Parts/Test Point Locations 5-17
System Board Connector Pin Signals
Monitor Port Signals
Pin Signal Name I/O Pin Signal Name I/O
1 Red Video O 9 +5 V dc
2 Green Video O 10 Synch Ground
3 Blue Video O 11 Monitor ID Bit 0 I
4 Monitor ID Bit 2 I 12 SDA I
5 Synch Ground 13 Horizontal Synch O
6 Red Ground 14 Vertical Synch O
7 Green Ground 15 SCL I
8 Blue Ground
Parallel Port Signals
Pin Signal Name I/O Pin Signal Name I/O
1 Strobe O 14 Auto Feed N/A
2 Data Bit 0 I/O 15 Error I
3 Data Bit 1 I/O 16 Initialize O
4 Data Bit 2 I/O 17 Select (In) O
5 Data Bit 3 I/O 18 Ground Power
6 Data Bit 4 I/O 19 Ground Power
7 Data Bit 5 I/O 20 Ground Power
8 Data Bit 6 I/O 21 Ground Power
9 Data Bit 7 I/O 22 Ground Power
10 Acknowledge I 23 Ground Power
11 Busy I 24 Ground Power
12 Paper Empty I 25 Ground Power
13 Select O
Serial Port Signals
Pin Signal Name I/O Pin Signal Name I/O
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