Akai AT-K02 - Page 11

a
Frequency Counter to Test
HOF
a9
pi
-
Free
VR6
10
kB
76.00
kHz
|
Point.
ee
ie
ae
Refer
to
NOTES
4,
5.
Confirmation
'
98
MHz,
60
dB
(stereo)
input.
11
of
Stereo
No
lighting
of
stereo
indicator
indicator
Lighting
indicates
no
stereo
separation.
Minimum
2) ——— ete Rs bee oS
Pilot Signal VR3 100 kB
| 98 MHz, 60 dB (stereo) pilot
2
:
;
i
Cancel
L6
output
signal
only
input.
|
ees
:
98
MHz,
60
dB
(stereo)
Leh
13
(L
Fs
nee
VRS
20
kB
More
than52dB
_
input.
‘
e
|
Minimum
output
of
Rch.
St
S
3
98
MHz,
60
dB
(stereo)
Reh
14
aio
VR4
20
kB
More
than
52dB
input.
|
8
i
'
Minimum
output
of
Lch.
Sienal
indicat
98
MHz,
50
dB
(mono)
input.
Adjust
VR2
to
a
point
15
peer
VR2
100
kB
where
Sth
LED
of
SIGNAL
INDICATOR
lights
up.
eencliiily | Refer to NOTE 6.
ee ee ee eae, : ages ee 5 Sees Sl
Chart-1
NOTES: 1. Set the FM ANTENNA ATT. switch to DIST.
.
When
the
specified
sensitivity
of
6
dB
cannot
be
obtained
at
the
two
frequency
points,
88
MHz
and
108
MHz
repeat adjustment
as
in
Step
7.
_ When the distortion factor of the sensitivity still does not comply with the data specifications, adjust by
turning the Front End FM IF coil (T1) core but not more than 1/2 turn.
. When connecting a frequency counter, connect from TP via a 100 kohmss resistor.
. The free Running Frequency of the PLL IC must be an exactly 76.00 kHz.
. The Sth LED lights up at 50 dB but when the attenuator is decreased 2 dB it is extinguished.
to
wo
Dns
BAR ANTENNA CORE
Fig. 7 Bar Antenna
2. AM TUNER SECTION ADJUSTMENT (Refer to Figs. 5, 7)
[Step Adjustment Item | Adjustment Point Result Remarks |
:
|
Low
Range
Scale
!
!
BeleciOn
a
aye
|
pol.
|
Fl
carion
T2
(RED)
Maximum
Output
|
530
kHz
50
dB
input.
| Error: Within 2%
t sf oa 7 aaa a ln acs aes ws ne eet oS = Me ee ae ees |
ae bee | T4 (BLK) Maximum Output 530 kHz 50 dB input.
287
Sarai
TS
(BLK)
Minimum
Distortion
Less
than
10%
Distortion
y Bar Antenna Core Factor | Factor
"High Range Seale | 1,600 kHz 50 dB input.
| ? : indication | wie MaxununeQuiput Error: Within 2%
|
=
re
~
——
panne
ae
on
~~
pa
Berens
Hich
Range
Maximum
Output
—«1,600
kHz
50
dB
input.
4
8
ee
=
VC
1
.
Minimum
Distortion
|
Less
than
10%
Distortion
Sensitivity
Factor
|
Factor
Chir t-2
NOTE:
For
best
results,
repeat
Steps
|
through
4
two
or
three
times.
re
1]