Service Reference Guide, dx7300
433611-001
A–3
Connector Pin Assignments
Serial Interface, Powered and Non-Powered
Connector and Icon
Pin
Signal
1
2
3
Carrier Detect (12V if powered)
Receive Data
Transmit Data
4
5
6
Data Terminal Ready
Signal Ground
Data Set Ready
7
8
9
Request to Send
Clear to Send
Ring Indicator (5V if powered)
USB
Connector and Icon
Pin
Signal
1
2
3
4
+5 VDC
- Data
+ Data
Ground
Microphone
Connector and Icon (1/8” miniphone)
Pin
Signal
1 (Tip)
Audio_left
2 (Ring)
Power_Right
3 (Shield)
Ground
1 2 3
1 2 3
Headphone
Connector and Icon (1/8” miniphone)
Pin
Signal
1 (Tip)
Audio_Left
2 (Ring)
Audio_Right
3 (Shield)
Ground
1 2 3
Line-In Audio
Connector and Icon (1/8” miniphone)
Pin
Signal
1 (Tip)
Audio_In_Left
2 (Ring)
Audio_In_Right
3 (Shield)
Ground
1 2 3