Kenwood TM-731A Service Manual page 76

TSU-6 EXTERNAL VIEW
TSU-6 (CTCSS)
TSU-6 Reference Information
MN4094BS (IC 2)
CTCSS TONE MN4094BS Terminals
: ee TX/RX
Switch Switch 65 06 Q1~4, 7,8
OFF TX L H L
RX L H L
OFF
ON TX L L See Table 2.
RX L H L
TX L L
F
ON OFF RX H L .
TX 1 L See Table 2.
ON RX H- L
Q1~4, 7, 8: Tone frequency
setting
Q5: MN6520 (IC1) TX/RX
switching.
| "H"': RX, "LL: TX.
Relationship Between Tone Frequency and the MN6520
Q6: MN6520 (IC1) power
switching.
"H"': OFF, "'L'': ON.
Table 1
Table
(1C1)
TSU-6
PARTS LIST
* New parts
MN6520 Terminals
3
oon'
sc | |
| ss | 2 [| 81
.
. ue
requen
.
Ref
New Parts No.
Description
quency
MN4094 Terminals
No. _ {Parts
(Hz)
7
a1
Q2 Q3 Q4
Q7 (ors)
CTCSS
UNIT (X53-3100-00)
67.0 L
H H H
L 7
C1
CK73FB1H102K
|Chip C 1000pF_ KC
71.9
L H H
H L L
C2 C92-0010-05
Tan.C 6.8 F
6.3WV
74.4 L H
H L H H
C3
C92-0006-05
Tan.C 3.3yF 4.0WV
77.0
L LY Hy
L Ly L
C4,5
CK73EB1E104K
=| Chip C 0. 1pF K
Jo?
' r 4
' i 4
C6
|CK73EB1H223K — | Chip C 0.022uF
K
30 6 ~ TTY
7 Ct
C7 CK73EB1E104K
=| Chip C
0.1 4F K
a
,
C8,9
CC73FCH1H150J | Chip C
15pF sd
85.4
L. H L
H_ | H
C10
CK73FB1H102K
=| Chip C 1000pF
K
88.5 _t
H L H
H L
C11 CK73EB1E104K
=| Chip C
O.1pF K
91.5 L
H L H
L H
C12
C92-0507-05
Chip tan. C4. 7pF 6.3WV
94.8
uy. 4 H
L L H
_
103.5 H
H L H H
H
E40-5121-05 Pin ass'y socket (10P)
107.2 H
H L H H
L
x1
L77-1313-05
X'tal 4.194304 MHz
110.9
H H L
H L H
114.8
H H L
H L L
R1~10
RK73FB2A000J
Chip R
118.8
H H L
L H H
R12~14
RK73FB2AO00J
|Chip R
123.0
7 H L
a" 7 [
|
127.3 H H
L L L
H
VR1
R12-3460-05
Semi-fixed R- 33 kQ
7
131.8 H H L L L L
Q1 DTC144TK
DIGITAL TR
136.5 H L
H HoT
H
Q2
DTA114EK
DIGITAL TR
141.3
H L
H H
H L
Q3
2S8C2712(GR)
Chip TR
146.2
H L H
H L | H
151.4 H
L H H
L L
IC1
MN6520 IC
1567
r L A
7 4 4
IC2 MN4094BS IC
162.2
H L H
L H L
. .
167.9
H L
H L L
H
TSU-6 Frequency Fine-Adjustment
|
738 7
1 r 1
7 1
The tone frequency can be fine-adjusted in 0.5 % steps, in
1799 7
L 1 4
7 7
the range from O to + 1.5%. For the fine-adjustment, con-
nect T1 (pin 10) and T2 (pin 9) of 101 as indicated in Tab
1862
Hof bop
t | AA
|
I
l e
3
pins P
:
3 192.8
H L
L | oH L | H
;
T1
T2
203.5
H L L
H L L
0%
Xx x
7
210.7 H L
L L H
H
+0.5% 'on
x
218.1
H L L L
H L
+1.5% O
5
233.6
H L L L
L L
O: GND, X : OPEN
241.8
L H H
H H H
250.3
L H
H H H
L
8] Table 3
2
TSU-6 PC BOARD VIEW
TSU-6 (CTCSS UNIT)
[Component side view]
TSU-6 SCHEMATIC DIAGRAM
CTCSS UNIT(X52-3100-00)
—_
—- NW SUDAN OVO
[Foil side view]
: Foil side pattern
a
IC2 : MN4094BS
4
Y
Se
yy
|
cio .0o1
Y-
Ri ik
yw -*
'N
{5P
c9
R2 10K R6 2.2K
T a S AW e e —AW\~ Q j DTC144TK
© +)
m | x +; > |x
,
Studd le
ode t $9
x Q2 : DTA114EK
7 oJ o>)
one Yo
=
Q3 : 28C2712(GR)
o)
5
a =
. Se] aw
JR ;
.
7 7 7 7 oa
+{ > | =
A \ ie
Y +
N
ic2 ons" |x
~galicleelsle y=, 7 "
m
Jv ge
1 nel
hat hae hee Sas!
LS)
m cs ub OwrF W ~~ he IK
yo
2 e6u5H !5S5R8
{
> a o 32 t>fO> 2350 10 > STROBE VCC
4nc-" S @ 2
Tie »—SIDATA
OUT ENA
224 DET OUT 24 T2{2 »>—24 cock Q5
- 244 4 |g 4
25 RX OUT(S)
S6 <
<t Q1 Q6
cS
Sei Lim ATT
Ss i
«o>
07
. a7 TX OUT $4 = ~t = Q3 Q8
m3 Cé og] NC iC 1 S3 4 Q4 Qs
Ly " b/s LIM IN (+) $2 ~« Bh vss Qs'
&
022 p> Sa{RX IN
ajo
,
= | 34 T-TONE
Nel
= 324N
=
NCP
"
Rid 1M S)
4T-LPF
_ <x
AA a.
_
VV
x = Dre oa
N WJ
O on
OmO0
2
O TIM 7 arnn a
3). Lee
}
~
4H 2 Bs ess 818 S15]9
x =m
Nw ~
ow
©
x4
4.194304
7 eae
{0
Components side pattern
—
IC 1° MN6520