Icom IC-F50, IC-F51 service manual VHF B6034B, VR Board

Page 31

9-3 VR BOARD

•TOP VIEW

R601

•BOTTOM VIEW

VHF B6034B

9 - 5

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Contents VHF Transceiver Ordering Parts IntroductionRepair Notes Table of Contents ‘ Receiver Specifications‘ General ‘ TransmitterMain Unit Inside ViewsFront Unit Removing the Main Unit Disassembly InstructionsRemoving the Chassis Unit Removing the Front Unit3 1ST Mixer and 1ST if Circuits Main Unit Antenna Switching Circuit Main UnitReceiver Circuits RF Circuit Main UnitMicrophone Amplifier Circuit Front and Main Units Transmitter CircuitsAF Amplifier Circuit Main and Front Units Receive Mute Circuits Main and Front UnitsAPC Circuit Main Unit DRIVE/POWER Amplifier CircuitsPLL Circuits Modulation Circuit Main UnitFront Unit Voltage Line Power Supply CircuitVCO Circuit Main Unit Main Unit Voltage LineExpander IC Front Unit IC410 Other CircuitsPort Allocations Compounder Circuit Main UnitMsck SEG1SCK MdioExpander IC Main Unit IC12 4 D/A Converter IC Main Unit IC6Preparation Ctcss Adjustment Frequency ListFrequency Adjustment Item Screen Display ExampleSP+ ConnectionJIG Cable Ptte PTT MIC MiceSoftware Adjustments Transmitting Convenient Software Adjustments ReceivingVR Board Connector BoardFront Unit IC9 Main UnitVaricap 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 ViewJ402 Front UnitMC401 VR Board VHF B6034BMP701 Connector BoardCPU Section Block Diagram2SC4116BL Voltage DiagramTC7W66FK 11-3 VR / Connector Boards VR Board Icom America Inc 32, Kamiminami, Hirano-ku, Osaka, 547-0003, Japan
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