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Harman Kardon HK690 - Page 3

Harman Kardon HK690
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os
ALIGNMENT
PROCEDURES
=
AMPLIFIER
SECTION
©
DC
balance
and
idling
adjustments
Conditions:
¢
Set
the
function
switch
to
aux/DAD.
Set
the
volume
to
minimum,
Set
the
speaker
system
switches
1
and
2
to
OFF.
Make
sure
that
primary
supply
voltage
comes
within
120
V
+
2V.
‘¢
Make
the
adjustment
at
a
room
temperature
of
25°C.
Connect
the
digital
voltmeter
between
TP1
and
De
balance
|_s"ound.
(L
channel)
Os
1ony
adjustment
Connect
the
digital
voltmeter
between
TP2
and
vR402
ot
ground,
(R
channel)
Om:
a
VR403
iain
Connect
the
digital
voltmeter
to
TP3
and
TP4.
(L
channel)
30mV
adjustment
igi:
VR404
Connect
the
digital
voltmeter
to
TP5
and
TP6.
(R
channel)
30mV
Repeat
steps
1
through
4
after
aging
for
10
minutes.
=
TUNER
SECTION
1,
STANDARD
FREQUENCY
CHECK
Condition:
«
Set
the
function
switch
to
FM.
Station’
|
Adjustment
eres
|
display
|
location
|
Aditstment
method
«Connect
the
frequency
counter
to
TP7
(+)
and
ground
(—).
98.3
MHz
109MHz
+
2kHz
2,
AM
ALIGNMENT
Conditions:
e
Set
the
function
switch
to
AM.
Set
the
muting
switch
to
off
(a).
Item
Connections
required
cee
Adjustment
method
Tuning
eCorniet
she
DE
volunater
te
520kHz
|
L252
1.5V
+
0.05V
voltage
7
2
|
adjustment
|
TP11
(+)
and
ground
(--).
1710kHz
|
TC252
23V
+
0.5V
Radiate
output
of
AM
signal
generator
(400Hz
30%
modula-
3
TF
ustment
|
_
tion)
to
AM
loop
antenna.
450kHz|
1600kHz
|
T3e)
|
Adlust
so
that
peak
and
ustment
|.
Connect
oscilloscope
to
TPS
(+)
2"
|
Good
Waveform:
and
ground
(—).
Radiate
output
of
AM
signal
|
generator
(400Hz
30%
modula-
600kHz}
600kHz
L251
Tracking
tion)
to
AM
loop
antenna.
Maximize
the
output
adjustment
|
*Connect
oscilloscope
and
AC
level.
voltmeter
to
TAPE
1
OUT
termi-
|1400kHz|
1400kHz
|
C251
nals.
Repeat
steps
4
and
5.
Tuned
‘©
Radiate
output
of
AM
signal
gener-
Confirm
the
tuned
indi-
indicator
|
ator
(400Hz
30%
modulation)
to
|1000kHz)
1000kHz
cator
lights
at
60
dB
tion
AM
loop
antenna.
input.
3.
FM
ALIGNMENT
Conditions:
Set the
function
switch
to
FM.
Set
the
muting
switch
to
off
(m=).
ae
a
Station
|
Adjustment
*
meth
:
item
a
_
Connections
required
display
|
Wcation
Hoesen
method
-
T
13
Connect
the
FM
signal
generator
|98.14MHz|
98.1MHz
|
T201
(a)
|
AUlust
so
that
the
wave-
,
forms
in
steps
1
and
2
(1kHz
100%
modulation)
to
FM
3002
BAL
ANT
terminals
become
the
same
level.
Discrimi-
through
the
3000
Ceoad
98.06MHz|
98.1MHz
|
1201
(A)
|
At
this
time
tuned
indi-
nator
2
cator
lights.
is
dummy.
adjustment
|
¢
Connect
the
oscilloscope
and
‘Adjust
so
that
the
dis-
distortion
meter
to
TAPE
1
OUT
|
98.1MHz
|
98.1MHz
|
7201
(B)
|
tortion
becomes
mini-
terminals.
mum,
Repeat
steps
1
through
3.
_
|
Tuned
Adjust
so
that
the
tuned
|
indicator
VR201
|
indicator
lights
at
10uV
“.
|
adjustment
Same
as
above.
input.
Connect
the
DC
voltmeter
to
Adjust
so
that
the
DC
Signal
TPQ
(+)
and
ground
(—).
voltage
becomes
11V
at
indicator
VR202
|
1mV
input.
And
then,
adjustment
confirm
the
five
signal
indicator
lights.
98.1MHz
(unmo-
|
98.1MHz|
VR151__
|
19.00kHz
+
0.02kHz
dulation)
Confirm
the
stereo
indi-
*Connect
the
stereo
modulator,
—
|
98
iMliz
|
98.1MHz}
VR351_|
cator
lights
at
304V
(L+
R=
45.5%,
L
—
R
=
45.5%,
Ode
inoue
19kHz
=
9%)
to
FM
signal
Sct
generator.
Set
the
stereo
modu-
MPX
«
Apply
signal
generator
output
to
lator
to
19kHz
only.
Mex
tment
|
FM300%
BAL
ANT
terminals
|
98.1MHz
|
98.1MHz
|
VR152
|
Adjust
so
that
L
and
R
through
the
3002
balanced
‘output
level
becomes
dummy.
minimum.
Connect
the
frequency
counter
to
Adjust
so
that
the
right
TP10
(+)
and
ground
(—).
channel
output
becomes
Connect
the
oscilloscope
and
AC
minimum
when
only
the
voltmeter
to
TAPE
1
OUT
left
channel
of
the
stereo
terminals.
98.1MHz
|
98.1MHz
|
VR301_|
modulator
modulated
and
so
that
the
left
chan-
nel
output
becomes
mini-
mum
when
only
the
right
channel
modulated.

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