Confidential
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New toner detection mechanism
The printer detects the amount of the remaining toner with the sensor and indicates the timing to
replace the toner cartridge by displaying ‘Toner Life End’ on the LCD to the user. The problem
such as toner leak or image defect may occur when low-duty printing is continued for a long time.
To prevent such a problem, the printer provides the function displaying the ‘Toner Low’ message
on the LCD when the toner is used to a certain degree to indicate it to the user.
When replacing the toner cartridge with a new one, the printer detects that the toner cartridge is
replaced with a new one by the new toner detection switch and cancels the message on the LCD.
The mechanism to detect the new toner cartridge is as follows:
(1) A new toner cartridge is installed into the drum unit, and the drum unit is installed into the
printer.
(2) The reset gear of the toner cartridge is contacted with the new toner actuator to push the new
toner actuator.
(3) Then, the new toner actuator pushes the new toner detection switch so that it is detected that
a new toner cartridge is installed.
(4) When the toner cartridge is installed into the printer, the reset gear is rotated by the main
motor drive and moved to the position of “Toner in use”.
When the reset gear is moved to the position of “Toner in use”, the new toner actuator is
pulled back by the new toner actuator spring and returned to the original position. When the
reset gear is at the position of “Toner in use”, the reset gear is not returned to the original
position since the reset gear and drive gear of the main motor are not engaged, and the reset
gear is not rotated.
New toner sensor
Main frame L
New toner actuator
New toner sensor
New toner actuator
Drum/toner ASSY
Reset gear
Summary of Contents for DCP-7010
Page 1: ...Confidential FACSIMILE EQUIPMENT SERVICE MANUAL MODELS MFC7420 7820N DCP7010 7020 7025 ...
Page 14: ...Confidential CHAPTER 1 PARTS NAMES FUNCTIONS ...
Page 20: ...Confidential CHAPTER 2 SPECIFICATIONS ...
Page 44: ...Confidential CHAPTER 3 THEORY OF OPERATION ...
Page 64: ......
Page 65: ...Confidential CHAPTER 4 TRANSFER OF DATA LEFT IN THE MACHINE TO BE SENT FOR REPAIR ...
Page 68: ...Confidential 4 2 Cover page sample End page sample ...
Page 69: ...Confidential CHAPTER 5 DISASSEMBLY REASSEMBLY AND LUBRICATION ...
Page 150: ...Confidential CHAPTER 6 ADJUSTMENTS AND UPDATING OF SETTINGS REQUIRED AFTER PARTS REPLACEMENT ...
Page 154: ...Confidential CHAPTER 7 CLEANING ...
Page 156: ...Confidential CHAPTER 8 MAINTENANCE MODE ...
Page 164: ...8 7 Confidential Scanning Compensation Data List a b c d e f g h i j k l m n q ...
Page 172: ...8 15 Confidential Configuration List ...
Page 178: ...8 21 Confidential Cover page sample End page sample ...
Page 187: ...Confidential CHAPTER 9 ERROR INDICATION AND TROUBLESHOOTING ...
Page 321: ...A NCU PCB MFC7420 U S A and CANADA models Confidential ...
Page 322: ...A NCU PCB MFC7820N U S A and CANADA models Confidential ...
Page 323: ...A NCU PCB MFC7420 EUROPE models Confidential ...
Page 324: ...A NCU PCB MFC7820N EUROPE models Confidential ...
Page 325: ...B Power Supply PCB 100V U S A and CANADA models Confidential ...
Page 326: ...B Power Supply PCB 200V EUROPE models Confidential ...
Page 327: ...December 04 SM FAX036 2 8C5A03 Printed in Japan ...