Kenwood TK-762 User Manual

TK-760/762
CIRCUIT DESCRIPTION
ANT
DET
1st LOCAL OSC (PLL)
IC2 (2/2) IC403 (1/2) IC403 (2/2) IC405 (1/2)
AF AMP LPF HPF BEF 0406
IC6 020
IC11
AFPA SP
VOL UP/DOWN
Fig. 2 Receiving system
2-5.
Wide/Narrow switch
Each channel can be set as a wide or narrow
channel by switching between CF201 : CFWM455F
(Wide) and CF202 : CRWM455G (Narrow). The
WIDE (high) signal and NARROW (Iow) signal are
output from IC10 (I/O port expansion) pin 13.
When the WIDE signal is output, 0201 turns off and
0202 turns on. When the NARROW signal is out-
put, 0201 turns on and 0202 turns off.
A high or low signal is output to 0201 and 0202
to switch between CF201 and CF202. 0204 turns
R221 on or off to change the IC7 (IF system) detec-
tion output level for WIDE/NARROW.
'" +
<D
N
U
0204
----
I
IC7
IF SYSTEM
3 MXI
5 LMI
R55 C61
AFO 1-=
9
:...-iWv-....-- .. n·---';> DET 0 UT
C201
C202
IC10
(I/o port expansion)
'------------------ ........ -----< 13 pin
WIDE: "H", NARROW: "L"
WIDE:"H"
NARROW: "L"
5C
Fig. 3 Wide/Narrow switch
21
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Kenwood TK-762 Specifications

General

Brand	Kenwood
Model	TK-762
Category	Two-Way Radio
Language	English