Toshiba PORTEGE R400 Maintenance Manual page 94

2 Troubleshooting Procedures
Procedure 2 Connector Check
The sound function-wiring diagram is shown below:
Any of the connections may be disconnected. Disassemble the computer following the steps
described in Chapter 4, Replacement Procedures and perform the following checks:
1. If the speaker does not work correctly, perform Check 1.
2. If the headphone does not work correctly, perform Check 2.
3. If the external microphone does not work correctly, perform Check 3.
4. If the Built in microphone does not work correctly, perform Check 4.
Check 1 If the speaker does not work properly, the speaker cable may be disconnected.
Make sure the speaker cable is firmly connected to CN6350 on the
USB/JACK/3G/SIM board. If the speaker is still not functioning properly, go to
Check 5.
Check 2 If the headphone does not work properly, the headphone cable may be
disconnected. Make sure the headphone cable is firmly connected to J6310 on the
USB/JACK/3G/SIM board. If the sound function still does not work properly, go
to Check 5.
Check 3 If the external microphone does not work properly, external microphone cable
may be disconnected. Make sure the external microphone cable is firmly
connected to J6051 on the USB/JACK/3G/SIM board.
If the external microphone is still not functioning properly, go to Check 5.
2-56 [CONFIDENTIAL] PORTEGE R400 Maintenance Manual (960-623)