2-178 Service Manual
7462
Spots (using flatbed scanner)
5
Perform a print test using the ADF unit assembly.
Does the error continue?
Replace the
scanner
controller card
assembly.
Go to “Scanner
controller card
assembly
removal
(models X651,
X652, X654 and
X656)” on
page 4-129.
Problem
resolved.
Step Check Yes No
1 Check the large platen glass on the scanner unit
assembly.
Is the large platen glass contaminated or damaged?
Clean or replace
the scanner
platen glass
cover.
Go to “Scanner
platen glass
cover
assembly
removal
(models X651,
X652, X654 and
X656)” on
page 4-137 or
“Scanner
platen glass
cover
assembly
removal (model
X658)” on
page 4-136.
Go to step 2.
2
Check the three mirrors in the scanner unit assembly.
Are the three mirrors contaminated or show signs of
dust?
Clean the three
mirrors in the
scanner unit
assembly.
Go to step 3.
Step Check Yes No
Leading edge
Trailing edge
Leading edge
Trailing edge