Kenwood NXR-700 Service Manual page 29

Control Unit (X53-4132-71)
Pin No. Name I/O
CN1 (To X53-414 CN401)
1 PTT_TXD_SCM - No connection
2 GND - Ground
3 LO_VOL_DET O Low voltage detection signal
4 NC - No connection
5 TD_SW I TD terminal input signal mute switch
Microphone input signal switch,
6 MICAD_SW I changed to analog modulation or
NXDN modulation
7 MIC_SW I Microphone mute switch
Speaker signal switch, changed to ana-
8 RXAD_SW I log reception signal or NXDN reception
signal
Analog or NXDN modulation route
9 PATH_SW I
selector switch
10 BEEP_SW I Beep sound mute switch
11 TA_SW I TA input mute switch
TA input signal, changed to analog
12 TAAD_SW I
modulation or NXDN modulation
13 EVOL_LD I Load for electronic volume
14 GND - Ground
15 EVOL_CLK I Clock for electronic volume
16 PTT_AM16C O PTT signal
17 EVOL_DATA I Data for electronic volume
18 INSP_SW - No connection
19 AF_MUTE I Speaker output mute switch
20 SCM_EN - No connection
21 AMP_SW I Speaker amplifi er power ON/OFF switch
22 HOOK_RXD_SCM - No connection
23 NC - No connection
24 INRA_SW - No connection
25 MIC_D_IN O NXDN transmission signal output
26 BEEP I Beep sound signal input
27 RX_AUDIO_D I NXDN reception signal input
28 GND - Ground
29 MOD_D_OUT I NXDN modulation signal input
30 PWR_ST_R I Switch for red LED (Power sourse)
31 VOLUME_IN O Volume control input for AF signal
32 OCXO_ST_G I Switch for green LED (OCXO)
33 OCXO_ST_R I Switch for red LED (OCXO)
34 RX_POWER_SAVE I RX unit power saving signal
35 GND - Ground
36 GND - Ground
TERMINAL FUNCTION
Function
Pin No. Name I/O
CN2 (To X53-414 CN402)
System reset signal from modem con-
1 SYS_RST I
trol MPU
2 GND - Ground
3 BER_CLK I Serial clock for measurement bit error rate
4 BER_DAT I Serial data for measurement bit error rate
5 A16C_CK_SFT I "Frequency shift" signal to RF control MPU
6 TRUNKING O "Trunking mode" signal to Main MPU
"Frequency shift" signal to Analog
7 ADSP_CK_SFT I
mode DSP
8 GND - Ground
"Detect accident of RF block" signal to
9 RADIO_ERR O
Main MPU
10 QT_DQT O "Detect QT or DQT" signal to Main MPU
"During the transmission" signal to
11 TX_STATE O
Main MPU
12 RF_PTT O "Press-to-talk-switch" signal to Main MPU
13 GND - Ground
UART signal from Main CPU to RF
14 STXO_ARXO I
control MPU
UART signal from RF control MPU to
15 SRXO_ATXO O
Main MPU
16 GND - Ground
17 SC_SH O "Squelch control" signal to Main MPU
"External press-to-talk-switch" signal to
18 E_PTT_SH O
Main MPU
19 NC - No connection
20 50MPU_CONT I 5V regurator control
21 33SH I 3.3V constant voltage
22 33MPU_A O 3.3V constant voltage
23 50MPU_A O 5V constant voltage
24 33MPU_A_GND - Ground
25 33MPU O 3.3V constant voltage
26 33MPU O 3.3V constant voltage
27 33MPU_A_GND - Ground
28 DC50 O 5V constant voltage
29 DC50 O 5V constant voltage
30 DC50 O 5V constant voltage
31 DC50 O 5V constant voltage
32 50MPU_A_GND - Ground
33 50MPU O 5V constant voltage
34 50MPU_A_GND - Ground
35 GND - Ground
36 HI_VOL_DET O Voltage monitor
NXR-700
Function
29