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Troubleshooting
If your HK6850 or HK6950R does not operate as
expected, first check the items in the following list. If
you cannot determine the source of the problem,
contact your dealer or authorized Harman Kardon
service representative.
No lights on the front panel.
1. Power cord is not plugged into power outlet.
2. Wall outlet or extension cord is faulty. Check
for poor connections and/or blown fuse.
3. Breaker on plug strip has tripped. Reset
breaker.
The PROTECT
light goes on and stays on
1. The unit is overheated. Make sure that the unit
is receiving adequate ventilation. Also check to make
sure that the SPEAKER OPERATING MODE switch
is set to 4Q if you are using 4-ohm speakers (using the
8Q setting with 4-ohm speakers can cause overheat-
ing). Be sure you give the unit adequate time to cool
off; the PROTECT light will remain on until the unit
is cool enough to operate safely, which may take 60 to
90 minutes. Your amplifier will cool off more quickly if
you turn off its power switch.
2. Speaker wires are touching one another,
causing a short circuit that activates protection
circuits that shut down the amplifier. Check the
speaker wires.
3. If you have ensured that the unit is not over-
heated and even with the speaker wires completely:
disconnected, the PROTECT light still remains on,
take the unit to an authorized Harman Kardon service
center for service.
No sound.
1. Speakers are connected to wrong set of speaker
terminals.
2. SPEAKER selector is not switched to correct set
of speakers.
3. Speaker wires are touching one another,
causing a short circuit that activates protection
circuits that shut down the amplifier.
4, SOURCE selector has not been switched to the
source currently playing.
5. TAPE MONITOR selector is switched to 1 or 2
while the source currently playing is CD, PHONO,
TUNER, AUX or VIDEO. Switch TAPE MONITOR
selector to SOURCE.
No sound from tape deck
1. TAPE MONITOR selector has not been
switched to the correct unit.
2. Tape deck is plugged into the wrong set of input
jacks.
3. Output of tape deck is plugged into OUT on
back of amplifier. Plug OUT on tape deck into IN on
amplifier.
Turntable sound is extremely faint
1. Turntable has been connected to wrong set of
input jacks. If turntable has a moving magnet car-
tridge, connect cables to the PHONO MM jacks; if
turntable has a moving coil cartridge, connect cables
to PHONO MC jacks.
Low-pitched hum or buzz from turntable
1. Ground wire from turntable has not been
connected securely to ground terminal on amplifier.
2. Cable from turntable is too close to power cords
or speaker wires.
3. Tiny wires connecting cartridge to turntable
arm are not firmly connected.
Low frequency oscillation or "howling" when
playing turntable
1. Too much bass boost is being applied. Turn off
LOUDNESS and/or reduce amount of BASS tone
control boost. Turn on the SUBSONIC filter.
2. Turntable is too close to speakers.
3. Turntable is placed on unstable surface.
Speakers lack bass
1. Polarity of one speaker has been reversed.
Check speaker wires and ensure that the + terminal
on the amplifier is connected to the + terminal on the
speaker.
Sound quality of tuner is poor
1. Tuner's antenna is not connected or is not
positioned properly.
Tone control is not functioning
1. The TONE DEFEAT switch is on, bypassing
the tone controls.
2. The PREAMPLIFIER BYPASS switch is on,
bypassing the tone controls.
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