Ricoh Aficio BP20 - Page 51

G144
Ricoh Europe B.V.
Technical Training Centre
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51
Slide 51
LSU Errors
 Polygon motor error
 The polygon motor speed does not become
stable
 Hsync error
 The polygon motor speed is stable, but the Hsync
is not generated
5. Engine
More on LSU Errors
 The LSU consists laser diode and the polygon motor control.
 The laser diode turns on and the polygon motor is enabled when the printing
signal occurs.
 Hsync occurs when the light sensor detects the beam, and LReady occurs
when the polygon motor speed becomes normal.
 The LSU is ready if these two conditions are satisfied.