Atari 1040STE, Field Service Manual

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milliseconds. The highest and lowest values measured are displayed. The test
stops when any key is pressed.
7. Install Disks. Specify how many and what type of disk drives to test.
One additional test which can be performed is testing the write protect detection.
Slide the write protect tab to the protected position, and run test # 1. You should see
'F5 Write Protected– displayed if the drive has been installed, or 'unable to write oisk'
displayed if the drive has not been installed.
If more than one test is selected from the Main Menu, the Floppy Menu will not
appear, but the quick Test will be selected automatically.
3.16.1 Floppy Disk Test Error Codes
No Floppies Connected – The controller cannot read index pulses. The cable may
be improperly connected, or the drive has no power, or the drive is faulty.
F0 Drive not selected. Drive was installed, but failed attempting restore (seek
track 0). Check connection of cables, power to drive. Verify that the light on
the front of the drive goes on. Listen for the sound of the head seeking (the
slide on the diskette should open). If all this occurs, TR00 (pin 23 on the 1772)
should go low. If so, check for an interrupt on pin 28 of the 1772. If none,
replace the 1772. Else trace the interrupt to the MFP, verify that the MFP
responds by asserting INTR. If the drive is not being selected (no light), check
the PSG chip. Pin 20 should go low when drive A is selected, and pin 19
should go low when drive B is selected. If not, replace the PSG.
F1 Error of previous version that has been deleted. Error message now says
"Error Writing" (or reading or formatting), and displays a more specific error
message, e.g., "F9 CRC error."
F2 Error of previous version that has been deleted. Error message now says
"Error Writing" (or reading or formatting), and displays a more specific error
message, e.g., "F9 CRC error."
F3 Error of previous version that has been deleted. Error message now says
"Error Writing" (or reading or formatting), and displays a more specific error
message, e.g., "F9 CRC error."
F4 Seek Error. Verify that the STEP, MO, and DIRC outputs from the 1772 are
sent to the drive. Probable failure in the 1772, but the drive is also suspect.
F5 Write Protected. Check the write protect tab on the diskette. If OK, verify that
the WP input (1772, pin 25) is getting low during the test; if it is then the 1772
is defective: if not, the problem is with the disk drive.
F6 Read Compare Error. Data read from the disk was not what was supposed to
be written. Check in the following order: diskette, disk drive, 1772, and DMA
Controller.
F7 DMA Error. DMA Controller could not respond to a request for DMA. Replace
the DMA Controller. If error persists, check FDRQ while running the test. It
should normally be low and go high with each data byte transferred. If stuck
high, push the reset button and verify that MR (1772, pin 13) goes low. If not,
trace RESET to its source. If MR is OK, but FDRQ is still stuck, replace the
1772.