Toshiba Tecra M5 Maintenance Manual - Page 112

2 Troubleshooting Procedures Procedure 2 Connector Check The sound function-wiring diagram is shown below: 2.14 Sound Troubleshooting 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 stereo speakers do not work correctly, perform Check 1. 2. If the headphone does not work correctly, perform Check 2. 3. If the microphones do not work correctly, perform Check 3. Check 1 If the stereo speakers do not work properly, the speaker cable may be disconnected. Make sure the speaker cable is firmly connected to CN6170 on the GN board. If the stereo speakers are still not functioning properly, go to Check 4. 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 GN board. If the sound function still does not work properly, go to Check 4. Check 3 If the microphones do not work properly, the internal microphone cable or external microphone cable may be disconnected. When the internal microphone malfunctions, make sure the internal microphone cable is firmly connected to CN6050 on the GN board. When using the external microphone, make sure the external microphone cable is firmly connected to J6051 on the GN board. If the microphones are still not functioning properly, go to Check 4. Check 4 Make sure the GN board flexible cable is firmly connected to PJ9510 on the GN board and to CN9500 on the system board. If the GN board flexible cable is disconnected, connect it firmly. If the sound function is still not functioning properly, go to procedure 3. 2-58 [CONFIDENTIAL] TECRA M5 Maintenance Manual (960-542)