Section 8 Optional Units; Tone Squelch Unit - Icom IC-2000 Service Manual

SECTION
8
OPTIONAL
UNITS
8-1
UT-85
TONE SQUELCH
UNIT
TX. RX, S.2V
DCS
SC LK
I
OFT n
5?n
A
T
A
J
JS
VSS STS
REF
TLiNP
XOLTT
XIM
TLINN VDD
TLIMO
TX.O
RXrONE
.RX_0
'
TSrOME
TXIW
AGNDIN
TYiMn
AGND
RXIMO
0JAS
RXJN
12
n
10
ICl
AK2341
4.?
TX. RX: 2.8V
4
Ri1
A/W—
C7 J-
47P
-wv
Rl£
23K
3.4V
CK
DATA
5T6TO
RU23K
El
J
CS
0.'001
TX,
RX: S.6V
276nS
r\
ov
0.5V
RM
1M
lep-r
A,
XI
HOH
rh
C13
IBP
GNO
TONE
UNrrr
C«D
DETO
rSOL
H-
A t
-roj ^'*Cn
4.7
CK
DATA
STBTO
GMD
Ir^V
Give
/T7
G^iD
o
-o
-o
o
-o
o
o
o
-o
-o
o
o
maim
UNIT
J4
rn
to
MAIN UNIT
(J4)
8-1