IBM 4846-545 Service Guide - Page 141
Mouse, connector, Microphone, Headphone
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Connector-pin assignments Table 31. Keyboard and mouse connector-pin assignments Pin Signal I/O Pin Signal I/O 1 Keyboard data I/O 4 +5 V Main I/O 3 Ground 5 Keyboard clock Mouse connector 6 5 4 3 2 1 Table 32. Keyboard and mouse connector-pin assignments Pin Signal I/O Pin Signal I/O 2 Mouse data I/O 4 +5 V Main I/O 3 Ground 6 Mouse clock Microphone connector The microphone connector is on the tower, at the lower left, below the side connector panel. Ground Signal 5v Table 33. Microphone connector-pin assignments Pin Tip Ring Base Signal Signal +5 V dc Ground Headphone connector The headphone connector is on the tower, at the lower left, below the side connector panel, with the microphone connector. Table 34. Headphone connector-pin assignments Pin Signal Tip Left channel audio Appendix C. System specifications and planning information 119