Icom IC-F51, IC-F50 service manual 32, Kamiminami, Hirano-ku, Osaka, 547-0003, Japan

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	S-14007IZ-C1
1-1-32, Kamiminami, Hirano-ku, Osaka, 547-0003, Japan	© 2003 Icom Inc.

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Contents VHF Transceiver Repair Notes IntroductionOrdering Parts Table of Contents ‘ Transmitter Specifications‘ General ‘ ReceiverFront Unit Inside ViewsMain Unit Removing the Front Unit Disassembly InstructionsRemoving the Chassis Unit Removing the Main UnitRF Circuit Main Unit Antenna Switching Circuit Main UnitReceiver Circuits 3 1ST Mixer and 1ST if Circuits Main UnitReceive Mute Circuits Main and Front Units Transmitter CircuitsAF Amplifier Circuit Main and Front Units Microphone Amplifier Circuit Front and Main UnitsModulation Circuit Main Unit DRIVE/POWER Amplifier CircuitsPLL Circuits APC Circuit Main UnitMain Unit Voltage Line Power Supply CircuitVCO Circuit Main Unit Front Unit Voltage LineCompounder Circuit Main Unit Other CircuitsPort Allocations Expander IC Front Unit IC410Mdio SEG1SCK Msck4 D/A Converter IC Main Unit IC6 Expander IC Main Unit IC12Preparation Screen Display Example Adjustment Frequency ListFrequency Adjustment Item CtcssPtte PTT MIC Mice ConnectionJIG Cable SP+Software Adjustments Transmitting Software Adjustments Receiving ConvenientFront Unit Connector BoardVR Board Main Unit IC9Varicap HVC375BTRF Themistor Ertjoep 473J Ceramic ECJ0EC1H0R5B Mechanical Parts and Disassembly Unitmm inch Diodes SEMI-CONDUCTOR InformationTransistor and FET’S TOP View Board LayoutsMain Unit Bottom View Q23Front Unit J402MC401 VHF B6034B VR BoardConnector Board MP701Section Block Diagram CPUVoltage Diagram 2SC4116BLTC7W66FK 11-3 VR / Connector Boards VR Board Icom America Inc 32, Kamiminami, Hirano-ku, Osaka, 547-0003, Japan