Icom IC-F7000 service manual Bottom View Driver Board, VARISTOR-2 Board

Page 67

• BOTTOM VIEW (DRIVER BOARD)

DRVO

GND

GND

to PA unit J6301

DRVI

DRVI

GND

GND

DRVO

to PA unit J6302

9-3-7 VARISTOR-2 BOARD

VARO

GND

GND

to PA unit J6412

9 - 14

Image 67

Contents Service Manual OTH IntroductionOrdering Parts Repair Notes AUSTable of Contents Specifications SP-25 External Speaker ‘ General RC-26 Remote Controller ‘ GeneralUnit mm inch 37 1 15 RC-26 Section Inside ViewsIC-F7000 Bottom View IC-F7000 TOP View‘ in Case of Using External Reference Signal About External Reference Signal Input‘ Connection ‘ in Case of Using Internal Reference SignalReceiver Circuits Circuit DescriptionDSP Unit AF Amplifier Circuit DSP and Main Units DSP Receiver Circuit Main and DSP UnitsAGC Circuit DSP and Main Units DSP CircuitTransmitter Circuits VER Board RF Circuit MAIN, PA, PLL Units and DRIRF Filter Circuit PLL Circuits Microphone Circuit Display Board Reset Circuit Display Board3 2ND LO and Reference Oscillator Circuits PLL Unit LCD Circuit Display and Connect BoardsPLL Unit Voltage Line Power Supply CircuitsPA Unit Voltage Line Display Board RC-26 Voltage LineOutput Expander IC for the PLL Strobe Main Unit IC3601 Port AllocationsOutput Expander IC for the PLL Unit Main Unit IC3602 Output Expander IC Main Unit IC3603 Output Expander IC for Bandpass FIL- Ters Main Unit IC36046 D/A Converter IC Main Unit IC3606 Front CPU Port Allocations RC-26, Display Board IC8201 Connection Adjustment ProceduresPreparation Required Test EquipmentOperating on the Adjustment Mode Entering the Adjustment ModeVoltage PLL Unit AdjustmentLPL Lock PLLPLL Unit TOP View PA and Filter Units Adjustment PLL Unit Bottom View PA Unit TOP ViewReceiver Adjustments Main Unit TOP View L209 PresettingRC-26 Front Panel Transmitter Adjustments VOL Dial IC-APCMain Unit Section Parts ListMain Board Resistor ERJ3GE JPW Resistor ERJ12YJ0R00U R3332 7030003640 ECEV1CA471P Tantalum ECST1AY335R ADM202EARN PLL UnitResistor ERA3YEB Mylar PA Unit DSP Unit DSP Board VARISTOR-1 Board Driver BoardVARISTOR-2 Board Display Board Front UnitRear Board Connect BoardHM-146 Main Unit MIC Unit Mechanical Parts and DisassemblyFront Parts Chassis PartsAccessries Front Parts AccessoriesConnect Board DR Driver Board Chassis PartsMIC Unit DS DSP BoardTransistor and FET’S SEMI-CONDUCTOR InformationDiodes Rear Board TOP View Board LayoutsTOP View Connect Board TOP ViewBottom View Rear Board Bottom View MIC Unit Bottom View Connect BoardDisplay Board TOP View Bottom View Display Board DSP Board TOP View J9901 J9902 Bottom View DSP BoardJ2051 Bottom View Main Unit PA Unit Bottom View PA Unit PLL Unit Bottom View PLL Unit Driver Board TOP View VARISTOR-1 Board Bottom View Driver Board Voltage Line TX Line RX Line Common Line Section Block DiagramIC-F7000 Wiring Diagram12-1 RC-26 and HM-146 Voltage DiagramsMain Unit Explanatory notes Main PA Unit PLL Unit JPW-ERJ3GE DSP Board