Light source control method for electronic copier in manual tray mode
 A light source control method for an electronic copier includes the steps of: detecting a size of a document in response to input of a start key while the copier is in a manual tray copy mode; and moving an exposure lamp a given distance along a length of the document corresponding to the size of the document detected in the detecting step. The given distance equals a predetermined percentage of a reference value representative of a maximum scan distance of the exposure lamp. 
SamSung Electronics Co., Ltd.
G G
G03G G03G
additional inventional
Seung-Jae
Lee