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Confidential
9-2
ERROR MESSAGE
CAUSE
ACTION
Disconnected
The other person or other person’s
fax machine stopped the call.
Try to send or receive again.
Document Jam
The document was not inserted or
fed properly, or the document
scanned from the ADF was too
long.
Remove the jammed document paper.
DR Mode in Use
The machine is set to distinctive
ring mode. You can not change
the receive mode from manual to
another mode.
Set distinctive ring to off.
Near Waste Toner
The waste toner pack is nearly
full.
Replace the waste toner pack.
No Fusing Unit
The fusing unit was not detected.
Please install one.
No OPC Belt
The OPC belt cartridge is not
installed.
Install the OPC belt cartridge.
Check that the charging roller (on the
bottom of the OPC belt cartridge) is
locked in place and the levers are
closed.
No Paper Fed #1
No Paper Fed #2
The machine is out of paper or
paper is not properly loaded in the
indicated paper tray.
Refill the paper in the paper tray, and
then press
Black Start
or
Color Start
.
- OR -
Remove the paper and load it again,
and then press
Black Start
or
Color Start
.
No Response/Busy
The number you dialed does not
answer or is busy.
Verify the number and try again.
No Toner X
X = C, M, Y, BK
The toner cartridge is not installed
properly.
Reinstall the X toner cartridge.
No TR Roller
The transfer roller is not installed.
Install the transfer roller.
Not Registered
You tried to access a one-touch
or speed dial number that is not
programmed.
Set up the one-touch or speed dial
number.
Paper Jam X
X = A1, A2, B or C
Remove the jammed paper.
See the alphanumerical diagram to
check on the location.
Remove the jammed paper.
Paper Type Error
The wrong media type is set in the
paper tray.
Specify the correct media type in the
paper tray.
Replace 120K Kit
It is time to replace the 120K kit.
Call Brother customer service to
replace the 120K kit.
Replace Fuser
It is time to replace the fusing unit.
Replace the fusing unit.
Replace OPC Belt
It is time to replace the OPC belt
cartridge.
Replace the OPC belt cartridge.
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 ...