Kenwood TH-22A Service Manual page 39

TH-22A/AT/E
TERMINAL FUNCTION
TX-RX unit (B/4): CONTROL <--> FUNCTION
Connector No. Pin No. Pin name Function
A4 KSINO Key matrix input
KOUT3 Key matrix output, Function switch
KOUT2 Key matrix output, VFO SW
KOUT1 Key matrix output, MR SW
KOUTO Key matrix output, CALL SW
TX-RX unit (B/4): CONTROL <-> KEYPAD
Connector No. Pin No. Pin name Function
CN202 1 KOUTO Key maitrix output
2 KOUTI Key matrix output
3 KOUT2 Key matrix output
4 KOUT3 Key matrix output
5 KSIN2 Key matrix input
6 KSIN3 Key matrix input
7 KSIN4 Key matrix input
8 KSINS5 Key matrix input
TX-RX unit (B/4): CONTROL <-> TSU-8 (option)
Connector No. Pin No. Pin name Function
CN204 1 CK Clock signal
2 DT Serial data signa!
3 ET TSU-8 enable signal
4 NC
5 SPO Tone signal match identification signal
6 E GND
7 3M TSU-8 power supply
8 cl Signalling AF signal
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