Actions Yes No
Step 7
Replace the ADF unit. See “ADF unit removal” on page 316.
POR the machine into Configuration menu > Disable Scanner. From there,
select Enabled to change the setting to re-enable the scanner module and
then save the setting.
POR the MFP to operating mode. Run a copy from the flatbed.
Did the 840.xx error reoccur?
Go to step 8. The problem is solved.
Step 8
Inspect JFBM1, JHOME1 and JCIS1 on the controller board.
Are they properly connected?
Go to step 10. Go to step 9.
Step 9
Properly connect all the connections.
Did the 840.xx error reoccur?
The problem is solved. Go to step 10.
Step 10
Replace the flatbed unit. See “Flatbed assembly removal” on page 328.
POR the machine into Configuration menu > Disable Scanner. From there,
select Enabled to change the setting to re-enable the scanner module and
then save the setting.
POR the MFP to operating mode. Run a copy from the flatbed.
Did the 840.xx error reoccur?
Go to step 11. The problem is solved.
Step 11
Replace the controller board. See “Controller board removal” on
page 231.
The problem is solved. Contact second‑level
support.
ADF service check
Action Yes No
Step 1
Check all cables connecting the ADF and flatbed to the controller board.
Are they properly connected?
Go to step 3. Go to step 2.
Step 2
Re-connect the cables to the controller board.
Did this fix the problem?
The problem is solved. Go to step 3.
7015
Diagnostic information
128