Harman Kardon HK230A Owners Manual - Page 12

Noise, Service, Custom, Installation, >>&gt

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HUM AND NOISE In any high fidelity installation, hum may be caused by the interconnection of a record player, tuner and amplifier, as a result of the cables and different grounds. If hum is experienced with your receiver, disconnect everything but the speakers from the receiver. If hum persists, reverse the AC line cord. Plug in the record player and if hum appears, reverse the record player power plug and connect a single lead from the record player chassis to the ground post on the rear of the receiver chassis. Connect your other devices in this manner. CAUTION: Hum may also be induced by defective connecting cables or by running these cables too close to a strong AC field. SERVICE MOUNTING SHELF If this instrument should not perform properly during the first two (2) years after date of purchase, contact the factory for instructions. The factory has many authorized warranty service stations in the United States. To aid us in selecting a service station convenient to you, it would be helpful if you would indicate which major city is closest to your home. Please write our Customer Service Department, Harman-Kardon, Incorporated, Plainview, New York 11803. Be sure to include the model and serial number of the unit. A brief description of your other components is often of help in answering your questions. DO NOT return this instrument to Harman-Kardon without first receiving authorization. 1?>>)> CUSTOM INSTALLATION 1. Locate and drill four 1/4 " diameter holes in mounting shelf. 2. Position and cut out front panel opening. Bottom of opening should be flush with top of mounting shelf. 3. Remove four rubber feet from unit. Rubber feet and screws are no longer used for cabinet installation. 4. Remove the two screws and washers from top of metal enclosure. 5. Install unit from front through panel cutout opening. 6. Fasten unit to mounting shelf. If Y2 " thick mounting shelf is used fasten with four No. 6 X 3/4 " long self-tapping screws and washers. If 3/4 " shelf is used fasten with four No. 6 X 1" long self-tapping screws and washers. 7. Dimensions shown for front panel opening are critical. For best results, the opening should be made slightly undersized and filed to fit. 11 33 5 64 14 13 16 (REF UNIT) 11 1 32 -1 4 DIA (4 RE QD) . 3 32 9 (REF 16 UNIT) • 11

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HUM
AND
NOISE
In
any
high
fidelity
installation,
hum
may
be
caused
by
the
interconnection
of
a
record
player,
tuner
and
amplifier,
as
a
result
of
the
cables
and
different
grounds.
If
hum
is
experienced
with
your
receiver,
disconnect
everything
but
the
speakers
from
the
receiver.
If
hum
persists,
reverse
the
AC
line
cord.
Plug
in
the
record
player
and
if
hum
appears,
reverse
the
record
player
power
plug
and
connect
a
single
lead from
the
record
player
chassis
to
the
ground
post
on
the
rear
of
the
receiver
chassis.
Connect
your
other
devices
in
this
manner.
CAUTION:
Hum
may
also
be
induced
by
defective
connecting
cables
or
by
running
these
cables
too
close
to
a
strong
AC
field.
SERVICE
If
this
instrument
should
not
perform
properly
during
the
first
two
(2)
years
after
date
of
purchase,
contact
the
factory
for
instructions.
The
factory
has
many
authorized
warranty
service
stations
in
the
United
States.
To
aid
us
in
selecting
a
service
station
convenient
to
you,
it
would
be
helpful
if
you
would
indicate
which
major
city
is
closest
to
your
home.
Please
write
our
Customer
Service
Department,
Harman-Kardon,
Incorporated,
Plainview,
New
York
11803.
Be
sure
to
include
the
model
and
serial
number
of
the
unit.
A
brief
description
of
your
other
components
is
often
of
help
in
answering
your
questions.
DO
NOT
return
this
instrument
to
Harman-Kardon
without
first
receiving
authorization.
CUSTOM
INSTALLATION
1.
Locate
and
drill
four
1
/
4
"
diameter
holes
in
mounting
shelf.
2.
Position
and
cut
out
front
panel
opening.
Bottom
of
opening
should
be
fl
ush
with
top
of
mounting
shelf.
3.
Remove
four
rubber
feet
from
unit.
Rubber
feet
and
screws
are
no
longer
used
for
cabinet
installation.
4.
Remove
the
two
screws
and
washers
from
top
of
metal
enclosure.
5.
Install
unit
from
front
through
panel
cutout
opening.
6.
Fasten
unit
to
mounting
shelf.
If
Y2
"
thick
mounting
shelf
is
used
fasten
with
four
No.
6
X
3
/
4
"
long
self
-tapping
screws
and
washers.
If
3
/
4
"
shelf
is
used
fasten
with
four
No.
6
X
1"
long
self
-tapping
screws
and
washers.
7.
Dimensions
shown
for
front
panel
opening
are
critical.
For
best
results,
the
opening
should
be
made
slightly
undersized
and
filed
to
fit.
MOUNTING
SHELF
1?>>)>
33
5
64
14
13
(REF
16
UNIT)
1
11
32
1
-
4
DIA
(4
RE
QD)
z
TOP
VIEW
1
14
16
5
MAX
3
.
32
9
(REF
16
UNIT)
•
11
<
r‹,i
4
FRONT
PANEL
ESCUTCHEON
t
PANEL
CUTOUT
FOR
CUSTOM
MOUNTING
1
FRONT
VIEW
33
2
MAX
32
2
MIN
(SHELF)
11