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Harman Kardon HK3400 - ALIGNMENT PROCEDURES; Idling Current Adjustment; AM Adjustment; FM Adjustment

Harman Kardon HK3400
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ALIGNMENT
PROCEDURES
(REFER
TO
PAGES
14
THROUGH
17
AND
28
THROUGH
32)
Conditions:
@Set
the
Volume
control
to
minimum.
@Set
the
Speaker
switches
to
1
position.
@Set
the
Speaker
Operating
Mode
switch
to
“80”
position.
@
Make
the
adjustment
at
a
room
temperature
of
77°F
(25°C).
@
After
the
Power
switch
is
pushed
on,
wait
for
30
minutes
before
measuring
to
be
sure
of
the
most
stable
operation.
IDLING
CURRENT
ADJUSTMENT
Connect
the
Digital
Volt
Meter
to
TP401
and
TP403.
VR401
(L
ch)
40mV
+2mV
Connect
the
Digital
Volt
Meter
to
TP402
and
TP404.
VR402
(R
ch)
40mV
+2mvV
BAM
ADJUSTMENT
Conditions:
@Set
the
AM
mode
by
pressing
the
“AM”
button.
@Set
the
Seek
switch
to
off
(put
out
seek
indicator)
position.
@Standard
modulation
of
the
AM
signal
Generator
is
400Hz
at
30%.
*Connect
the
AM
Test
Loop
1400kHz
|
1400kHz
Maximum
output
level
Antenna
cable
into
the
output
and
symmetrical
curve
on
jack
of
AM
Signal
Generator
|
%*1404kHz
|
*1404kHz
scope.
(80
dB
V
signal).
Tracking
Place
AM
Test
Loop
Antenna
600kHz
600kHz
Maximum
output.
close
enough
to
couple
signal
into
the
AM
Loop
Antenna.
*603kHz
|
>603kHz
*
Connect
the
VTVM
and
oscillo-
scope
to
the
OUTPUT
jacks.
international
and
Australia
models
FM
ADJUSTMENT
Conditions:
@Set
the
FM
mode
by
pressing
the
“FM”
button.
@Set
the
Seek
switch
to
off
(put
out
seek
indicator)
position.
1kHz,
75kHz
modulation
*1kHz,
40kHz
modulation
L+R=45.5%,
L—R=45.5%,
19kHz=9%
XL+R=22.5%,
L—R=22.5%,
19kHz=8%
*
International
and
Australia
models
Discrimi-
|
*
Connect
the
FM
Signal
Gener-
|
97.9MHz
|
97.9MHz|
1201(A)
Adjust
so
that
the
TUNED
nator
ator
to
FM
3000
BAL
Antenna
indicator
lights
in
the
terminals
through
the
3000
ba-
same
range
on
both
plus
lanced
dummy.
(+)
and
minus
(—)
sides
{1mV(65dBf)
input
signal]
of
97.9
MHz.
*Connect
the
Oscilloscope
and
Distortion
meter
to
the
Tape
1
97.9MHz
|97.9MHz|
1T201({B)
OUTPUT
jacks.
*
Set
the
Seek
switch
to
on
(seek
Repeat
steps
1
and
2
for
optimum
sensitivity.
indicator
lights)
position.
97.9MHz
|
97.9MHz
VR201
Adjust
VR201
so
that
the
waveform
is
disappear
at
30
dBf
input.
«Connect
the
Stereo
Modulator
Adjust
so
that
the
left
to
FM
Signal
Generator.
Con-
channel
output
becomes
nect
FM
Signal
Generator
to
FM
minimum
when
only
the
3000
BAL
Antenna
terminal
right
channel
of
the
through
the
3000
_
balanced
Stereo
Modulator
is
mod-
dummy.
(65
dBf
input
signal)
97.9MHz
|
97.9MHz
ulated.
*
Connect
the
VTVM
and
Oscillo-
scope
to
the
Tape
1
OUTPUT
Adjust
so
that
the
right
jacks.
channel
output
becomes
minimum
when
only
the
left
channel
of
the
Stereo
Modulator
is
modulated.

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