Brother DCP6690CW Service Manual page 139

Error Code
Symptom
(Hex)
A4 Not used.
A5 FAX scanning failure
(1st time)*.
A6 FAX scanning failure
(retry)*.
A7 Not used.
(Mismatch between the
type of the CIS mounted
and EEPROM data.)
A8 Color parameter
matching error. (Used
for monitoring bugs at
the factory.)
A9-AE Not used.
AF CIS positioning error.
* For MFC only
Probable Cause
CIS defective
White reference film stained
in the scanner cover
Main PCB defective
(Scanner cover containing
the improper CIS type
mounted at repair.)
---
CIS flat cable broken or not
connected properly
CIS motor harness not
connected properly
CIS motor defective
CIS drive unit defective
CIS defective
Main PCB defective
4-27
Solution
Replace the scanner cover
(scanner unit).
Replace the main PCB.
(Check the CIS type mounted
and enter the new CIS type into
the EEPROM with Function
code 59 in the maintenance
mode.)
Install the latest firmware.
Correct the cable connection.
Replace the scanner cover
(scanner unit).
Correct the harness
connection.
Replace the scanner cover
(scanner unit).
Replace the main PCB.
Confidential