Fujitsu MAH3182MC Maintenance Manual page 14

6.3.2 Operation test ........................................................................................................................6-12
6.3.3 Diagnostic test .......................................................................................................................6-12
6.4 Troubleshooting Procedures..................................................................................................6-13
6.4.1 Outline of troubleshooting procedures ..................................................................................6-13
6.4.2 Troubleshooting with disk drive replacement in the field......................................................6-13
6.4.3 Troubleshooting at the repair site ..........................................................................................6-15
6.4.4 Troubleshooting with parts replacement in the factory..........................................................6-16
6.4.5 Finding possibly faulty parts..................................................................................................6-16
CHAPTER 7 ERROR ANALYSIS .............................................................................................7-1
7.1 Error Analysis Information Collection ..................................................................................7-1
7.1.1 Sense data..............................................................................................................................7-1
7.1.2 Sense key, sense code, and subsense code.............................................................................7-1
7.2 Sense Data Analysis ..............................................................................................................7-3
7.2.1 Error information indicated with sense data ..........................................................................7-3
7.2.2 Sense data (4-03-xx), (4-40-xx), (4-44-xx), and (4-C4-xx) ...................................................7-4
7.2.3 Sense data (1-1x-xx), (3-1x-xx) and (E-1D-00): Disk read error .........................................7-4
7.2.4 Sense data (5-2x-xx), (5-3D-00), (5-90-00), (B-47-xx), (B-49-00), (B-4D-xx) and
(B-4E-00): SCSI interface error ...........................................................................................7-4
CHAPTER 8 PRINCIPLE OF OPERATION ...........................................................................8-1
8.1 Outline...................................................................................................................................8-1
8.2 Disk Drive Configuration ......................................................................................................8-1
8.2.1 Disks......................................................................................................................................8-2
8.2.2 Heads.....................................................................................................................................8-2
8.2.3 Spindle mechanism................................................................................................................8-2
8.2.4 Actuator.................................................................................................................................8-2
8.2.5 Air filters ...............................................................................................................................8-2
8.3 Circuit Configuration.............................................................................................................8-3
8.4 Power-On Sequence ..............................................................................................................8-5
8.5 Factory-Calibration................................................................................................................8-6
8.6 Read/Write Circuit ................................................................................................................8-6
8.6.1 Head IC .................................................................................................................................8-6
8.6.2 Write circuit...........................................................................................................................8-7
8.6.3 Read circuit ...........................................................................................................................8-8
8.7 Servo Control ........................................................................................................................8-10
8.7.1 Servo control circuit ..............................................................................................................8-10
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