VHF B6034B, VR Board | Icom IC-F50, IC-F51 instruction

9-3 VR BOARD

•TOP VIEW

R601

•BOTTOM VIEW

VHF B6034B

9 - 5

Image 31

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

Contents

VHF Transceiver Ordering Parts IntroductionRepair Notes Table of Contents ‘ Receiver Specifications‘ General ‘ Transmitter Main Unit Inside ViewsFront Unit Removing the Main Unit Disassembly InstructionsRemoving the Chassis Unit Removing the Front Unit 3 1ST Mixer and 1ST if Circuits Main Unit Antenna Switching Circuit Main UnitReceiver Circuits RF Circuit Main Unit Microphone Amplifier Circuit Front and Main Units Transmitter CircuitsAF Amplifier Circuit Main and Front Units Receive Mute Circuits Main and Front Units APC Circuit Main Unit DRIVE/POWER Amplifier CircuitsPLL Circuits Modulation Circuit Main Unit Front Unit Voltage Line Power Supply CircuitVCO Circuit Main Unit Main Unit Voltage Line Expander IC Front Unit IC410 Other CircuitsPort Allocations Compounder Circuit Main Unit Msck SEG1SCK Mdio Expander IC Main Unit IC12 4 D/A Converter IC Main Unit IC6 Preparation Ctcss Adjustment Frequency ListFrequency Adjustment Item Screen Display Example SP+ ConnectionJIG Cable Ptte PTT MIC Mice 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