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2 Troubleshooting Procedures 2.11 Modem Troubleshooting
2-48 TECRA M1 Maintenance Manual (960-436)
Procedure 2 Connector Check and Replacement Check
The Modem is installed as a modem daughter card (MDC). If the modem malfunctions, there
may be a bad connection between the MDC and the system board. Or the MDC, system
board or their connectors might be damaged.
Disassemble the computer following the steps described in Chapter 4, Replacement
Procedures and perform the following checks:
Check 1 Make sure the MDC is firmly connected to PJ2017 on the system board, and the
modem cable is connected to PJ1003 on the system board and the connector of the
MDC.
MDC
(Modem daughter card)
System Board
PJ2017
PJ1003
Modem cable
If a connector is disconnected, connect it firmly and repeat Procedure 1. If the
Modem is still not functioning properly, perform Check 2.
Check 2 The MDC or modem cable may be defective or damaged. Replace it with a new
one following the steps in Chapter 4, Replacement Procedures. If the modem is
still not functioning properly, perform Check 3.
Check 3 The system board may be defective or damaged. Replace the system board with a
new one following the steps in Chapter 4, Replacement Procedures.