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C141-E112-01EN
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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 - 6
4.5 Self-calibration ..................................................................................................................... 4 - 8
4.5.1 Self-calibration contents.......................................................................................................4 - 8
4.5.2 Execution timing of self-calibration..................................................................................... 4 - 9
4.5.3 Command processing during self-calibration....................................................................... 4 - 9
4.6 Read/write Circuit ................................................................................................................ 4 - 10
4.6.1 Read/write preamplifier (PreAMP) ...................................................................................... 4 - 10
4.6.2 Write circuit.......................................................................................................................... 4 - 10
4.6.3 Read circuit........................................................................................................................... 4 - 11
4.6.4 Synthesizer circuit ................................................................................................................ 4 - 12
4.7 Servo Control ....................................................................................................................... 4 - 12
4.7.1 Servo control circuit ............................................................................................................. 4 - 13
4.7.2 Data-surface servo format .................................................................................................... 4 - 16
4.7.3 Servo frame format............................................................................................................... 4 - 16
4.7.4 Actuator motor control ......................................................................................................... 4 - 18
4.7.5 Spindle motor control........................................................................................................... 4 - 19