Icom IC-F3GS, IC-F3GT service manual Top view

Page 14

• Connection

Standard signal generator to the antenna connector	to [MIC]
0.1 ∝V to 32 mV	Audio generator
(–127 dBm to –17 dBm)

CAUTION:

DO NOT transmit while an SSG is connected to the antenna connector.

to an RS-232C port
	Personal
OPC-478	computer

FM

deviation meter

Attenuator

40 dB or 50 dB

RF power meter 0.1–10 W/50 Ω

Frequency

counter

DB9 female plug

(incl. level converter circuit)

to [SP]

SINAD meter

JIG cable

Speaker (8 Ω )

¥ DC power cable connections

SOFTWARE ADJUSTMENT

	+	DC POWER
	—
		SUPPLY

GND

Battery type detector

DC POWER

SUPPLY

Soldering

DC cable here

PLL ADJUSTMENT

+

—

NOTE: When you adjust the output power (high power), the battery type detector must be con- nected to GND (see illustration at above). Ohterwise the transceiver does not transmit high power, the output power will be low.

Top view

5 - 3

Image 14

Contents VHF FM Transceivers Repair Notes IntroductionOrdering Parts Table of Contents Section Specifications EIA/TIABottom View Inside ViewsMain Unit TOP View Removing the Chassis Panel Disassembly and Option InstructionsDisassembly Instruction Removing the Main UnitOptional Unit Installations Circuit Description Receiver CircuitsTransmitter Circuits Power Supply Circuits Voltage Line PLL CircuitPort Allocations Output Expander IC IC10Adjustment Procedures Preparation¥ JIG cable Top view PLL Adjustment Software Adjustment TXFSoftware Adjustment Parts List Main UnitVariable Thermistor NTCCM20124AG473J-T Tantalum ECST0JY106R Chassis Unit Chassis Parts Mechanical Parts and DisassemblyAccessories IC-F3GS parts Diodes SEMI-CONDUCTOR InformationTransistor and FET’S Board Layouts General and EIA/TIA Versions Except W/N-TYPEMP6 Main Unit Bottom ViewIC1 ETS/CEPT VersionMP5 VHF FI1 BC-137 Optional Desktop Charger Informasion Parts ListDisassembly Information ConvenientVoltage Diagram Board LayoutBlock Diagram Option UnitVoltage Diagram BU4066BCFVBand of ETS/CEPT version N-type DTA144EU Section Voltage Diagram Avref Vtref Toned Tonem AvccPage 32, Kamiminami, Hirano-ku, Osaka, 547-0003, Japan UHF FM Transceivers IC-F4GTIC-F4GS Preparation PLL Adjustment Software Adjustment Power supply requirement APC IC3A NJM3403AV Disassembly and Option Instructions Optional Unit Installations 2ND if and Demodulator Circuits RF signal From PLL Driver PLL Circuit Power Supply Circuits Voltage Line Resistor R132PTT Adjustment Procedures Screen Display Example DC Power Cable Connections L405 L11 Powerlo BPF T1 NJM3403AV-TE1 IC4 Resistor ERJ2GE Thermistor NTCCM1608 4LH 223KC Ceramic ECUE1H470JCQ ECEV1CA470SP Other Ceramic ECJ0EB1E471K Band MHz band MHz and H-band IC-F4GS parts DTA144 EU DTC144 EE DTC144 EU DTC144 TU LOW Band DS1FI1 440-470 MHz Band Except W/N-TYPE Icom 470-500 MHz and High Bands B5542B C308 Q19 B5688B BC-137 Optional Desktop Charger Informasion Voltage Diagram Type Type of GEN Type of GEN and EIA/TIA version NJM3403AV M1-band of GEN and EIA/TIA version G W-type of GEN Type 2SC3585 R44 Q403 2SC5107 O Band of ETS/CEPT version N-type M1 440-470 MHz-band Page 13713IZ-C1U

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