Brother Laser MFC-4800, Service Manual

Page: 113 / 205

6-2
Messages on the LCD Probable Cause
CHECK ORIGINAL
Remove original, and then
press STOP KEY.
(These messages appear
alternately.)
(See NOTE below.)
or
CHECK DOCUMENT
Remove document, then
press STOP KEY.
(These messages appear
alternately.)
Document loading error
(1) The document rear sensor detects no leading edge of a
document within 10 seconds from the start of document
loading operation.
(The document rear sensor stays OFF even after the
document has been fed when the document front sensor was
ON.)
(2) The loaded document is too short.
(Since the document is shorter than the distance between the
document front and rear sensors, the document front sensor
is turned OFF before the document rear sensor is turned
ON.)
CHECK DRUM UNIT
Open cover, then reinstall
drum unit.
(These messages appear
alternately.)
No drum unit is loaded.
CHECK PAPER
Reload paper by using lever,
then press FAX START.
(These messages appear
alternately.)
Even after paper pick-up operation, the registration sensor does
not detect paper.
CHECK PAPER SIZE
Reload correct paper, then
press FAX START.
(These messages appear
alternately.)
The registration sensor detects that paper shorter than the
specified length has been fed.
(This message appears only when a received message is
printed.)
CLEAN UP SCANNER In the scanning compensation data list printed by the mainte-
nance-mode function code 05, less than fifty percent of the
white level data is faulty.
(This message may appear only in the maintenance mode.)
COOLING DOWN
WAIT FOR A WHILE
(These messages appear
alternately.)
The controller, which monitors the internal resistance of toner
thermistor, has detected that the toner temperature exceeded the
specified level. If the temperature exceeds the preset level,
recording is no longer possible.
If the toner temperature drops, the equipment will be
automatically recovered from the error state.
NOTE: This message appears in North American models.