Kenwood TS-440S Serivce Manual page 94

TS-440S
ADJUSTMEN T
• TX ADJUSTMENT
Measurement
Adjustment
Item Condition Tes t
equipment Unit
Terminal Unit Part Method
Specification/Remarks
1 . TX AMPM 1) FREQ : 14 .1750 MH z
MODE : C W
CAR LEVEL control : MA X
RF unit VR 4: CENER
Disconnect DRV connector from RF
Oscilloscope RF DRV RF
VR 5
T13 ,
16, 17
MA X
unit . Then, connect as shown right .
STBY : SEND
C
t
SCILL O
5612
SCOP E
2)
Reconnect this connector afte r
adjustment .
(1/4W )
2 . Base Current
1) FREQ : 14.1750 MH z
MODE : US B
MIC LEVEI control : MI N
CAR LEVEL control : MI N
FINAL unit VR1, VR2 : MI N
Connect Ammete r
Q+ : EXT Power suppl y
e :
Power connecto r
Adjust to minimum current with VR 1
and VR2 in the Final unit .
STBY : SEND
Ammeter Final VR1 Current drai n
(Minimum current )
+200 mA
First adjust VR1 and VR2 fo r
minimum .
Adjust VR1 for an increase of
200 mA when switched t o
TX .
Then adjust VR2 for 200 m A
over this reading .
VR2 Current drai n
(Minimum current )
+Driver curren t
(200 mA)+200 mA
3 . 1) ALC
(RF Outpu t
power )
2) Power
meter
1) FREQ : 14.1750 MH z
MODE : CW
CAR LEVEL control : ALC scale MA X
STBY : SEND
Power meter Rear panel
ANT Filter VR1 95 W Caution :
In no case shoul d
the power be adjusted fo r
greater than 110 watts .
VR6 Set to PWR mete r
95 W readin g
2) METER SW : PW R
STBY : SEND
4 . Power down
1) FREQ : 29 .7000MH z
MODE : CW
CAR LEVEL control : ALC scale MAX
Connect ACC socket pin (PD) t o
50 W from NC .
STBY : SEND
Power meter Filter VR3 50 W
±2 .5 W
2) Reconnect this connector (PD )
to NC after adjustment .
5 . Protection 1) FREQ : 14 .2000MH z
MODE : CW
Coax . cable to 1 500 dummy loa d
should be 1 m long .
STBY : SEND
1504 R F
dummy loa d
Power meter
Rear panel AN T
I
Filte r
1 m
VR2
1
30W
m
TX Pow .M
504
I I
2) ANT : OPEN
18A or less
6 . ALC meter 1) FREQ : 14 .2000 MHz Power meter Rear panel
ANT
Filter
VR4 Set to S meter "0" *If this adjustment is per -
MODE : USB
formed, step 2) Base curren t
MIC LEVEL control : MIN
must also be performed .
CAR LEVEL control : MI N
METER SW : ALC
STBY : SEN D
2) Connect the AG to MIC Jack .
AG : 1 kHz, 5 m V
STBY : SEND
Power mete r
A G
AF VM
Filter
VR4 Set to ALC mete r
starting point .
3) AG : 6 dB increase leve l
(1 kHz, 10 mV)
VR5 Adjust for maximu m
ALC scale reading
AL C
7 . Spurious FREQ : 21 .2000 MHz
Power meter RF VR4
-40 dB or less .
MODE SW : C W
CAR LEVEL control : ALC scale MA X
STBY : SEND
Spectru m
analyzer
MIN
94
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