Service manual

B-1
APPENDIX
B
Signal Description
This appendix provides signal descriptions for the Ultra 2 series system unit back
panel connectors.
■ Section B.1 “Keyboard/Mouse Connector, and Serial Ports A and B Connectors”
on page B-1
■ Section B.2 “Twisted-Pair Ethernet Connector” on page B-5
■ Section B.3 “Fast/Wide SCSI Connector” on page B-6
■ Section B.4 “Audio Port Connectors” on page B-8
■ Section B.5 “Parallel Port Connector” on page B-9
■ Section B.6 “Media Independent Interface Connector” on page B-11
■ Section B.7 “UPA Graphics Card 13W3 Connector” on page B-13
B.1 Keyboard/Mouse Connector, and Serial
Ports A and B Connectors
B.1.1 Keyboard/Mouse Connector
The keyboard/mouse connector is a DIN-8 type connector located on the
motherboard back panel. The following figure illustrates the keyboard/mouse
connector configuration and the following table lists the keyboard/mouse connector
pin assignments.
Note – All signals are standard TTL levels. The +5 VDC supply is fuse-protected.