Polygonal Motor Control Circuit - Toshiba e-STUDIO2330C Service Manual
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Also See for e-STUDIO2330C:
- Service handbook (512 pages) ,
- Management manual (226 pages) ,
- Copying manual (174 pages)
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9.3.2
Polygonal motor control circuit
The polygonal motor is a DC motor rotated by a clock signal (PMCK) output from the ASIC. This motor
is controlled under PLL (Phase Locked Loop) to realize an accurate and constant rotation. Its rotation
status is converted to a status signal (PMRDY) and then output to the ASIC. PMRDY signal moves to a
low level only when the rotation status of the motor is constant. The ASIC detects the rotation status
with this signal, and emits a laser beam only when the rotation status is constant.
LGC board
IC48
ASIC
IC60
ASIC
Control signal
Signal
PMMTR
Motor ON signal
PMCK
Reference clock
PMRDY
PLL control signal
e-STUDIO2330C/2820C/2830C/3520C/3530C/4520C
LASER OPTICAL UNIT
IC84
PMCK
IC79
PMMTR
+5.1VB
PMRDY
Fig. 9-10
Function
9 - 8
+24VD1
Status
High level
OFF
---
Stopping or error
© 2008, 2009 TOSHIBA TEC CORPORATION All rights reserved
Polygonal motor
Low level
ON
---
Locked
(Rotating at a constant
speed)
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