Kenwood NXR-700 Service Manual page 32

NXR-700
Pin No. Name I/O
3 AO3 O Auxiliary output 3
4 SPO O Speaker AF output
5 AO2 O Auxiliary output 2
6 SPO O Speaker AF output
7 AO1 O Auxiliary output 1
8 SPI I
9 RSSI O RSSI output (Analog signal output)
10 RD O
11 GND -
12 SPG -
13 GND -
14 SPG -
15 NC -
16 NC -
17 SB O Power supply output
18 NC -
19 SB O Power supply output
20 NC -
CN60 (To Internal Speaker)
1 SPO O Internal speaker AF output
2 SPG -
Control Unit (X53-4140-10)
Serial data inable signal to potentiometer of OCXO unit
Pin No. Name I/O
CN300 (To X55-309 CN43)
RX_IF_VN I
CN400 (To X56-311 A/3 CN805)
1 GND -
2 GND -
3 REF_SW2 O
4 WP O Write protection signal to EEPROM
5 REF_SW O
6 OX_SCL O
7 EXT_EXIST I
8 OX_SDA I/O
9 REF_EXIST I
10 IMP_H_L -
11 REF_IN_OUT O
32
TERMINAL FUNCTION
Function
Internal speaker AF input
RX-DATA output (Equal to D-sub con-
nector terminal No22)
Ground
Speaker ground
Ground
Speaker ground
No connection
No connection
No connection
No connection
Internal speaker ground
Function
2nd IF signal (450 kHz) of NXDN mode
Ground
Ground
Control signal for reference clock
change circuit
Control signal for reference clock
change circuit
ADC of OCXO unit (for electric current
detection) to serial clock
External reference clock detection signal
ADC of OCXO unit (for electric current
detection) to serial data input/output
Reference clock detection signal
No connection
Control signal for reference clock
change circuit
Pin No. Name I/O
12 GND - Ground
Serial data input from potentiometer of
13 OX_SDI2 I
OCXO unit
14 GND - Ground
Serial data enable signal to potentio-
15 OCXO_VR_EN O
meter of OCXO unit
16 GND - Ground
17 OCXO_ON O Power source control of OCXO unit
18 GND - Ground
Monitor of the voltage which detects
19 OCXO_CURR I
current of OCXO unit
20 GND - Ground
21 OCXO_EXIST I Detection signal of OCXO unit presence
22 GND - Ground
DDS (5.99MHz) to serial data enabling
23 VCXO_DA_EN O
signal
24 GND - Ground
25 REF_LDT I Lock detection signal from PLL (19.2MHz)
26 GND - Ground
27 PLL_19_EN O Serial data enabling signal to PLL (19.2MHz)
28 GND - Ground
29 PLL_19_CE - No connection
30 GND - Ground
31 OX_SDO2 O DAC of OCXO unit to serial data output
32 GND - Ground
33 OX_SCLK2 O DAC of OCXO unit to serial clock output
34 33MPU O 3.3V constant voltage
35 GND - Ground
36 GND - Ground
CN401 (To X53-413 CN1)
1 GND - Ground
2 GND - Ground
3 RX_POWER_SAVE O Power saving signal of RX unit
4 OCXO_ST_R O OCXO LED red control
5 OCXO_ST_G O OCXO LED green control
6 VOLUME_IN I Voltage monitor for audio level control
7 PWR_ST_R O POWER LED red control
Transmission modulating signal of
8 MOD_D_OUT O
NXDN mode
9 GND - Ground
Reception demodulating signal of
10 RX_AUDIO_D O
NXDN mode
11 BEEP O Beep sound signal output
Audio signal before the transmission
12 MIC_D_IN I
compressing of the NXDN mode
Function