Confidential
3 - 1 9
7
Second Transfer (Paper)
Second transfer process means that the toner image on the transfer belt is transferred onto the
transported paper.
(1) Structure of belt cleaning
1) Transfer roller for the second transfer is located as shown in
Fig.3-9
.
2) Transfer roller is normally separated from the transfer belt.
3) Transfer roller is positively biased by the power supply THV.
4) Transfer roller contacts to the transfer belt in the second transfer process.
5) Transported paper passes between the transfer roller and transfer belt.
(2) Process of belt cleaning (Refer to Fig.3-22.)
1) Paper is transported as synchronizing with the transfer belt.
2) Transfer roller operates as synchronizing with the transported paper, and contacts
with the transfer belt through the transported paper.
3) Transported paper passes between the transfer roller and transfer belt. In this instance,
the positive high voltage (THV) is injected to the transfer roller.
4) Negatively charged toner is moved to the positively charged paper.
5) Transported paper with the toner transferred is transported to the paper discharging
process.
Transfer Roller
Paper
THV: Power Supply for Transfer
Roller Bias.
+THV
Transfer Belt
Registration Roller
Transfer Unit
Fig. 3-22
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 ...