Kenwood TM-731A Service Manual page 11
144/430mhz fm dual bander
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Also See for TM-731A:
- Instruction manual (37 pages) ,
- Service manual (77 pages) ,
- Instruction manual (36 pages)
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Digital Control Section
TM-731A/E
CIRCUIT DESCRIPTION
¢ General
The digital control section contains a single microprocessor
rotary encoder input circuits, display circuit, reset and backup
(CPU) that controls all transceiver functions. As shawn in the
circuits, and tone output circuit.
block diagram in Fig. 15, it also includes the key, switch, and
Table 8 lists the pin functions of 1C101.
Mic
PTT
UP
DOWN
~ VFO
CALL
MR
PF
a
|
MAIN
SUB
r
t
So
ENCODER
ENCODER
; OPTION
|
>
&
=
2
H
l
Se@
Fs
;) Tsu-6
|
op Gd:
!
!
7
RBE8
22
—
—
i Ke Monty |
SIGNALING
DATA a
6
FLOCK
ao
SHIFT
430MHz 8R2 STOP
|
alele
oo
REGISTER
7. | ow POWER SW
-_
a
vo
8 . =
a=
= = =
SHIFT REGISTER
ic 4
7 144MHz 8R1 STOP
33] etuch
e ~
5 5
a Prof?
DATA
EN
t= Electronic Vol. Up
=z
2
a
§
2 DATA
12
24 etH00
os 77
3CLOCK
[> Electronic Vol. Down
"ezs
;
MN4O94BS
P Electronic Vol. Switch
-
.
491
59
p60 {13
n.
ne
ne ee
fe
a?
os
SPLL DATA
<
Pree
1c 101
P63 fro
a
PI20
.
[48 | Pt21
xi
V2
A
inte
wl
4.194308 MN
LEN
14 piMMER
SW
\—
-s
41x
eos
Reser
LZ
3 CLOCK
[7 main SUB SELECT
im
i
P02
™
43
POl
peo
:
SOL OFF SW
6
_ | RESET
12
Pas
=~ MUTE 3
B9n [P1350
1
IC10G | TONE
Q102
3
°
P50
5
s
2 8
2
-
5
[es
out
_
b= MUTE 2
jee' josa a
a
ps3. lea
esc27i2iy)
SHIFT
fia
ore
va]
Ole
:
REGISTER
MUTE!
are
ere
,
.
8 cress
l
1c
3
MAIN SUB SELECT
KEY
MN4094BS
MATORIX
BUCK
UP
5C
AVR
2101
iC 102
5C
2sce7i2
ly)
LA5006M
assy
Bc
Fig. 15 Control Section Block Diagram
11
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