SERVICE MANUAL

UHF FM TRANSCEIVERS
6-9-16, Kamihigashi, Hirano-ku, Osaka, 547-0002, Japan
S-13610Z-CD 2000 Icom Inc.

INTRODUCTION

This service manual describes the latest service information for the IC-F4GT and IC-F4GS at the time of publication. To upgrade quality, all electrical or mechanical parts and internal circuits are subject to change without notice or obligation.

DANGER

NEVER connect the transceiver to an AC outlet or to a DC power supply that uses more than 16 V. Such a connection could cause a fire hazard and/or electric shock. DO NOT expose the transceiver to rain, snow or any liquids. DO NOT reverse the polarities of the power supply when connecting the transceiver. DO NOT apply an RF signal of more than 20 dBm (100mW) to the antenna connector. This could damage the transceivers front end.

ORDERING PARTS

Be sure to include the following four points when ordering replacement parts: 1. 2. 3. 4. 10-digit order numbers Component part number and name Equipment model name and unit name Quantity required

<SAMPLE ORDER>

1130007610 S.IC PD3140GS IC-F4GT 8810009510 Screw BT M2 x 4 NI-ZU IC-F4GS MAIN UNIT 1 pieces Chassis 10 pieces

IC-F4GT

IC-F4GS
Addresses are provided on the inside back cover for your convenience.
6-9-16, Kamihigashi, Hirano-ku, Osaka 547-0002, Japan Phone : 5302 Fax : 0013
< Corporate Headquarters >
2380 116th Avenue N.E., Bellevue, WA 98004, U.S.A. Phone : (425) 454-8155 Fax : (425) 454-1509 URL : http://www.icomamerica.com < Customer Service > Phone : (425) 454-7619
Communication Equipment Himmelgeister Str. 100, D-40225 Dsseldorf, Germany Phone : Fax : URL : http://www.icomeurope.com

REPAIR NOTES

Make sure a problem is internal before disassembling the transceiver. DO NOT open the transceiver until the transceiver is disconnected from its power source. DO NOT force any of the variable components. Turn them slowly and smoothly. DO NOT short any circuits or electronic parts. An insulated turning tool MUST be used for all adjustments. DO NOT keep power ON for a long time when the transceiver is defective. DO NOT transmit power into a signal generator or a sweep generator. ALWAYS connect a 40 dB to 50 dB attenuator between the transceiver and a deviation meter or spectrum analyzer when using such test equipment. 8. READ the instructions of test equipment thoroughly before connecting equipment to the transceiver. 1. 2. 3. 4. 5. 6. 7.
3071 #5 Road, Unit 9, Richmond, B.C., V6X 2T4, Canada Phone : (604) 273-7400 Fax : (604) 273-1900 URL : http://www.icomcanada.com
Crta. de Gracia a Manresa Km. 14,Sant Cugat del Valles Barcelona, SPAIN Phone : (93) 70 Fax : (93) 46 URL : http://www.icomspain.com
A.C.N. 575 290-294 Albert Street, Brunswick, Victoria, 3056, Australia Phone : 0666 Fax : 0022 URL : http://www.icom.net.au
Unit 9, Sea St., Herne Bay, Kent, CT6 8LD, U.K. Phone : Fax : URL : http://www.icomuk.co.uk
6F No. 68, Sec. 1 Cheng-Teh Road, Taipei, Taiwan, R.O.C. Phone : (02) Fax : (02) 2559 1874
Zac de la Plaine, Rue Brindejonc des Moulinais BP 5804, 31505 Toulouse Cedex, France Phone : Fax : URL : http://www.icom-france.com

TABLE OF CONTENTS

SECTION SECTION SECTION 3

3-1 3-2

SPECIFICATIONS INSIDE VIEWS DISASSEMBLY AND OPTION INSTRUCTIONS
DISASSEMBLY INSTRUCTION.3-1 OPTIONAL UNIT INSTALLATIONS.3-2

SECTION

4-1 4-2 4-3 4-4 4-5

CIRCUIT DESCRIPTION

RECEIVER CIRCUITS.4-1 TRANSMITTER CIRCUITS.4-1 PLL CIRCUITS.4-2 POWER SUPPLY CIRCUITS.4-3 CPU PORT ALLOCATIONS.4-4

5-1 5-2 5-3

ADJUSTMENT PROCEDURES
PREPARATION.5-1 PLL ADJUSTMENT.5-4 SOFTWARE ADJUSTMENT.5-5
SECTION SECTION SECTION SECTION SECTION
PARTS LIST MECHANICAL PARTS AND DISASSEMBLY SEMI-CONDUCTOR INFORMATION BOARD LAYOUTS
10 BC-137 OPTIONAL DESKTOP CHARGER INFORMATION
10-1 10-2 10-3 10-4 PARTS LIST.10-1 DISASSEMBLY INFORMATION.10-1 VOLTAGE DIAGRAM.10-2 BOARD LAYOUT.10-2

SECTION SECTION

BLOCK DIAGRAM

12 VOLTAGE DIAGRAM

SECTION 1

GENERAL

Frequency coverage Type of emission Number of channels Power supply requirement Current drain (approx.)

SPECIFICATIONS

: 440.000470.000 MHz : 8K50F3E : 32 ch (16 channels 2 banks: 2-BANK version), 16 ch (16 channel version) : 7.2 V DC (negative ground; supplied battery pack) : Transmit Receive at High (4.0 W) at Low (1.0 W) rated audio stand-by 1.55 A 800 mA 250 mA 70 mA
Frequency stability Usable temperature range Dimensions (projections not included) Weight (with ant., BP-209)

: 0.00025 % : 30C to +60C; 22F to +140F : 54(W) 132(H) 35(D) mm; 2 532(W) 5 316(H) 1 38(D) in. : 355 g; 12.5 oz.

TRANSMITTER

RF output power (at 7.2 V DC) (with supplied battery pack) Modulation system Maximum frequency deviation Spurious emissions Adjacent channel power Transmitter audio distortion Limitting charact of modulator Ext. microphone connector : 4 W / 1 W (High / Low) : Variable reactance frequency modulation : 2.5 kHz : 73 dBc (typical) : 60 dB (typical) : Less than 3% at 1 kHz, 40% deviation : 70100% of max. deviation : 3-conductor 2.5(d) mm (110)/2.2 k

RECEIVER

Receive system Intermediate frequencies Sensitivity Squelch sensitivity Adjacent channel selectivity Spurious response rejection Intermodulation rejection ratio Hum and noise Audio output power (at 7.2 V DC) Ext. speaker connector : Double conversion superheterodyne system : 1st 2nd 46.35 MHz 450 kHz
: 0.3 V at 12 dB SINAD (typical) : 0.3 V at threshold (typical) : 65 dB (typical) : 70 dB (typical) : 70 dB (typical) : 40 dB (typical) : 500 mW typical at 5% distortion with an 8 load : 3-conductor 3.5(d) mm (18)/8
Specifications are measured in accordance with EIA/TIA-603.
All stated specifications are subject to change without notice or obligation.

SECTION 2

MAIN UNIT

INSIDE VIEWS

TOP VIEW
Antenna switcing circuit (D2, D8: MA77)

BOTTOM VIEW

Antenna switcing circuit (D1: 1SV307)
Power amplifier (Q1: 2SK2974)
APC IC3A: NJM3403AV Q37: DTA144EU

1st mixer (Q13: 3SK239A)

IF amplifier (Q14: 2SC4215 O)

VCO circuit

PLL IC (IC1: PD3140GS) D/A converter (IC10: M62363FP-650C) TX/RX switch (D3, D4: MA77) EEPROM (IC7: HN58X2432TI) CPU (IC8: HD6433876B34H)

Mic amplifier circuit

Low pass filter circuit

SECTION 3

DISASSEMBLY AND OPTION INSTRUCTIONS
3-1 DISASSEMBLY INSTRUCTION
REMOVING THE CHASSIS PANEL
Unscrew 1 nut A, and remove 1 knob B. Unscrew 2 screws C. Take off the chassis in the direction of the arrow. Unplug J6 to separate front panel and chassis.
C (nickel, 2 mm) x 2 Chassis

J6 (Speaker connector)

Front panel

REMOVING THE MAIN UNIT

Remove the searing rubber. Unsolder 3 points D, and unscrew 1 nut E. Unscrew 3 screws F and 6 screws G (silver, 2 mm) to separate the chassis and the MAIN unit. Take off the MAIN unit in the direction of the arrow.
(silver, 2 mm) x 6 Shield cover

F F G D G

MAIN unit
Guide holes Sealing rubber Chassis
3-2 OPTIONAL UNIT INSTALLATIONS
Remove the option cover. Remove the bottom protective paper of spoge. Connect one of UT-96, UT-105, UT-108, UT-109, UT-110, UT-111, and UT-113 optional units to J5. Replace the option cover to the chassis-hole.

4-1-3 1ST MIXER AND 1ST IF CIRCUITS
The 1st mixer circuit converts the received signal into a fixed frequency of the 1st IF signal with a PLL output frequency. By changing the PLL frequency, only the desired frequency will pass through a crystal filter at the next stage of the 1st mixer.
2ND IF AND DEMODULATOR CIRCUITS
2nd IF filter 450 kHz C122 R87 RR86 CNoise detector Limiter amp. RSSI 5 Noise comp. Mixer X4 15.3 MHz FIPLL IC IC16
Active filter "SQLIN" signal to the D/A convertor (IC10, pin 23) FM detector 9 AF signal "DET" R83 C112 C113

IC2 TA31136F

10 CR82 R5 X3 R1st IF from the IF amplifier (Q14) "NOIS" signal to the CPU pin 19 "SD" signal to the CPU pin 98

4-1-5 AF CIRCUIT

AF signals from the FM IF IC (IC2, pin 9) are applied to the mute switch (IC4, pin 1) via the AF filter circuit (IC3b, pins 6, 7). The output signals from pin 11 are applied to the AF power amplifier (IC5, pin 4) after being passed through the [VOL] control (R143). The applied AF signals are amplified at the AF power amplifier circuit (IC5, pin 4) to obtain the specified audio level. The amplified AF signals, output from pin 10, are applied to the internal speaker (SP1) as the SP signal via the [SP] jack when no plug is connected to the jack.
The AF signals from the microphone are applied to the microphone amplifier circuit (IC3c, pin 10). The amplified AF signals are passed through the low-pass filter circuit (IC3d, pins 13, 14) via the mute switch (IC4, pins 4, 3). The filtered AF signals are applied to the modulator circuit after being passed through the mute switch (IC4, pins 9, 8).

4-2-2 MODULATION CIRCUIT

The modulation circuit modulates the VCO oscillating signal (RF signal) using the microphone audio signal. The audio signals change the reactance of a diode (D404) to modulate an oscillated signal at the VCO circuit (Q7, Q8). The oscillated signal is amplified at the buffer-amplifiers (Q4, Q6), then applied to the T/R switching circuit (D3, D4).

4-1-6 SQUELCH CIRCUIT

A squelch circuit cuts out AF signals when no RF signals are received. By detecting noise components in the AF signals, the squelch switches the AF mute switch. A portion of the AF signals from the FM IF IC (IC2, pin 9) are applied to the active filter section (IC2, pin 8) where noise components are amplified and detected with an internal noise detector. The active filter section amplifies noise components. The filtered signals are rectified at the noise detector section and converted into NOIS (pulse type) signals at the noise comparator section. The NOIS signal is applied to the CPU (IC8, pin 19). The CPU detects the receiving signal strength from the number of the pulses, and outputs an RMUT signal from pin 49. This signal controls the mute switch (IC4, pin 13) to cut the AF signal line.

4-2-3 DRIVE/POWER AMPLIFIER CIRCUITS
The signal from the VCO circuit passes through the T/R switching circuit (D3) and is amplified at the buffer (Q403, Q3), pre-drive (Q2) and power amplifier (Q1) to obtain 4 W of RF power (at 7.2 V DC). The amplified signal passes through the antenna switching circuit (D1), and low-pass filter and is then applied to the antenna connector. The bias current of the pre-drive (Q2) and the power amplifier (Q1) is controlled by the APC circuit.

4-2-5 APC CIRCUIT

The APC circuit (IC3a, Q37) protects the drive and the power amplifiers from excessive current drive, and selects HIGH or LOW output power. The signal output from the power detector circuit (D32, D33) is applied to the differential amplifier (IC3a, pin 2), and the T4 signal from the expander (IC10, pin 11), controlled by the CPU (IC8), is applied to the other input for reference.

4-2 TRANSMITTER CIRCUITS

4-2-1 MICROPHONE AMPLIFIER CIRCUIT
The microphone amplifier circuit amplifies audio signals with +6 dB/octave pre-emphasis characteristics from the microphone to a level needed for the modulation circuit.

APC CIRCUIT

RF signal from PLL

Q2 Driver amp.

Q1 Power amp. D33

L4 LPF D32 to antenna

S5 Q37 T4 + APC control circuit IC3a
Power detector circuit (D32, D33)
When the driving current is increased, input voltage of the differential amplifier (pin 2) will be increased. In such cases, the differential amplifier output voltage (pin 1) is decreased to reduce the driving current.
4-4 POWER SUPPLY CIRCUITS

VOLTAGE LINE

LINE HV VCC DESCRIPTION The voltage from the attached battery pack. The same voltage as the HV line (battery voltage) which is controlled by the power swtich ([VOL] control). Common 5 V converted from the VCC line by the reference regulator circuit (IC6). The output voltage is applied to the CPU (IC8), the 5 V regulator circuit (Q18, Q19), reset circuit (IC11) and etc. 5 V for transmitter circuits regulated by the T5 regulator circuit (Q22). 5 V for receiver circuits regulated by the R5 regulator circuit (Q21). Common 5 V converted from the VCC line by the S5 regulator circuit (Q18, Q19). The same voltage as the CPU5 line for the optional HM-46L, HM-75A or HS-51 through a resistor (R132).

4-3 PLL CIRCUIT

A PLL circuit provides stable oscillation of the transmit frequency and receive 1st LO frequency. The PLL output compares the phase of the divided VCO frequency to the reference frequency. The PLL output frequency is controlled by the divided ratio (N-data) of a programmable divider. The PLL circuit contains the VCO circuit (Q7, Q8). The oscillated signal is amplified at the buffer-amplifiers (Q6, Q5) and then applied to the PLL IC (IC1, pin 2). The PLL IC contains a prescaler, programmable counter, programmable divider and phase detector, etc. The entered signal is divided at the prescaler and programmable counter section by the N-data ratio from the CPU. The divided signal is detected on phase at the phase detector using the reference frequency. If the oscillated signal drifts, its phase changes from that of the reference frequency, causing a lock voltage change to compensate for the drift in the oscillated frequency. A portion of the VCO signal is amplified at the buffer-amplifier (Q4), and is then applied to the receive 1st mixer (Q13) or transmit buffer-amplifier circuit (Q403) via the T/R switching diode (D3, D4).

T5 R5 S5

PLL CIRCUIT
VCO circuit Q7, Q8 Buffer Q6
"DEV" signal from the D/A convertor (IC10, pin 22) when transmitting

Buffer Q4

to transmitter circuit to 1st mixer circuit

D4 Loop filter Buffer Q5

8 45.9 MHz signal to the FM IF IC 17

Phase detector 3

Programmable counter

Prescaler

PLST SCK SO
Programmable divider 16 X4 15.3 MHz

Shift register

4-5 PORT ALLOCATIONS

4-5-1 CPU (IC8)

Pin number Port name VIN RESET CSIFT SCK Description Input port for battely voltage detection. Input port for RESET signal. Outputs reference oscillator for the CPU control signal. Outputs clock signal to the PLL IC (IC1), EEPROM (IC7), etc. Outputs strobe signals to the expander IC (IC10, pin 6). Input port for the initial version signal. Input port for the cloning signal. Outputs the cloning signal. Outputs strobe signals to the PLL IC (IC1, pin 3). Input port for noise signals (pulse type). Outputs BUSY detection. Low: The channel is busy. Input ports for the optional unit detection signal from J5. Output ports for key matrix. Low: When the key is pushed. Outputs RX mute control signal. Input port for the RX mute signal from optional units. Output TX mute control signal. Input port for the TX mute signal from optional units. Outputs low-pass filter cut-off frequency control signal when DTCS is activated. Outputs S5 regulator control signal. Low: While power is ON. Outputs R5 regulator control signal. Low: While receiving. Outputs T5 regulator control signal. Low: While transmitting. Outputs APC circuit control signal. High: While transmitting. Outputs control signal for the regulator circuit of AF power amplifier. High: When squelch is open, etc. Outputs LCD backlight control signal. High: Lights ON. Outputs EEPROM (IC7, pin 6) clock signal. I/O port for data signals from/to EEPROM (IC7, pin 5) 100 BDET REM0 SD LVIN TEMP 90 MTONE

CPU (IC8)continued

Pin number 63 Port name UNLK Description Input port for unlock signal. High: PLL is unlocked. Output port for: Beep audio while receiving. 2/5-tone signals while transmitting. Outputs DTMF tone signal while transmitting. CTCSS/DTCS signals input port for decording. Input port for the [PTT] switch. High: While [PTT] switch is pushed. Input port for the batterys type detection. Input port for the remote-control signal from external MIC (HM-75). Input port for the RSSI detection. Input port for the PLL lock voltage. Input port for the transceivers internal temperature detection.

DTMF CTCIN PTT

CLIN CLOUT PLST NOIS
BUSY OPV3 OPV1 KR3 KR0 RMUT
4-5-2 OUTPUT EXPANDER IC (IC10)
Pin number 2, 3, 10, 7 Port name T1T4 DAST SCK Description Output tunable bandpass filter control signals. Input port for strobe signal from the CPU (IC8, pin 15). Input port for clock signal from the CPU (IC8, pin 12).

S5C R5C T5C TXC

LIGT ESCK ESDA
SECTION 5 ADJUSTMENT PROCEDURES

5-1 PREPARATION

When you adjust the contents on page 5-5 or 5-6, SOFTWARE ADJUSTMENT, the optional CS-F3G ADJ ADJUSTMENT SOFTWARE (Rev. 2.0 or later), OPC-478 CLONING CABLE and a JIG CABLE (see illustration at page 5-2) are required.
s REQUIRED TEST EQUIPMENT
EQUIPMENT DC power supply GRADE AND RANGE Output voltage Current capacity Measuring range Frequency range Impedance SWR : 7.2 V DC : 5 A or more : : : : 110 W 300600 MHz 50 Less than 1.2 : 1 EQUIPMENT Audio generator Attenuator Standard signal generator (SSG) DC voltmeter Oscilloscope GRADE AND RANGE Frequency range Output level Power attenuation Capacity Frequency range Output level Input impedance Frequency range Measuring range Measuring range : 3003000 Hz : 1500 mV : 40 or 50 dB : 10 W or more : 120600 MHz : 0.1 V32 mV (127 to 17 dBm) : 50 k/V DC or better : DC20 MHz : 0.0120 V : 10 mV10 V
RF power meter (terminated type)

Frequency counter

Frequency range : 0.1600 MHz Frequency accuracy : 1 ppm or better Sensitivity : 100 mV or better Frequency range Measuring range Input impedance : DC600 MHz : 0 to 5 kHz
FM deviation meter Digital multimeter
: 10 M/V DC or better AC millivoltmeter

s SYSTEM REQUIREMENTS

IBM PC compatible computer with an RS -232C serial port (38400 bps or faster) Microsoft Windows 95 or Windows 98 Intel i486DX processor or faster (Pentium 100 MHz or faster recommended) At least 16 MB RAM and 10 MB of hard disk space 640480 pixel display (800600 pixel display recommended)
s STARTING SOFTWARE ADJUSTMENT
q Connect IC-F4GT/GS and PC with the optional OPC-478 and the JIG cable. w Boot up Windows, and turn the transceiver power ON. e Click the program group CS-F3G ADJ in the Programs folder of the [Start] menu, then CS-F3G ADJs window is appeared. r Click the TCXO tag. t Click Connect on the CS-F3Gs window, then appears IC-F4GT/GSs up-to-date condition. y Set or modify adjustment data as desired.

s ADJUSTMENT SOFTWARE INSTALLATION
NOTE: Before using the program, make a backup copy of the original disk. After making a backup copy, keep the original disk in a safe place. q Boot up Windows. - Quit all applications when Windows is running. w Insert the backup disk1 into the appropriate floppy drive. e Select Run from the [Start] menu. r Type the setup program name using the full path name, then push the [Enter] key. (A:\ setup) t Follow the prompts. y Program group CS-F3G ADJ appears in the Programs folder of the [Start] menu. IBM is a registered trademark of International Bussiness Machines Corporation in the U.S.A. and other countries. Microsoft and Windows are registered trademarks of Microsoft Corporation in the U.S.A. and other countries. Screen shots produced with permission from Microsoft Corporation. All other products or brands are registered trademarks or trademarks of their respective holders.
ADJUSTMENT SOFTWARE'S SCREEN DISPLAY EXAMPLE
2 CS-F3G ADJ Rev.1.0 File Option COM 1: OPEN 1 [A / D] VIN LVIN SD BDET : 189 : BDh : : : 98 : 62h : 0 : 00h : 14 : 0Eh : 7. 41V 30. 35'C 1. 92V 0. 00V 0. 27V 5. 00V TEMPS : 186 : BAh : Connect Reload (F5) [D / A] BPF T1 : BPF T2 : BPF T3 : T4/POW : REF : DTCS BL: Dev : SQL Lev: Disp para TCXO 3

REMOT :

: 255 : FFh :

103 120

: 72h : 60h : 65h : 63h : 66h : 8Ch : 67h : 78h

: : : : : : : :

2. 24V 1. 88V 1. 98V 1. 94V 2. 00V 54. 90% 2. 02V 47. 06%
CH No. : Power (Hi) : Power (LO) :

(RX Freq

= 160.500, TX Freq = <

) RF Power :

[############] [####]
DTCS BAL : 140 [ # # # # # # # # # # # ] MOD : 117 [ # # # # # # # # # ] SQL : 120 [ # # # # # # # # # ] BPF ALL : [ Enter] to Start BPF BPF BPF BPF T1 : 70 T2 : 104 T3 : 112 T4 : 88 TXF : [#####] [###############] [################] [##########] to Start [ Enter ] [ Enter ] [ Enter ] [ Enter ] to to to to Sweep Sweep Sweep Sweep

[ Enter]

NOTE: The above values for settings are example only.
Each transceiver has its own specific values for each setting.
: Transceiver's connection state : Reload adjustment data : TCXO tag (must check for F4G adjustment) : Connected DC voltage : PLL lock voltage : Operating channel select : RF output power : DTCS wave form
9 : FM deviation 10 : Squelch level 11 : Receive sensitivity (automatically) 12 : Receive sensitivity (manually) 13 : Reference frequency 14 : Receive sensitivity measurement 15 : Adjustment items

JIG CABLE

( + SP) ( SPE) ( GND) 3-conductor 3.5(d) mm plug

to IC-F4GT/GS [SP] jack

JIG cable ( + CLONE)

OPC-478

CONNECTION Standard signal generator to the antenna connector 0.1 V to 32 mV (127 dBm to 17 dBm)

to [MIC]

Audio generator

CAUTION:

DO NOT transmit while SSG is connected to the antenna connector.
to an RS-232C port Personal computer

FM deviation meter

Attenuator 40 dB or 50 dB RF power meter 0.110 W/50

DB9 female plug

(incl. level converter circuit)

Speaker (8 )

to [SP]

SINAD meter

JIG cable
DC POWER CABLE CONNECTIONS SOFTWARE ADJUSTMENT + DC POWER SUPPLY + DC POWER SUPPLY Soldering DC cable here PLL ADJUSTMENT

Top view

5-2 PLL ADJUSTMENT
MEASUREMENT ADJUSTMENT PLL LOCK VOLTAGE ADJUSTMENT CONDITIONS UNIT 1 Operating frequency: 440.000 MHz Receiving 2 Transmitting 3 Operating frequency: 470.000 MHz Receiving 4 Transmitting LOCATION 1.3 V 1.3 V 3.04.5 V 3.04.5 V MAIN Connect a digital multi meter to check point LV. VALUE UNIT ADJUST MAIN L11 L405 Verify ADJUSTMENT

MAIN unit

RF power meter

L405 L11

PLL lock voltage adjustment
PLL lock voltage check point

Bottom view

5-3 SOFTWARE ADJUSTMENT
Select an operation using [] / [] keys, then set specified value using [] / [] keys on the connected computer keyboard. ADJUSTMENT REFERENCE FREQUENCY [TXF] ADJUSTMENT CONDITION MEASUREMENT UNIT LOCATION VALUE 440.0000 MHz
1 Operating frequency: 440.000 MHz Top Loosely couple a frequnecy High/Low switch : Low panel counter to the antenna connec Connect the RF power meter or 50 tor. dummy load to the antenna connector. Transmitting 1 Operating frequency: 470.000 MHz High/Low switch : Low Transmitting 2 High/Low switch Transmitting : High Top Connect an RF power meter to panel the antenna connector.

OUTPUT POWER [POWER(LO)] [POWER(HI)] FM DEVIATION [MOD]

4.0 W 2.0 kHz

1 Operating frequency: 440.000 MHz Top Connect an FM deviation meter High/Low switch : Low panel to the antenna connector Connect the audio generator to the through the attenuator. [MIC] jack and set as: 1.0 kHz/150 mVrms Set the FM deviation meter as: HPF : OFF LPF : 20 kHz De-emphasis : OFF Detector : (PP)/2 Transmitting 1 Operating frequency: 470.000 MHz High/Low switch : Low No audio applied to the [MIC] jack. DTCS code : 007 Transmitting Top Connect an FM deviation meter panel with an oscilloscope to the antenna connector through an attenuator.
DTCS WAVE FORM [DTCS BAL]

Set to flat wave form

SOFTWARE ADJUSTMENT continued
Select an operation using [] / [] keys, then set specified value using [] / [] keys on the connected computer keyboard. ADJUSTMENT RX SENSITIVITY [BPF T1] [BPF T4] ADJUSTMENT CONDITION MEASUREMENT UNIT LOCATION VALUE
Top Connect a SINAD meter with an Minimum distortion 1 Operating frequency: 440.000 MHz level Connect a standard signal generator to panel 8 load to the [SP] jack. the antenna connector and set as: Frequency : 440.000 MHz Level : 10 V* (87 dBm) Modulation : 1 kHz Deviation : 1.75 kHz Receiving
CONVENIENT: The BPF T1BPF T4 can be adjusted automatically.
q-1: Set the cursol to BPF ALL on the adjustment program and then push [ENTER] key. q-2: The connected PC tunes BPF T1BPF T4 to peak levels. or w-1: Set the cursol to one of BPF T1, T2, T3, or T4 as desired. w-2: Push [ENTER] key to start tuning. w-3: Repeat w-1 and w-2 to perform additional BPF tuning. SQUELCH LEVEL [SQL] Top Connect a SINAD meter with an 1 Operating frequency: 440.000 MHz Connect a standard signal generator to panel 8 load to the [SP] jack. the antenna connector and set as: Frequency : 440.000 MHz Level : 0.2 V* (121 dBm) Modulation : 1 kHz Deviation : 1.75 kHz Receiving 2 Receiving 12 dB SINAD
At the point where the audio signals just appears.
*The output level of the standard signal generator (SSG) is indicated as the SSGs open circuit.

SECTION 6 PARTS LIST

[MAIN UNIT]

REF NO.

IC1 IC2 IC3 IC4 IC5 IC6 IC7 IC8 IC10 IC11 IC12 IC13

7030005310

R170 R171 R174 R176 R177 R178 R181 R182 R184 R185 R186 R190 R191 R192 R193 R194 R195 R196 R197 R198 R199 R200 R202 R203 R204 R205 R207 R208 R209 R210 R211 R212 R213 R215 R216 R218 R219 R220 R221 R223 R224 R225 R226 R227 R228 R229 R230 R231 R232 R234 R235 R236 R237 R238 R239 R240 R241 R242 R243 R244 R245 R246 R251 R252 R253 R257 R258 R260 R261 R262 R401 R402 R404 R405 R410 R411 R413 R414 R416 R417 R420 R421
S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.THERMISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.ARRAY S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.ARRAY S.RESISTOR S.RESISTOR S.ARRAY S.ARRAY S.ARRAY S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR
ERJ3GEYJ 103 V (10 k) ERJ3GEYJ 473 V (47 k) ERJ3GEYJ 153 V (15 k) ERJ3GEYJ 392 V (3.9 k) ERJ3GEYJ 102 V (1 k) RR0816P-332-D (3.3 k) RR0816R-104-D (100 k) NTCCM20124AG473J-T ERJ2GEJ 103 X (10 k) ERJ2GEJ 102 X (1 k) ERJ2GEJ 473 X (47 k) ERJ3GEYJ 223 V (22 k) ERJ3GEYJ 223 V (22 k) ERJ3GEYJ 223 V (22 k) ERJ3GEYJ 104 V (100 k) ERJ3GEYJ 104 V (100 k) ERJ3GEYJ 104 V (100 k) ERJ3GEYJ 104 V (100 k) ERJ3GEYJ 224 V (220 k) ERJ3GEYJ 183 V (18 k) ERJ3GEYJ 473 V (47 k) ERJ3GEYJ 473 V (47 k) ERJ2GEJ 473 X (47 k) ERJ3GEYJ 473 V (47 k) ERJ3GEYJ 332 V (3.3 k) ERJ3GEYJ 152 V (1.5 k) ERJ3GEYJ 473 V (47 k) ERJ3GEYJ 104 V (100 k) ERJ3GEYJ 104 V (100 k) ERJ3GEYJ 222 V (2.2 k) ERJ3GEYJ 124 V (120 k) ERJ3GEYJ 683 V (68 k) ERJ3GEYJ 471 V (470 ) RR0816R-104-D (100 k) RR0816R-104-D (100 k) ERJ3GEYJ 124 V (120 k) ERJ3GEYJ 124 V (120 k) ERJ3GEYJ 334 V (330 k) ERJ3GEYJ 394 V (390 k) ERJ2GEJ 124 X (120 k) ERJ3GEYJ 273 V (27 k) ERJ3GEYJ 104 V (100 k) EXB-V8V 102JV ERJ2GEJ 473 X (47 k) ERJ3GEYJ 103 V (10 k) ERJ3GEYJ 184 V (180 k) ERJ3GEYJ 563 V (56 k) ERJ3GEYJ 223 V (22 k) EXB-V8V 102JV ERJ3GEYJ 223 V (22 k) ERJ3GEYJ 684 V (680 k) EXB-V8V 102JV EXB-V8V 102JV EXB-V8V 102JV ERJ3GEYJ 102 V (1 k) ERJ3GEYJ 102 V (1 k) ERJ3GEYJ 105 V (1 M) ERJ3GEYJ 105 V (1 M) ERJ3GEYJ 105 V (1 M) ERJ2GEJ 104 X (100 k) ERJ3GEYJ 104 V (100 k) ERJ3GEYJ 104 V (100 k) ERJ3GEYJ 334 V (330 k) ERJ3GEYJ 472 V (4.7 k) ERJ3GEYJ 471 V (470 ) ERJ3GEYJ 1R0 V (1 ) ERJ3GEYJ 333 V (33 k) ERJ3GEYJ 103 V (10 k) ERJ3GEYJ 103 V (10 k) ERJ3GEYJ 1R0 V (1 ) ERJ3GEYJ 104 V (100 k) ERJ3GEYJ 473 V (47 k) ERJ3GEYJ 224 V (220 k) ERJ3GEYJ 103 V (10 k) ERJ3GEYJ 332 V (3.3 k) ERJ3GEYJ 272 V (2.7 k) ERJ3GEYJ 4R7 V (4.7 ) ERJ3GEYJ 391 V (390 ) ERJ3GEYJ 332 V (3.3 k) ERJ3GEYJ 332 V (3.3 k) ERJ3GEYJ 471 V (470 ) ERJ2GEJ 103 X (10 k)

MECHANICAL PARTS AND DISASSEMBLY

[ACCESSORIES]

DESCRIPTION QTY. [F4GT] [F4GS] REF. NO. ODER NO. EP1 MP1 MP2 DESCRIPTION QTY. Antenna FA-SC57U Belt clip OPT sheet
2251-T front panel 2251-S front panel 2251 terminal holder 2251 chassis 2251 rear panel 2251 release button 2251 window plate 2251 jack rubber 2251 jack panel Knob N-main seal 2251 10key 2251 6key 2251 minus terminal 2251 plus terminal 2251 spring holder 1922 mic sheet 2251 mic sponge 2251 opt sheet 1903 hex nut 2251 window sheet Spring Ant connector-102 Ant connector-101 Screw BT M2 x 4 NI-ZU Screw BT M2 x 6 ZK Screw M2 x 4 ZK 2251 contact rubber 2251 jack cap 2251 contact spring 2251 ANT rug 2252 shield plate Aluminum sheet

[F4GT] [F4GS]

REF. NO. ODER NO. DS1 SP1 EP2 MP1 MP3 MP4 MP5 MP6 MPLM-7045B 2510001060 Speaker K036NA500-LCD contact SRCN-2251-SP-N-W 1922 VCO case-LCD holder 2251 reflector 2078 PA heatsink 1923 VCO cover Shield sponge (d) DESCRIPTION QTY. 1

Screw abbreviations

A, B0, BT: Self-tapping PH: Pan head FH: Flat head BiH: Bind head SUS: Stainless NI: Nickel ZK: Black
MP33 (C) MP39 (C) MP32 (C) MP23 (C) MP3 (C)

MP26 (C) MP33 (C)

MP31 (C) MP15 (C) MP2 (C) MP31 (C) MP14 (C)

MP32 (C)

MP4 (C) MP25 (C) MP5 (C)

MP12 (C)

MP38 (C) MP5 (M) MP8 (M) MP6 (M) MP1 (M) MP36 (C) MP8 (C) MP9 (C) MP31 (C) MP32 (C) MP41 (C) MP33 (C) MP22 (C) MP32 (C) MP18 (C) MP32 (C) MP42 (C) MP10 (C) MP27 (C) SP1 (M) MP31 (C) MP31 (C)

MP37 (C)

IC-F4GS parts

MP1 (C)

MP4 (M) EP2 (M) DS1 (M) MP3 (M) MP21 (C) MP20 (C) MP31 (C)
MP24 (C) MP7 (C) MP13 (C) MP13 (C) MP1 (C)
UNIT abbreviation (C): CHASSIS PARTS, (M): MAIN UNIT

SECTION 8

TRANSISTOR AND FETS

2SA1577 Q (Symbol: HQ)

SEMI-CONDUCTOR INFORMATION
2SB1201 S (Symbol: B1201)

2SB1132 R (Symbol: BARB)

2SC2712 GR (Symbol: LG)
2SC3585 R44 (Symbol: R44)

2SC4116 GR (Symbol: LG)

2SC4215 O (Symbol: QO)

2SC5085 Y (Symbol: MCY)

2SC5107 O (Symbol: MFO)

2SJ364 Q (Symbol: 4MQ)

2SK2973 (Symbol: K1)

G S D S

2SK2974 (Symbol: K2974)

D S G (top view)

2SK880 Y (Symbol: XY)

3SK239 A (Symbol: XR)

DTA144 EU (Symbol: 16)

DTC144 EE (Symbol: 26)

DTC144 EU (Symbol: 26)

DTC144 TU (Symbol: 06)

D403 C411

C71 R50 C566 W10

R128 C152 C219 D26

R531 R153
C228 R203 C227 C151 R127 R120 R207

C149 R126 C146

R221 Q36

R123 C140 R122 R121

R517 C216

R165 R164

Q15 C145

C248 R220 R140

R145 Q16 C139 L33

C250 L442 Q38

C72 C236 R231 R230 R225 R228 R501 R208 C229 R500 R209 C221 R190

C211 + R191

R218 R246

R192 C225

C222 C245
C195 R146 C550 + + C154 C197

C232 R181

C564 C202 C249 R216 C194
R215 C231 C193 R101 R103 D14 C196 R102 R147 R226
Q33 R199 R240 R213 R532 R238 R239 C200 R198 R197 R211 R200 Q404 R212

+ C198 +

R533 R196 R193 R194 R195 R131 R232 C199 C144 IC11 C230 C554 Q17 R130 C209 C563 R241 R242 R235

C147 C223

R516 R243

C224 C562 R171

R510 R137

C OPTION

R136 C567

J5 to the OPTIONAL unit

GND 5V VCC MICMUTE AFONOP BEEPOUT RXMUTE DISCIN AFOUT REM CCS CIRQ SO SI SCK
PTTIN PTTOUT MICOUT MICIN AUX BUSY MOWN SIGOUT OPT1 OPT2 OPT3 GND OPV3 OPV2 OPV1

J5 B5387B

SECTION 10

10-1 PARTS LIST

REF. NO. ODER NO. Q1 Q2 Q3 Q4 D1 D2 D3 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 C1 C2 C3 C4 J1 J2 DS1 W1 EP1 EP2 MP1530001950
BC-137 OPTIONAL DESKTOP CHARGER INFORMATION
10-2 DISASSEMBLY INFORMATION
DESCRIPTION S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR 2SB1201-S-TL RN2402 (TE85R) RN1409 (TE85R) 2SC2712-GR (TE85R) 1SS355 TE-17 1SS184 (TE85R) MA8056-M (TX) MCR10EZHF 24R0 (240) MCR10EZHF 24R0 (240) MCR10EZHJ 27 (270) MCR10EZHJ 10 k MCR10EZHJ 10 k MCR10EZHJ 27 (270) MCR10EZHJ 2 k MCR10EZHJ 2 k MCR10EZHJ 56 k MCR10EZHJ 10 k MCR10EZHJ 1 k GRM40 F 104Z 25PT GRM40 F 104Z 25PT GRM40 F 104Z 25PT GRM40 F 104Z 25PT HEC0470-01-230 HEC0470-01-230 TLG124A MCR18EZHJ JPW (000) B 5493B TLE60-05

QTY. 3

MP3 (C)
1750000550 S.DIODE 1750000020 S.DIODE 1790000950 S.ZENER 4030001150 S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.CERAMIC S.CERAMIC S.CERAMIC S.CERAMIC

MP1 (M)

6510021470 CONNECTOR 6510021470 CONNECTOR 5040001390 LED 7030003970 S.JUMPER 0910052602 PCB 6910012240 SPACER TERMINAL

MP2 (C)

MP4 (C) MP5 (C) MP4 (C)

MP4 (C)

NOTE: (C) : CHASSIS (M) : MAIN UNIT

[CHASSIS UNIT]

REF. NO. ODER NO. MP1 MP2 MP3 MP4 MPDESCRIPTION 2338 case 2338 cover 2327 spacer Leg cushion (A) Screw BT M3 x 8 NI-ZU QTY. 1

CONVENIENT:

BC-137 is connectable max. 6 pieces in parallel. When connect BC-137 in parallel, JIG cable (as shown below) is required.

CONNECTION

AC adaptor (BC-122) or DC power supply
Screw abbreviations BT : Self-tapping NI : Nickel J2 J1 J2 J1 J2 J1 BC-137 BC-137 Max. 6 pieces of BC-137 BC-137

Count on us!

INSTRUCTION MANUAL
VHF TRANSCEIVER UHF TRANSCEIVER

iF3GT/GS iF4GT/GS

This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

IC-F3/4GS series

A-5621D-1EX-r Printed in Japan 1999 Icom Inc.
1-1-32 Kamiminami, Hirano-ku, Osaka 547-0003 Japan

FOREWORD

Thank you for purchasing the IC-F3GT/GS, IC-F4GT/GS FM transceiver. READ ALL INSTRUCTIONS carefully and completely before using the transceiver. SAVE THIS INSTRUCTION MANUALThis instruction manual contains important operating instructions for the transceiver.

TABLE OF CONTENTS

FOREWORD.i IMPORTANT.i TABLE OF CONTENTS.ii 1 PANEL DESCRIPTION.13 Switches, controls, keys and connectors.12 Function display.ACCESSORIES.BATTERY PACKS.510 Battery pack replacement.5 Battery cautions.6 Battery charging.7-8 Charging NOTE.9 Battery case (Option).PROGRAMMABLE FUNCTIONS.11-15 Receiving and transmitting.CONVENTIONAL OPERATION.16-18 Call procedure.17 Tx code channel selection.18 Manual 5-tone codes.18 Transmitting notes.SMARTRUNK IITM OPERATION.19-21 Basic operation.OTHER FUNCTIONS.22 DTMF pager/Code squelch.MAINTENANCE.23 Optional UT-105/UT-108/UT-109 and UT-110 installation.CLONING.24-OPTION.26-MEMO.28

IMPORTANT

R CAUTION! NEVER hold the transceiver so that the antenna is very close to, or touching exposed parts of the body, especially the face or eyes, while transmitting. The transceiver will perform best if the microphone is 2 to 4 in. (5 to 10 cm) away from the lips and the transceiver is vertical. R CAUTION! NEVER operate the transceiver with a headset or other audio accessories at high volume levels. R CAUTION! NEVER short the terminals of the battery pack. DO NOT push the PTT when not actually desiring to transmit. AVOID using or placing the transceiver in direct sunlight or in areas with temperatures below +14F (10C) or above +122F (+50C). DO NOT modify the transceiver for any reason. KEEP the transceiver from the heavy rain, and NEVER immerse it in the water. The transceiver construction is water resistant, not water proof. The use of non-Icom battery packs/chargers may impair transceiver performance and invalidate the warranty. FCC caution: Changes or modications to this transceiver, not expressly approved by Icom Inc., could void your authority to operate this transceiver under FCC regulations.

PANEL DESCRIPTION

Switches, controls, keys and connectors

w e r t y u

Speaker o Mic !0

P0 P1 P2 P3

D Programmable key reference
q VOLUME CONTROL [OFF/VOL] Turns power ON and adjusts the audio level. w DEALER-PROGRAMMABLE KEY [S1 (Red)] e PTT SWITCH [PTT] Push and hold to transmit; release to receive. r DEALER-PROGRAMMABLE KEY [S2(Black)] Y Z t UP/DOWN KEYS [Y]/[Z] Push to select the operating channel. Can be programmed as [ M ]/[ # ]. (SmarTrunk mode only) y DEALER-PROGRAMMABLE KEYS [P0]/[P1]/[P2]/[P3] Can each be programmed for one of several functions by your Icom Dealer. u 10-KEY PAD (IC-F3GT/IC-F4GT only) Used to enter DTMF codes, the operating channel, etc. i ANTENNA CONNECTOR Connects the supplied antenna. o [SP]/[MIC] JACK Connect optional speaker-microphone. !0 FUNCTION DISPLAY Displays the following information: CH number. 5-tone indication. Low-battery indication. DTMF numbers. Low-power indication. Skip-Ch indication. Audible indication. NOTE: Above functions depend on pre-setting.

S1 (Red) S2 (Black)

P0 P1 P2 P3 2

ACCESSORIES

Accessory attachment

D Supplied accessories

Function display

q w e r ty u i

The transceiver comes supplied with the following accessories. q Flexible antenna w Belt clip e 2251 OPT sheet (See p. 26)
o q TRANSMIT INDICATOR Appears during PTT on. w BUSY INDICATOR Appears while receiving a signal or when the squelch is open. e LOW POWER INDICATOR (p. 12) Appears when low output power is selected. r SCRAMBLER INDICATOR Appears while the scrambler function is operating. t KEY LOCK INDICATOR (p. 12) Appears during key lock function ON. y BELL INDICATION Appears or blinks when the optional 2/5Tone call is received. u AUDIBLE INDICATOR Appears when monitor function is turned ON. (CTCSS and DTCS mutes are released.) i LOW BATTERY INDICATOR [ ] -When appears, battery capacity is low and transmitting is impossible. - When ashes, battery capacity is nearly exhausted. o ALPHANUMERIC INDICATOR
D Antenna The antenna screws onto the transceiver as illustrated right. Keep the jack cover attached when jacks are not in use to avoid bad contacts.
D Belt clip Attach the belt clip to the transceiver as illustrated below.
To attach the belt-clip To release the belt-clip

BATTERY PACKS

Battery cautions

Battery pack replacement

Before replacing the battery pack, the volume control MUST be rotated fully counterclockwise, until a click is heard, to turn the power OFF. Push the battery release forward, then pull the battery pack upward with the transceiver facing you.

D BATTERY PACKS

Charging period Battery Voltage Capacity pack BC-146 BC-121 or BC-144 Operating period*1
CAUTION! NEVER short the terminals of the battery pack (or charging terminals of the transceiver). Also, current may ow into nearby metal objects such as a necklace, so be careful when placing battery packs (or the transceiver) in handbags, etc. Simply carrying with or placing near metal objects such as a necklace, etc. causes shorting. This will damage not only the battery pack, but also the transceiver. NEVER incinerate used battery packs. Internal battery gas may cause an explosion. NEVER immerse the battery pack in water. If the battery pack becomes wet, be sure to wipe it dry BEFORE attaching it to the transceiver. Clean the battery terminals to avoid rust or miss contact. Keep battery contacts clean. Its a good idea to clean battery terminals once a week. If your battery pack seems to have no capacity even after being charged, completely discharge it by leaving the power ON overnight. Then, fully charge the battery pack again. If the battery pack still does not retain a charge (or only very little charge), a new battery pack must be purchased. (P. 9)

Battery case for AA BP-208*2 (R6) 6 alkaline BP-209 BP-210 7.2 V 7.2 V 1100 mAh 1650 mAh 12 hrs 18.5 hrs 1.5 hrs 2.0 hrs

*hrs 11 hrs

*1 Operating periods are calculated under the following conditions; Tx : Rx : standby =5 : 5 : 90 *2 Output power is automatically reduced to 1 W to retains sufcient power 1100 in case of emergency, etc. *3 Operating period depends on the alkaline cells used.
D Recycling information (U.S.A. only) The product that you have purchased contains a rechargeable battery. The battery is recyclable. At the end of its life, under various state and local laws, it may be illegal to dispose of this battery into the municipal waste stream. Call 1-800-822-8837 for battery recycling options in your area or contact your dealer.

Battery charging

D Rapid charging with the BC-144 The optional BC-144 provides rapid charging of optional battery packs. The following are additionally required: One AD-99 and an AC adapter (depending on version).
Turn power OFF. Check orientation for correct charging. (Insert together with AD-99.)
D Rapid charging with the BC-121+AD-94 (#11) The optional BC-121 allows up to 6 battery packs to be charged simultaneously. The following are additionally required. Six AD-94 (#11). An AC adapter (may be supplied with the BC-121 depending on version).

Turn power OFF.

BC-144 + AD-99
The BC-144 cannot be used in a vehicle, because the charger requires 16 V DC input.

AC adapter

(purchased separately)

Charge indicator

(each indicator functions independently)
D Spacer combination. Be sure to attach the spacer (Spacer B/C) to the adapter (Spacer A) with the orientation as illustrated in the diagram at right. Attach the spacer (Spacer B/C) to the adaptor with the orientation of the stamp pointing up. NOTE: Push the notch carefully when removing the spacer from the adaptor.
Check orientation and Spacer A

Spacer B/C

D Regular charging with Turn power OFF. the BC-137 #11/BC-146 The optional BC-137 #11 or BC-146 provides regular charging of optional battery pack with/without transceiver. The following is additionally required: An optional AC adapter.
(AD-99 is supplied with BC137 #11/BC-146)
Check orientation for correct charging. (Insert together with AD-99.)

BC-137 #11 or BC-146

Charging NOTE
Prior to using the transceiver for the rst time, the battery pack must be fully charged for optimum life and operation. Recommended temperature range for charging: +10C to +40C (50F to 140F). Use the supplied charger or optional charger (BC-121/BC-144 for rapid charging, BC-137 #11/BC-146 for regular charging) only. NEVER use other manufacturers chargers. The optional BP-209 or BP-210 battery packs include rechargeable Ni-Cd (Ni-MH: BP-210) batteries and can be charged approx. 300 times. Charge the battery pack before rst operating the transceiver or when the battery pack becomes exhausted. If you want to charge the battery pack more than 300 times, the following points should be observed: Avoid over charging. The charging period should be less than 20 hours. Use the battery until it becomes almost completely exhausted under normal conditions. We recommend battery charging after transmitting becomes impossible. D Battery pack life When the operating period becomes extremely short even after charging the battery pack fully, a new battery pack is needed.

Battery case (Option)

When using a BP-208 OPTIONAL BATTERY CASE attached to the transceiver, install 6 AA (R6) size alkaline batteries as illustrated below. NOTE: Output power is automatically reduced to 1 W to retains sufcient power in case of emergency, etc.
D CAUTIONS Use ALKALINE batteries only. Make sure all battery cells are the same brand, type and capacity. Never mix old and new batteries. Either of the above may cause a fire hazard or damage the transceiver. If ignored. Never incinerate used battery cells since internal battery gas may cause them to rupture. Never expose a detached battery case to water. If the battery case gets wet, be sure to wipe it dry before using.

PROGRAMMABLE FUNCTIONS

General
In the following explanations, programmable function names are bracketed, the specic switch used to activate the function depends on programming. D KEYPAD LOCK FUNCTION This function locks access to all programmable switches (except the switch assigned for the lock function). : Push and hold the [LOCK] switch for 1 sec. to toggle the lock function ON and OFF. appears while the lock function is ON. This function may be inhibited on some channels. D PRIORITY CHANNEL This function is used to select a pre-programmed channel at the push of a switch. Push the [PRIORITY] switch to select the priority channel. PRIO appears briey, then the priority channel is automatically selected. D SCAN FUNCTION The scan function allows you to search a pre-programmed group of channels for signals. Push the [SCAN] switch to start/stop scan. Scan pauses on a channel when receiving a signal. Depending on programming, a message may appear while scanning. Lockout SCAN (pre-programmed list SCAN) or Priority SCAN can be pre-programmed. When the Power-save function is activated, the transceiver
checks all pre-programmed channels then returns to the Powersave function again. D HIGH/LOW POWER OUTPUT This function selects high or low power for a channel. Push the [HIGH/LOW] switch to toggle between high and low power. LOW appears when low output power is selected. D SCRAMBLER FUNCTION (optional UT-109 #01* or UT-110 #01* is required.) This function provides higher communication security. UT-109: Non-rolling type. 32 code numbers are available. UT-110: Rolling type. 1020 (4 group 255) code numbers are available. Push the [SCRM] switch to toggle the function ON and OFF. NOTE: NEVER use #02 High AF level versions, as they are not compatible D BEEP FUNCTION This function provides confirmation beep tones when pushing switches. Push the [BEEP] switch to toggle the function ON and OFF.
D MONITOR AUDIBLE FUNCTION The monitor function allows you to open the transceivers squelch manually to check whether a channel is busy or not. The transceiver has 2 conditions for receive standby: Audible condition: This condition mutes audio ONLY when no carrier is present. You can receive (or monitor) any signals on a channel. Push and hold the [MONI/AUDI], switch to select the audible condition. Any audio mute functions are cancelled while pushing the [MONI/AUDI] switch. Inaudible condition: This condition mutes ALL signals except those directed to you. Therefore you should check a channels condition (busy or not) with the monitor function before transmitting. Push the [MONI/AUDI] switch momentarily to select the inaudible condition.

D DTMF TRANSMISSION This function allows you to send a pre-programmed DTMF code to control a repeater, open another transceivers squelch, etc. Manual transmission: Push desired digit keys in sequence while pushing [PTT]. Pushing [PTT] may not be necessary depending on programming. Automatic pre-programmed transmission: q Push the [DTMF] switch to select DTMF autodial mode, then push [Y] or [Z] to select the desired channel. w Push the [DTMF] switch once more to send a DTMF code. D DTMF RE-DIAL FUNCTION This function allows you to transmit the last-used DTMF code at the push of a key. Push the [DTMF RE-DIAL] switch momentarily to activate the function. The previously transmitted DTMF code is automatically transmitted. If no code has been transmitted since turning the power ON, this function does not activate. D EMERGENCY FUNCTION The emergency function allows you to send your ID quickly and easily to your Base Station, etc. in case of emergency. Push and hold the [EMERGENCY] switch for 1 sec. to activate the emergency function. The transceiver selects a pre-programmed channel, then sends an emergency signal to your Base Station. The pre-programmed channel remains selected until a control signal is received from the Base Station, or power is turned OFF.

All signals are received

Only signals containing the proper tone are received
D TALK AROUND The talk around function changes duplex channels to simplex channels. Duplex allows you to contact your base station, repeaters, etc. Simplex allows you to contact other portable transceivers directly (portable-to-portable contact). Push the [TALK AROUND] switch one or more times to toggle the function ON and OFF.

CONVENTIONAL OPERATION

Receiving and transmitting
The emergency call is repeatedly transmitted at pre-programmed intervals. D DISPLAY LIGHTING The function display has 3 backlight conditions. OFF : No backlight is available. AUTO : When any key is pushed, the backlight turns ON for 5 sec. automatically. CONTINUOUS : Backlight turns ON continuously. D SmarTrunk II functions This transceiver provides SmarTrunk II functions. (Optional UT-105 SmarTrunk II Logic Board is required.) The optional UT-105 allows communication over conventional channels or SmarTrunk II channels. Select a channel bank for SmarTrunk II before trunking operation. To toggle SmarTrunk II channels and conventional channels. Push the [Bank Up] switch one or more times. Scanning starts when a channel bank for SmarTrunk II is selected. Contact your dealer for channel bank details. (See p.21 for more detailed operation.)

NOTE: Transmitting without an antenna may damage the transceiver. See p.1 for antenna attachment. Turn power ON as described on p. 1. Receiving: q Push [Y]/[Z] to select a channel. w Listen for a transmission and adjust [VOL] to a comfortable listening level. When no transmission is heard, push and hold monitor while adjusting [VOL] (your transceiver may not be programmed with the monitor function). The transceiver is now set to receive desired calls on the selected channel. Transmitting: Wait for the channel to become clear to avoid interference. e While pushing and holding [PTT], speak into the microphone at a normal voice level. When a tone signalling system is used, the call procedure described at right may be necessary. r Release [PTT] to return to receive. IMPORTANT: To maximize the readability of your transmitted signal, pause a few sec. after pushing [PTT], hold the microphone 10 to 15 cm from your mouth and speak at a normal voice level.

Call procedure

When your system employs tone signalling (excluding CTCSS and DTCS), the call procedure may be necessary prior to voice transmission. The tone signalling employed may be a selective calling system which allows you to call specic station(s) only and prevent unwanted stations from contacting you. q Select the desired Tx code channel or 5-tone code according to your System Operators instructions. This may not be necessary depending on programming. Refer to the next page for selection. w Push the call switch (assigned to one of the dealer programmable switches: [P0], [P1], [P2], [P3], [S1] and [S2]). e After transmitting a 5-tone code, the remainder of your communication can be carried out in the normal fashion.
Tx code channel selection
Your radio may be programmed for Tx code channel selection. In this case, you can choose a Tx code channel to be transmitted when using the call function (p. 7). Push the Tx code channel switch (assigned to one of the dealerprogrammable switches) to activate the function, then enter digits via the keypad to select the desired Tx code channel. The selected code channel (containing a pre-programmed 5-tone code) is transmitted when using the call function.

Manual 5-tone codes

Depending on programming, you may be able to send 5-tone codes manually. Push the Tx code switch to activate the function, then enter the desired transmit code (up to 7 digits) using the keypad. Activate the call function to transmit the 5-tone code. Blinking indicates keypad entry is acceptable.

Selective calling

Non-selective calling

Transmitting notes

D TIME-OUT TIMER After continuous transmission for a pre-programmed period, the time-out timer is activated, causing the transceiver to stop transmitting and automatically select receive.
D PENALTY TIMER Once the time-out timer is activated, transmission is further inhibited for a period determined by the penalty timer.

SmarTrunk IITM OPERATION

Basic operation
These features are enabled by your Dealer or System operator and may not be available in your system. Contact your Dealer for details. Push the [Bank Up] switch one or more times to select a channel bank for conventional channels or SmarTrunk II channels. Scanning starts when a channel bank for SmarTrunk II is selected. D PTT dispatch operation *1 q Push [PTT] once (without dialling) to initiate a dispatch call. w Begin talking after you hear three beeps (one short, highpitched, two very-short, low-pitched). e Receiving a dispatch call is indicated by the same three-beep sequence. It is not necessary to push [M] to answer a dispatch call. D System busy indication If all channels are busy, three low beeps sound after you initiate a call. Try the call again later. D Receiving a subscriber-to-subscriber call *1 When you hear ringing, push [M] to answer. For a group call, you hear a short ring followed by two short beeps. You do not have to answer a group call to hear it over the air. D Receiving a landline-to-subscriber call *1 When you hear ringing, push [M] to answer. For a group call, you hear a short ring followed by two short beeps. You do not have to answer a group call to hear it over the air.
D Terminating a call *1 After completing a call, push [#] to disconnect (hang up). IMPORTANT: If one person in the conversation terminates a call, all participants will be cut off. D Last number redial *1 Push [M], [M] to automatically redial the last number called. A high-pitched beep indicates that the number is accepted. *1: This function is available to for the IC-F3GS/IC-F4GS when the [Y]/[Z] keys are assigned the [M]/[ # ] key functions. D Turbo SpeeDial To automatically dial a commonly used number with one push: Push one of the turbo SpeeDial keys. D Programming memory speed dial q Push and hold [M] until you hear a high-pitched beep. w Enter the memory location (09, A, B, C, D), the telephone or subscriber number, then [1], [M] (or [3], [M] if for another system subscriber). A high-pitched beep indicates successful programming. Memories [A][D] are used for the Turbo SpeeDial. NOTE: This function is available for the IC-F3GT/IC-F4GT only. D Memory speed-dialling *2 To automatically dial a commonly used number from memory: Push [M] followed by the memory location (09).

OTHER FUNCTIONS

DTMF PAGER/CODE SQUELCH
D Clear channel alerting If all channels are busy, the transceiver automatically begins searching for an open channel and beeps every ten seconds. When two short beeps (low-pitched, then high-pitched) are heard, a channel is available. Push [M], [M] immediately to redial the last number. D Emergency call Push [0], [M] to initiate an emergency call. Contact your Dealer for details.
When you install optional the UT-108 DTMF DECODER UNIT into the transceiver, DTMF pager function or code squelch function will be available. D DTMF pager This function uses DTMF tones for calling and can be used as a common pager to inform you that one of your group has called even if the operator is temporarily away from the transceiver. When the connection code is received, a beep sounds, then flashes and shows the called stations code number. Called stations code number are memorised automatically, and are easy to re-call with ID-MR select function. D Code squelch This conveniently eliminates unwanted audio and is useful in group activities or security related activities where unwanted output can be a problem. The function is similar to a CTCSS tone squelch. In order to use the above functions, cloning is necessary via a PC using the optional CS-F3G cloning software. Using this software, the transceivers model, individual RX Code CH, TX Code CH, Special Tone Link2 (must be E) on 5Tone screen, 5Tone Signaling Form on Memory-CH screen, Log, RX C-No, Key&Display, Common AutoReset TimerB, and other settings related to operation can be set. Refer to the HELP file that comes with the CS-F3G CLONING SOFTWARE for available settings.
D Placing a telephone call *2 Enter the phone number followed by [1], [M]. A high-pitched beep indicates that the number is accepted. When the called party answers, push the [PTT] switch to talk, and release it to listen. D Calling another local system subscriber *2 Enter the subscriber number followed by [3], [M]. A high-pitched beep indicates that the number is accepted. You hear ringing, then two short beeps when the subscriber answers. If the other subscriber is on another call or out of range, you hear a fast busy signal and the call terminates automatically. *1: This function is available for the IC-F3GS/IC-F4GS when the [Y]/[Z] keys are assigned the [M]/[ # ] key functions. *2: This function is available for the IC-F3GT/GS,IC-F4GT/GS only. Use the Turbo SpeeDial function instead. For additional operating instructions, contact your Dealer or System Operator.

MAINTENANCE

Cloning

CLONING

Optional UT-96/ UT-105/ UT-108/ UT-109/ UT-110/ UT-111 and UT-113 installation

You can install one of the following optional signaling units in the transceiver. UT-96 2TONE/5TONE UNIT, UT-105 SmarTrunk(TM) Logic Board, UT-108 DTMF DECODER UNIT, UT-109/ UT-110 SCRAMBLER UNIT , UT-111 TRUNKING BOARD or UT-113 MAN DOWN UNIT. q Remove the optional connecter access cover (named 2251 OPT sheet). Insert a screwdriver into the
hollow of the chassis, then lift and take away the cover. (The cover can not be used again.)
Cloning allows you to quickly and easily transfer the programmed contents from one transceiver to another transceiver; or data from PC to a transceiver using the optional CS-F3G CLONING SOFTWARE. D Transceiver-to-transceiver cloning q Connect the optional OPC-474 CLONING of the master and slave transceivers.

to the [SP] jack

The master transceiver is used to send data to the slave transceiver.
Y w While pushing [P0] and [Y], turn the transceivers power on to enter cloning mode (For both the master transceiver and slave transceiver). CLONE appears and the transceiver enters the clone standby

condition.

w Attach the desired optional unit. Insert the connector tightly to avoid a bad contact. e Remove the paper backing of 2251 OPT sheet supplied as an accessory. r Attach the new 2251 OPT sheet to the service window. t Program the necessary information with the cloning software before operation. r Please ask your dealer or system operator for details.
e Push [PTT] on the master transceiver. CLOUT appears in the master transceivers display. CL IN appears automatically in the slave transceivers display. When cloning is finished, CLONE appears in the master transceivers display. NOTE: DO NOT push the [PTT] on the slave transceiver during cloning. This will cause a cloning error.
r When cloning is nished, turn power off, then on again to return to normal operation.
NOTE: Transceiver-to-transceiver cloning can not be done between 40CH version and 100CH version, or CPU Rev.1. and Rev.2.0.
Y While pushing [P3] and [Y], turn the transceivers power on to enter CPU version check mode. CPU revision is displayed (100CH display for 100CH version only).

OPTION

Options
D PC-to-transceiver cloning Please refer to the HELP file that comes with the CS-F3G CLONING SOFTWARE.
CAUTION: Imprudent cloning operation causes a cloning error. In such a case, memory contents may be lost. Cloning must then be repeated.
D BATTERY PACKS BP-208 BATTERY CASE Allows a set of Alkaline batteries to operate the handheld when charging the rechargeable battery or in emergencies, etc. 6 AA (R6) cells are required. BP-209 Ni-Cd BATTERY PACK 7.2 V/1100 mAh Ni-Cd battery pack, allows more than 8 hours operation. BP-210 Ni-HM BATTERY PACK 7.2 V/1650 mAh Ni-MH battery pack, allows approx. 11 hours operation. D CHARGER BC-144 DESKTOP CHARGER + BC-145 AC ADAPTOR For rapid charging of battery packs. An AC adapter is supplied with the charger. Charging time: 1.5 to 2 hrs. BC-137 (#11) BATTERY CHARGER + BC-122 AC ADAPTOR For regular charging of battery packs. An AC adapter is additionally required. Charging time: 15 hrs. BC-146 BATTERY CHARGER + BC-147 AC ADAPTOR For regular charging of battery packs. An AC adapter is additionally required. Charging time: 18.5 hrs. BC-121 MULTI-CHARGER + AD-94 (#11) CHARGER ADAPTOR (6 pcs.) For rapid charging of up to 6 battery packs (six AD-94s are required) simultaneously. An AC adapter may be supplied depending on version. Charging time: 1.5 to 2 hrs. BC-119 DESKTOP CHARGER + AD-94 (#11) CHARGER ADAPTOR For rapid charging of battery packs. An AC adapter is supplied with the charger. Charging time: 1.5 to 2 hrs.

10 OPTIONS

D OTHER OPTIONS UT-96 2/5TONE UNIT Provides 2/5Tone capabilities. UT-105 SmarTrunkIITM Logic Board Provides SmarTrunkIITM capabilities. UT-108 DTMF DECODER UNIT Provides DTMF decode and ANI capabilities. UT-109/UT-110 SCRAMBLER UNIT Non-rolling type(UT-109)/ Rolling type voice scrambler unit provides higher communication security. UT-111 TRUNKING BOARD Provides trunking operation. UT-113 MAN DOWN UNIT Provides a measure of safety when working in a hazardous environment, etc. HM-46L/HM-75A/HM-131L SPEAKER-MICROPHONES Combination speaker-microphone that provides convenient operation while hanging the transceiver from your belt. HS-51 HEAD SET Allows you hands-free operation. Includes VOX, PTT and TOT. SP-13 EARPHONE Provides clear receive audio in noisy environments. MB-74 BELT CLIP Exclusive alligator-type belt clip for IC-F3GT/GS, IC-F4GT/GS. AD-98FSC ANTENNA CONNECTOR ADAPTER Allows you to connect a BNC-type antenna. CS-F3G CLONING SOFTWARE Allows you to clone the memory contents of an IC-F3GT/GS, IC-F4GT/GS by PC editing. OPC-474 CLONING CABLE Cloning cable for transceiver to transceiver OPC-478 CLONING CABLE Cloning cable for PC to transceiver.