Brother MFC-B7720DN Service Manual

2-30
Confidential
Print Unable
E0
Turn the power off
and then back on
again.
An error occurred in the ROM
check sum.
E000 2-71
Print Unable
E1
Turn the power off
and then back on
again.
Program error
E100 2-71
Print Unable
E5
Turn the power off
and then back on
again.
An error occurred during access
to the DRAM in the main PCB
ASSY.
E500 2-71
Print Unable
E6
Turn the power off
and then back on
again.
Write error in the EEPROM of
the main PCB ASSY
E600 2-71
Print Unable
E7
Turn the power off
and then back on
again.
System error in the flash ROM E701 2-71
Read error in the flash ROM
E702 2-71
Print Unable
E9
Turn the power off
and then back on
again.
An error occurred while
initializing the NFC.
E900 2-72
Print Unable
ZC
Turn the power off
and then back on
again.
Detected that supply power is
unstable. (less than 100 times)
6F00 2-58
Replace Drum -
Number of the drum unit
rotations has reached the upper
limit.
4200 2-52
Replace Toner -
Dot count or develop roller
counter of the toner cartridge in
models without toner box is
reaching the upper limit in the
continuous printing mode.
4D01 2-52
Open the Front
Cover, then install
Toner Cartridge
The amount of toner supplied of
the toner box has reached the
upper limit.
4C06 2-52
Open the Front
Cover, replace
Toner Cartridge.
Dot count or develop roller
counter of the toner cartridge in
models without toner box has
reached the upper limit in the
toner stop mode.
4C01 2-52
Error message
Description
Error
codes
Refer
to:
Initial display Scroll

Brother MFC-B7720DN Specifications

General

Brand	Brother
Model	MFC-B7720DN
Category	All in One Printer
Language	English