Kenwood KRF-A4020 Service Manual

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
75Ω
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

Kenwood KRF-A4020 Specifications

AM Tuner Section

tuning frequency range	531 kHz ~ 1, 602 kHz
usable sensitivity	16 µV / (600 µV/m)
signal to noise ratio	50 dB

General

power consumption	280 W
switched AC outlet	2 (total 150 W max.)
dimensions (W x H x D)	440mm x 144mm x 390mm
weight	8.0 kg

Audio 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 distortion	0.02 % (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

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 separation	36 dB
selectivity	64 dB
frequency response	+0.5 dB ~ –3.0 dB (30 Hz ~ 15kHz)