Final Unit (X57-5610-Xx) (C/3) : Tk-790/(B); Tx-Rx Unit (X57-5610-Xx) (A/3) - Kenwood TK-790 Service Manual

Connector Terminal Terminal
I/O
No. No. Name
14 AO1 O
15 AO2 O
16 AO3 O
17 TXD2 O
18 AO4 O
19 RXD2 I
20 SQ O
21 TXS O
22 SPM I
23 MCM I
24 ME –
25 MI/DI I
26~30 – –
CN506 1 IGN I
To Acc 2 E –
9 pin 3 HR1 O
connector 4 HR2 O
5 OS1 O
6 OS2 O
7 ES2 O
8 ES1 O
9 RS1 I
CN507 1 SQ O
To
ANI 2 EMG O
board 3 EPT I
4 IO I/O
5 SEL –
6 AS2 I
7 MCM I
8 TON I
9 TCN I
10 DTI I
CN508 1 MCI I
To 2 MCO O
voice 3 DEI I
scrambler 4 AC O
5 BC1 O
6 BC2 O
7 BC3 O
8 BC4 O
9 TXD2 O
10 RXD2 I
11 DEO O
12 PTO O
13 8C O
14 E –

FINAL UNIT (X57-5610-XX) (C/3) : TK-790/(B)

CN1 1 DO I
To
TX-RX
unit
CN2 1 +B I
TERMINAL FUNCTION
Terminal Function
Auxiliary output 1 (FPU selectale).
Auxiliary output 2 (FPU selectale).
Auxiliary output 3 (FPU selectale).
Serial data output.
Auxiliary output 4 (FPU selectale).
Serial data input.
Squelch signal output.
"H" : Busy, "L" : Not busy
TX sense signal output.
"H" : TX, "L" : Another
Speaker mute signal input.
"H" : Mute on
MIC mute signal input. "H" : Mute on
MIC earth.
Mic/Data signal input 1. (Default : DI)
Non connection.
Ignition sense input.
Earth.
Horn alert signal output 1.
Horn alert signal output 2.
BTL output for external speaker B (PA).
BTL output for external speaker B (PA).
BTL output for external speaker A.
BTL output for external speaker A.
Remote speaker switch.
Squelch signal output.
"H" : Busy, "L" : No signal
Emergency signal output.
External PTT signal input.
Auxiliary input/output.
Non connection.
Audio mute input.
"HiZ" : No change, "L" : Mute
MIC mute input.
"HiZ" : No change, "L" : Mute
Sidetone input.
Speaker mute input.
"HiZ" : No change, "L" : Unmute
Data input.
MIC signal input.
MIC signal output.
Detection signal input.
Audio control signal output.
"H" : OPT SW off, "L" : On
Scramble code output.
Scramble code output.
Scramble code output.
Scramble code output.
TX data output 2.
RX data input 2.
Detection signal output.
PTT signal output.
Common 8V output.
Earth.
Transmission drive input.
Coaxial connector.
Power supply input (13.6V± 15%).
TK-790/
Connector Terminal Terminal
I/O
No. No. Name
CN3 1 RA O
To
TX-RX
unit
W1 1 E –
To 2 +B O
Control 3 +B O
unit
W2 1 DB O
To
TX-RX 2 E –
unit 3 8T I
4 PC I
DISPLAY UNIT (X54-3190-20) : KCH-10
(X54-3200-20) : KCH-11
CN1 1 ME –
To 2 MIC O
Control 3 E –
unit 4 RST I
5 1/2 I
6 TRD I/O
7 PS O
8 IGN O
9 SB I
10 RS1 I
11 RS2 I
CN2 1 RS1 O
To 2 RS2 O
Remote
speaker
CN3 1 IGN I
To Acc 2 SB O
12 pin
connector 3 E –
4 MIC I
5 ME –
6 AI1 I
7 AI2 I
8 AO1 O
9 AO2 O
J1 1 SB O
(MIC
jack) 2 HK I
3 ME –
4 MIC I
5 E –
6 TRD I/O
7 NC –
8 DM I/O
9 BLC O
10 PTT I
11 NC –
12 NC –
( B ) /H (
Terminal Function
Receiver signal output.
Coaxial connector.
Earth.
Power supply output (13.6V± 15%).
Power supply output (13.6V± 15%).
Transmission drive control
voltage output (APC).
Earth
8V input during transmission.
TX power control signal input.
MIC earth.
MIC signal output.
Earth.
RESET signal input.
Remote head 1/2 signal input.
"L" : Head 1, "H" : Head 2
TX data output/RX data input.
Power switch control signal output.
Ignition sense output.
Power input after power switch
(13.6V or 13.4V± 15%).
Remote speaker input.
Remote speaker input.
Remote speaker output.
Remote speaker output.
Ignition sense input.
Power output after power switch
(13.6V or 13.4V± 15%).
Earth.
MIC signal input.
MIC earth.
Auxiliary input 1 (FPU selectable).
Auxiliary input 2 (FPU selectable).
Auxiliary output 1 (FPU selectable).
Auxiliary output 2 (FPU selectable).
Power output after power switch
(13.6V or 13.4V± 15%)
Hook signal input.
"L" : On hook, "H" : Off hook
MIC eearth.
MIC signal input.
Earth.
TX data output/RX data input.
Not used.
Serial data input/output for keypad MIC.
MIC backlight control signal output.
"H" : On, "L" : Off
PTT signal input.
"L" : TX, "OPEN" : RX
Not used.
Not used.
B )
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