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Icom IC-F21S service manual MP1 MP2, B5650, Voltage Diagram, Board Layout

Models: IC-F21S

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10-3 VOLTAGE DIAGRAM

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

HD1

MP1

MP2

DS1

B5650

10 - 2

Page 31

Image 31

Icom IC-F21S service manual MP1 MP2, B5650, Voltage Diagram, Board Layout

Contents

SERVICE MANUAL UHF FM TRANSCEIVERSREPAIR NOTES INTRODUCTIONDANGER ORDERING PARTSTABLE OF CONTENTS ‘ RECEIVER SECTION 1 SPECIFICATIONS‘ GENERAL ‘ TRANSMITTERMAIN UNIT TOP VIEW SECTION 2 INSIDE VIEWSBOTTOM VIEW REMOVING THE CHASSIS SECTION 3 DISASSEMBLY INSTRUCTIONSREMOVING THE MAIN UNIT 4-1-4 2ND IF AND DEMODULATOR CIRCUITS SECTION 4 CIRCUIT DESCRIPTION4-1 RECEIVER CIRCUITS 4-1-1 ANTENNA SWITCHING CIRCUIT4-2-1 MICROPHONE AMPLIFIER CIRCUIT 4-2 TRANSMITTER CIRCUITS4-2-3 DRIVE/POWER AMPLIFIER CIRCUITS 4-1-6 SQUELCH CIRCUIT4-3-3 RX LOOP 4-3 PLL CIRCUIT4-3-1 GENERAL 4-3-2 TX LOOPLINE 4-5 PORT ALLOCATIONS4-4 POWER SUPPLY CIRCUITS VOLTAGE LINE 4-5-1 CPU IC7Port CPU IC7-continued4-5-2 OUTPUT EXPANDER IC IC15 4-5-3 D/A CONVERTOR IC IC9ADJUSTMENT SOFTWARE INSTALLATION SECTION 5 ADJUSTMENT PROCEDURES5-1 PREPARATION STARTING SOFTWARE ADJUSTMENTCH No RF Power HighScreen display exampe JIG cableConnection DC power cable connectionsOPC-478 ADJUSTMENT 5-2 PLL ADJUSTMENTADJUSTMENT ADJUSTMENT CONDITIONSMEASUREMENT 5-3 SOFTWARE ADJUSTMENTADJUSTMENT ADJUSTMENT CONDITIONMEASUREMENT SOFTWARE ADJUSTMENT - continuedADJUSTMENT ADJUSTMENT CONDITIONUNIT F21S only PARTS LISTSECTION SW-A UNIT F21 onlyDESCRIPTION MAIN UNITMAIN UNIT ORDERDESCRIPTION MAIN UNITMAIN UNIT ORDERDESCRIPTION MAIN UNITMAIN UNIT ORDERORDER MAIN UNITDESCRIPTION MAIN UNIT SECTION 7 MECHANICAL PARTS AND DISASSEMBLYACCESSORIES CHASSIS PARTSUNIT abbreviation C CHASSIS PARTS, M MAIN UNIT IC-F21STRANSISTOR AND FET’S SECTION 8 SEMI-CONDUCTOR INFORMATIONDIODES TOP VIEW SECTION 9 BOARD LAYOUTS9-1 MAIN UNIT B5601CIC11 BOTTOM VIEWSW-B UNIT 9-2 SW-A AND SW-B UNITSB5603C TOP VIEW SW-A UNITSW-B UNIT B5604CBOTTOM VIEW SW-A UNIT to the MAIN unit J1CHARGE UNIT 10-1 PARTS LIST10-2 DISASSEMBLY INFORMATION SECTION 10 BC-146 OPTIONAL DESKTOP CHARGER INFORMATION10-4 BOARD LAYOUT 10-3 VOLTAGE DIAGRAMMP1 MP2 B5650EXT.MIC SECTION 11 BLOCK DIAGRAMMAIN UNIT SW-A/SW-B UNIT S112-1 MAIN UNIT SECTION 12 VOLTAGE DIAGRAMSDEC SECTION VOLTAGE DIAGRAM12-1 MAIN UNIT SW-B UNIT CHASSIS UNIT12-2 SW-A AND SW-B UNITS SW-A UNITPage S-13717IZ-C1 1-1-32, Kamiminami, Hirano-ku, Osaka, 547-0003, Japan2001 Icom Inc