Kenwood TK-890 Service Manual page 17

F
FINAL UNIT (X57-5620-XX) (C/3)
D4
ANT SW
ANT SW
D3
C23
MA4PH633 470p
8T
COMBINER
D803
1SS355
X57-5620-XX(C/3) C19
-10 TK-890/890(B) K 4p
-11 TK-890(B) K2 3p
-12 TK-890(B) K3 5p
G
SCHEMATIC DIAGRAM
D5
FORWARD
WAVE
RECTIFICATION
L4
L5
D6
HSM88AS
FORWARD
WAVE
C817
RECTIFICATION
100p
R810 R811 R812
150k 220k 270k
R809
10k
DC AMP
IC802
OP291GS
R815
10k
C24 C27 C28 C30 C37 C38 C816
4p 5p 5p 5p 5p 5p NO
4p 3p 5p 4p 5p 5p NO
6p 7p 7p 6p 6p 7p 1200p
H
TK-890/890
D7
HSM88AS
REFLECTED
WAVE
C818
RECTIFICATION
100p
R14 R817
100 68k
Note : The components marked with
100 100k
a dot ( • ) are parts of layer 1.
82 56k
I J
(
CN3
CN104
RA
RA
CN4
L7
ANT
+46.02dBm
X57-5620-XX (C/3) 2/2
B )
1
2
3
4
5
6
7
13