VHF Transceiver | Icom IC-F50, IC-F51 instruction

SERVICE MANUAL

VHF TRANSCEIVER

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Icom IC-F50, IC-F51 service manual VHF Transceiver

Contents

VHF Transceiver Ordering Parts IntroductionRepair Notes Table of Contents ‘ General Specifications‘ Transmitter ‘ Receiver Main Unit Inside ViewsFront Unit Removing the Chassis Unit Disassembly InstructionsRemoving the Front Unit Removing the Main Unit Receiver Circuits Antenna Switching Circuit Main UnitRF Circuit Main Unit 3 1ST Mixer and 1ST if Circuits Main Unit AF Amplifier Circuit Main and Front Units Transmitter CircuitsReceive Mute Circuits Main and Front Units Microphone Amplifier Circuit Front and Main Units PLL Circuits DRIVE/POWER Amplifier CircuitsModulation Circuit Main Unit APC Circuit Main Unit VCO Circuit Main Unit Power Supply CircuitMain Unit Voltage Line Front Unit Voltage Line Port Allocations Other CircuitsCompounder Circuit Main Unit Expander IC Front Unit IC410 SCK SEG1Mdio Msck Expander IC Main Unit IC12 4 D/A Converter IC Main Unit IC6 Preparation Frequency Adjustment Item Adjustment Frequency ListScreen Display Example Ctcss JIG Cable ConnectionPtte PTT MIC Mice SP+ Software Adjustments Transmitting Convenient Software Adjustments Receiving VR Board Connector BoardFront Unit IC9 Main Unit Varicap HVC375BTRF Themistor Ertjoep 473J Ceramic ECJ0EC1H0R5B Mechanical Parts and Disassembly Unitmm inch Transistor and FET’S SEMI-CONDUCTOR InformationDiodes Main Unit Board LayoutsTOP View Q23 Bottom View J402 Front Unit MC401 VR Board VHF B6034B MP701 Connector Board CPU Section Block Diagram 2SC4116BL Voltage Diagram TC7W66FK 11-3 VR / Connector Boards VR Board Icom America Inc 32, Kamiminami, Hirano-ku, Osaka, 547-0003, Japan