Harman Kardon HK690I - Controls and Functions Overview; Front Panel Operation Controls; Tuning and Station Display Controls

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.
:
hoarse
|
Correct
value
Connect
the
digital
voltmeter
between
TP1
and
VR401
De
balance
|__sround.
(L
channel)
oF
tony,
adjustment
Connect
the
digital
voltmeter
between
TP2
and
VR402
0+10mV
ground.
(R
channel)
a
|
rs
R403
ids
Connect
the
digital
voltmeter
to
TP3
and
TP4.
(L
channel)
30mV
adjustment
af
VR404
Connect
the
digital
voltmeter
to
TPS
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.
ee
Station
Adjustment
eo
ve
:
display
_
location
Adjustment
method
Connect the
frequency
counter
to
TP?
(+)
and
ground
(~).
98.3
MHz
109MHz
+
2kHz
2.
AM
ALIGNMENT
Conditions:
e
Set
the
function
switch
to
AM.
Set
the
muting
switch
to
off
(=).
Item
Connections
required
|
rement
|
Suen”
Adjustment
|
adjustment
method
Loe
i
ee
lfrequency
jay
tion
Saee
Tuning
ve
Connect
the
DG
Volttietsr
to’
520kHz
|
L252
1.5V
£0.05V
voltage
iat
aejusenvent
|
Pt
(+)
and
ground
(-).
1710kHz
|
TC252
23V
+
0.5V
Radiate
output
of
AM
signal
generator
(400Hz
30%
modula- A
Mijustment
|
_
tion)
to
AM
loop
antenna,
450kHz|
1600kHz
|
1251
|
Adjust
so
that
peak
and
«Connect
oscilloscope
to
TPS
(+)
OE
«|
Abed
Wevstent:
and
ground
(—).
Radiate
output
of
AM
signal
4
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.
Auned
Radiate
output
of
AM
signal
gener-
Confirm
the
tuned
indi-
ble
ae
ator
(400Hz
30%
modulation)
to
|1000kHz
|
1000kHz
cator
lights
at
60
dB
tion
AM
loop
antenna.
bil
input.
_
|
3.5