FUJITSU MCJ3230SS - Manual (Page 32)

General Description
1-10 C156-E224-01EN
1.2.4 Control circuit section
Figure 1.4 is the block diagram of the control circuit section.
Figure 1.4 Control circuit section block diagram
The control circuit section is divided into two parts: a controller section which
deals with control between the SCSI interface and drive interface, and a drive
circuit section which controls the drive.
(1) Controller circuit section
The controller circuit's reliability is improved by large-scale integrated circuit
technology. The high-speed microprocessor (MPU) handles SCSI interface
control and drive control such as drive read-and-write control and single-beam
control.
(2) Drive circuit section
The drive circuit section consists of the following circuits:
• Laser diode control circuit
• Signal reproduction circuit
• Servo/seek control circuit
• Rotation control circuit
• Drive miscellaneous control circuit