IBM 2193 Maintenance Service Manual page 156

SPKR: Speaker Connector
− − − −
1 +
HD: IDE Hard Disk Active LED
1
GN: Green Function Switch
Open : Normal operation
Short :Entering Green Mode
GD: Green LED
1
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PIN 1 : VCC (+)
PIN 2 : NC
PIN 3 : NC
PIN 4 : Data (−)
PIN 1: LED anode (+)
PIN 2: LED cathode (− − − − )
PIN 1 : LED anode (+)
PIN 2 : LED cathode (− − − − )