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Components description, Display unit (x54-3480-10), Tx-rx unit (x57-6990-10) – Kenwood TK-8180 User Manual

Page 22: Tk-8180

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TK-8180

22

Display unit (X54-3480-10)

Ref. No.

Part Name

Description

IC901

IC

Voltage regulator/ 5V

IC902

IC

Microprocessor

IC903

IC

LCD driver

Q901,902

Transistor

HOOK switch

Q904

Transistor

TX indication LED switch

Q905

Transistor

BUSY indication LED switch

Q906

Transistor

Dimmer switch control

Q907

Transistor

Dimmer switch

Q909

Transistor

Backlight control switch

Q910

Transistor

8C switch

Q911

Transistor

8C switch control

Q913

Transistor

Backlight control

D901,902

Zener diode

Voltage protection

D903

Varistor

Current limitter

D904~906

Diode

Surge protection

D907

LED

TX/Busy indication

D909~920

LED

LCD backlight

D921~930

LED

KEY backlight

TX-RX unit (X57-6990-10)

Ref. No.

Part Name

Description

IC1

IC

Power module

IC71,72

IC

DC amp for TX APC

IC171

IC

RX 1st mixer

IC172

IC

FM IF system IC

IC251

IC

DC-DC converter

IC301

IC

PLL system IC

IC302

IC

PLL CP switch

IC401

IC

EEPROM

IC402

IC

RTC processor

IC403

IC

Shift register

IC404

IC

Microprocessor

IC405

IC

Flash memory

IC406

IC

HSD BPF/HSD compalator

IC407

IC

DET amp/Data LPF (DB-25)

IC408

IC

LSD buffer amp/VCXO bias amp

IC409

IC

LSD LPF/Voltage DC-reference

IC410

IC

D/A converter

Ref. No.

Part Name

Description

IC411

IC

RF BPF tuning voltage DC amp

IC412

IC

Modulation LPF/DET amp

IC413

IC

AF switch IC

IC414

IC

MIC amp

IC415

IC

AQUA-L

IC416

IC

Level converter IC (RS-232C)

IC417

IC

Audio IC

IC801

IC

Voltage detector (CPU Reset)

IC802

IC

Voltage detector (INT)

IC803

IC

Voltage regulator/ 8V

IC804,805

IC

Voltage regulator/ 5V

IC807

IC

Voltage regulator/ 5V

Q1

Transistor

TX pre-driver

Q2

Transistor

TX driver

Q3

Transistor

TX gate switch

Q70

Transistor

High/Low power switch

Q72

FET

High/Low power switch

Q103

Transistor

Front-end LNA

Q171,172

Transistor

IF amp

Q173,174

Transistor

W/N CF switch control

Q175

Transistor

Noise Amp

Q176

FET

DET mute switch

Q177

Transistor

W/N CF switch control

Q178

Transistor

W/N discrete switch

Q179

Transistor

W/N CF switch control

Q251

Transistor

Ripple filter

Q301

Transistor

PLL f-in doubler amp

Q302,303

Transistor

PLL LPF

Q306,307

FET

TX/RX VCO

Q308~310

Transistor

TX/RX VCO switch

Q311

Transistor

VCO buffer amp

Q312

Transistor

Ripple filter

Q313

Transistor

VCO buffer amp

Q402

Transistor

Beat shift switch

Q403

FET

AF switch (Voice)

Q405

Transistor

AQUA control switch

Q406

FET

AF switch (LSD)

Q409

Transistor

AF mute switch

Q410,411

Transistor

MIC AGC

Q412

FET

AF mute switch

COMPONENTS DESCRIPTION