Manuals / Icom / Communications / Two-Way Radio

Icom IC-F21S 1-1-32, Kamiminami, Hirano-ku, Osaka, 547-0003, Japan, S-13717IZ-C1, Icom Inc

Models: IC-F21S

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	S-13717IZ-C1
1-1-32, Kamiminami, Hirano-ku, Osaka, 547-0003, Japan	© 2001 Icom Inc.

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Icom IC-F21S service manual 1-1-32, Kamiminami, Hirano-ku, Osaka, 547-0003, Japan, S-13717IZ-C1, Icom Inc

Contents

UHF FM TRANSCEIVERS SERVICE MANUALORDERING PARTS INTRODUCTIONDANGER REPAIR NOTESTABLE OF CONTENTS ‘ TRANSMITTER SECTION 1 SPECIFICATIONS‘ GENERAL ‘ RECEIVERBOTTOM VIEW SECTION 2 INSIDE VIEWSMAIN UNIT TOP VIEW REMOVING THE MAIN UNIT SECTION 3 DISASSEMBLY INSTRUCTIONSREMOVING THE CHASSIS 4-1-1 ANTENNA SWITCHING CIRCUIT SECTION 4 CIRCUIT DESCRIPTION4-1 RECEIVER CIRCUITS 4-1-4 2ND IF AND DEMODULATOR CIRCUITS4-1-6 SQUELCH CIRCUIT 4-2 TRANSMITTER CIRCUITS4-2-3 DRIVE/POWER AMPLIFIER CIRCUITS 4-2-1 MICROPHONE AMPLIFIER CIRCUIT4-3-2 TX LOOP 4-3 PLL CIRCUIT4-3-1 GENERAL 4-3-3 RX LOOP4-5-1 CPU IC7 4-5 PORT ALLOCATIONS4-4 POWER SUPPLY CIRCUITS VOLTAGE LINE LINE4-5-3 D/A CONVERTOR IC IC9 CPU IC7-continued4-5-2 OUTPUT EXPANDER IC IC15 PortSTARTING SOFTWARE ADJUSTMENT SECTION 5 ADJUSTMENT PROCEDURES5-1 PREPARATION ADJUSTMENT SOFTWARE INSTALLATIONJIG cable RF Power HighScreen display exampe CH NoOPC-478 DC power cable connectionsConnection ADJUSTMENT CONDITIONS 5-2 PLL ADJUSTMENTADJUSTMENT ADJUSTMENTADJUSTMENT CONDITION 5-3 SOFTWARE ADJUSTMENTADJUSTMENT MEASUREMENTADJUSTMENT CONDITION SOFTWARE ADJUSTMENT - continuedADJUSTMENT MEASUREMENTSW-A UNIT F21 only PARTS LISTSECTION UNIT F21S onlyORDER MAIN UNITMAIN UNIT DESCRIPTIONORDER MAIN UNITMAIN UNIT DESCRIPTIONORDER MAIN UNITMAIN UNIT DESCRIPTIONDESCRIPTION MAIN UNITORDER CHASSIS PARTS SECTION 7 MECHANICAL PARTS AND DISASSEMBLYACCESSORIES MAIN UNITIC-F21S UNIT abbreviation C CHASSIS PARTS, M MAIN UNITDIODES SECTION 8 SEMI-CONDUCTOR INFORMATIONTRANSISTOR AND FET’S B5601C SECTION 9 BOARD LAYOUTS9-1 MAIN UNIT TOP VIEWBOTTOM VIEW IC11TOP VIEW SW-A UNIT 9-2 SW-A AND SW-B UNITSB5603C SW-B UNITto the MAIN unit J1 B5604CBOTTOM VIEW SW-A UNIT SW-B UNITSECTION 10 BC-146 OPTIONAL DESKTOP CHARGER INFORMATION 10-1 PARTS LIST10-2 DISASSEMBLY INFORMATION CHARGE UNITB5650 10-3 VOLTAGE DIAGRAMMP1 MP2 10-4 BOARD LAYOUTSW-A/SW-B UNIT S1 SECTION 11 BLOCK DIAGRAMMAIN UNIT EXT.MICSECTION 12 VOLTAGE DIAGRAM 12-1 MAIN UNITSDEC 12-1 MAIN UNIT VOLTAGE DIAGRAMSECTION SW-A UNIT CHASSIS UNIT12-2 SW-A AND SW-B UNITS SW-B UNITPage 2001 Icom Inc 1-1-32, Kamiminami, Hirano-ku, Osaka, 547-0003, JapanS-13717IZ-C1

S-13717IZ-C1

1-1-32, Kamiminami, Hirano-ku, Osaka, 547-0003, Japan

© 2001 Icom Inc.