Kenwood KDC-X491 - User Manual

This product uses Lead Free solder.
This product complies with the
RoHS directive for the European market.
CD RECEIVER
SERVICE MANUAL
KDC-MP4036U/MP435U/X491
KDC-W4537UA/W4537UAY
KDC-W4537UG/W4537UGY
KDC-W4737U/W4737UY
* Depends on the model. Refer to the parts list.
Panel assy
KDC-MP4036U (A64-4129-12)
Panel assy
KDC-MP435U (A64-4126-12)
SPARE TDF PANEL
MAIN UNIT NAME TDF PARTS No. TDF NAME
KDC-MP4036U Y33-2720-64 TDF-MP4036U
KDC-MP435U Y33-2720-61 TDF-MP74D
KDC-W4537UA Y33-2720-63 TDF-W4537U
KDC-W4537UAY Y33-2720-63 TDF-W4537U
KDC-W4537UG Y33-2720-63 TDF-W4537U
Panel assy
KDC-MP4737U/MP4737UY (A64-4175-12)
Panel assy
KDC-X491 (A64-4221-12)
KDC-W4537UGY Y33-2720-63 TDF-W4537U
KDC-W4737U Y33-2720-62 TDF-W4737U
Panel assy
KDC-W4537Uxx (A64-4127-12)
Mounting hardware assy
(J21-9716-03)
Lever
(D10-4589-04) x2
* DC cord
(E30-6428-05)
* Screw set
(N99-1757-05)
* DC cord
(E30-6671-05)
* Antenna adaptor
(T90-0523-05)
* Plastic cabinet assy
(A02-2736-03)
* Remote controller assy (RC-xxx)
(A70-xxxx-xx)
Battery
(Not supplied)
* Carrying case
(W01-xxxx-xx)
Escutcheon
(B07-3125-01)
KDC-W4737U
KDC-X491
KDC-W4537U
KDC-MP435U
KDC-MP4036U
KDC-W4737UY Y33-2720-62 TDF-W4737U
KDC-X491 Y33-2720-60 TDF-MP74DX
© 2007-4 PRINTED IN JA PAN
B53-0513-00
(
N
)
552

Summary

System Block Diagrams

Electric Unit Block Diagram

Functional overview of the electric unit's internal circuitry.

CD Player Unit Block Diagram

Functional overview of the CD player mechanism's circuitry.

Component Descriptions

Electric Unit Components Description

Detailed functions and applications of electric unit components.

Switch and CD Player Unit Components

Lists components for switch and CD player units, including their functions.

Microcomputer Terminal Functions

System µ-COM Terminal Functions

Details pin functions and operations for the system microcomputer.

Test Mode Operations

Entering and Clearing Test Mode

Instructions for activating, deactivating, and resetting test mode.

Test Mode Functional Tests

Covers tuner, FST, CD source, and audio adjustments in test mode.

Special Test Mode Displays and Functions

Explains special displays, dual zone, backup measurement, and key functions.

Security Code Management

Security Code Registration and Clearing

Procedures for registering and clearing security codes in test mode.

DC Offset Error Diagnostics

DC Offset Error Detection and Processing

Explains purpose, detection, processing, and cancellation of DC offset errors.

Circuit Board Layouts

Switch Unit PC Board Layouts

Component and foil side views of the switch unit circuit board.

Electric Unit PC Board Layouts

Component and foil side views of the electric unit circuit board.

CD Player Unit PC Board Layouts

Component and foil side views of the CD player unit circuit board.

Circuit Schematic Diagrams

Electric Unit Schematic Diagrams

Detailed circuit schematics for the main electric unit.

Switch Unit Schematic Diagrams

Circuit schematics for the switch unit.

CD Player Unit Schematic Diagrams

Circuit schematics for the CD player unit.

Exploded Assembly Views

CD Mechanism Exploded View

Visual breakdown of the CD mechanism assembly parts.

Unit Exploded View

Visual breakdown of the main unit assembly parts.

Parts List and Component Data

General and Unit-Specific Parts List

Lists part numbers for various unit assemblies and general items.

Electric Unit and Mechanism Parts List

Details parts for the electric unit and mechanism assembly.

Component Characteristic Tables

Provides detailed data for capacitors, resistors, and chip components.

Technical Specifications

Tuner and CD Player Specifications

Technical data for tuner sections and CD player functions.

Audio, USB, and General Specifications

Details on audio output, USB interface, and general operating parameters.

Kenwood KDC-X491 Specifications

General

Brand	Kenwood
Model	KDC-X491
Category	Car Receiver
Language	English