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

Models: IC-F51 IC-F50

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

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

Contents

VHF Transceiver Repair Notes IntroductionOrdering Parts Table of Contents ‘ Transmitter Specifications‘ General ‘ Receiver Front Unit Inside ViewsMain Unit Removing the Front Unit Disassembly InstructionsRemoving the Chassis Unit Removing the Main Unit RF Circuit Main Unit Antenna Switching Circuit Main UnitReceiver Circuits 3 1ST Mixer and 1ST if Circuits Main Unit Receive Mute Circuits Main and Front Units Transmitter CircuitsAF Amplifier Circuit Main and Front Units Microphone Amplifier Circuit Front and Main Units Modulation Circuit Main Unit DRIVE/POWER Amplifier CircuitsPLL Circuits APC Circuit Main Unit Main Unit Voltage Line Power Supply CircuitVCO Circuit Main Unit Front Unit Voltage Line Compounder Circuit Main Unit Other CircuitsPort Allocations Expander IC Front Unit IC410 Mdio SEG1SCK Msck 4 D/A Converter IC Main Unit IC6 Expander IC Main Unit IC12 Preparation Screen Display Example Adjustment Frequency ListFrequency Adjustment Item Ctcss Ptte PTT MIC Mice ConnectionJIG Cable SP+ Software Adjustments Transmitting Software Adjustments Receiving Convenient Front Unit Connector BoardVR Board Main Unit IC9 Varicap 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 Q23 Front Unit J402 MC401 VHF B6034B VR Board Connector Board MP701 Section Block Diagram CPU Voltage Diagram 2SC4116BL TC7W66FK 11-3 VR / Connector Boards VR Board Icom America Inc 32, Kamiminami, Hirano-ku, Osaka, 547-0003, Japan