EasyManua.ls Logo

Kenwood KRF-A4020 Service Manual

Kenwood KRF-A4020
24 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
Page #1 background imageLoading...
Page #1 background image
Please check the tuner PCB number before change C42,43 and X1 with new one .
DIMMER
P.CALL
P.CALL
A
SPEAKERS
B
MUTE
BASS BOOST
TAPE2/
MONITOR
SOURCE
DIRECT
BALANCE
SOUND
MULTI CONTROL INPUT SELECTOR
VOLUME CONTROL
DOWN
UP
AV SURROUND RECEIVER
PHONES
BAND
AUTO
MEMORY
STANDBY
ON / STANDBY
POWER
-ON OFF–
TRAIT
REC OUT
PLAY IN
AUX
MD / TAPE1
TAPE2/
MONITOR
PLAY IN
REC OUT
PLAY IN
PLAY IN
PHONO
L
R
FM
75
GND
AM
SPEAKERS
+
--
+
R
+
--
+
L
L
R
B
A
SUBWOOFER
PRE OUT
SYSTEM CONTROL
SL16
(
XS 8
)
AC 220 -
240V
AC 110 -
120V
AC 220 -
240V
AC 110 -
120V
50 s
FM 50kHz
AM 9kHz
DE-EMPHASIS
CHANNEL
SPACE
75 s
FM 100kHz
AM 10kHz
SWITCHED TOTAL
150W MAX
AC 110 -120V/220 -240V
50/60HZ
AC outlet
(E03-0149-05)
Lock terminal board
(E70-0080-05)
Lock terminal board
(E70-0068-05)
Phono jack
(E63-0068-15)
Phono jack
(E63-1016-05)
Slide switch
(S62-0034-05)
Miniature phone jack
(E11-0347-05)
Knob
(K29-7365-12)
Knob
(K29-7365-12)
Knob
(K29-7307-14)
Front glass
(B10-3475-02)
Power cord bushing
(J42-0083-05)
Knob
(K29-7310-03)
Knob
(K27-2185-04)
Foot
(J02-1167-03)
KENWOOD badge
(B43-0302-04)
Indicator
(B12-0334-14)
Phone jack (3P)
(E11-0295-05)
Metallic cabinet
(A01-3533-01)
Phono jack
(E63-0173-05)
Slide switch
(S62-0001-05)
AC power cord
(E30-2592-15)
Slide switch
(S62-0034-05)
Panel
(A60-1585-01)
Knob
(K29-7306-14)
AUDIO VIDEO SURROUND RECEIVER
AR-304/KRF-A4020/
A4020E/A4020W
SERVICE MANUAL
© 1999-1/B51-5501-00 (K/K) 3390
Illustration is KRF-A4020 Mtype.
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

Other manuals for Kenwood KRF-A4020

Question and Answer IconNeed help?

Do you have a question about the Kenwood KRF-A4020 and is the answer not in the manual?

Kenwood KRF-A4020 Specifications

AM Tuner Section IconAM Tuner Section
tuning frequency range531 kHz ~ 1, 602 kHz
usable sensitivity16 µV / (600 µV/m)
signal to noise ratio50 dB
General IconGeneral
power consumption280 W
switched AC outlet2 (total 150 W max.)
dimensions (W x H x D)440mm x 144mm x 390mm
weight8.0 kg
Audio Section IconAudio Section
rated power output (STEREO operation, DIN)1 kHz, 0.7 % at 4 Ω. 105 W + 105 W
rated power output (STEREO operation, IEC)63 kHz ~ 12.5 kHz, 0.5 % at 4 Ω. 100 W + 100 W
total harmonic distortion0.02 % (1 kHz, 50 W, 4 Ω)
signal to noise ratio (PHONO)75 dB (IHF'66)
signal to noise ratio (CD)92 dB (IHF'66)
input sensitivity / impedance (PHONO)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)2 V / 2.2 kΩ
bass tone control±9 dB (at 100 Hz)
treble tone control±9 dB (at 10 kHz)
FM Tuner Section IconFM Tuner Section
tuning frequency range (U.K. and Europe)87.5 MHz ~ 108.0 MHz
tuning frequency range (Russia)87.5 MHz ~ 108.0 MHz (10 kHz STEP), 65.0 MHz ~ 74.0 MHz (50 kHz STEP)
usable sensitivity (MONO)1.2 µV / 13.2 dBf (40 kHz DEV., S/N 26 dB)
usable sensitivity (STEREO)45 µV / 44.2 dBf (46 kHz DEV., S/N 46 dB)
total harmonic distortion (MONO)0.2% (65.2 dBf input)
total harmonic distortion (STEREO)0.8% (65.2 dBf input)
signal to noise ratio (MONO, U.K. and Europe)65 dB (40 kHz DEV., S/N 26 dB, 65.2 dBf input)
signal to noise ratio (STEREO, U.K. and Europe)58 dB (46 kHz DEV., S/N 46 dB, 65.2 dBf input)
signal to noise ratio (MONO, Russia)63 dB (40 kHz DEV., S/N 26 dB, 65.2 dBf input)
signal to noise ratio (STEREO, Russia)58 dB (46 kHz DEV., S/N 46 dB, 65.2 dBf input)
stereo separation36 dB
selectivity64 dB
frequency response+0.5 dB ~ –3.0 dB (30 Hz ~ 15kHz)

Summary

Cautions

Resetting the Microcomputer

Procedure to reset the microcomputer to restore normal operation.

CIRCUIT DESCRIPTION

Back Up Data and Initial State

Details initial settings, backup procedures, and tuner destination lists.

Test Mode

Describes test modes for tuner and amplifier functions, including active contents.

Microprocessor Details

Explains the microprocessor and its peripheral block diagram.

Pin Descriptions

Details the function and I/O for each pin of the main microprocessor.

ADJUSTMENT

FM Section Adjustments (Excluding E,T,Q Types)

Adjustment procedures for FM sections excluding specific types.

FM Section Adjustments (E,T,Q Types Only)

Adjustment procedures specific to E, T, and Q types of FM sections.

Audio Section Adjustments

Adjustment procedures for the audio section, including idle current.

WIRING DIAGRAM

PC BOARD(Component side view)

Tuner Unit Component Layout

Component layout diagram for the Tuner unit.

Audio Unit Component Layout

Component layout diagram for the Audio unit.

EXPLODED VIEW (UNIT)

PARTS LIST

SPECIFICATIONS

For U.S.A. and Canada

Technical specifications for US and Canadian models.

For Other Countries

Technical specifications for models sold in other countries.

For UK and Europe

Technical specifications specific to UK and European models.

Related product manuals