Brother HL-1850 Service Manual page 209

F-4 Curl or Wave
User Check
(1) Check the paper used meets the recommended paper specifications. Both high temperature and
humidity will cause paper to curl.
(2) If the printer is used infrequently, the paper may have sat for too long in the paper cassette. Turn
over the stack of paper in the paper cassette. Also, try rotating the paper 180° in the paper
cassette.
(3) Try printing using the straight-through output path.
NOTE:
For no paper supplied as the cause of a malfunction, see
‘MALFUNCTIONS’
F-5 Prints only single side of the paper when duplex printing
User Check
Check the size of the paper used meets the recommended paper specifications (A4 or Letter).
in this Chapter.
6-25
HL-1850/1870N SERVICE MANUAL
M-4 ‘No paper supplied’ in 5.