Kenwood NXR-5700, Service Manual

Page: 31 / 122

(No.RA033<Rev.001>)1-31
22 I2CCK2 O I2C clock2
23 /EWP O EEPROM write control signal
24 33D O 3.3V power supply
25 ASTSW_TX O TX PLL assist control signal
26 8TC O 8V power supply control
27 TX_CV I TX VCO lock voltage
28 TXASSIST O TX PLL assist voltage
29 SPSI1 I SPI1 data in
30 GND - Ground
31 SPSCLK1 O SPI1 clock
32 /LDAC I Simultaneous update of DAC outputs
33 SPSD1 O SPI1 data out
34 RF_B_ON O RF +B switch control signal
35 GND - Ground
36 MOD O Audio signal for TX modulation
CN102 (To Tx Unit XC1-065 A/3 CN405)
1 CONT_REF I 19.2MHz Reference Signal
2 GND - Ground
CN103 (To Rx Unit XC1-066 CN641)
1 IF_SIG I 450kHz IF Signal
2 GND - Ground
CN310 (To Tx Unit XC1-065 B/3 CN902)
1 50MPU O 5.0V power supply
2 50MPU O 5.0V power supply
3 50MPU O 5.0V power supply
4 50MPU O 5.0V power supply
5 GUARD - Guard
6 GND - Ground
7 K5 O Key scan output
8 K4 O Key scan output
9 33MPU O 3.3V power supply
10 33MPU O 3.3V power supply
11 K3 I Key scan input
12 K2 I Key scan input
13 K1 I Key scan input
14 GND - Ground
15 /LED_LAT O LED data latch signal
16 GND - Ground
17 LED_DAT O LED data out
18 GND - Ground
19 LED_CLK O LED clock out
20 GND - Ground
21 /LED_oE O LED output enable signal
22 GND - Ground
23 LED_PWM O LED brightness adjustment control
signal
Pin
No. Name I/O Function
24 GND - Ground
25 /HK I Hook detection input
26 GND - Ground
27 /PTT I PTT input
28 33MPU O 3.3V power supply
29 VoLUME_iN I Volume control input for AF signal
30 GND - Ground
31 GUARD - Guard
32 +B O Power supply ouput
33 GUARD - Guard
34 MIG - MIC Ground
35 MIC I MIC signal
36 33AUD O 3.3V power supply
CN342 (To TEST/SPKR 15pin Connector)
1 AO5 O Auxiliary output5
2 AO4 O Auxiliary output4
3 AO3 O Auxiliary output3
4 SPO O Speaker AF output
5 AO2 O Auxiliary output2
6 SPO O Speaker AF output
7 AO1 O Auxiliary output1
8 SPI I Internal speaker AF input
9 RSSI O RSSI voltage
10 RD O RX data output
11 GND - Ground
12 SPG - Speaker Ground
13 GND - Ground
14 SPG - Speaker Ground
15 NC - No connection
16 NC - No connection
17 +B O 13.6V power supply
18 NC - No connection
19 +B O 13.6V power supply
20 NC - No connection
CN343 (To Internal Speaker)
1 SPO O Internal speaker AF output
2 SPG - Speaker Ground
CN555 (To Control I/O 25pin D-sub Connector)
1 NC - No connection
2 NC - No connection
3 NC - No connection
4 NC
(RSSI/Reset) - No connection (RSSI)
5 BER_CLK_D
25 O Bit error rate clock
6 RXD0_D25 I UART RX data
Pin
No. Name I/O Function