Kenwood KRF-A4030 Service Manual

SPEAKERS
+ -- +
R
+ -- +
L
LR
B
A
FM
75Ω
GND
AM
ANTENNA
REC OUT PLAY IN
AUX MD / TAPE1 TAPE2/
MONITOR
PLAY IN REC OUT PLAY IN PLAY IN
PHONO CD
L
R
Phono jack
(E63-0068-15)
Miniature phone jack
(E11-0293-05)
Power cord bushing
(J42-0083-05)
AC power cord *
(E30-)
Lock terminal board
(E70-0052-05)
Phono jack
(E63-0047-15)
Phono jack *
(E63-)
Lock terminal board
(E70-0047-05)
AC outlet *
(E03-)
* Refer to parts list on page 21 .
70%
AUDIO RECEIVER
AR-404/KRF-A4030/
A4030E/A4030-S
SERVICE MANUAL
© 2000-1/B51-5595-00 (K/K) 3174
A SPEAKERS B
STANDBY
POWER
MULTI CONTROL
SOUND
SOURCE DIRECT
AUTOBAND MEMORY
INPUT SELECTOR
VOLUME CONTROL
UPDOWN
BALANCE PTY TA/NEWS DISPLAY
PHONES
ON/STANDBY
ON OFF
TAPE 2/MONITOR
Indicator
(B12-0385-04)
Knob *
(K29-)
Front glass *
(B10-)
Panel *
(A60-)
Knob *
(K29-)
Knob *
(K29-)
Knob *
(K29-)
Knob *
(K29-)
Knob *
(K29-)
Phone jack
(E11-0127-05)
Knob *
(K27-)
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299

Kenwood KRF-A4030 Specifications

Audio Specifications

Rated power output during STEREO operation (DIN)	105 W + 105 W
Rated power output during STEREO operation (IEC)	100 W + 100 W
Total harmonic distortion	0.02 %
Signal to noise ratio (PHONO MM)	75 dB
Signal to noise ratio (CD)	92 dB
Input sensitivity / impedance (PHONO MM)	2.5 mV / 27 kΩ
Input sensitivity / impedance (CD)	200 mV / 47 kΩ
Output level / impedance (TAPE REC)	200 mV / 2.2 kΩ
Output level / impedance (PRE OUT SUBWOOFER)	2 V / 2.2 kΩ
Tone control (BASS)	±9 dB (at 100 Hz)
Tone control (TREBLE)	±9 dB (at 10 kHz)

AM Tuner Specifications

Tuning frequency range	531 kHz ~ 1, 602 kHz
Usable sensitivity	16 µV / (600 µV/m)
Signal to noise ratio	50 dB

General Specifications

Power consumption	280 W
AC outlet (SWITCHED)	2 (total 150 W max.)
Dimensions (W x H x D)	440mm x 144mm x 389mm
Weight (Net)	8.0 kg

FM Tuner Specifications

Tuning frequency range (U.K. and Europe)	87.5 MHz ~ 108.0 MHz
Tuning frequency range (Russia)	65.0 MHz ~ 74.0 MHz
Usable sensitivity (MONO)	1.2 µV / 13.2 dBf
Usable sensitivity (STEREO)	45 µV / 44.2 dBf
Total harmonic distortion (MONO)	0.2%
Total harmonic distortion (STEREO)	0.8%
Signal to noise ratio (U.K. and Europe, MONO)	65 dB
Signal to noise ratio (U.K. and Europe, STEREO)	58 dB
Signal to noise ratio (Russia, MONO)	63 dB
Signal to noise ratio (Russia, STEREO)	58 dB
Stereo separation	36 dB
Selectivity	64 dB
Frequency response	+0.5 dB ~ –3.0 dB

Summary

CIRCUIT DESCRIPTION

CIRCUIT DESCRIPTION (Continued)

4.2 Microprocessor Pin Descriptions

Provides detailed descriptions of the microprocessor's pin functions.

ADJUSTMENT

FM Section Adjustments

Covers adjustments for FM section, including distortion and tuning level.

Schematic Diagram - TUNER UNIT

TUNER UNIT (X05-498X-XX) Schematic

Detailed schematic diagram for the tuner unit.

Schematic Diagram - Main Board

Main Board Schematic

Schematic diagram of the main audio and control circuits.

PARTS LIST - Audio Unit Diodes, Transistors, ICs

Parts List - Audio Unit Diodes and Transistors

Lists diodes and transistors for the audio unit.

Parts List - Audio Unit ICs

Lists integrated circuits (ICs) for the audio unit.

PARTS LIST - Transistors, ICs, and Readme

Parts List - Transistors and ICs

Lists transistors and ICs used in the unit.

SPECIFICATIONS

AUDIO Section Specifications

Details audio performance specs like power output, distortion, and noise ratio.

FM/AM Tuner Section Specifications

Provides tuner sensitivity, selectivity, frequency response, and SNR specs.