Kenwood TKR-851, Service Manual

Page: 48 / 101

TKR-851
48
Connector Terminal Terminal I/O Terminal function
No. No. Name
19 LD2 O Latch data output for DA converter
20 FWD I RF power down signal input
21 STB O Strobe output for shift register
22 CK O Clock output
23 DT O Data output
24 LDT I Lock detector for TX PLL
25 LDR I Lock detector for RX PLL
26 EPT O Enable output for TX PLL
27 EPR O Enable output for RX PLL
28 CP O Clock output for PLL
29 DP O Data output for PLL
30 SC I Squelch control signal input
31 RSSI I RSSI signal input
32 ASQ I Squelch signal input
33 GND – Ground
34 NC – No connection
35 DET I Detection signal input
36 NC – No connection
CN603 1 SB O Power supply output after power switch
To ACC 2 SB O Power supply output after power switch
15 pin 3 GND – Ground
connector 4 GND – Ground
CN604 1 AO5 O Auxiliary output 5 (FPU selectable)
2 AO4 O Auxiliary output 4 (FPU selectable)
To ACC 3 AO3 O Auxiliary output 3 (FPU selectable)
15 pin 4 SPO O External speaker output
connector 5 SPO O External speaker output
6 AO2 O Auxiliary output 2 (FPU selectable)
7 AO1 O Auxiliary output 1 (FPU selectable)
8 SPI I Internal speaker input
9 RSSI O RSSI signal output
10 RD O RX data output
11 SPG – External speaker ground
12 SPG – External speaker ground
CN605 1 SPO O Internal speaker AF output
2 SPG – Internal speaker ground
CN606 1 NC – No connection
2 NC – No connection
To ACC 3 SPM I Speaker mute signal input
25 pin 4 IO6 I/O Programable I/O 6
D-sub 5 RXG – RX signal ground
connector 6 IO5 I/O Programable I/O 5
7 RA O RX audio output (voice)
8 IO4 I/O Programable I/O 4
9 RD O RX data output (voice & data)
10 IO3 I/O Programable I/O 3
11 TA I TX audio input (voice)
12 IO2 I/O Programable I/O 2
13 TD I TX data input (data or signaling)
Connector Terminal Terminal I/O Terminal function
No. No. Name
14 IO1 I/O Programable I/O 1
15 DG – Control line ground
16 TXG – TX signal ground
17 AI3 I Auxiliary input 3 (FPU selectable)
18 NC – No connection
19 AI2 I Auxiliary input 2 (FPU selectable)
20 SC O Squelch control output
21 AI1 I Auxiliary input 1 (FPU selectable)
22 EPTT I External press-to-talk switch input
23 TXD2 O RS-232C output signal (for FPU)
24 EMON I External monitor switch input
25 RXD2 I RS-232C input signal (for FPU)
26 NC – No connection
27 NC – No connection
28 NC – No connection
29 NC – No connection
30 NC – No connection
RX VCO Unit (X58-4800-10)
Connector Terminal Terminal I/O Terminal function
No. No. Name
CN300 1 FIN I Prescaler RF signal input
2 5C I Common 5V input
3 LDR O Lock detector for RX PLL
4 EPR I Enable input for RX PLL
5 DP I Data input for PLL
6 CP I Clock input for PLL
7 REF I Reference frequency signal input
CN350 1 GND – Ground
2 SRR I Switching signal input for RX VCO
3 8CL I 8V input through the ripple filter
4 CV I RX PLL lock voltage
5 9CL I 9V input through the ripple filter
6 NC – No connection
CN351 1 VO O RX VCO output
2 GND – Ground
TX VCO Unit (X58-4810-10)
Connector Terminal Terminal I/O Terminal function
No. No. Name
CN300 1 FIN I Prescaler RF signal input
2 5C I Common 5V input
3 LDT O Lock detector for TX PLL
4 EPT I Enable input for TX PLL
5 DP I Data input for PLL
6 CP I Clock input for PLL
7 REF I Reference frequency signal input
CN350 1 GND – Ground
2 STT I Switching signal input for TX VCO
TERMINAL FUNCTION