Brother MFC640CW - Page 266

9-15 Confidential
Error Code
(Hex)
Symptom Probable Cause Solution
CIS flat cable not
connected properly
Correct the connection.
CIS defective Replace the scanner
cover (scanner unit).
A4 50% or more faulty of
white level data.
(Not used.)
Main PCB defective Replace the main PCB.
A5 FAX scanning failure (1st
time)
CIS defective
White-level reference
film stained in the
scanner cover
Replace the scanner
cover (scanner unit).
A6 FAX scanning failure
(retry)
Main PCB defective Replace the main PCB.
A7 Mismatch between the CIS
type and EEPROM data
Scanner cover containing
the improper CIS type
mounted at repair
Check the CIS type and
write it to the EEPROM
by using maintenance-
mode function code 59.
(Refer to Chapter 8,
Section 8.4.12.)
A8-AB Not used.
CIS defective Replace the scanner
cover (scanner unit).
AC Less than 50% faulty of
white level data.
(Not used.)
Main PCB defective Replace the main PCB.
AD-AE Not used.
CIS flat cable broken
or not connected
Correct the cable
connection.
Replace the scanner
cover (scanner unit).
CIS motor harness not
connected properly
Correct the harness
connection.
CIS motor defective Replace the scanner
cover (scanner unit).
Drive unit defective Replace the scanner
cover (scanner unit).
CIS defective Replace the scanner
cover (scanner unit).
AF CIS positioning error.
Main PCB defective Replace the main PCB.