Kenwood AT-230 Service Manual

Spec~fication
9V?O.O5V
3.6V+O.O5V
Set to 60 mA
0.3V+ 1 dB
Item
1 9VAVR and
3.6V ad-
justment
2. Base current
Remarks
RF1
NOTE: The
slug of
Tl6
should be
turned
coun-
terclock-
Condition
SG SW ON
When making
any one of the
adjustments
ln
items 3.. 4.. 5.,
or 6.. observe
the listed order
of adjustment.
4.
IFSHIFT
check
5. VBT adjust-
ment and
check
Measurement
adjustment
3. Carrier
adjustment
@
NOTE:
IF
Unit
AF
Ter-
minal
TP-6
Pin 5.
connec-
tor @
PLL
Test
equipment
DVM
Adjustment
Unit
AF
MODE USB
METER
IP
HEATER ON
FIX ON
DRIVE Fully
clockwise
BIAS VR Rotate
,IPmeter
I
STBY REC, SG SW OFF
IFSHIFT Centered RF
VBT Fully VTVM
clockwise
MODE USB
MODE LSB
STBY REC
$
SEND
STBY R EC
MODE USB
MODE CW
STBY SEND
L
STBY REC
MODE LSB
V BT Fully
clockwise
Rotate the IF SHIFT and
check the variation
MODE
USB.
Same as above
STBY SEND
Regardless of the
IF SHIFT setting
STBY REC
IF SHIFT Centered
V BT Fully
counter-
clockwise
VBT Fully clockwise
VBT Fully counterclockwise
STBY SEND
Regardless of VBT setting
STBY REC
I
VR2
,
TC2
TC3
VR3
I
I
NOTE.
L16
TC2
Parts
VR4
VR3
IF
IF
I
f. counter
f. counter
RF VTVM
F.counter
*After
NOTE:
TI6
I
Method
9V
3.6V
TP3
TP1
IF
checking the above
0.3V
I 1
wise for
1
TP3
this adjust-
ment after
the peak
point is
determined.
USB
LS B
USB. LSB
NOTE: The
slug of L16
should be
turned coun-
terclockwise
for this
adjustment
after the
peak point
is deter-
mined.
A
Obtain the same
frequency for both
transmission and
reception.
8828.50kHz
883 1.50kHz
8830.70kHz
1.OV
8375.00kHz
-
+20Hz
Set IF SHIFT
to center
More than
+ 1 1 kHz
Less than
- 1 1 kHz
883 1.50 kHz
8828.50 kHz
Reference the
above frequency
Less than
- 1 1 kHz
1
.OV+ 1 dB
Reference the
above frequency
Less than
- 2.4 kHz
Reference the
above frequency
Less than
+70 Hz

Kenwood AT-230 Specifications

General

Brand	Kenwood
Model	AT-230
Category	Tuner
Language	English