2. Product specifications and descriptions
2-43
Samsung Electronics
Service Manual
SCX-483x/5x3x series
2.2.6.4 LSU
LSU receives the image data from PVC or HPVC and make the latent image on OPC surface.
It uses the single beam, LD. The errors related to LSU are as follows:
• By Lready
When the printing is started, the engine drives the polygon motor of LSU. After the specified time is elapsed,
if the motor is not in a ready status, the engine detects the error that the polygon motor is not in a ready
status. If this error happens, the engine stops all functions and keeps it at the error state. Also, the engine
informs the error status of the main system and the error message is displayed at LCD window to inform the
error status of the user.
• By Hsync
When the polygon motor is ready, the LSU sends out the signal called Hsync and used to synchronize with
each image line. So, if the engine does not detect consecutively the signal for a fixed time, it defines the
Hsync Error. If this error happens, the engine stops all functions and keeps it at the error state. Also, the
engine informs the error status of the main system and then the error message is displayed at LCD window
to inform the error status of the user. LSU Error Recovery: If the LReady or Hsync error happens, the paper
is exited before the error code is initiated. The engine mode is changed to recovery mode and the engine
informs the main system of the engine mode. And the engine checks the LSU error. If the error doesn’t
happen, the printing job.
