Kenwood TK-90, Service Manual

Page: 91 / 142

TK-90
91
Pin No. Name I/O Function
4 NC -
5 TXD1 O Data output
6 RXD1 I Data input
7 RTK I RTTY control
8 DPTT I Data PTT signal input
9 GND - GND
10 AUX1 I/O
11 AUX2 I/O
12 AUX3 I/O
CN10 (for KCT-39)
1 IGN I Ignition sense signal input H: Power on
2 DI I Modulation signal input (TX by DPTT)
3 DEO O Detect signal output
4~11 NC -
CN11 (for VGS-1)
1 VBSY I VGS-1 busy signal
2 VPLY I VGS-1 play signal
3 SO - NC
4 DATA O Data signal output for VGS-1
5 CLK - CLK for VGS-1
6 VEN - Enable signal for VGS-1
7 USEL - NC
8 VRST O VGS-1 reset signal
9 DGND - DGND
10 AGND - GND
11 VAI I VGS-1 audio input
12 VAO O VGS-1 audio output
13 AGND - GND
14 5D O Switched 5V for VGS-1
15~26 NC -
CN12 (to Final unit)
1 8D I 8V AVR output for digital circuit
2 8A I 8V AVR output for analogue circuit
3 14S I Switched 13.6V
4 14V I 13.6V
5 14AF I Switched 13.6V for audio amplifier
6 14AG I GND for audio amplifier
7 GND - GND
8 GND - GND
CN13 (to Option)
1 TXAO O TX audio signal output (TXI)
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