Fujitsu MPG3xxxAT Product Manual page 9

3.4.2 Cable connector specifications ............................................................................................. 3 - 9
3.4.3 Device connection ................................................................................................................ 3 - 9
3.4.4 Power supply connector (CN1) ............................................................................................ 3 - 10
3.4.5 System configuration for Ultra DMA................................................................................... 3 - 10
3.5 Jumper Settings .................................................................................................................... 3 - 13
3.5.1 Location of setting jumpers .................................................................................................. 3 - 13
3.5.2 Factory default setting .......................................................................................................... 3 - 14
3.5.3 Jumper configuration............................................................................................................ 3 - 14
CHAPTER 4 THEORY OF DEVICE OPERATION .............................................................. 4 - 1
4.1 Outline .................................................................................................................................. 4 - 1
4.2 Subassemblies....................................................................................................................... 4 - 1
4.2.1 Disk ...................................................................................................................................... 4 - 1
4.2.2 Head...................................................................................................................................... 4 - 2
4.2.3 Spindle.................................................................................................................................. 4 - 3
4.2.4 Actuator ................................................................................................................................ 4 - 3
4.2.5 Air filter ................................................................................................................................ 4 - 3
4.3 Circuit Configuration............................................................................................................ 4 - 4
4.4 Power-on Sequence .............................................................................................................. 4 - 5
4.5 Self-calibration ..................................................................................................................... 4 - 7
4.5.1 Self-calibration contents ....................................................................................................... 4 - 7
4.5.2 Execution timing of self-calibration ..................................................................................... 4 - 8
4.5.3 Command processing during self-calibration....................................................................... 4 - 8
4.6 Read/write Circuit ................................................................................................................ 4 - 9
4.6.1 Read/write preamplifier (PreAMP) ...................................................................................... 4 - 9
4.6.2 Write circuit.......................................................................................................................... 4 - 9
4.6.3 Read circuit........................................................................................................................... 4 - 9
4.6.4 Time base generator circuit .................................................................................................. 4 - 10
4.7 Servo Control ....................................................................................................................... 4 - 12
4.7.1 Servo control circuit ............................................................................................................. 4 - 12
4.7.2 Data-surface servo format .................................................................................................... 4 - 15
4.7.3 Servo frame format............................................................................................................... 4 - 16
4.7.4 Actuator motor control ......................................................................................................... 4 - 17
4.7.5 Spindle motor control ........................................................................................................... 4 - 18
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