Harman Kardon HK6250 - Troubleshooting; Power and Sound Issues; Audio Channel and Noise Problems

TROUBLESHOOTING CHECKLIST
Most of the problems consumers have with their high fidelity
system are due to incorrect operation. If this unit does not
operate as you intended, first check the items in the following
Problem
The POWER indicator does not
light up when the POWER
switch is pressed.
¢ The power cord is not plugged in.
checklist. Also check other related components such as the
tuner, turntable, speakers and other electrical equipment you
use with this amplifier.
Plug in the power cord securely.
The POWER indicatorlights up,
but no sound is heard.
@ The TAPE MONITOR selector is in the
Tape 7 or Tape 2 position.
¢ The SOURCE selection was not made
properly.
¢ The SPEAKERS selector is in the Off po-
sition.
¢ The speaker wires are disconnected or
broken.
Set the TAPE MONITOR selector to the
Source position.
Set the SOURCE selector to the proper
position for the desired program source.
Set the SPEAKERS selector to the posi-
tion of your desired speaker system(s).
Check the speaker wires and connect
them correctly.
Sound is not heard from the
speaker system on one side.
* The connection of speaker wires is incor-
rect or incomplete.
® The connection wires to other equipment
are disconnected.
¢ The BALANCE control knob is turned to
either the extreme right or left position.
Check the speaker wires for disconnec-
tion or breaking and reconnect them cor-
rectly.
Check the wires for disconnection and
connect them correctly.
Set the mark on the BALANCE control
knob to the center position.
When listening to stereo
sound, the left and right sounds
are reversed.
When playing a turntable, a
low-pitched noise (“hum" or
“buzz") is heard.
© The left and right speaker wires are re-
versed.
e The left and right wires connected to other
equipment are reversed.
e The ground wire of the turntable is discon-
nected.
¢ The connections of the turntable wires are
incorrect or incomplete.
Check the speaker wires and connect
them correctly.
Check the wires to other equipment and
connect them correctly.
Make the ground wire connection
correctly.
Insert the turntable wires into the PHONO
jacks of this unit securely.
When increasing the volume
level while playing a turntable,
an undesirable prolonged
sound (howling) is heard.
e “Howling” is created by the speakers and
turntable.
¢ Too much low frequency sound is pres-
ent.
Sound quality is poor.
Place the speakers further away from the
turntable.
Place the turntable on a more solid sur-
face.
Decrease the setting of the BASS control
knob.
Turn off the Loudness switch.
¢ Input components have not been set up
correctly.
¢ Tone control is not proper.
Check the antenna of the tuner, cartridge
of the turntable, or head of the tape deck,
etc. and make corrections as needed.
Adjust the BASS and/or TREBLE control
knobs to obtain the desired tone.