Kenwood TKR-750 Service Manual page 46

TKR-750
Connector Terminal Terminal I/O
No. No. Name
10 EPR
11 EPT
12 LDR
13 LDT
14 DT
15 CK
16 STB4
17 FWD
18 LD2
19 BUP
20 PSW
21 TEMP
22 SOE
23 GND
24 MB
25 MO
26 GND
27 GND
28 NC
29 NC
30 SB
31 SB
32 SB
33 SB
34 NC
35 8C
36 8C
CN15 1 E
2 B
3 B
CN16 1 E
2 RSW
To X45 3 8T
final 4 PC
unit 5 FAS
6 PDT
7 BAT
8 VTH
CN18 1 RX IN
CN19 1 DO
48
TERMINAL FUNCTION
Terminal function
I Enable input for RX PLL
I Enable input for TX PLL
O Lock detector for RX PLL
O Lock detector for TX PLL
I Data input
I Clock input
I Strobe input for shift register
O RF power down signal output
I Latch data input for DA converter
O Backup signal output
I Power switch input
O High temperature detector signal
output
I Output enable for shift register
– Ground
I Modulation signal input for VCXO
I Modulation signal input for VCO
– Ground
– Ground
– No connection
– No connection
O Power supply output after power
switch
O Power supply output after power
switch
O Power supply output after power
switch
O Power supply output after power
switch
– No connection
O Common 8V output
O Common 8V output
– Earth
I Power supply input
I Power supply input
– Earth
– Reserved
O 8V output during transmission
O TX power control signal output
O Fan control signal output
I RF power down signal input
I Main DC/BACKUP status input
I High temperature detector signal
input
I Receive signal input (Coaxial)
O Transmission signal output (Coaxial)
TX-RX Unit (X57-6260-XX) (B/2) : Control Section
Connector Terminal Terminal I/O
No. No. Name
CN600 1 SB O Power supply output after power
To X54 2 SB O Power supply output after power
(B/2)
display 3 GND –
unit 4 NC –
5 DAT O Serial data output
6 PSW I
7 STB1 O Strobe data for shift register
8 CLK O Clock data output
9 SOE O Output enable for shift register
10 TXD1 I/O PTT input/TXD output
11 K1 I
12 RXD1 I
13 K2 I
14 K3 I
15 K4 O KEY output 4
16 K5 O KEY output 5
17 VLI I
18 5C O Common 5V output
19 MIG –
20 MIC I
CN601 1 TXI I
2 TXO O MIC signal output
To 3 RXI I
optional 4 AC O Audio control signal output
board 5 BC1 O Scramble code output.
6 BC2 O Scramble code output.
7 BC3 O Scramble code output.
8 BC4 O Scramble code output.
9 PTI I
10 CLRC O Clear code for scramble
11 RXO O RX audio signal output
12 PTO O PTT signal output
13 5C O Common 5V output
14 GND –
CN602 1 8C I
2 8C I
To X57 3 NC –
(A/2) 4 SB I
TX-RX 5 SB I
unit 6 SB I
7 SB I
8 NC –
9 NC –
10 GND –
11 GND –
12 MO O Modulation signal output for VCO
13 MB O Modulation signal output for VCXO
Terminal function
switch
switch
Ground
No Connection
Power switch input
KEY input 1
Hook detection input/RXD input
KEY input 2
KEY input 3
Volume control input for AF signal.
Mic ground
MIC signal input
MIC signal input
RX audio signal input
PTT signal input
Ground
Common 8V input
Common 8V input
No connection
Power supply input after power switch
Power supply input after power switch
Power supply input after power switch
Power supply input after power switch
No connection
No connection
Ground
Ground