Kenwood TS-2000, Service Manual

Page: 41 / 171

41
TS-2000/X
Serial-Parallel : BU2099FV
(Final unit IC205, Control unit IC530,
Display unit IC4, TX-RX 1 unit IC5,16,17,
TX-RX 2 unit IC2)
■
Block diagram
LPF
1
2
3
4
5
6
7
8
9
10 11
12
13
14
15
16
17
18
19
20 VDD
Control
circuit
OE
SO
Q11
Q10
Q9
Q8
Q7
Q6
Q5
Q4
Q3
Q2
Q1
Q0
LCK
CLOCK
DATA
NC
VSS
Output buffer (Open drain)
12 bit storage register
12 bit shift register
D flip-flop : TC7WH74FU (Filter unit IC2)
■
Logic diagram
Q
S
C
D
R
Q
(5)
(3)
PR
CK
D
CLR
(7)
(1)
(2)
(6)
■
Truth table
Input Output Function
CLR PR D CK Q Q
L H X X L H Clear
H L X X H L Preset
L L X X H H –
H H L
↑
L H –
H H H
↑
H L –
H H X
↓
Qn Qn No change
X : Don‘t care
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Pin description
No. Name I/O Description
1 Vss – GND
2 NC – NC
3 DATA I Serial data input.
4 CLOCK I Shift register shift clock
(rising edge trigger).
5 LCK I Storage register latch clock
(rising edge trigger).
6~17 Q0~Q11 O Paralle data output
(Qx) (Nch open drain FET).
18 SO O Serial data output.
19 OE I Output enable control input.
20 VDD – Power
Latch data L H
Output FET On Off
Analog Switch : TC74HC4052AFT (Control unit IC6)
Analog Switch : TC74HC4053AFT (Control unit IC5)
Mixer : TC74HC4053AFT (TX-RX 1 unit IC3)
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Logic diagram
TC74HC4052AFT TC74HC4053AFT
0
1
G4
A
B
INH
X-COM
Y-COM
0X
1X
2X
3X
0Y
1Y
2Y
3Y
(10)
(12)
(14)
(15)
(11)
(1)
(5)
(2)
(4)
(9)
(6)
(13)
(3)
MUXDMUX
0...3
0
1
2
3
4 x
3
0
G2
A
INH
Z-COM
X-COM
0X
0Y
1Y
0Z
1Z
(11) (12)
(2)
(1)
(5)
(3)
(6)
(4)
(14)
MUXDMUX
2 x 0
2 x 1
0,1
0
1 1X
(13)
B
(10)
Y-COM
(15)
C
(9)
■
Truth table
Control inputs “ON” channel
Inhibit C* B A HC4052A HC4053A
L L L L 0X, 0Y 0X, 0Y, 0Z
L L L H 1X, 1Y 1X, 0Y, 0Z
L L H L 2X, 2Y 0X, 1Y, 0Z
L L H H 3X, 3Y 1X, 1Y, 0Z
L H L L – – 0X, 0Y, 1Z
L H L H – – 1X, 0Y, 1Z
L H H L – – 0X, 1Y, 1Z
L H H H – – 1X, 1Y, 1Z
H X X X None None
X : Don‘t care, * : Except HC4052A
SEMICONDUCTOR DATA