Kenwood KRF-A4030 Service Manual

FM
(T90-0836-05)
(A70-1266-05): RC-R0709........KPMX
(A70-1267-05): RC-R0708........E1E2E3
indoor antenna AC plug adaptor (1)
(E03-0115-05)
(1)
AM
(T90-0852-05)
loop antenna (1)
Batteries (R06/AA) (2)
*Use to adapt the plug on the power
cord to the shape of the wall outlet.
(Accessory only for regions where use
is necessary.)
Remote control unit (1)
AR-404/KRF-A4030/A4030E/A4030-S
2
CONTENTS / ACCESSORIES / CAUTIONS
CONTENTS / ACCESSORIES / CAUTIONS............. 2
CIRCUIT DESCRIPTION............................................3
ADJUSTMENT............................................................6
PC BOARD ................................................................ 7
SCHEMATIC DIAGRAM .......................................... 11
EXPLODED VIEW ....................................................20
PARTS LIST..............................................................21
SPECIFICATIONS ....................................................27
Contents
Accessories
Resetting the Microcomputer
If the microcomputer may malfunction (unit cannot be
operated, or shows an erroneous display) if the power cord
is unplugged while the power is ON, or due to some other
external factor. If this happens, execute the following pro-
cedure to reset the microcomputer and return the unit to its
normal operating condition.
For U.S.A. and Canada
Unplug the power cord from the wall outlet, then
plug it back in while holding down the POWER key.
Except for U.S.A. and Canada
With the power cord plugged in, turn the POWER key
OFF. Then, while holding down the ON/STANDBY
key, press the POWER key.
•Please note that resetting the microcomputer will clear
the contents of the memory and returns the unit to the
state it was in when it left the factory.
Cautions
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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