Voltage Diagram, Board Layout | Icom IC-F21S instruction

10-3 VOLTAGE DIAGRAM

J1

HEC0470-01-230

C : 13.8V		C : 7.2V
N : 13.8V		N : 13.8V
	R1 68	MP1
R2	DS1
1k	TLG124A

C : 9.2V

N : 13.8V

MP2

10-4 BOARD LAYOUT

J1

MP1

MP2

HD1

R2

DS1

R1

B5650

10 - 2

Image 31

Icom IC-F21S service manual Voltage Diagram, Board Layout

Contents

UHF FM Transceivers Ordering Parts IntroductionRepair Notes Table of Contents ‘ Receiver Specifications‘ General ‘ Transmitter Main Unit TOP View Inside ViewsBottom View Removing the Chassis Disassembly InstructionsRemoving the Main Unit Receiver Circuits Circuit Description Transmitter Circuits PLL Circuit PLL CircuitGeneral VCO Circuit Port Allocations Power Supply Circuits Voltage LinePin Port Description Number 3 D/A Convertor IC IC9 Output Expander IC IC15 Preparation Adjustment Procedures GND Screen display exampeJIG cable SPE DC Power Supply GND DC power cable connectionsConnection Voltage PLL AdjustmentPLL Lock Main Software Adjustment SQL SensitivitySquelch Level Unit Section Parts ListMain Unit Coil Eljfc R68M-F Array Electrolytic ECEV1CA470SP Connector Screw abbreviations B0, BT Self-tapping Mechanical Parts and DisassemblyAccessories Chassis Parts IC-F21S Transistor and FET’S SEMI-CONDUCTOR InformationDiodes Main Unit Board Layouts IC6 FT1 TOP View SW-A Unit SW-A and SW-B UnitsSW-B Unit CBI0 CBI1 CBI2 CBI3 Bottom View SW-A UnitGND Tled Rled VCC Volin Volout Charge Unit Parts ListDisassembly Information BC-146 Optional Desktop Charger Information Board Layout Voltage Diagram SW-A/SW-B Unit S1 Block Diagram 2SC4215 O Voltage Diagram DTC144EU Section Voltage Diagram Q1 XP4216 SW-A UnitPage 32, Kamiminami, Hirano-ku, Osaka, 547-0003, Japan