FRAME

RA0922700 INTER CONNECTOR

RA0955400 MASK SHEET (EXT)

RA094680A MIC CAP

RA0023500 RING NUT(SMA)

Qty.



 













RA0954400 SHIELD SHEET (LCD)

G6090181 LCD

RA0922500 LIGHT GUIDE

RA0952400 LCD SHEET



MAIN Unit

RA0965600 THERMAL CONDUCTOR

RA095220A CASE ASSY

RA0503600 LATCH NAIL

M3290048 MICROPHONE ELEMENT

RA094660A RUBBER KNOB (PTT)

RA095230A KEY PAD

M4090159 SPEAKER 0.5W/8-OHM

RA0948400 RUBBER RING

RA094830A HOLDER PLATE

RA0950500 DOUBLE FACE (ANT)

SW Unit

FILTER Unit

RA0966900 CONTACT HOLDER ASSY

RA0532100 STUD

RA0955500 SUPPORT

RA094690B EXT CAP











VCO Unit

RA0400300 SHIELD CASE VCO

RA0511800 SPONGE RUBBER (BOAD)

CP8973001 CHASSIS ASSY

RA0924200 HOLDER (ANT)

Q9000881 BAR ANTENNA



RA0952500 MASK SHEET (CHA)



RA0963700 BATTERY COVER ASSY

Block Diagram

Note

Circuit Description

The VX-3R consists of a MAIN-UNIT, a FILTER-UNIT, a SW-UNIT, and a VCO-UNIT. The MAIN-UNIT contains the receiver front end, PLL IC, power and switching circuits, the CPU, audio ICs, and the power circuitry for the LCD, the IF, and audio ICs and the VCO-UNIT for transmit and receive local signal oscillation.

Receiver Signal Flow

The VX-3R includes four receiver front ends, each optimized for a particular frequency range and mode combination.

(1) Triplexer

Received 145 MHz signals, after passing through a lowpass filter to the VHF T/R switch circuit composed of diode switch D1052 (RLS135) and D1053 (1SV307).

Received 430 MHz signals, after passing through a lowpass filter to the UHF T/R switch circuit composed of diode switch D1050 (RLS135) and D1051 (1SV307).

(2) VHF Bands Reception

Received signals between 140 and 150 MHz pass through the Triplexer circuit, low-pass filter/high-pass filter circuit, VHF T/R switch circuit and protector diode D1003 (1SS362) before additional filtering by a band-pass filter prior to application to RF amplifier Q1003 (2SC5555). The amplified RF signal is pass through the band-pass filter to first mixer Q1020 (2SC5555). Meanwhile, VHF output from the VCO-UNIT is amplified by Q1048 (2SC5374) and applied through diode T/R switch D1038 (DAM222M) to mixer Q1020 (2SC5555) as the first local signal.

The 47.25 MHz intermediate frequency product of the mixer is delivered to the IF circuit.

The TUNE voltage from the CPU is amplified by DC amplifier Q1025 (NJU7007F3) and applied to varactors

D1011 (1SV325), D1012 (1SV325), D1013 (HVC369B), D1014 (1SV325), D1015 (1SV325), D1016 (HVC369B), D1025 (1SV325), and D1026 (1SV325) in the variable fre-

quency band-pass filters. By changing the electrostatic capacitance of the varactors, optimum filter characteristics are provided for each specific operating frequency.

(3) UHF Bands Reception

Received signals between 430 and 450 MHz pass through the Triplexer circuit, low-pass filter/high-pass filter circuit, UHF T/R switch circuit and protector diode D1002 (1SS326) before additional filtering by a band-pass filter prior to application to RF amplifier Q1002 (2SC5555). The amplified RF signal is pass through the band-pass filter, RF amplifier Q1013 (2SC5555) and band-pass filter to first mixer Q1019 (2SC5555). Meanwhile, UHF output from the VCO-UNIT is amplified by Q1056 (2SC5374) and ap- plied through diode T/R switch D1039 (DAM222M) to mixer Q1019 (2SC5555) as the first local signal.

The 47.25 MHz intermediate frequency product of the mixer is delivered to the IF circuit.

The TUNE voltage from the CPU is amplified by DC amplifier Q1025 (NJU7007F3) and applied to varactors D1005, D1010, D1023, and D1024 (all HVC358B) in the variable frequency band-pass filters. By changing the electrostatic capacitance of the varactors, optimum filter characteristics are provided for each specific operating frequency.

(4) 47.25-MHz First Intermediate Frequency

The 47.25 MHz first intermediate frequency from first mixers is delivered from the first mixer to IF circuit. On the MAIN-UNIT, the IF for AM and FM-narrow signals is passed through diode switch D1030 (DAP222M) and

47.25 MHz monolithic crystal filter (MCF) XF1001 to narrow IF amplifier Q1030 (2SC4915) for input to IF IC Q1047 (NJM2552V) after amplitude limiting by D1033 (DA221M).

Meanwhile, a portion of the output of 11.7 MHz crystal X1001 is multiplied fourfold by Q1035 and Q1037 (both 2SC4915) to provide the 46.8 MHz second local signal, applied to the Narrow IF IC. Within the IC, this signal is mixed with the 47.25 MHz first intermediate frequency signal to produce the 450 kHz second intermediate frequency.

This second IF is filtered by ceramic filter CF1002 and amplified by the limiting amplifier within the Narrow IF IC before quadrate detection by ceramic discriminator CD1001.

Demodulated audio is output from pin 11 of the Narrow IF IC through narrow mute analog switch Q1068 (2SJ364).

The resulting audio is amplified by AF amplifier Q1005 (NJM2151AV), and output through MIC/EAR jack J1004 to internal speaker SP1001 or an external earphone.

Transmitter Signal Flow

(1) 145 MHz Band Transmit/Receive Switching

Closing PTT switch S3003 on the SW-UNIT pulls the base of Q1011 (DTA144EM) low, causing the collector to go high. This signal is input to pin 44 (PTT) of CPU Q1095 (HD64F2266TF13V), allowing the CPU to recognize that the PTT switch has been pushed. When the CPU detects closure of the PTT switch, pin 70 (TX/RX) goes high. This control signal switches Q1069 (RN4985) to produce the TX control signal that activates Q1071 (2SA2029). At the same time, PLL division data is input to PLL IC Q1041 (MB15A01PFV1) from the CPU, to disable the receiver power saver. Also, switching Q1070 (EMG2) to disable the receiver circuits. Then causing the red side of BUSY/ TX lamp D1009 (CL-165HR/YG) to light.

Circuit Description

(2) Modulation

Voice signal input from either built-in microphone MC1001 on MAIN-UNIT or external jack J1004 on the MAIN-UNIT is pre-emphasized by C1056 and R1033, and processed by microphone amplifier Q1010 (NJM3403AV), IDC (instantaneous deviation control) circuit Q1010 (NJM3403AV) to prevent over-modulation, and active low-pass filter Q1010 (NJM3403AV).

During CTCSS operation, the voice signal is mixed with the TONE ENC subaudible tone signal from pin 43 of the CPU and delivered to the VCO. During DTMF operation, the DTMF tones from pin 55 of the CPU are input to the IDC stage.

(3) 145 MHz Band Transmission

Modulating audio passes through deviation setting D/A converter Q1017 (M62364FP) to VHF MOD of the VCOUNIT mounted on the MAIN-UNIT. This signal is applied to varactor D4005 (HSC277TRF) in the tank circuit of VHF VCO Q4004 (MT3S36FS), which oscillates at the desired VHF transmitting frequency. The modulated VCO signal is buffered by amplifier Q4006 (MT3S36FS) and Q1048 (2SC5374) and delivered through VHF T/R diode switch D1038 to the MAIN-UNIT. The modulated low-level VHF transmit signal from the VCO is passed through diode switch D1040 (DAN222M) to amplifier Q3001 (2SC5374). The modulated VHF transmit signal from the VCO is amplified by Q3001 (2SC5374) and RF power amplifier Q3003 (2SC5226) up to 0.3 or 3 W (depending on the pow- er source). The RF output passes through TX diode switch D1052 (RLS135). RF output is passed by T/R switch and low-pass filter to suppress harmonics and spurious products before output to the antenna at the antenna terminal.

(4) 435 MHz Band Transmission

Modulating audio passes through deviation setting D/A converter Q1017 (M62364FP) to UHF MOD of the VCOUNIT mounted on the MAIN-UNIT. This signal is applied to varactor D4002 (HSC277TRF) in the tank circuit of UHF VCO Q4002 (MT3S36FS), which oscillates at the desired UHF transmitting frequency. The modulated VCO signal is buffered by amplifier Q4006 (MT3S36FS) and Q1056 (2SC5374) and delivered through UHF T/R diode switch D1039 (DAN222M) to the MAIN-UNIT. The modulated low-level UHF transmit signal from the VCO is passed through diode switch D1040 (DAN222M) to amplifier Q3004 (RQA0003DNS). The modulated UHF transmit sig- nal from the VCO is amplified by Q3001 (2SC5374) and RF power amplifier Q3003 (2SC5226) up to 0.3 or 2 W (depending on the power source). The RF output passes through TX diode switch D1050 (RLS135). RF output is passed by T/R switch and low-pass filter to suppress harmonics and spurious products before output to the antenna at the antenna terminal.

PLL Frequency Synthesizer

PLL IC Q1041 (MB15A01PFV1) on the MAIN-UNIT con- sists of a data shift register, reference frequency divider, phase comparator, charge pump, intermittent operation circuit, and band selector switch. Serial PLL data from the CPU is converted into parallel data by the shift register in the PLL IC and is latched into the comparative frequency divider and reference frequency divider to set a frequency dividing ratio for each. An 11.7 MHz reference signal produced by X1001 is input to REF pin 1 of the PLL IC. The internal reference frequency divider divides the

11.7 MHz reference by 2,050 (or 1,640) to obtain a reference frequency of 5 kHz (or 6.25 kHz), which is applied to the phase comparator. Meanwhile, a sample of the output of VHF VCO Q4004 or UHF VCO Q4002 on the VCOUNIT, buffered by Q4006, is input to the PLL IC, where it is frequency-divided by the internal comparative frequency divider to produce a comparative frequency also applied to the phase comparator. The phase comparator compares the phase between the reference frequency and comparative frequency to output a pulse corresponding to the phase difference between them. This pulse is input to the charge pump, and the output from the charge pump passes through a loop filter composed of R1280, R1281, C1185, R1169 and either R1171, C1187, R1174 and C1190 for VHF, or R1170, C1186, R1173 and C1189 for UHF, which convert the pulse into a corresponding smoothed varactor control voltage (VCV). The VCV is applied to varactor D4004 and D4013 (both 1SV325) in the VHF VCO tank circuit, or to varactor D4001 (HVC355B) in the UHF VCO tank circuit, to eliminate phase difference between the reference frequency and comparative frequency, and so locking the VCO oscillation frequency to the reference crystal. The VCO frequency is determined by the frequencydividing ratio sent from the CPU to the PLL IC. During receiver power save operation, the PLL circuit operates intermittently to reduce current consumption, for which the intermittent operation control circuit reduces the lockup time.

Alignment

Introduction

The VX-3R is carefully aligned at the factory for the

specified performance across the amateur band. Realign-

ment should therefore not be necessary except in the event

of a component failure. Only an authorized VERTEX

STANDARD representative should perform all compo-

nent replacement and service, or the warranty policy may

be void. The following procedures cover adjustments that

are not normally required once the transceiver has left

the factory. However, if damage occurs and some parts

are subsequently replaced, realignment may be required.

If a sudden problem occurs during normal operation, it is

likely due to component failure; realignment should not

be done until after the faulty component has been re-

placed. We recommend that servicing be performed only

by authorized VERTEX STANDARD service technicians

who are experienced with the circuitry and fully equipped

for repair and alignment. If a fault is suspected, contact

the dealer from whom the transceiver was purchased for

instructions regarding repair. Authorized VERTEX STAN-

DARD service technicians realign all circuits and make

complete performance checks to ensure compliance with

factory specifications after replacing any faulty compo-

nents. Those who do undertake any of the following align-

ments are cautioned to proceed at their own risk. Prob-

lems caused by unauthorized attempts at realignment are

not covered by the warranty policy. In addition, VERTEX

STANDARD reserves the right to change circuits and

alignment procedures in the interest of improved perfor-

mance, without notifying owners.

Under no circumstances should any alignment be at-

tempted unless the normal function and operation of the

transceiver is clearly understood, the cause of the mal-

function has been clearly pinpointed, any faulty compo-

nents are replaced, and realignment is determined to be

absolutely necessary.

The following test equipment (and familiarity with its

use) is necessary for complete realignment. Correction of

problems caused by misalignment resulting from use of

improper test equipment is not covered under the war-

ranty policy. While most steps do not require all of the

equipment listed, the interactions of some adjustments

may require that additional adjustments be performed.

Do not attempt to perform only a single step unless it is

clearly isolated electrically from all other steps. Have all

test equipment ready before beginning and, follow all of

the steps in a section in the order presented.

Required Test Equipment

P RF Signal Generator with calibrated output level at 500 MHz

P Deviation Meter (linear detector)

P In-line Wattmeter with 5% accuracy at 500 MHz

P 50-ohm, 10-W RF Dummy Load

P 8-ohm AF Dummy Load

P Regulated DC Power Supply adjustable from 3 to 15 V DC, 3A

P Frequency Counter: 0.2-ppm accuracy at 500 MHz

P AF Signal Generator

P AC Voltmeter

P DC Voltmeter: high impedance

P UHF Sampling Coupler

P SINAD Meter

Alignment Preparation & Precautions

A 10 W RF dummy load and in-line wattmeter must

be connected to the main antenna jack in all procedures

that call for transmission, alignment is not possible with

an antenna. After completing one step, read the next step

to see if the same test equipment is required. If not, re-

move the test equipment (except dummy load and watt-

meter, if connected) before proceeding.

Correct alignment requires that the ambient tempera-

ture of the transceiver be the same as that of the test equip-

ment, and that the temperature be held constant between

68 ~ 86 °F (20 ~ 30 °C). When the transceiver is brought

into the shop from hot or cold air, it should be allowed

some time to come to room temperature before alignment.

Whenever possible, alignments should be made with os-

cillator shields and circuit boards firmly affixed in place.

The test equipment must be thoroughly warmed up be-

fore beginning.

Note: Signal levels in dB referred to in the alignment procedure

are based on 0 dBμ=0.5 μV (closed circuit).

Test Setup

Set up the test equipment as shown below for transceiv-

er alignment, and apply 4.4 V DC power to the transceiver.

Refer to the drawings for Alignment Points.

RF Signal

Generator

In-Line

Wattmeter

50-ohm RF

Dummy Load

Deviation

Meter

Frequency

Counter

Sampling

Coupler

Alignment Setup

8-ohm

AF Load

SINAD

Meter

Alignment

Internal System Alignment Routine

This uses a programmed routine in the transceiver, which

simplifies many previously complex discrete component

settings and adjustments with digitally controlled settings

via front panel buttons and LCD indications.

To enter the alignment mode: U Program the alignment password "AH028M" into

the CW ID memory via the Set Mode Item 19: CW ID.

(See the box below for programming the alignment

password.)

U Turn off the transceiver. U Press and hold in the [TXPO] button while powering

the radio on to enter the alignment mode.

U In the alignment mode, each adjustment item is shown

on the LCD in the Memory Channel Number display

slot, and is selected by rotating the DIAL knob.

To exit the alignment mode:

U Press the [HM/RV] button. U Clear the alignment password from the CW ID mem-

ory, and program the user's CW ID, if needed.

Warning!: Do not change the alignment items which are not described in the adjustment procedures.

Programming the Alignment Password

1. Press and hold in the [TXPO] key for one second to

enter the Set mode.

2. Rotate the DIAL knob to select Set Mode Item 19: CW

ID.

Note: Do not forget to pull the DIAL knob to rotate the

DIAL knob.

3. Press the [TXPO] key momentarily to enable adjust-

ment of this Set Mode Item.

4. Rotate the DIAL knob to set this Item to "ON".

5. Press the [V/M] key momentarily to display any previ-

ously stored callsign.

Note the previously stored call sign, so you can re-

enter it later.

6. Press and hold the [HM/RV] key for 2 seconds to clear

any previous callsign.

7. Rotate the DIAL knob to select the "A", then press the

[V/M] key momentarily to save the "A" and move on

to the next character.

8. Repeat the previous step to complete the alignment

password "AH028M".

9. Press the [TXPO] key momentarily, then press the PTT

switch to save the settings and exit to normal opera-

tion.

PLL Reference Frequency Adjustment (REF)

P Rotate the DIAL knob to select the alignment item "rEF".

P Press the [V/M] key.

P Press the PTT switch, then rotate the DIAL knob so that

the Frequency Counter reading is 440.000 MHz ±200

Hz.

P Press the [V/M] key again.

430 MHz band

RX Tune Adjustment

P Connect the RF Signal Generator to the ANT jack, and

then set the output level to -10 dBμV at the 435.100 MHz

(with 1 kHz tone @ ±3.5 kHz deviation).

P Connect the SINAD meter to the MIC/SP jack

P Rotate the DIAL knob one click counter-clockwise to

select the alignment item "tUn".

P Press the [V/M] key.

P Rotate the DIAL knob for minimum defection of the

SINAD meter.

P Press the [V/M] key again.

Squelch Threshold Adjustment

P Connect the RF Signal Generator to the ANT jack, and then

set the output level to -12 dBμV at the 435.100 MHz (with 1

kHz tone @ ±3.5 kHz deviation).

P Rotate the DIAL knob three clicks clockwise to select the

alignment item "tHL".

P Press the [V/M] key.

P Press the [F/W] key twice, and then press the [V/M] key again.

Squelch Tight Adjustment

P Connect the RF Signal Generator to the ANT jack, and then

set the output level to -5 dBμ at the 435.100 MHz (with 1 kHz

tone @ ±3.5 kHz deviation).

P Rotate the DIAL knob one click clockwise to select the align-

ment item "tIg".

P Press the [V/M] key.

P Press the [F/W] key twice, and then press the [V/M] key again.

NFM S-Meter S-1 Adjustment

P Connect the RF Signal Generator to the ANT jack, and then

set the output level to -7 dBμV at the 435.100 MHz (with 1

kHz tone @ ±3.5 kHz deviation).

P Rotate the DIAL knob one click clockwise to select the align-

ment item "S1".

P Press the [V/M] key.

P Press the [F/W] key twice, and then press the [V/M] key again.

Alignment

NFM S-Meter Full Scale Adjustment

P Connect the RF Signal Generator to the ANT jack, and then

set the output level to +20 dBμV at the 435.100 MHz (with 1

kHz tone @ ±3.5 kHz deviation).

P Rotate the DIAL knob one click clockwise to select the align-

ment item "S9".

P Press the [V/M] key.

P Press the [F/W] key twice, and then press the [V/M] key again.

WFM S-Meter S-1 Adjustment

P Connect the RF Signal Generator to the ANT jack, and then

set the output level to 0 dBμV at the 435.100 MHz (with 1

kHz tone @ ±20 kHz deviation).

P Rotate the DIAL knob one click clockwise to select the align-

ment item "S1".

P Press the [V/M] key.

P Press the [F/W] key twice, and then press the [V/M] key again.

WFM S-Meter Full Scale Adjustment

P Connect the RF Signal Generator to the ANT jack, and then

set the output level to +20 dBμV at the 435.100 MHz (with 1

kHz tone @ ±20 kHz deviation).

P Rotate the DIAL knob one click clockwise to select the align-

ment item "S9".

P Press the [V/M] key.

P Press the [F/W] key twice, and then press the [V/M] key again.

High TX Power Adjustment

P Connect the 50-Ohm Dummy Load and Wattmeter to the

ANT jack.

P Increase the DC power supply voltage to 6.0 V.

P Rotate the DIAL knob one click clockwise to select the align-

ment item "HHP".

P Press the [V/M] key.

P Press the PTT switch, then rotate the DIAL knob so that the

Wattmeter reading is 2.0 W ±0.1 W.

P Reduce the DC power supply voltage to 4.4 V.

P Rotate the DIAL knob one click clockwise to select the align-

ment item "HP".

P Press the [V/M] key.

P Press the PTT switch, then rotate the DIAL knob so that the

Wattmeter reading is 1.0 W ±0.1 W.

P Press the [V/M] key again.

Low TX Power Adjustment

P Connect the 50-Ohm Dummy Load and Wattmeter to the

ANT jack.

P Rotate the DIAL knob one click clockwise to select the align-

ment item "LP".

P Press the [V/M] key.

P Press the PTT switch, then rotate the DIAL knob so that the

Wattmeter reading is 0.1 W ±0.05 W.

P Press the [V/M] key again.

MAX Deviation Adjustment

P Connect the 50-Ohm Dummy Load, Wattmeter, and Devia-

tion Meter to the ANT jack.

P Connect the AF Generator to the MIC/SP jack, and then set

the output level to 50 mV at 1 kHz.

P Rotate the DIAL knob one click clockwise to select the align-

ment item "dEV".

P Press the [V/M] key.

P Press the PTT switch, then rotate the DIAL knob so that the

Deviation meter reading is 4.2 kHz ±0.1 kHz.

P Press the [V/M] key again.

CTCSS Tone Deviation Adjustment

P Connect the 50-Ohm Dummy Load, Wattmeter, and Devia-

tion Meter to the ANT jack.

P Rotate the DIAL knob one click clockwise to select the align-

ment item "100".

P Press the [V/M] key.

P Press the PTT switch, then rotate the DIAL knob so that the

Deviation meter reading is 0.65 kHz ±0.05 kHz.

P Press the [V/M] key again.

DCS Deviation Adjustment

P Connect the 50-Ohm Dummy Load, Wattmeter, and Devia-

tion Meter to the ANT jack.

P Rotate the DIAL knob one click clockwise to select the align-

ment item "dCS".

P Press the [V/M] key.

Press the PTT switch, then rotate the DIAL knob so that the

Deviation meter reading is 0.65 kHz ±0.05 kHz.

P Press the [V/M] key again.

alignment item "S9".

P Press the [V/M] key.

P Press the [F/W] key twice, and then press the [V/M] key

again.

Alignment