Brother International HL 1850 Service Manual - Page 191

HL-1850/1870N SERVICE MANUAL 3.3 Paper Feeding Problems Even if the paper is printed and ejected without any problems such as paper jams, paper feeding problems below may appear. Users can clear these problems by following the `User Check' items for each problem. Even if the same problem occurs again, follow the procedures in the table below. F-1 Double feeding rLfAr User Check Check the paper used meets the recommended paper specifications. Possible cause Separation pad Step 1 Check Is the surface of the separation pad worn out? Result Yes Remedy Replace the separation pad. F-2 Wrinkles or creases LIS User Check (1) Check that paper is loaded into the paper cassette correctly. (2) Check the paper used meets the recommended paper specifications. (3) Try printing using the straight-through output path. (4) Turn over the stack of paper in the cassette or try rotating the paper 180° in the cassette. Possible cause Paper Step 1 Check Is the problem solved if new paper is used? Fixing unit entrance guide Fixing unit 2 Is the entrance guide dirty? 3 Is the pressure roller dirty? Result Yes Yes Remedy Instruct the user how to store paper so that it does not absorb moisture. Clean the entrance guide. Yes Clean the pressure roller. No Replace the fixing unit. F-3 Page skew LA User Check (1) Check that the paper or other media is loaded into the paper cassette correctly and that the paper guides are not too tight or too loose against the paper stack. (2) If using the manual feed slot, check how to load paper into the manual feed slot correctly. (3) The paper cassette may be too full. Load paper below 27mm in depth. (4) Check the paper used meets the recommended paper specifications. 6-23