Kenwood TS-830S Service Manual page 45

Display f.
(kHz)
I
I
C
VFO-230 BLOCK DIAGRAM
B P F
Refer to Block Diagram
B P F.
VFO f.
:MHz)
0 1
I
I
5MHr
1
o s c
-0-
0 2 . 3
4
8
T
ZSC18151YlX2 4 W -
I
I
f 10999BKHz
M I X
6 Dlgii
-
0 5
-
BCD Colmler
3SK74 1 GR
I
I C8
TC5032P
I
I
- -
2SC1815 I Y I
I
A
4.520-
t
4 5399eMHz
1
460
02-
480KHz
20- 5Hz
39.98KHz
M I X - 3 B P F
M I X - 2
112 Dtvtder
7regrnenr
B P F
I C -
IC25
-
L.P.F. C-- 112
-
Decoder
I
IC26
-
C F l
-
SN16913P
SN16913P
I C9
I I I
-@-
SN74LS247N
Drtver
O~splay
027-38.10
4
-
-7
2SA10151 Y b Y
9 B T 12
I
I10 110
X I 2
Expander Expander
-
IC17 P
l C l 0
'
3
pPDB243C pPD8243C
I
4-i.
5.4-
6.09998MHz
T I
VC0.2 A c ~ i v e PD 2 M.P.U
L P.F.
I
015.16
-
I C . IC24
Q19-21
l C l l
pPD8048C 155
2SC18151 Y i X 2 2SC1775E X 3
TC5081 P
-
Input
M.P.U
-
Control
2KH2 20KHz 5 W K H r 5MHz
O~vider
IC3-6 1c7 IC2
1OMHz
OSC
-
, 7 4 , , , T C 4 5 1 , P TC4027.P
-
2SC1,3"5;9Y , x 2 - ' o q 'OM""'
X4
--------
I
J
lC12 14 Bit
BCD data (l/M)
7 4 2 ~ ~ 0 f T IC6 (Pin 12)
(MHz)
@
output f. (kHz)
@
- &
input f. (kHz)
@
(Note) BAND: 0 0 .O MHz (ex. 14.0 MHz)
Table 13. Frequency chart
IC18 7 Bit
binarv ( l / N )
IC27 G p u t f.
(kHz)
a