Brother MFC-B7720DN Service Manual

2-70
Confidential
 Error code BF00
The document scanning position sensor detected that the document length was 400 mm or
longer and could not be fed to ADF (double-side restoration).
<User Check>
• Set the specified size paper.
 Error code C700
The memory is insufficient to expand the data of PC-Print.
Error code C800
The memory used to store secure print data exceeded the memory size for secure print data.
<User Check>
• Print the print data stored in the memory.
• Divide the print data and print them separately.
 Error code D100
An error occurred while initializing the modem.
Error code D200
Detected that the modem PCB is not connected.
Step Cause Remedy
1
Document scanning position
actuator caught in some sections
of the machine
Reattach the document scanning position
actuator.
2
Document scanning position
sensor failure
Replace the ADF unit.
3 Main PCB failure Replace the main PCB ASSY.
Step Cause Remedy
1 Main PCB failure Replace the main PCB ASSY.
Step Cause Remedy
1
Connection failure of the modem
flat cable
Reconnect the modem flat cable.
2 Modem flat cable failure Replace the modem flat cable.
3 Modem PCB failure Replace the modem PCB ASSY.
4 Main PCB failure Replace the main PCB ASSY.

Brother MFC-B7720DN Specifications

General

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