Brother International IntelliFax-4750 Service Manual - Page 179
Clean Up Scanner, Cooling Down
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Messages on the LCD DOCUMENT JAM CLEAN UP SCANNER SCANNER ERROR TONER LOW TONER EMPTY COOLING DOWN Probable Cause n Document jam (1) The document length exceeds the limitation (400 or 90 cm) registered by firmware switch WSW16. (Refer to Chapter V, Section 3.5.) (Both the document front and rear sensors stay ON after the document has been fed by the registered length.) (2) The document rear sensor detects no trailing edge of a document after the document has been fed by 400 cm. (The document rear sensor stays ON even after the document has been fed when the document front and rear sensors were OFF and ON, respectively.) n 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.) In the scanning compensation data list printed by the maintenance-mode function code 05, less than fifty percent of the white level data is faulty. (This message may appear only in the maintenance mode.) In the scanning compensation data list printed by the maintenance-mode function code 05, fifty percent or more of the white level data is faulty. (This message may appear only in the maintenance mode.) The toner sensor has detected that there is not enough toner. The toner sensor has detected that there is no toner in the cartridge or that no toner cartridge is loaded. If this message appears, recording is no longer possible. The controller, which monitors the internal resistance of the incasing temperature sensor (thermistor) and heater thermistor, has detected that the temperature inside the equipment or the heater temperature exceeded the specified level. If either temperature exceeds the preset level, recording is no longer possible. VI - 2