Kyocera FS-1030D

2G6
2-3-5
(3) Polygon motor control circuit
The main PWB supplies the 2,799.21 Hz clock pulse (PLGCLK) via the engine board to the PLL control IC (IC1) for the
polygon motor. To begin printing, the engine CPU U1 turns PLGDR to H level, the PLL control IC (IC1) starts to revolve the
polygon motor so that the revolution is 27,992.1 rpm which depends on the PLGCLK clock pulse. When PLL control IC
(IC1) finds that the polygon motor is revolving at the rated speed, turns PLGDRN to L level to acknowledge the engine CPU
that the rated speed has been achieved.
On the contrary, if PLGRDYN does not turn to L level within 8 seconds since PLGDRN has been L level.
Figure 2-3-5 Polygon motor control circuit
GND
2
3
1
Q7
Q9
+5V
+
PGND
PGND
+24V3
+24V3
PGND
PLGDRN
PLGRDYN
PLGCLK
YC6
5
4
3
2
1
PLGRDYN
MRDYN
PLGMRDY
PLGDR
PLGCLK
CPU
U1
Polygon motor
PLL
control IC
(IC1)
31,181 rpm
Engine PWB
Main PWB
Main motor
Polygon motor control circuit
Laser scanner unit
GND
QA7