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October 9th, 1995
DETAILED SECTION DESCRIPTIONS
PCBs AND THEIR FUNCTIONS
2.5.4. SDU (Scanner Drive Unit)
Motor signal
Scanner
Drive circuit
motor
+5V
+24 VSDU
Xenon
Inverter circuit
lamp
Lamp control
signal
G404D507.wmf
The SDU contains the drive circuits for the scanner drive motor and the
xenon lamp. The control signals such as drive, rotating direction, and drive
current for the scanner motor come from the SCU through the MBU. Also, the
control signal for the xenon lamp comes from the SCU through the MBU.
2-23
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