Service manual

REPAIR
SERVICE MANUAL
Troubleshooting
3-39
NOTES:
•
After completing the disk drive test, the carriage automatically returns and the test
result is printed:
•
SERIAL NO.: (if it was entered)
If normal: DISK TEST OK DISK TYPE 0 (2DD)
DISK TYPE 1 (2HD)
If disk switch is defective: DISK ERROR 01
If write-protect switch is defective: DISK ERROR 03
If other read/write errors occur: DISK ERROR 0F
•
If an error is detected, a two-digit error code is printed: the first digit is the stage
number in the test at which the error was detected; the second digit is the type of error
as described in the following tables.
Table 3.2 FDD Special Test Error Stage Codes
STAGE NO. DESCRIPTION
0 Output of ABORT command
Output of SPECIFY command
Switching drive motor ON
Checking write protect
1 Recalibration
Reading SSB3 by means of CHECK DRIVE STATUS command and
checking status of track 0 signal
Seeking cylinder 1
Reading SSB3 by means of CHECK DEVICE STATUS command and
checking status of track 0 signal
2 Seeking cylinder 0
Formatting cylinder 79
3 Formatting cylinder 0
4 Seeking cylinder 39
Formatting cylinder 39
5 Seeking cylinder 79
Formatting cylinder 79
6 Writing data for checking purposes (DB6DB6DB...)
7 Seeking cylinder 39
Writing data for checking purposes (B6DB6DB6...)
8 Seeking cylinder 0 (command = RECALIBRATE)
Writing data for checking purposes (6DB6DB6D...)
9 Reading and checking cylinder 0 data
A Seeking cylinder 39
Reading and checking cylinder 39 data
B Seeking cylinder 79
Reading and checking cylinder 79 data
C Recalibration
Switching drive motor OFF