8
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LASER OPTICAL UNIT
8 - 7
8.4 Polygonal Motor
1) Drive circuit of the polygonal motor
Fig. 8-9
2) Control signal
The polygonal motor is a DC motor which is PLL-controlled by clock signals. The signals from LGC
board control the polygonal motor.
Signal Level “L” Level “H” Remarks
POMON ON OFF Polygonal motor ON signal
POMCK - - Polygonal motor reference clock signal
POMPL Normal rotation Abnormal rotation Polygonal motor PLL signal
LGC board
Polygonal motor
P54/BUSAK
PB6/TOA
P53/BUSRQ
POMON
POMCK
POMPL
Engine-CPU
IC22
IC8
Buffer
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