Kenwood TS-2000 Service Manual page 40

TS-2000/X
TX-RX 2 unit (X57-606)
Pin No. Port name
IC2 : BU2099FV
6 Q0 AMSW
7 Q1 W/NSW
8 Q2 R43S
9 Q3 R14S
10 Q4 8RS1
11 Q5 8RS1/2
12 Q6 UPRE
13 Q7 VPRE
14 Q8 IMS
15 Q9 R50S
16 Q10 NC
17 Q11 R20S
IC404 : BU4094BCFV
4 Q1 HF VCO1
5 Q2 HF VCO2
6 Q3 HF VCO3
7 Q4 USW
14 Q5 VSW
13 Q6 BSW2
12 Q7 BSW1
11 Q8 VPRE
Conversion Between 5V and 3V :
TC74LVX4245FS (Control unit IC9~11)
Block diagram
VCCA
DIR
OE
A1
A8 Same as above block
40
SEMICONDUCTOR DATA
Pin name Function
AM power switch
Wide/Narrow selection switch
Front end selection switch for sub UHF
SUB VHF power switch
SLO1 amplifier switch
SLO1 prescaler (1/2) switch
UHF pre-amplifier switch
VHF pre-amplifier switch
VHF pre-amplifier through switch
Front end selection switch for sub UHF
Front end selection switch for sub VHF
VCO1 selection for HF band
VCO2 selection for HF band
VCO3 selection for HF band
VCO selection for VHF band
VCO selection for UHF band
VCO selection for sub VHF band
VCO selection for sub UHF band
VCO oscillator range selection for sub band
VCCB
Logic
Level
Converter
Active level
L
L
L
L
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H/L
Logic symbol
OE
DIR
A1
A2
A3
A4
B1
A5
A6
A7
B8
A8
Condition
When the sub AM is selected for receiving
When the sub FM narrow is selected for receiving
When the sub UHF is selected for receiving
When the sub VHF is selected for receiving
When the sub VHF is selected for receiving
When the sub UHF is selected for receiving
When the UHF receiver and pre-amplifier is off
When the VHF receiver and pre-amplifier is off
When the sub UHF is selected for receiving
When the sub VHF is selected for receiving
When the frequency range of
0.03~17.0MHz is selected
When the frequency range of
17.0~37.0MHz is selected
When the frequency range of
37.0~60.0MHz is selected
When the main band VHF is selected
When the main band UHF is selected
When the sub band RX VHF is selected
When the sub band RX UHF is selected
When the sub band is selected for receiving
(22)
G3
3EN1 (BA)
(2)
3EN2 (AB)
(21)
(3)
1 B1
2
(20)
(4)
B2
(19)
(5)
B3
(6) (18)
B4
(17)
(7)
B5
(16)
(8)
B6
(15)
(9)
B7
(10) (14)
B8