Kenwood KR-A5010 Service Manual

KR-A5010
KENWOOD
SERVICE MANUAL
© 1989-4 PRINTED IN JAPAN
B51-3895-00 (O) 2713
Panel* Front glass* Metallic cabinet Knob ass'y
(A20-) (B10-) (A01-1746-01) (K29-3581-04)
Phone jack Knob Knob Remote controller ass'y
(E11-0162-05) (K27-1987-04) x 2 (K29-3632-04) (A70-0264-05)
Phono jack Miniature phone jack Slide switch*
(13-0446-35)X2 (E11-0188-05) ($31-3010-05)
Binding post Terminal board AC outlet* Power cord bushing
(N08-0128-35) (E20-0823-05) (E03-0107-05) ' (J42-0083-05)
ATTENTION
CAUTION St wereucrion wexust
8 CORRECT ETT,
ATTENTION 7002 ws
tai ast one
$i eemarin ay
o ase TION TOS
Lock terminal band * Phono jack Foot AC power cord*
(E20-)
(E13-0820-05)
(J02-1013-05)
x
4
(E30-)
Slide switch* Slide switch
($31-2132-05) ($31-2136-05)
*Refer to parts list on page 42.

Kenwood KR-A5010 Specifications

FM Tuner Section

tuning frequency range	87.5 MHz- 108 MHz
antenna impedance	300 ohms balanced & 75 ohms unbalanced
sensitivity (mono)	11.2 dBf (2.0 nV at 300 ohms)
sensitivity (stereo)	25 pV
signal-to-noise ratio (mono)	78 dB
signal-to-noise ratio (stereo)	72 dB

General Specifications

power consumption	2.0A USA Model/150 W Others
dimensions	440 (W) X 133 (H) X 284 (D) mm
weight	6.0 kg (13.2 lb)

Audio Specifications

rated power output	60 watts per channel
total harmonic distortion (mono)	0.1%
total harmonic distortion (stereo)	0.45%
input sensitivity/impedance (phono MM)	2.5 mV/47 kohms
input sensitivity/impedance (CD, TAPE, VIDEO)	150 mV/47 kohms
frequency response (phono MM)	30 Hz to 15 kHz
frequency response (CD, TAPE, VIDEO)	10 Hz to 70 kHz
stereo separation	40 dB at 1 kHz

AM Tuner Section

signal-to-noise ratio (IHF-A)	70 dB
tuning range	530 kHz- 1.610 kHz
usable sensitivity	10 pV (320 uV/m)

Summary

Listening to Broadcasts

Selection of Display Characters with TUNING/CHARACTER Key

How to select characters for station name display.

Preset Station Names and Frequencies

Guide to memorizing station frequencies and names.

Change Preset Station Name

Procedure to modify existing preset station names and frequencies.

Remote Control

Remote Control Key Functions

Explains various control keys like CD, Tuner, Tape, Input selectors.

Power, Volume, and Special Function Keys

Details on power, volume, equalizer, and surround control keys.

Disassembly for Repair

Circuit Description

Description of Components

Overview of individual components and their functions.

Tuner Unit and Microprocessor Details

Describes the tuner section and the microprocessor functions.

Explanation of Terminals

Explains the function of each terminal on the circuit boards.

Initial Setting

Describes the initial settings for the microprocessor and system.

Microprocessor Output Port Initial Setting

Details the initial state of microprocessor output ports.

Test Mode Setting

Procedure to enter and exit the test mode.

Muting Timing Charts

Visual representation of muting signal timing during operations.

Main Amplifier and FM MPX IC Descriptions

Details on main amplifier and FM MPX ICs.

AN7470 FM MPX IC

Equivalent block diagram and terminal functions for the FM MPX IC.

CX7925B PLL IC

Block diagram and terminal description for the PLL IC.

Adjustment/Reglage/Abgleich

FM Section

Adjustment procedures for the FM receiver section.

AM Section

Adjustment procedures for the AM receiver section.

Voltage Table

PC Board Diagrams

Component Side View

Layout of components on the main circuit board.

Foil Side View

Layout of traces on the reverse side of the circuit board.

Exploded View

Parts List

Specifications