Lenovo PC 300 Hardware Maintenance Manual (HMM) for Aptiva, IBM PC300, and Net - Page 124

J13/ J20: USB Port Selection Optional, Back Front Panel USB Port Enabled.

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JP3: TEL -The connector for Modem with internal voice connector. Pin No. Function 1 Phone-in 2,3 GND 4 Mono-out JP1: STR Enable Pin No. Function Close STR Enable Open STR Disable (Default) JP14: Case Open Pin No. Function 1 Signal 2 GND JP13: Safe Mode/Recovery/Normal Pin No. Function 1-2 close Normal (Default) 2-3 close Safe Mode 1-2-3open Recovery JP16: Top Block Lock Pin No. Function Open Top Block Lock Close Top Block Unlock (Default) JP15: Timeout Reboot Pin No. Function Open Timeout Reboot. Close No Reboot on Timeout. (Default) JP17: Onboard Sound function (Optional) Pin No. Function 1-2 close Enabled Sound.(Default) 2-3 close Disabled Sound. J13/ J20: USB Port Selection (Optional) Pin No. Function 1-2 close Front Panel USB Port Enabled. 2-3 close Back Front Panel USB Port Enabled. 124

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124
±
JP3: TEL –The connector for Modem with internal voice connector.
Pin No.
Function
1
Phone-in
2,3
GND
4
Mono-out
±
JP1: STR Enable
Pin No.
Function
Close
STR Enable
Open
STR Disable (Default)
±
JP14: Case Open
Pin No.
Function
1
Signal
2
GND
±
JP13: Safe Mode/Recovery/Normal
Pin No.
Function
1-2 close
Normal (Default)
2-3 close
Safe Mode
1-2-3open
Recovery
±
JP16: Top Block Lock
Pin No.
Function
Open
Top Block Lock
Close
Top Block Unlock (Default)
±
JP15: Timeout Reboot
Pin No.
Function
Open
Timeout Reboot.
Close
No Reboot on Timeout. (Default)
±
JP17: Onboard Sound function (Optional)
Pin No.
Function
1-2 close
Enabled Sound.(Default)
2-3 close
Disabled Sound.
±
J13/ J20: USB Port Selection (Optional)
Pin No.
Function
1-2 close
Front Panel USB Port Enabled.
2-3 close
Back Front Panel USB Port Enabled.