Kenwood TM-321A Service Manual page 31

-321A.
ADJUSTMENT
COMMON
ADJUSTMENT
Measurement
Adjustment
Item
Condition Test
Specification/Remarks
equipment
Unit
Terminal
Unit
Part
Method
1. Setting 1)
Power supply
:
13.8V DC
Power SW
:
OFF
VOL
VR:
Fully
counter
clockwise (CCW)
SQL
VR
:
Fully
counter
clockwise (CCW)
VR6
on
TX-RX
unit
:
Fully
counter
clock-
wise (CCW)
2. Reset
1)
Turn the power
SW ON, hoid-
Display
220.000
ing the
VFO/M
and M.IN
SW down.
My
-1 appeared during 5 sec
2) Release the
VFO/M
and
M.IN SW, then,
( t
disappeared.
3.
PLL
1)
RX VCO
Digital
TX-RX
TP3
vco
Tc2
3.0V
+0.1V
FREQ, .220.000
volt- (4C) (4B)
Receive. meter
TC1
2.9V +0.1V
2)
TX
VCO
FREQ.
:
220.000
(4B)
Transmit.
4.
TX FREQ
1)
FREQ.
:
222.500 f.counter Rear
ANT
TX-RX
TC1
222.500MHz +100Hz
ADJ.
Power
panei
(1E)
(4C)
Transmit.
meter
RECEIVER SYSTEM ADJUSTMENT
Measurement Adjustment
Item
Condition
Test
Specification/Remarks
equipment
Unit Terminal
Unit
Part Method
1,
Helical
1)
FREQ.
:
222,500 Oscillo-
TX-RX
TP1
TX-RX
L1(3E) Adjust for the wave-
L2(2E)
scope
(4E) form perform shown
Connect the
sweep gen.
to the
L3(3E)
on
right.
ANT
terminal and the Oscillo-
100PF
01
scope
to the detector output.
220 222.5 225
O
2) Connect.the spectrum ana-
x
¢
Oscilloscope
or
lyzer to the TP1 terminal.
TP1
a
$2
Spectrum
from the
TX-RX
unit.
8
=
analyzer
3) Connect the
TP3 terminal to
01,2:
15599
GND
terminal.
2.
GAIN
1)
FREQ.
:
222.520
Digital
TX-RX
TP2
TX-RX
L4{4E) Repeat for MIN. Check
:
Accurate SSG's
multi- (4D)
L5(4E)
Repeat the adjustment freq.
SSG output
:
SdBu
meter
L7(4E)
in
order of
L5
and L7.
MOD
:
OFF L9(4E)
3.
Discri 1)
FREQ.
:
222.520
AF
VM
Rear SP
TX-RX
L11
AF
MAX,
Oscillo-
panel
(1B) (4D)
SSG
output
:
20dBu
scope
MOD
1kHz
852
DEV
:
£5kHz
dummy
load
4.
Tight 1)
FREQ.
:
222.520
AF
VM
Rear SP
TX-RX
VR8
Turn
the
VR8
clockwise to
Oscillo- (1B)
(4E)
Squelch
SQL
VR
:
MAX
panel
the point at which squelch
SSG
output
:
-4dBu
scope
just close, then turn the
VR8
MOD:
1kHz
82
counter clockwise to the
DEV
:
3kHz
dummy
point
at which squelch just
load
opens.
-321A.
ADJUSTMENT
COMMON
ADJUSTMENT
Measurement
Adjustment
Item
Condition Test
Specification/Remarks
equipment
Unit
Terminal
Unit
Part
Method
1. Setting 1)
Power supply
:
13.8V DC
Power SW
:
OFF
VOL
VR:
Fully
counter
clockwise (CCW)
SQL
VR
:
Fully
counter
clockwise (CCW)
VR6
on
TX-RX
unit
:
Fully
counter
clock-
wise (CCW)
2. Reset
1)
Turn the power
SW ON, hoid-
Display
220.000
ing the
VFO/M
and M.IN
SW down.
My
-1 appeared during 5 sec
2) Release the
VFO/M
and
M.IN SW, then,
( t
disappeared.
3.
PLL
1)
RX VCO
Digital
TX-RX
TP3
vco
Tc2
3.0V
+0.1V
FREQ, .220.000
volt- (4C) (4B)
Receive. meter
TC1
2.9V +0.1V
2)
TX
VCO
FREQ.
:
220.000
(4B)
Transmit.
4.
TX FREQ
1)
FREQ.
:
222.500 f.counter Rear
ANT
TX-RX
TC1
222.500MHz +100Hz
ADJ.
Power
panei
(1E)
(4C)
Transmit.
meter
RECEIVER SYSTEM ADJUSTMENT
Measurement Adjustment
Item
Condition
Test
Specification/Remarks
equipment
Unit Terminal
Unit
Part Method
1,
Helical
1)
FREQ.
:
222,500 Oscillo-
TX-RX
TP1
TX-RX
L1(3E) Adjust for the wave-
L2(2E)
scope
(4E) form perform shown
Connect the
sweep gen.
to the
L3(3E)
on
right.
ANT
terminal and the Oscillo-
100PF
01
scope
to the detector output.
220 222.5 225
O
2) Connect.the spectrum ana-
x
¢
Oscilloscope
or
lyzer to the TP1 terminal.
TP1
a
$2
Spectrum
from the
TX-RX
unit.
8
=
analyzer
3) Connect the
TP3 terminal to
01,2:
15599
GND
terminal.
2.
GAIN
1)
FREQ.
:
222.520
Digital
TX-RX
TP2
TX-RX
L4{4E) Repeat for MIN. Check
:
Accurate SSG's
multi- (4D)
L5(4E)
Repeat the adjustment freq.
SSG output
:
SdBu
meter
L7(4E)
in
order of
L5
and L7.
MOD
:
OFF L9(4E)
3.
Discri 1)
FREQ.
:
222.520
AF
VM
Rear SP
TX-RX
L11
AF
MAX,
Oscillo-
panel
(1B) (4D)
SSG
output
:
20dBu
scope
MOD
1kHz
852
DEV
:
£5kHz
dummy
load
4.
Tight 1)
FREQ.
:
222.520
AF
VM
Rear SP
TX-RX
VR8
Turn
the
VR8
clockwise to
Oscillo- (1B)
(4E)
Squelch
SQL
VR
:
MAX
panel
the point at which squelch
SSG
output
:
-4dBu
scope
just close, then turn the
VR8
MOD:
1kHz
82
counter clockwise to the
DEV
:
3kHz
dummy
point
at which squelch just
load
opens.