Icom IC-F50, IC-F51 service manual Inside Views, Main Unit, Front Unit

Page 5

SECTION 2 INSIDE VIEWS

MAIN UNIT

TOP VIEW

BOTTOM VIEW

+5 Regurator (IC9: NJM2870)

Power amplifier (Q7: RD07MVS1)

APC amplifier (IC2: TA75S01F)

Analog switch (IC13: BU4066BCFV) Baseband IC

(IC10: AK2346) Expander IC

(IC12: BU4094BCFV)

 

Antenna

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

switching circuit

 

 

 

 

 

 

 

 

 

 

 

 

S5 Regulator

 

(D2,D5: 1SV307)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Q23: 2SB1132

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Q24: XP6501

 

TX/RX

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Q25: DTA144EU

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

T5 Regulator

 

 

 

 

 

 

 

 

 

 

 

 

 

 

switch

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(Q21: 2SA1577)

 

(D14,D15: MA2S077)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VCO circuit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D/A converter

 

 

 

 

 

 

 

 

 

 

 

R5 Regulator

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(Q22: 2SA1577)

 

(IC6: M62363FP)

 

 

 

 

 

 

 

 

 

 

 

 

IF amplifier

 

 

 

 

 

 

 

 

 

 

(Q4: 2SC4215)

 

 

 

 

IF IC

 

 

 

 

*Scrambler IC

 

 

 

 

(IC1: TA31136FN)

 

 

 

 

 

 

(IC14: FX214LG)

 

 

 

 

 

 

 

 

 

 

 

 

*Depended on versions

FRONT UNIT

TOP VIEW

BOTTOM VIEW

AF amplifier

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(IC405: TA7368F)

 

 

 

 

 

 

 

Microphone

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

mute switch

 

 

 

 

 

Expander IC

(IC406: TC7W66FK)

 

 

 

 

 

 

 

 

 

 

(IC410: BU4094BCFV)

 

 

 

 

 

 

 

 

 

 

CPU

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(IC401:

 

 

 

 

 

 

 

HD6432264F01TF)

 

 

 

 

 

 

 

EEPROM

 

 

 

 

 

 

 

 

 

Reset IC

 

 

 

 

 

 

 

 

 

 

 

 

(IC409: 24LC64T)

 

 

 

 

 

 

(IC408: BD5242G)

2 - 1

Image 5 Contents
VHF Transceiver Repair Notes IntroductionOrdering Parts Table of Contents ‘ General Specifications‘ Transmitter ‘ ReceiverFront Unit Inside ViewsMain Unit Removing the Chassis Unit Disassembly InstructionsRemoving the Front Unit Removing the Main UnitReceiver Circuits Antenna Switching Circuit Main UnitRF Circuit Main Unit 3 1ST Mixer and 1ST if Circuits Main UnitAF Amplifier Circuit Main and Front Units Transmitter CircuitsReceive Mute Circuits Main and Front Units Microphone Amplifier Circuit Front and Main UnitsPLL Circuits DRIVE/POWER Amplifier CircuitsModulation Circuit Main Unit APC Circuit Main UnitVCO Circuit Main Unit Power Supply CircuitMain Unit Voltage Line Front Unit Voltage LinePort Allocations Other CircuitsCompounder Circuit Main Unit Expander IC Front Unit IC410SCK SEG1Mdio MsckExpander IC Main Unit IC12 4 D/A Converter IC Main Unit IC6Preparation Frequency Adjustment Item Adjustment Frequency ListScreen Display Example CtcssJIG Cable ConnectionPtte PTT MIC Mice SP+Software Adjustments Transmitting Convenient Software Adjustments ReceivingFront Unit Connector BoardVR Board IC9 Main UnitVaricap HVC375BTRF Themistor Ertjoep 473J Ceramic ECJ0EC1H0R5B Mechanical Parts and Disassembly Unitmm inch Diodes SEMI-CONDUCTOR InformationTransistor and FET’S TOP View Board LayoutsMain Unit Q23 Bottom ViewJ402 Front UnitMC401 VR Board VHF B6034BMP701 Connector BoardCPU Section Block Diagram2SC4116BL Voltage DiagramTC7W66FK 11-3 VR / Connector Boards VR Board Icom America Inc 32, Kamiminami, Hirano-ku, Osaka, 547-0003, Japan
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