Kenwood NXR-5700, Service Manual

Page: 33 / 122

(No.RA033<Rev.001>)1-33
2.8.7 TX Unit (XC1-0650-10) (B/3)
2 /RF_B_ON O RF +B switch control signal
3 GND - Ground
4 I2CCK2 O I2C clock2
5 GND - Ground
6 I2CDA2 I/O I2C data2
7 GND - Ground
8 /EWP O EEPROM write control signal
9 I2CDA I/O I2C data
10 33D O 3.3V power supply
11 I2CCK O I2C clock
12 NC - No connection
13 33MPU O 3.3V power supply
14 NC - No connection
15 FAN_PWM O PWM signal to define the number of
FAN rotation
16 GND - Ground
17 FAN_ON O FAN power supply control signal
18 GND - Ground
19 LOCK_DET I Detect FAN rotation lock
20 GND - Ground
21 GND - Ground
22 RAMP O RF power control voltage
23 GND - Ground
24 PRT_PWR O PA protection power level
25 LOW_PWR O Gain setting for APC loop at low pow-
er
26 PWR_LIM O Maximum output power limitter signal
27 MID_PWR O Gain setting for APC loop at mid pow-
er
28 PA_CUR I Monitor of the voltage which detects
current consumption of PA module
29 FI_VER_1 I Final unit H/W version detection
30 REV_PWR I Reverse power monitor
31 FI_VER_0 I Final unit H/W version detection
32 FWD_PWR I Forward power monitor
33 GND - Ground
34 CAP_TEMP I Monitor of LPF capacitors tempera-
ture
35 GND - Ground
36 TEMP_PRT I Alarm signal which detects the abnor-
mal final unit temperature
CN724 (To OCXO Unit X42-328 CN1)
1 33MPU O 33D, 3.3V power supply
2 GND - Ground
3 OX_SDA I/O I2CDA2, I2C data2
4 OX_SCL O I2CCK2, I2C clock2
Pin
No. Name I/O Function
5 OCXO_VR_E
N O /OC_VR_EN, Serial data enable sig-
nal to potentiometer of OCXO unit
6 OCXO_ON O Power supply switch for OCXO unit
7 OX_SCLK2 O SPSCLK1, SPI1 clock
8 OCXO_CUR
R I OC_CURR, Monitor of the voltage
which detects current consumption of
OCXO unit
9 OX_SDI2 I SPSI1, SPI1 data (serial data from
potentiometer IC)
10 OCXO_EXIS
T I Detect OCXO unit is working
11 OX_SDO2 O SPSD1, SPI1 data (serial data to po-
tentiometer IC)
12 GND - Ground
13 REF_SW2 O OCXO reference signal output switch
CN803 (To Final Unit XC3-015 C/5 CN703)
1 GND - Ground
2 +B I DC power supply
3 +B I DC power supply
CN804 (OCXO DC power suppy)
1 GND - Ground
2 +8 O 8V DC power supply
Pin
No. Name I/O Function
CN901 (To TX Unit XC1-065 C/3 CN951)
1 50MPU O 5.0V power supply
2 GND - Ground
3 33MPU O 3.3V power supply
4 /LED_LAT2 O Buffered serial port data latch signal
for LED driver ICs
5 /LED_OE2 O Buffered output enable signal for
LED driver ICs
6 LED_CK2 O Buffered serial port clock signal for
LED driver ICs
7 LED_DAT2 O Buffered serial port data signal for
LED driver ICs
8 LED1 O LED1 "DOT" signal
9 GND - Ground
10 LED10 O LED10 "DOT" signal
CN902 (To Control Unit XC1-064 CN310)
1 33AUD I 3.3V power supply
2 MIC O MIC signal
3 MIG - MIC Ground
4 GUARD - Guard
5 +B I Power supply input
6 GUARD - Guard
7 GND - Ground
Pin
No. Name I/O Function