Toshiba T6400 Maintenance Manual page 19

Table of Contents

Contents

2.1 T6400 Troubleshooting ........................................................................................................ 2-5

2.2 Troubleshooting Flowchart .................................................................................................. 2-6

2.3 Power Supply Unit Troubleshooting Procedures .................................................................. 2-8

Procedure 1 AC Cord Check .............................................................................................. 2-9

Procedure 2 Connector Check ......................................................................................... 2-10

Procedure 3 Output Voltage Check ................................................................................. 2-11

2.4 System Board Troubleshooting Procedures ........................................................................ 2-12

Procedure 1 Message Check ............................................................................................ 2-13

Procedure 2 Printer Port LED Check ............................................................................... 2-15

Procedure 3 Diagnostic Test Program Execution Check .................................................. 2-19

2.5 Floppy Disk Drive Troubleshooting Procedures................................................................. 2-20

Procedure 1 FDD Head Cleaning Check .......................................................................... 2-21

Procedure 2 External 5-1/4" FDD Check ......................................................................... 2-22

Procedure 3 Diagnostic Test Program Execution Check .................................................. 2-23

Procedure 4 Connector and Replacement Check ............................................................. 2-24

2.6 Hard Disk Drive Troubleshooting Procedures .................................................................... 2-25

Procedure 1 Message Check ............................................................................................ 2-26

Procedure 2 Partition Check ............................................................................................ 2-27

Procedure 3 Format Check .............................................................................................. 2-28

Procedure 4 Diagnostic Test Program Execution and Replacement Check ...................... 2-29

2.7 Keyboard Troubleshooting Procedures .............................................................................. 2-30

Procedure 1 Diagnostic Test Program Execution Check .................................................. 2-31

Procedure 2 Connector and Replacement Check ............................................................. 2-32

2.8 Display Troubleshooting Procedures ................................................................................. 2-33

Procedure 1 Brightness Volume Check (for Plasma Type) .............................................. 2-34

Procedure 2 External CRT Check .................................................................................... 2-35

Procedure 3 Diagnostic Test Program Execution Check .................................................. 2-36

Procedure 4 Connector Check ......................................................................................... 2-37

Procedure 5 Replacement Check ..................................................................................... 2-38

Tables

Table 2-1 Output voltages ........................................................................................................ 2-11

Table 2-2 Printer port LED test status...................................................................................... 2-16

Table 2-3 Floppy disk drive error codes and status .................................................................. 2-23

Table 2-4 Hard disk drive error codes and statuses .................................................................. 2-28

Figures

Figure 2-1 Troubleshooting flowchart ......................................................................................... 2-6

Figure 2-2 Printer port LED ...................................................................................................... 2-15

2-3

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