Kenwood TS-830S Service Manual page 5

CIRCUIT DESCRIPTION
7 ,IOU
1.6.3.5M
44Y
~ B M Z8M 21.24.CiM
115.83-19.33) (10.33-12.83) (22.83-23.33)
(26.83-27.33)
(36.83-38.83) (29.83-33.83)
VC 0 VC 0 VCO VCO
v c o VC 0
COUNTER
T h ~ s counts the 5 0 0 kHz to 1 MHz signal
w h ~ c h the PLL unit generates b y mixing
the VFO output w l t h 5 NI Hz (halved f r o m
the 10 N l Hz reference frequency) Gate,
latch, and preset pulses are generated
f r o m a 1 0 Hz pulse generated b y d l -
v ~ d ~ n g 1 kHz, s u p p l ~ e d from the PLL, b y
1 0 0 .
Fig. 2 TS-830 PLL circuit configuration
BAND
1 . 5
3 . 5
7
10
14
18
Band information
from RF unit
A m p A m p
Heater
Fig. 3 Counter unit block diagram
lODK
0
0
5
5
5
5
CON
1 M
1
3
6
9
3
7
Q
1
oz
2SCt815(Y) 2SC1815(Y)
9-BT- 1 2 Blanking information
4
Segment
H (approx. 5V): Display
Gate Counter driver
-
L Blank
10M
0
0
0
0
1
1
-
-
03C
1/,
0 4
' S N 7 4 0 0 N
T C 4 0 2 9 B P
02
-
Display tube
4 . 7 Vrms
-
010 011
,
BLlc
TC5066BP
T C 5 0 6 4 B P
DCBA
1 0 0 0
1 1 0 0
1 1 0 1
0 1 1 1
1 1 0 1
l o l l
I
1 / I 0 0 devider 1 /2 devider
~
012,013
,
-6
1K
l K r
0 . 5
H
H
L
L
L
L
1 M
0
4
7
8
8
9
BAND
21
2 4 . 5
28
2 8 . 5
29
29.5
approx
2 ~ ~ 1 9 5 9 ~ x 2
- : v
- 2 4 V
'
DC-DC
Clock
0 6
T C 4 5 1 8 B P
IOOK
5
0
5
0
5
0
10M
2
2
2
2
2
2
__,
WIL-
Q3A,B
-
S N 7 4 0 0 N
-
5Hz
5
DCBA
0 1 1 1
1 1 1 0
l o l l
1 0 1 0
1 0 0 1
1 0 0 0
Preset pulse
-
TC4081BP
-
w
Latch pulse -
12
-
DCi2V DH switching
0 . 5
L
H
L
H
L
H
Q5
TC5070P
6 Digit counter
100kHz, 1 MHz, 1 0 MHz
Converter
D H
/
0 7
-
030
&
2SC1815(Y)
-
S N 7 4 0 0 N
- M
Preset Preset 1 0 M H z
tDH
swi t c h
O.lsec O.1sec
1 MHz order
0 9 Q8e
1 0 0 kHz order
A
Gate
1
I I
T C 4 0 8 t B P TC4081BP
0.5
2 0 m s Gate
EXT VFO data
@
Preset
-
014
TC4011BP
@
Latch
-uy-[-
t