Kenwood NXR-901 Service Manual page 36

NXR-901
Pin No. Name I/O
18 SR_CLK I
19 GND -
20 SR_DATA I
21 GND -
22 STB1 I
23 GND -
24 K1 O Key Scan
25 K2 O Key Scan
26 K3 O Key Scan
27 K4 I
28 K5 I
29 DC8 I
30 GND -
31 50MPU I
32 50MPU I
33 DC8 I
34 DC8 I
35 GND -
36 DC8 I
CN923 (To X45-387 D/4 CN905)
1 VOLUME_IN I
2 33MPU O Switched 3.3V power supply
3 GND -
COM D-Sub 9-pin Connector
Pin Signal
Pin Name I/O
No. Type
1 CD I Digital
2 RD I Digital
3 SD O Digital
4 DTR O Digital
5 SG -
6 DSR I Digital
7 RTS O Digital
8 CTS I Digital
9 CI I Digital
36
TERMINAL FUNCTION
Function
Shift Register Clock
Ground
Shift Register Data
Ground
Shift Register Strobe
Ground
Key Scan
Key Scan
8V Power supply
Ground
Switched 5V power supply
Switched 5V power supply
8V Power supply
8V Power supply
Ground
8V Power supply
Volume control input for AF signal
Ground
Description /
port Type
Carrier Detect
Receive Data
Send Data
Data Terminal Ready
GND Signal GND
Data Set Ready
Request to Send
Clear to Send
Ringer DET
Pin No. Name
4 33AUD
5 SB
6 SCM_EN
7 GND
8 PTT_TXD_SCM
9 HOOK_RXD_SCM
10 MIG
11 MIC
TX unit (X56-3150-11) (C/3)
Pin No. Name
1 DC8
2 GND
3 50MPU
4 STB
5 SR_OE
6 SR_CLK
7 SR_DATA
8 LED1
9 GND
10 LED10
Specifi cation Min
Input voltage range –30
Input voltage range –30
Voltage swing ±5
Voltage swing ±5
- -
Input voltage range –30
Voltage swing ±5
Input voltage range –30
Input voltage range –30
I/O Function
O Switched 3.3V power supply
O Power supply output
- No connection
- Ground
I MIC PTT
I HOOK detect signal
- MIC ground
I MIC signal input
I/O Function
CN960 (To X56-315 B/3 CN920)
I 8V Power supply
- Ground
I Switched 5V power supply
I Shift Register Strobe
I Shift Register Output Enable
I Shift Register Clock
I Shift Register Data
I D960 segment "F" control
- Ground
I D961 segment "F" control
Typ Max Unit
- 30 V
- 30 V
±5.2 - V
±5.2 - V
- - - Conform to RS-232C
- 30 V
±5.2 - V
- 30 V
- 30 V
Remarks