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KRF-A4020 (En/E2T)
Operations
Preparations
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18
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.
Amplifier
Cause
• The speaker cords are disconnected.
• VOLUME is set to the minimum posi-
tion.
• MUTE is ON.
• The SPEAKERS switches are set to OFF.
• Speaker cords are short-circuited.
• The speaker cord is disconnected.
• The audio cord from the turntable is not
connected to the PHONO jacks.
• The turntable is not grounded.
Remedy
• Connect properly referring to “Setting
the speakers”.
5
• Adjust the volume to a proper level.
• Turn OFF the MUTE.
!
• Set the SPEAKERS switch(es) to ON.
0
• Turn the power off, eliminate the short-
circuiting, then turn on the power again.
5
• Connect properly referring to “Setting
the speakers”.
5
• Insert the audio cord plugs securely into
the PHONO jacks.
• Connect the grounding wire to the GND
terminal on the rear panel.
4
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.
In case of difficulty
Tuner
Cause
• No antenna is connected.
• The broadcast band is not set properly.
• The frequency of the desired station is
not tuned.
• Noise due to ignition noise from an auto-
mobile.
• Noise due to interference from an elec-
tric appliance.
• Noise due to a nearby TV set.
• The preset station belongs to a frequency
that cannot be received.
• The preset memory was cleared be-
cause the power cord had been un-
plugged for a long period of time.
Remedy
• Connect an antenna.
5
• Set the broadcast band properly.
• Tune the frequency of the desired sta-
tion.
#
• Install the outdoor antenna away from
the road.
• Turn off the power to the appliance.
• Install the receiver farther away from the
TV.
• Preset a station with a receivable fre-
quency.
• Preset the station again.
Symptom
Radio stations cannot be received.
Interference.
A station which was preset cannot
be received by pressing the corre-
sponding numeric key.
Symptom
No sound from the speakers.
The standby indicator blinks and
sound is not output.
Sound is not output from one of
the speakers.
A humming noise is generated
when the PHONO input selector is
selected.