Floppy Disk Drive (Fdd) Troubleshooting - Toshiba Libretto 50CT User Manual

2 Troubleshooting Procedures
2.5

Floppy Disk Drive (FDD) Troubleshooting

This section describes how to determine if the 3.5-inch FDD is functioning properly.
Perform the steps below starting with Procedure 1 and continuing with the other procedures
as required.
Procedure 1: FDD Head Cleaning Check
Procedure 2: Diagnostic Test Program Execution Check
Procedure 3: Connector Check and Replacement Check
Procedure 1 FDD Head Cleaning Check
FDD head cleaning is one option available in the Diagnostic Program. Detailed operation is
given in Chapter 3, Tests and Diagnostics.
Insert the Diagnostics disk in the computer's floppy disk drive, turn on the computer, and
run the test; then clean the FDD heads using the cleaning kit. If the FDD still does not
function properly after cleaning, go to Procedure 2.
If the test program cannot be executed on the computer, go to Procedure 2.
Procedure 2 Diagnostic Test Program Execution Check
Insert the diagnostics disk into the FDD, turn on the computer, and run the test. Refer to
Chapter 3, Tests and Diagnostics, for more information about the diagnostics test
procedures.
Floppy disk drive test error codes and their status names are listed in Table 2-5. Be sure the
floppy disk in the FDD is formatted correctly and that the write protect tab is disabled. If
any other errors occur while executing the FDD diagnostics test, go to Check 1.
Libretto 50CT/70CT Maintenance Manual
2.5 Floppy Disk Drive (FDD) Troubleshooting
Table 2-5 FDD error codes and statuses
Code
01h Bad command
02h Address mark not found
03h Write protected
04h Record not found
06h Media removed on dual attach card
08h DMA overrun error
09h DMA boundary error
10h CRC error
20h FDC error
40h Seek error
60h FD not in drive
80h Time out error (Not ready)
Status
2-17