Scanner Adjustment

I use an epson L200 MFP. After getting it serviced, While scanning there is a dark shadow vertically about 1/2 inch wide. Is there any scanner adjustment program to correct this problem? Please tell me.
 
I use an epson L200 MFP. After getting it serviced, While scanning there is a dark shadow vertically about 1/2 inch wide. Is there any scanner adjustment program to correct this problem? Please tell me.
How about a picture/screenshot?
 
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