Brother DP-550CJ, Service Manual

Page: 99 / 194

REPAIR
Troubleshooting
SERVICE MANUAL
3-36
7.3.4. FDD Tests
There are five tests of the FDD:
1. FDD Test ("7") - checks disk switch, write protect switch, and read/write errors.
2. Special FDD Test ("8") - checks disk type, write protect switch, and read/write.
3. FDD Switch Test ("9") - checks disk switch and write protect switch.
4. FDD Error Rate Check ("D") - checks for disk writing errors.
5. FDD Error Rate Check ("E") - checks for disk reading errors.
7.3.4.1. FDD Test
(1) Insert a non-write protected diskette in the disk drive, and if necessary, change the
"DISK TYPE" (2HD or 2DD) displayed on the Self Test menu to that of the test
diskette.
(2) With paper set, select "7" from the Self Test menu. If a serial number has not been
input before starting the menu, the pop-up window will prompt for the serial number;
either enter the serial number and press RETURN, or press RETURN to start the test.
The display as shown below appears, the test results are printed, and the display
returns to the SELF Test menu.
FDD TEST
***** *****
Working . . . .
Fig. 3.22 FDD Test (in progress) Display