Harman PM645 User Manual

The POWER indicator does not
light up when the POWER
switch is pressed.
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 checklist. Also check other related components
such as the tuner, turntable, speakers and other electrical
equipment you use with this amplifier.
| Problem | Cause |
eThe power cord is not plugged in.
The POWER indicator lights up.
but no sound is heard.
Remedy |
ePlug in the power cord securely.
eThe TAPE MONITOR selector is in the
“tape 1” or “tape 2” position.
eThe FUNCTION selection was not made
properly.
eThe SPEAKERS .1 and 2 switches are
set to the OFF position.
eThe speaker wires are disconnected or
broken.
eSet the TAPE MONITOR selector to the
“source” position.
eSet the FUNCTION selector to the proper
position for the desired program source.
ePress the SPEAKERS 1 or 2 switch.
eCneck the speaker wires and connect
them correctly.
Sound is not heard from the
speaker system on one side.
eThe connection of a speaker wires are
incorrect or incomplete.
eThe connection wires to other equip-
ment are disconnected.
eThe BALANCE control knob is turned
to either the extreme right or the left
position.
When listening to stereo sound,
the left and right sounds are
reversed.
The left and right speaker wires are
reversed.
The left and right wires connected to
other equipment are reversed.
The MODE selector is set
“reverse” position.
to the
eCheck the speaker wires for disconnec-
tion or breaking and reconnect them
correctly.
eCheck the wires for disconnection and
connect them correctly.
eSet the mark on the BALANCE control
knob to the centre position.
eCheck the speaker wires and connect
them correctly.
eCheck the wires to other equipment
and connect them correctly.
eSet the MODE selector to the “stereo”
position.
J —…— — ——"—"—"—_——<———— — ——
When playing to a turntable, a
low-pitched noise (“hum or
“buzz") is heard.
The ground wire of the turntable is
disconnected.
The connections of the turntable wires
are incorrect or incomplete.
When increasing the volume
level while playing a turntable,
an undesireble prolonged
sound (howling) is heard.
| n
e'Howling” is created by the speakers
and turntable.
eToo much is
present.
low frequency sound
Sound quality is poor.
elnput components have not been set
up correctly.
eTone control is not proper.
eMake the ground wire connection cor-
rectly.
elnsert the turntable wires into the
PHONO INPUT jacks of this unit secure-
ly.
ePlace the speakers further away from
the turntable.
ePlace the turntable on a more solid
surface.
eDecrease the setting of the BASS
control knob and/or turn off the BASS
CONTOUR switch.
eTurn on the SUBSONIC filter switch.
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eCheck the antenna of the tuner, car-
tridge of the turntable, or head of the
tape deck, etc. and make corrections
as needed.
eAdjust the BASS and/or TREBLE con-
trol knobs to obtain a desired tone.

Harman PM645 Specifications

General

Brand	Harman
Model	PM645
Category	Amplifier
Language	English