Filter
Top Products
e-STUDIO3511/4511 LASER OPTICAL UNIT 8 - 8 November 2003 © TOSHIBA TEC
8
8.4 Laser Unit Cooling Fan
The laser unit cooling fan is a propeller fan (80 x 80 mm). It cools down the polygonal motor and the
Laser driving PC board.
8.5 Polygonal Motor
(1) Drive circuit of the polygonal motor
(2) Control signal
The polygonal motor is a DC motor which is PLL-controlled by clock signal. The signals from LGC
board controls the polygonal motor.
Signal
POMON
POMCK
POMPL
PWA-F-LGC
M/DC-POL
PD4
DCCLK4
PI1
POMON
POMCK
POMPL
LCA301-1
Gate array
Buffer (IC7407)
Fig. 8-501
Level “L”
ON
—
Normal rotation
Level “H”
OFF
—
Abnormal rotation
Remarks
Polygonal motor ON/OFF signal
Polygonal motor reference clock signal
Polygonal motor PLL signal