Logic Unit, Bottom view | Icom IC-FR3000 instruction

• LOGIC UNIT

Top view

CTCSS decoder (IC29: FX805LG)

Splatter filter (IC4: NJM2902V)

D/A converter (IC25: M62364)

Mic mix amplifier (IC2: NJM2902V)

AF amplifier (IC17: LA4425A)

Mic amplifier (IC1: NJM2902V)

Mic mute (IC13: BU4066)

Bottom view

RESET

(IC34: S-80842C)

High-pass filter, De-emphasis circuts (IC9: NJM2902V)

Ringer detect circuit (IC48: TLP121)

DTMF decoder (IC30: TC4W53FU, IC31: LC7387M)

EEPROM

(IC37: HN58X2464TI)

CPU

(IC33: HD64F2238BF)

Temperature switching circuit (IC32: TC4W53)

LED current CTRL

(Q18, Q19, Q20: XP1114)

ON-HOOK signal output (IC45: LM567M)

MIC amplifier, Limitter (IC3: NJM2902V)

2 - 2

Image 6

Icom IC-FR3000 manual Logic Unit, Bottom view

Contents

IC-fr3000 iC-fr3 1 0 Introduction Ordering PartsRepair Notes Table of Contents Specifications General Board Layout PA Unit Logic Unit Bottom view TX Unit RX Unit 2 1ST Mixer and 1ST if Circuits RX Unit Receiver CircuitsRF Circuit RX Unit 3 2ND if and Demodulator Circuits RX Unit Transmitter Circuits Receiver Mute Circuits Logic UnitMIC Mute Case of the Ctcss and Dtcs Signals From the CPU Case of the 2/5TONE SignalsCase of the Dtmf Signals from Dialer IC Power Amplifier Circuit PA Unit PLL Circuits Power Supply Circuits Other Circuits Expander IC Logic Unit IC40 Port AllocationsExpander IC Logic Unit IC39 Expander IC Logic Unit IC41 5 D/A Converter IC TX Unit IC5 Busy DtcsiTEL MCK Required Test Equipment Battery RXPreparation MIC Before Entering the Adjustment Mode Process to the Permit Adjustment Mode Access Exiting the Adjustment Mode Entering the Adjustment ModeOperating in the Adjustment Mode After Finishing Adjustment Wide Adjustment Mode CH ListExplanation of LCD Display in the Adjustment Mode Narrow TX Unit TOP View RX Unit TOP View CP2 PLL AdjustmentIC-FR3000 TOP View CP4 Software Adjustment LOW PowerOutput Deviation Ctcss Dtcs Section Parts List REG Unit Front Unit Logic Unit Bridge Resistor ERJ12YJ390U ECEV1CA100SR ECEV1CA220SR Tantalum Teesva 1V 104M8L RX Unit Tantalum Teesva 1V 224M8L Rvco Unit TX Unit Tvco Unit PA Unit VR Unit JACK1 Unit JACK2 Unit Chassis Unit Option Unit Installation Duplexer and isolater installation Example 3 Duplexer and Isolater Connection Connection Example 1 Isolater ConnectionExample 2 Duplexer Connection ISO Isolater DUP Duplexer Mechanical Parts and Disassembly Front Unit REG Unit Rvco Unit SEMI-CONDUCTOR Information Transistors and Fets Diodes Front Unit Tvco Unit Rvco Unit Rvco Unit Tvco Unit VR Unit ¡BOTTOM View Logic Unit Board GND TMUTE1 Txaf Tone TMUTE2 Patemp Rvswr Fwswr RX Unit RX Unit TX Unit TX Unit PA Unit PA Unit REG Unit REG Unit JACK2 UnitJACK1 Unit Block Diagram PA Unit Wiring Diagram Section Voltage Diagram Rvco Unit TX Unit PA Unit Unit Logic Unit Chassis Unit Icom New Zealand 32, Kamiminami, Hirano-ku, Osaka, 547-0003, Japan