Service manual

REPAIR
Troubleshooting
SERVICE MANUAL
3-40
Table 3.3 FDD Special Test Error Codes
ERROR NO. DESCRIPTION
1 READY signal has not been detected, although drive motor is ON
Disk change signal could not be cleared
2 Disk change detected in the disk change check
3 Write protect error
Write protect status detected in the write protect check
6 No ID found
No address mark for ID area found
No address mark for data area found
A CRC error at the ID area
CRC error at the data area
F SEEK command or RECALIBRATE command not completed normally
IRQ not detected in IRQ waiting status
No command or parameter output
Data overrun detected
End of DMA transfer not detected
Number of sectors for which reading/writing requested was 0
Attempt made to access sectors beyond the final sector on the disk
Could not receive RESULT CODE
NOTES:
•
If an error occurs at any of the steps corresponding to the stage numbers in Table 3.2,
only stage C is executed and the check is terminated.
•
Formatting, reading, and writing are performed on both sides of the disk.
•
To check formatting, the reading verification check is performed.