Brother International HL-3400CN Service Manual - Page 270

CHAPTER 8 TROUBLESHOOTING 3.2 Inner Jam Table 8-4 Problem Item Transfer Unit Step 1 2 3 4 5 Check Item Open the transfer unit and check. Is there any paper inside the unit? Is the transfer roller firmly locked by the lock lever? Is the paper discharger unit installed in place? Is there paper dust around the registration roller? Is the wire of the paper discharger unit damaged? Fusing Unit . Is the fusing unit installed in 6 place? Is there any paper trapped 7 between the rollers? Is there fuser oil still in the oil 8 bottle? Result YES NO NO YES YES . NO YES NO Action Remove the paper inside. Fix the transfer roller with the lock lever. Install the paper discharger unit firmly in place. Clean the registration roller with a cotton cloth. Replace the existing paper discharger unit with a new one. Install the fusing unit firmly in place. Remove the trapped paper. Replace the existing oil bottle with a new one. 3.3 Outer Jam Table 8-5 Problem Item Print Paper Paper Exit Unit Step 1 1 2 Check Item Is the print paper a recommended paper? Is the paper exit unit firmly locked by the lock lever? Is there paper dust around the exit roller? Result NO NO YES Action Use a recommended paper. Open and close the paper exit unit again. Clean the exit roller with a cotton cloth. 3.4 Others Table 8-6 Problem Item Cause The edge of print paper is creased. Is the curled paper edge creased when the paper is loaded through the pick-up roller? Result Action YES Turn over the paper in the media cassette. 8-12