Yaesu FT-840, Service Manual

Page: 125 / 152

(option)
Tuner Main Unit Circuit Diagram
, - - - - - - - - - - - - - ------------------------------------------------ ---------------------,
J6401
P 1 090255
ANT
JP6403
T93 1 1 50 1
TX
I
T U N E R - M A I N U N I T F 3 2 4 8 0 0 0 A
Q ci.>
.,.o ,.,
e�-
� a.>
.,,o �
w "' -
u °"
<(
...J
� -
0 0
.. (')
<0 1
CJ<(
RL6408
AGP2003 DC l 2V
Rl6409
AGP2003 DC 1 2V
r--------
,.._ CD
o _
�o
u ·
0
I.Il a.
Oo
°" o
�N-
o CD
::;
-
W O
uei
RL64 1 0
AGP2003 DC l 2V
RL64 1 1
AGP2003 DC 1 2V
C03
C02
C 0 1
C06
C 0 4
co CD
�-
'°o
u ·
0
'° a.
Oa
�a-
u -
::;
-
W O
u ·
0
R6401
47 1 /2W
§�I
U O
R6402
47 1 /2W
E�I
W O
u •
0
R6403
47 1 /2W
�"'
;;sol
Uo
R6406
47 1 /2W
,._ ID
'.151
�o
R6407
47 1 /2W
RL64 1 2
AGP2003 D C l 2V
RL64 1 3
AGP2003 D C 1 2V
06405 HSM2838
NOTE :
CAPAC I TOR VALUE9 ARE I N µ F . SOY :
CTI CAPAC I TOR VALUES ARE TANTALUM
I NDUCTOR VALUES ARE I N H
UNLESS OTHERW I SE NOTED .
co al
�-
.., o
u '
0
RL64 1 4
AGP2003 DC 1 2V
C64 1 3
0 . 0 1 a
F R L
C 0 3
C 0 2
C O l
C04
O c.
... L/)
W N
u ­
>
L 0 2
L 0 3
L04
L O S
L 0 7
L O I
_ co
':1-I
w O
u ·
0
R64 1 0
47 1 /2W
��I
R64
�lei
47 1 /2W
a�I
'° o
Wei
R64 1 2
47 1 /2W
L O S
L6406
2 . 55µ
JP6401
T9206 1 54
JP6402
T9206 1 53
r----- - - --J
I
I
- - - - - - - - - - - - - - - - - - - - - - - - - - ----- - - - - - ---------- - - - - - ----------�
FT-840 Technical Supplement
L6407
2 . 55µ
L6408
2 . 55µ
FRl
C03
C02
C O i
cos
cos
C04
GND
l 0 1
L02
L03
L04
LOS
l06
L07
1 3 . SV
7E-9