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Kenwood KT-8300 Service Manual

Kenwood KT-8300
19 pages
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Kenwood KT-8300 Specifications

General IconGeneral
Tuning BandsFM, MW
Output Level750mV
Tuning ScaleAnalogue
FM Tuning Range88 to 108 MHz
Signal to Noise Ratio (AM)50 dB

Summary

EXTERNAL & INTERNAL VIEW

DIAL CORD STRINGING PROCEDURE

BLOCK DIAGRAM OVERVIEW

CIRCUIT DESCRIPTIONS: FM-RF

DD TYPE DUAL GATE MOS-FET ADOPTION

Details the adoption of DD type dual gate MOS-FETs for RF amplification.

HIGH-ACCURACY 6-GANG VARIABLE CAPACITOR

Describes the high-accuracy 6-gang variable capacitor used for tuning.

MOS-FET MIXER STAGE

Explains the use of a dual gate MOS-FET in the mixer stage.

LOCAL OSCILLATOR CIRCUIT

Describes the buffer circuit for stable local oscillation output.

CIRCUIT DESCRIPTIONS: TUNER

FM-IF CIRCUIT

Explains the FM IF circuit with NARROW/WIDE band switching.

FM-DETECTOR CIRCUIT

Describes the wide-band detector circuit of the FM detector.

FM-MPX CIRCUIT

Details the FM multiplex stereo demodulator circuit and its adjustments.

CIRCUIT DESCRIPTIONS: AUDIO AMP

CIRCUIT DESCRIPTIONS: ACCESSORY CIRCUITS

S METER FUNCTION

Describes the signal path for the S meter.

MULTIPATH METER FUNCTION

Explains the multipath meter's function and signal detection.

DEVIATION METER FUNCTION

Details the deviation meter's indication and operation.

T METER FUNCTION

Explains how the T meter uses balanced output differences.

MUTING SYSTEM

Describes the muting control signal and its operation.

ADJUSTMENTS: FM SECTION

DISCRIMINATOR ADJUSTMENT

Adjustment for discriminator tuning and T meter indication.

TRACKING ADJUSTMENT

Tracking adjustments for 90MHz and 105MHz.

IF TRIGGER ADJUSTMENT

Adjusts maximum DC voltage for IF trigger.

IF TRIGGER LEVEL ADJUSTMENT

Adjusts DC voltage to 1.8V for IF trigger level.

IF GAIN ADJUSTMENT

Adjusts DC voltage for IF gain.

S METER ADJUSTMENT

Adjusts S meter pointer indication to "5" digit.

MUTING LEVEL ADJUSTMENT

Adjusts muting operation to be on.

VCO ADJUSTMENT

Adjusts VCO frequency to 19 kHz.

OUTPUT LEVEL ADJUSTMENT

Adjusts output level to 300 mV.

SEPARATION ADJUSTMENT

Adjusts for minimum deflection in stereo separation.

DISTORTION ADJUSTMENT

Adjusts for minimum distortion.

DEVIATION METER ADJUSTMENT

Adjusts for 100% deflection on the deviation meter.

ADJUSTMENTS: AM SECTION

AM IF ADJUSTMENT

Adjusts for maximum deflection on AM IF.

AM TRACKING ADJUSTMENT

Adjusts tracking for AM band frequencies.

DESTINATIONS' PARTS LIST

PARTS LIST: Page 9

CAPACITORS, SEMICONDUCTORS, SWITCHES

Lists various capacitors, semiconductors, and switches.

POWER SUPPLY COMPONENTS

Lists components for the power supply unit.

MISCELLANEOUS COMPONENTS

Lists other parts like connectors, knobs, and fixtures.

PARTS LIST: Page 10

RESISTORS

Lists various resistor values and types.

SEMICONDUCTORS

Lists semiconductor components for FM tuner.

COIL/INDUCTOR/FILTER

Lists coils, inductors, and filters for FM tuner.

PARTS LIST: Page 11

RESISTORS

Lists numerous resistor values and types.

PARTS LIST: Page 12

SEMICONDUCTORS, POTENTIOMETERS, SWITCH/RELAY

Lists semiconductors, potentiometers, switches, and relays.

COIL/INDUCTOR/FILTER, MISCELLANEOUS

Lists coils, inductors, filters, and miscellaneous parts.

PC BOARD LAYOUTS

POWER SUPPLY UNIT

Shows the PC board layout for the power supply unit.

FM FRONT-END UNIT

Shows the PC board layout for the FM front-end unit.

AM TUNER UNIT

Shows the PC board layout for the AM tuner unit.

PC BOARD LAYOUTS: FM TUNER

SEMICONDUCTOR DIAGRAMS

SPECIFICATIONS AND TROUBLESHOOTING

FM TUNER SECTION SPECIFICATIONS

Lists performance specifications for the FM tuner section.

AM TUNER SECTION SPECIFICATIONS

Lists performance specifications for the AM tuner section.

OUTPUT LEVEL SPECIFICATIONS

Details output level specifications for FM and AM.

GENERAL SPECIFICATIONS

Lists general power, dimensions, and weight specifications.

TROUBLESHOOTING GUIDE

Provides guidance for common troubleshooting issues.

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