Toshiba A3X manual Modem Troubleshooting Troubleshooting Procedures

2.11 Modem Troubleshooting 2 Troubleshooting Procedures

2.11 Modem Troubleshooting

To check if the modem is defective or malfunctioning, follow the troubleshooting procedures below as instructed.

Procedure 1 Diagnostic Test Program Execution Check

Procedure 2 Connector Check and Replacement Check

Procedure 1 Diagnostic Test Program Execution Check

Execute Modem test in the LAN/Modem/Bluetooth/IEEE1394 test program. Refer to Chapter 3, Tests and Diagnostics for more information on how to perform the test program.

If any error is detected, perform Procedure 2.

Procedure 2 Connector Check and Replacement Check

An MDC (Modem Daughter Card) is used as the modem for this computer. The MDC is connected to the system board by connector. If the modem malfunctions, these connections may be bad or the MDC or system board might be faulty.

Disassemble the computer following the steps described in Chapter 4 and perform the following checks:

Check 1 Make sure the MDC has been firmly connected to the CN3010 on the system board and the modem harness has been firmly connected to the both connectors on the system board and on the modem.

Modem jack

Modemharness

MDC

12-pin

CN3011 CN3010

System board

If any connector is disconnected, connect it firmly and return to Procedure 1. If there is still an error, perform Check 2.

Check 2 The Modem jack may be faulty. Replace it with a new one. If the modem function is still not working properly, perform Check 3.

Check 3 The MDC may be faulty. Replace it with a new one following the steps in Chapter 4. If the modem function is still not working properly, perform Check 4.

Check 4 The system board may be faulty. Replace it with a new one following the instructions in Chapter 4

Satellite A50S/TECRA A3X Maintenance Manual (960-534) [CONFIDENTIAL] 2-43