Kyocera Mita Ecosys FS-1010, Service Manual

Page: 76 / 172

4-25
FS-1010
Polygon motor control circuit
The main controller board supplies the 1700.8 Hz clock pulse (PLGCLK) via the engine board to
the PLL control IC (IC1) for the polygon motor. To begin printing, the engine CPU U01 turns
PLGDR to H level, the PLL control IC (IC1) starts to revolve the polygon motor so that the revolution
is 17,008 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, the LED indicator “
Call service 4000
” error is then displayed.
Figure 4-3-7 Polygon motor control circuit
GND
2
3
1
Q09
2
3
1
Q10
+5V
R35
R32
+
PGND
PGND
+24V
GND
R38
R41
C18
+24V
PGND
PLGDRN
PLGRDYN
PLGCLK
YC06
5
4
3
2
1
PLGRDYN
PLGCLK
PLGDR
CPU
U01
Polygon motor
PLL
control IC
(IC1)
1700.8 Hz
17,008 rpm
Engine board
Main board
Polygon motor control circuit
Laser scanner unit