Technical information

Troubleshooting and Repair
93
Disk Drive Maintenance
SX-200 LIGHT/DIGITAL Floppy Disk Subsystem
Troubleshooting Procedures
Table 13 outlines the most likely causes of Floppy Disk Subsystem
failure.
Table 13: Floppy Disk Troubleshooting Summary
Step Possible Malfunction Source
1.
Drive units require resets - power down the control bay (Bay 2
or Bay 0), and power up again. Check for error codes on the
Main Control Card numeric display - see Table 14.
2.
Faulty backplane connections.
3.
Faulty or improperly installed floppy disk.
4.
Faulty / corrupt / obsolete software - reload with correct soft-
ware.
5.
Faulty power supply unit(s) - refer to Power System Trouble-
shooting.
6.
Faulty Disk Drive unit.
7.
Faulty Main Control.
8.
Faulty cable connections.