Kenwood TKR-851 Service Manual page 47

Connector Terminal Terminal I/O
No. No. Name
10 EPR I
11 EPT I
12 LDR O Lock detector for RX PLL
13 LDT O Lock detector for TX PLL
14 DT I
15 CK I
16 STB I
17 FWD O RF power down signal output
18 LD2 I
19 BUP O Backup signal output
20 PSW I
21 TMP O High temperature detector signal
22 SOE I
23 GND –
24 MB I
25 MO I
26 GND –
27 GND –
28 QS I
29 NC –
30 SB O Power supply output after power switch
31 SB O Power supply output after power switch
32 SB O Power supply output after power switch
33 SB O Power supply output after power switch
34 NC –
35 8C O Common 8V output
36 8C O Common 8V output
CN15 1 E –
2 B I
3 B I
CN16 1 GND –
2 NC –
To X45 3 8T O 8V output during transmission
final 4 PC O TX power control signal output
unit 5 FAS O Fan control signal output
6 PDT I
7 BUT I
8 TMP I
CN18 1 RX IN I
CN19 1 DO O Transmission signal output (Coaxial)
TX-RX Unit (X57-6962-70) (B/2) : Control Section
Connector Terminal Terminal I/O
No. No. Name
CN600 1 SB O Power supply output after power switch
To X54 2 SB O Power supply output after power switch
(B/2) 3 GND –
TERMINAL FUNCTION
Terminal function
Enable input for RX PLL
Enable input for TX PLL
Data input
Clock input
Strobe input for shift register
Latch data input for DA converter
Power switch input
output for fan action
Output enable for shift register
Ground
Modulation signal input for VCXO
Modulation signal input for VCO
Ground
Ground
Data
No connection
No connection
Earth
Power supply input
Power supply input
Ground
No connection
RF power down signal input
Main DC/BACKUP status input
High temperature detector signal
input for fan action
Receive signal input (Coaxial)
Terminal function
Ground
Connector Terminal Terminal I/O
No. No. Name
4 NC –
display 5 DAT O Serial data output
unit 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 TXO O MIC signal output to the board
2 TXI I
To 3 RXO O RX audio signal output to the board
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 RXI I
12 PTO O PTT signal output
13 NC O No connection
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 QS O Data
10 GND –
11 GND –
12 MO O Modulation signal output for VCO
13 MB O Modulation signal output for VCXO
14 GND –
15 SOE O Output enable for shift register
16 TMP I
17 PSW O Power switch output
18 BUP I
TKR-851
Terminal function
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 from the board
PTT signal input
RX audio signal input from the board
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
Ground
Ground
Ground
High temperature detector signal input
Backup signal input
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