Laser Unit Cooling Fan; Polygonal Motor - Toshiba e-studio3511, e-studio4511 Manual

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
8
(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
e-STUDIO3511/4511 LASER OPTICAL UNIT
PD4
DCCLK4
Gate array
LCA301-1
PI1
PWA-F-LGC
Level "L" Level "H"
ON
—
Normal rotation Abnormal rotation
Fig. 8-501
OFF Polygonal motor ON/OFF signal
— Polygonal motor reference clock signal
Polygonal motor PLL signal
8 - 8
POMON
POMCK
POMPL
M/DC-POL
Remarks
November 2003 © TOSHIBA TEC