Kenwood TS-2000 Service Manual page 128

CN No. Pin No. Name I/O
19 GND - GND
20 AMU I Audio Mute, active "H" to mute SP1/
SP2 output
21 STS I Start switch, active "H". When START
is "H", CPU gets this signal, then
send back STS to this unit to turn ON
IC10, 11, 604.
22 DREN I Enable for DRU-3A Voice recording unit
23 EOM O End of message from DRU-3A "H" for end
24 GND - GND
25 DRO O Audio out from DRU-3A
26 GND - GND
27 DRM I Audio in for DRU-3A
28 GND - GND
29 VCS I VS3 voice synthesizer start signal
30 RST I VS-3 reset signal
31 NAR I "H" for data input enable to VS-3
32 GND - GND
33 VO O VS-3 audio output
34 GND - GND
35 12OP O "H" when 1.2GHz unit installed
36 PRGS O "L" for MAIN CPU write
CN25 1 BATT O Back up battery output for MODEM
2 AGCR I AGC reference voltage
3 MRBK I Main receive blanking control.
"H" for blanking
4 MSM O Main S-meter signal output
5 MSQ O Main SQ signal output (detected
noise ; DC)
6 HTXC I HF~50MHz TX control,
Active "H" to enable HF-50MHz TX
7 HRXC I HF~50MHz RX control,
Active "H" to enable HF-50MHz RX
8 VTXC I VHF TX control,
Active "H" to enable 144MHz TX
9 VRXC I VHF RX control,
Active "H" to enable 144MHz RX
10 UTXC I UHF TX control,
Active "H" to enable 430MHz TX
11 URXC I UHF RX control,
Active "H" to enable 430MHz RX
12 12TXC I 1.2GHz TX control,
Active "H" to enable 1.2GHz TX
13 12RXC I 1.2GHz RX control,
Active "H" to enable 1.2GHz RX
TERMINAL FUNCTION
Function CN No. Pin No. Name I/O
CN26
TS-2000/X
14 VSFM O Forward wave detection voltage
of HF-50MHz VSWR, amplified by
IC19
15 VSRM O Reflected wave detection voltage
of HF-50MHz VSWR, amplified by
IC19
16 ALCM O ALC meter voltage
17 DATA I Serial data
18 CLK I Serial clock
19 IEN1 I IF enable 1 (IC5)
20 IEN2 I IF enable 2 (IC16)
21 IEN3 I IF enable 3 (IC17)
22 IEN4 I IF enable 4 (IC14)
23 IEN5 I IF enable 5 (IC15)
24 DEN4 I DDS enable 4 (IC602)
25 DEN5 I DDS enable 5 (IC603)
26 DEN6 I DDS enable 6 (IC601)
27 MALT O Main auto lock tune (kind of auto
frequency control), main discriminator
DC output
28 CKY I CW keying, Active "H" to transmit
actual wave of all emission
29 PCK I PLL clock (1.2GHz unit)
30 PDA I PLL data (1.2GHz unit)
31 12EN1 I Enable 1 for 1.2GHz unit
32 12EN2 I Enable 2 for 1.2GHz unit
33 12UL O PLL unlock detect, "L" when 1.2GHz
PLL is unlocked
34 12THV - Reserved
35 12EN3 I Enable 3 for 1.2GHz unit
36 GND - GND
1 GND - GND
2 43VSF I Forward wave detection voltage
of 430MHz VSWR
3 14S O 14V when the power switch on
4 14S O 14V when the power switch on
5 43VSR I Reflected wave detection voltage
of 430MHz VSW
6 UTXB O 430MHz TXB approx. 8V
7 VTXB O 144MHz TXB approx. 8V
8 AGC O AGC
9 5C O Common 5V
10 TBPF O Control voltage for variable capacitor
of TX BPF
Function
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