Confidential
3 - 1 3
3 Developing
Developing process means that an electrostatic latent image on OPC belt is made visible with
toner.
(1) Structure of toner cartridge PU (Refer to
Fig.3-9
& 3-15.)
1) Toner cartridge PU is located as shown in
Fig.3-9
.
2) Four toner cartridges are made available from the top to bottom in the order of
specified color as black, yellow, magenta and cyan.
3) Each color toner is loaded in the corresponding toner cartridge PU.
(2) Process of developing (Refer to
Fig.3-9
, 3-15,
3-16, and 3-17
.)
1) Toner adheres to the Dev.roller of toner cartridge PU.
Developing is processed by this Dev.roller contacting the OPC belt surface.
2) Dev.roller has been biased to the potential -DBV(V). Fig.3-16 describes the
relationship established between the potential of toner, the potential -V
0
(V) at the
non-exposed area of OPC belt and the potential -VR(V) at the exposed area of OPC
belt.
3) Developing is processed by the toner adhering to the OPC belt due to the attraction
between the potential of toner and the potential -VR(V) at the exposed area of OPC
belt. (Toner image is formed (visible) on the OPC belt.)
4) On the other hand, no development takes place at the non-exposed area because the
potential of toner and that of OPC belt is identical pole and therefore repels each
other.
Fig. 3-15
Summary of Contents for MFC-9420CN
Page 1: ...Confidential FACSIMILE EQUIPMENT SERVICE MANUAL MODELS MFC 9420CN ...
Page 16: ...Confidential CHAPTER 1 PARTS NAMES FUNCTIONS ...
Page 22: ...Confidential CHAPTER 2 SPECIFICATIONS ...
Page 33: ...Confidential CHAPTER 3 THEORY OF OPERATION ...
Page 48: ...Confidential 3 1 4 CBV DBV Fig 3 16 Y M C K Fig 3 17 ...
Page 69: ...Confidential 3 3 5 Fig 3 35 ...
Page 73: ...Confidential 3 3 9 3 Interface Circuit Printer side Fig 3 38 ...
Page 82: ...Confidential CHAPTER 4 TRANSFER OF DATA LEFT IN THE MACHINE TO BE SENT FOR REPAIR ...
Page 85: ...Confidential 4 2 Cover page sample End page sample Fig 4 1 ...
Page 86: ...Confidential CHAPTER 5 DISASSEMBLY REASSEMBLY AND LUBRICATION ...
Page 94: ...Confidential 5 5 5 1 1 AC Cord 1 Disconnect AC cord from the machine Fig 5 1 AC cord Machine ...
Page 175: ...Confidential CHAPTER 6 ADJUSTMENTS AND UPDATING OF SETTINGS REQUIRED AFTER PARTS REPLACEMENT ...
Page 203: ...Confidential CHAPTER 7 CLEANING ...
Page 205: ...Confidential CHAPTER 8 MAINTENANCE MODE ...
Page 213: ...8 6 Confidential Fig 8 2 Scanning Compensation Data List a b c d e f g h i j k l m n q ...
Page 224: ...8 17 Confidential Cover page sample End page sample Fig 8 8 ...
Page 255: ...Confidential CHAPTER 9 ERROR INDICATION AND TROUBLESHOOTING ...
Page 279: ...Confidential 9 23 2 Image failure 1 2 3 4 5 6 7 8 9 10 11 12 13 14 ...
Page 280: ...Confidential 9 24 15 a 15 b 16 17 18 19 20 21 22 23 24 25 Fig 9 1 ...
Page 325: ...App 1 5 Confidential 6 Transfer Unit X X X X X X 7 1 2 3 Location SERIAL NO YEAR MONTH DATE ...
Page 398: ...B Power Supply PCB 100V 127V Confidential ...