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general maintenance information
3.5
CONNECTOR INFORMATION
The following tables define the connector pin-outs for the
communication, keyboard, and monitor/power supply connectors.
CONNECTOR J1 (Modem Port)
Pin #
1
2
3
4
5
7
8
9
14
18
20
24
25
Signal Name
Shield Ground (AA)
Transmit Data (TXD)
Receive Data (RXD)
Request To Send (RTS)
Clear To Send (CTS)
Signal Ground (AB)
Data Carrier Detect (DCD)
Dot Clock Out
HSync. Out
External Video Input
Data Terminal Ready (DTR)
Vertical Sync. Out
External Dim Input
Pins 6, 10, 11, 12 13, 15, 16, 17, 19, 21, 22, & 23 have
no connection.
CONNECTOR J2 (Printer Port)
Pin #
Signal Name
1
Shield Ground
2
Receive Data
3
Transmit Data
4
Request To Send
6
Data Set Ready
7
Signal Ground
8
Data Carrier Detect
20
Data Terminal Ready
Pins 5,9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,21,22,23
24, & 25 have no connection.
CONNECTOR J3 (Keyboard Interface)
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
Signal Name
Chassis Ground
Log ic Ground
+5V
Address bit 2
Address bit 1
Address bit 0
Address bit 3
Address bit 5
Address bit 6
Address bit 4
Key Return
N/C
CONNECTOR J4 (Monitor/Power Supply)
Pin #
Signal Name
1
Video
2
Video Ground
3
Dim
4
Horizontal Drive
5
Vertical Drive
6
+12V
7
-12V
8
+5V
9
Ground (Power)
10
Ground (Power)
11
-23V
12
+5V
3-5
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