HP TC2120 - Manual (Page 13)

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Unless otherwise noted, the following features apply to all models. Some features are factory installed; others
are optional.
Mini-DIN (PS/2) Connectors
Table 2-1. Mini-DIN Connector Pinouts for the Mouse and Keyboard
2 External Connectors
Figure 2-1. Mini-DIN Connector (female) for the Mouse and Keyboard
Pin Number Signal Description
1 Data signal
2 Not used
3 Ground
4 Power (+5 V dc)
5 Clock signal
6 Not used
1 2
5 6
4 3