Icom IC-T7A Service Manual page 42

Dual band fm transceiver
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EFCH446MWN(USA
only)
o
^
02^
L203
EFCH435MWN(others)
TTT
^
'
0«>01
12nH
ol
Hi
iiiii
o
C201
D202
O.qpl
MA2S077
pPC2748
VCC
IN
GND
GND
OUT
GND
D604
D603
C6C
MA2S077 MA2S077
2p
C608
C607
2P.
.
2d
,
UHFTXiOV
UHF RX
:
0.76V
C604
rv
2p
n>r'
21
1
C614
0
001
Hh
R607
rtr
ifr
C622
0.001
THh
D605
MA132WK
~H
1
-
;
'-1
f—
e
Ji.
10k
o
S'-!-
M-'
0103
Z
MA2S077
0102
MA2S077
M-i
C613
L607
L606
0.001
22nH
22nH
-
J-CeiiJ^o
-^85
VHF
TX
:
OV
VHF RX
:1.5V
R63
VHF
TX :0V
^
I
^lOk
VHF
RX:
3.1V
R61
0101
10k
MA2S077
0.001
-p§
y
'
C65
ip
S
i
'
~
EXTMIC
AF
SPE
/
UMOD
rz
inT§P
/
GND
PI
AFO
/
VMOD
r~
REMOte
/
PLST
o
PLCK
r~
nlUD
"
^
r
PDA/UL
r
DICK
^
r
GND
AFV
"
^
CL
2NDLO
pseT
"
/
RTVCC
-
^UnE
^
PRFF
1
VCO
SHIFT
_
+3C
'
/
TXC
hVc6
.
HV
o
T1
.1
-b
rgTl
T
n
.8
.
r|
71
-i
11
•b
r|
TTr|
1
1
1
URF
1
1
GND
5FID"
VRF
zj
*5-L 55-L
O)
0^_
O)
O-v
?-p
5
8^
VHF
TX
:
OV
VHF RX
:
2.3V
O
lOOk
^
u
VHF TX
:0V
VHF RX
:
0 9V
IC301
,
TC4W53FU
MEASUREMENT
CONDITIONS
VOLTAGE
IS
MEASURED
by
DIGITAL
MULTIMETER
SUPPLY VOLTAGE
:
13.5V
2F UNIT
11-3

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