Kenwood KR-4140 Service Manual

KENWOOD
HI/Fl STEREO COMPONENTS
SERVICE MANUAL
KR-4140
SOLID STATE AM-FM STEREO RECEIVER

Kenwood KR-4140 Specifications

General

Brand	Kenwood
Model	KR-4140
Category	Stereo Receiver
Language	English

Summary

PARTS DESCRIPTION LIST

RF (UA1125K) Section Parts

Detailed component list for the RF section.

IF (UA1224K) Section Parts

Component list for the IF section.

MPX (X04-0010-10) Section Parts

Component list for the MPX section.

PRE, TONE & MAIN (UA6001J3) Section Parts

Component list for Pre, Tone & Main sections.

IF (X02-0020-10) Section Parts

Component list for the IF (X02-0020-10) section.

CHASSIS VIEWS

CHASSIS TOP VIEW

Visual guide to the internal layout from the top.

CHASSIS BOTTOM VIEW

Visual guide to the internal layout from the bottom.

OUTPUT TRANSISTOR REPLACEMENT

Symptoms and Replacement Method

Identifies symptoms and the method for replacing output transistors.

Testing and Adjustment Procedures

Outlines testing steps and protection circuit adjustment.

SCHEMATIC DIAGRAMS

RF (UA1125K) Schematic

Detailed circuit diagram for the RF section.

IF (UA1224K) Schematic

Detailed circuit diagram for the IF section.

PRE, TONE & MAIN (UA6001J3) Schematic

Circuit diagram for Pre, Tone & Main sections.

MPX (X04-0010-10) Schematic

Detailed circuit diagram for the MPX section.

IF (X02-0020-10) Schematic

Detailed circuit diagram for the IF (X02-0020-10) section.

ALIGNMENT PROCEDURES

FM Tuner and MPX Alignment

Procedures for aligning FM tuner and MPX circuits.

Beacon Lamp and Squelch Adjustment

Adjusting beacon lamp and squelch (muting) settings.

AM Alignment Procedure

Step-by-step procedure for AM signal alignment.

DIAL CORD STRINGING