Kenwood TKR-740, Руководство по обслуживанию

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TKR-740
64
TERMINAL FUNCTION
CONTROL UNIT (X53-3882-71)
1 RA RX Audio (filtered signal) I
2 RXG RX Audio ground -
3 DET Detector audio I
4 DEG Detector audio ground -
5 SC Noise squelch control I
6 RSSI RX signal strength indicator I
7 CK Common clock O
8 DT Common data O
9 ESR Shift register strobe O
10 EVR Electronic volume strobe O
11 SCL RX EEPROM serial clock O
12 SDA RX EEPROM serial data I/O
13 DP PLL data signal O
14 CP PLL clock signal O
15 EPR RX main PLL strobe signal O
16 LDR RX PLL lock detector I
17 GND Ground -
18 CVR RX main PLL lock voltage I
19 NC No connection -
20 NC No connection -
21 B Pow er supply (Vcc) O
22 B Pow er supply (Vcc) O
23 B Pow er supply (Vcc) O
24 NC No connection -
25 NC No connection -
26 NC No connection
1 M OD M odulation signal O
2 TO Signalling signal O
3 M IG M icrophone ground -
4 EVT TX electronic volume enable signal O
5 EST TX shift register enable signal O
6 DT Data signal for IC3 & IC4 O
7 CK Clock signal for IC3 & IC4 O
8 NC No connection -
9 NC No connection -
10 SDA RX EEPROM serial data O
11 SCL RX EEPROM serial clock I/O
12 LDT TX main PLL lock detector I
13 PRT High temperature detect I
14 CP TX both PLL clock signal O
15 NC No connection -
16 DP TX both PLL data signal O
17 EXR Exit reference detector I
18 CVT TX main PLL lock voltage I
19 REV Reverse TX pow er detector I
20 FWD Forw ard TX pow er detector I
21 GND Ground -
22 PAG Digital pager signal O
23 B Pow er supply (Vcc) I
24 B Pow er supply (Vcc) I
25 B Pow er supply (Vcc) I
26 PAB Pow er supply for AF PA IC I
Terminal
No.
Terminal
name
Terminal function I/ O
CN1
Terminal
No.
Terminal
name
Terminal function I/ O
CN2
Terminal
No.
Terminal
name
Terminal function I/ O
CN3
1 SPI Local speaker input O
2 SPG Local speaker ground -
3 VLO AF volume control output I
4 VLI AF volume control input O
5 GND Ground -
6 BLT M ic connector J700 (1pin) I
7 8C 8V constant voltage O
8 HOK Hook-sw itch I
9 PTT Press-to-talk-sw itch I
10 EXR Exit reference indicator O
11 SW1 Programable sw itch S705 I
12 SW2 Programable sw itch S704 I
13 B Pow er supply (Vcc) O
14 B Pow er supply (Vcc) O
15 SW3 Programable sw itch S703 I
16 SW4 Programable sw itch S702 I
17 TEST Test sw itch I
18 SW5 Programable sw itch S701 I
19 SW6 Programable sw itch S700 I
0 EN7 Shift register enable signal O
21 M DAT M ic connector J700 (8pin) I
22 DT Serial data for IC703 O
23 CK Common serial clock O
24 GND Ground -
25 M I M icrophone signal I
26 M IG M icrophone ground -