Icom IC F110S, IC F111S, IC F121S service manual Disassembly Instructions

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SECTION 3 DISASSEMBLY INSTRUCTIONS

• Opening case and remove the front panel

➅ Lift up the front portion of the main unit and remove it.

➀Unscrew 4 screws A, and remove the bottom cover.

➁ Disconnect the flat cable B from J2.

➂ Disconnect the cable C from J7.

➃ Unscrew 2 screws D , and remove the front unit in the direction of the arrow.

A

B

• Installation location

UT-108 DTMF decoder unit UT-109

UT-110

Voice scrambler unit

J2

J7

C

D

•Removing the main unit

➀ Unscrew 8 screws E.

➁ Remove the filter case F.

➂ Unscrew the screw G.

➃ Unsolder 3 points H from the antenna connector.

➄ Unsolder 4 points I from IC3.

OPC-617 ACC cable (for external terminal connection)

OPC-617

UT-108

UT-109

UT-110

J6

J1

E

F

H I

G

3 - 1

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Contents IF110S IF111S IF121S Introduction Ordering PartsRepair Notes Explicit Definitions EUR ReceiverSection Inside View Disassembly Instructions 3 1ST Mixer and 1ST if Circuits Main Unit Antenna Switching Circuit Main UnitReceiver Circuits RF Circuit Main UnitTransmitter Circuits APC Circuit Main Unit Power Amplifier Circuit Main UnitPLL Circuits PLL Circuit Main UnitPower Supply Circuits Port AllocationsCPU Preparation Adjustment Software InstallationStarting Software Adjustment System RequirementsRequired Test Equipment Equipment Grade and RangeScreen display exampe PLL Adjustment VoltageSoftware Adjustment PowerSoftware Adjustment ConvenientTrimmer Adjustment Section Parts List Front UnitUnit Main UnitPosistor PRF18BD471QB1RB Ceramic Tantalum ECST1CY105R =Surface mount Mechanical Parts Main Unit SEMI-CONDUCTOR Information Board Layouts Bottom View Front Unit ANT Bottom View Main Unit Section Block Diagram Voltage Diagrams Main Unit Beepo Pwon Page Page Service Manual IC-F210S Low Band 400-430 MHz High Band 440-490 MHz Type of emission 12.5 kHz Narrow/25 kHz Wide 8K50F3E/16K0F3E IC3 Disassembly Instructions 2nd if filter 450 kHz Transmitter Circuits IC4 MB15A02PFV1 Output Expander Main unit IC6 Switching circuit Main unit Q23 Adjustment Procedures FM deviation meter RF power meter CH No RX Freq = 440.200000, TX Freq = RF Power High C133 430.000 MHz Panel Counter to the antenna connec MHz L Operating freq 400.000 MHz L Trimmer Adjustment Ceramic ECJ0EB1C153K Coil LQW2BHN15NJ01L Coil Eljre R10G-F Ceramic GRM31M4C2H2R0CY21L Tantalum CH 1H 8010019060 Chassis 25W 8010019130 Long chassis 45W MP8 M DAN222TL DSA3A1 HVC350B Board Layouts Bottom View Front Unit Chassis IC3 EP3 EP2 Bottom View Main Unit Tmut R29 18k C19 NTCG20 VCC1 VCC2