![Brother MFC-9420CN Service Manual Download Page 186](http://html.mh-extra.com/html/brother/mfc-9420cn/mfc-9420cn_service-manual_54175186.webp)
6-10
Confidential
6.4.2 Replacement of Fusing Unit
<Criterion of Replacement>
It is recommended to replace with a new fusing unit according to the periodic maintenance cycle
listed in the
Table 6-1
to maintain the satisfactory print quality.
The suggested replacement timing is indicated on the control paned with the following message,
“REPLACE FUSER”.
Replace Fuser
<Purpose of Replacement>
To prevent the decline of fusing strength and print quality due to the deterioration of the fuser
roller.
<Tools and Replacement Materials>
Fusing unit (1 unit): Voltage specification to be confirmed.
WARNING
•
Fusing unit and its peripheral parts are very hot.
•
Prior to starting the replacement work, leave the machine for approx. ten minutes while the
power supply of the machine is ON. Then, turn it off and check that the unit and parts are well
cooled down.
<Work Procedure>
Sequence of Disassembling
(1) Turn off the machine’s power switch. To avoid injury, wait until the machine has cooled
down sufficiently before you replace the fusing unit.
(2) Open the
back
cover and the scanner unit of the machine.
Fig. 6-9
Scanner unit
Back
cover
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 ...