Control Unit (X57-5610-Xx) (B/3); Terminal Function - Kenwood TK-790 Service Manual

TK-790/ ( B
Connector Terminal Terminal
No. No. Name
FINAL UNIT (X45-3560-10) : TK-790H(B)
CN1 1 DO
To
TX-RX
unit
CN2 1 RA
To
TX-RX
unit
CN3 1 +B
CN4 1 E
W4 1 E
To 2 +B
Control 3 +B
unit
W5 1 DB
To
TX-RX 2 E
unit 3 8R
4 8T
5 PC
TX-RX UNIT (X57-5610-XX) (A/3)
CN104 1 RA
To
Final
unit
CN201 1 PC
To 2 8T
Final 3 8R
unit 4 E
5 DB
CN202 1 NC
To 2 UL
Control
unit 3 EP
4 CP
5 MO
6 MB
7 SB
8 DT
9 ES
10 CK
11 KEY
12 8C
13 E
14 DET
15 SQL
16 RSI
17 TV
18 PC
CN203 1 DO
To
Final
unit
74
) /H ( B )

TERMINAL FUNCTION

I/O Terminal Function
I Transmission drive input.
Coaxial connector.
O Receiver signal output.
Coaxial connector.
I Power supply input (13.4V±15%).
– Earth.
– Earth.
O Power supply output (13.4V±15%).
O Power supply output (13.4V±15%).
O Transmission drive control
voltage output (APC).
– Earth.
I 8V input during reception.
I 8V input during transmission.
I TX power control signal input.
I Receiver signal input.
Coaxial connector.
O TX power control signal output.
O 8V output during transmissioin.
O 8V output during reception.
– Earth.
I Tranmission drive control voltage
input (APC).
– Not used.
O Lock detect output for PLL.
"H" : Lock, "L" : Unlock
I ENABLE input for PLL.
I CLOCK input for PLL.
I Modulation signal input for VCO.
I Modulation and frequency control
signal input for VCXO.
I Power output after power switch
(13.6V or 13.4V± 15%).
I DATA input.
I ENABLE input for shift register.
I CLOCK input for shift register.
I KEY signal input. "H" : TX
I Common 8V (8V±5%).
– Earth.
O Detection signal output.
O Squelch signal output.
O RSSI signal output.
I Tuning voltage signal input for RX BPF.
I TX power control signal input.
O Transmission drive output.
Coaxial connector.
Connector Terminal Terminal
I/O
No. No. Name

CONTROL UNIT (X57-5610-XX) (B/3)

W501 1 RS2 O
To 2 RS1 O
Display 3 SB O
unit
4 IGN I
5 PS I
6 TRD I/O
7 1/2 O
8 RST O
9 E –
10 MIC I
11 ME –
CN501 1 +B I
To 2 +B I
Final 3 E –
unit
CN502 1 PC O
To 2 TV O
TX-RX 3 RSI I
unit 4 SQL I
5 DET I
6 E –
7 8C O
8 KEY O
9 CK O
10 ES O
11 DT O
12 SB O
13 MB O
14 MO O
15 CP O
16 EP O
17 UL I
18 NC –
CN504 1 AFO O
To 2 DE3 I/O
Control 3 E –
cable 4 EI O
(Remote 5 CK O
kit) 6 DT O
7 RST I/O
8 5C O
9 PSC I/O
10 CS O
CN505 1 RSI O
To Acc 2 NC (SB) O
25 pin 3 AI1 I
D-sub 4 RSV1 O
connector 5 AI2 I
6 RSV2 I
7 AI3 I
8 AFO O
9 AI4 I
10 E –
11 AI5 I
12 DEO O
13 E –
Terminal Function
Output for remote speaker.
Output for remote speaker.
Power output after power switch
(13.6V or 13.4V± 15%).
Ignition input.
Power swith control signal input.
TX data output/RX data input.
Remote head 1 signal output.
RESET signal output.
Earth.
MIC signal input.
MIC earth.
Power supply input (13.6V or 13.4V± 15%).
Power supply input (13.6V or 13.4V± 15%).
Earth.
TX power control signal output.
Tuning voltage signal output for RX BPF.
RSSI signal input.
Squelch signal input.
Detection signal input.
Earth
Common 8V (8V±5%).
KEY signal output. "H" : TX
CLOCK output for shift register.
ENABLE output for shift register.
DATA output.
Power output after power switch
(13.6V or 13.4V± 15%).
Modulation and frequency control
signal output for VCXO.
Modulation signal output for VCO.
CLOCK output for PLL.
ENABLE output for PLL.
Lock detect input for PLL.
"H" : Lock, "L" : Unlock.
Not used.
RX audio signal output for head 2.
Detection signal input from Radio 2.
Earth
ENABLE output for shift register.
CLOCK output for shift register.
DATA output for shift register.
RESET signal output for Radio 2.
Common 5V (5V±5%).
Power switch control signal
input/output.
Chip select output for D/A converter.
RSSI signal output.
Non connection.
Auxiliary input 1 (FPU selectable).
Reserved
Auxiliary input 2 (FPU selectable).
Reserved.
Auxiliary input 3 (FPU selectable).
RX audio signal output.
Auxiliary input 4 (FPU selectable).
Earth.
Auxiliary input 5 (FPU selectable).
Detector signal output.
Earth.