Polygon Motor Control Circuit - Kyocera Mita Ecosys FS-1010 Service Manual

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.
Main board
1700.8 Hz
PLGCLK
Engine board
Polygon motor control circuit
3
CPU
U01
PLGDR
2
1
Q09
GND
PLGRDYN
R32
3
2
Q10
1
Figure 4-3-7 Polygon motor control circuit
+24V
R35
+5V
R38
PGND
R41
YC06
C18
PGND
GND
4-25
Laser scanner unit
Polygon motor
+
17,008 rpm
+24V
5
PGND
4
PLGDRN
3
PLGRDYN
2
PLGCLK
1
PLL
control IC
(IC1)
FS-1010