Removing The Cis Unit - Canon imageRUNNER 2525 Series Service Manual

Removing the CIS Unit

■ Preparation
1. Open the platen (ADF/platen board cover).
2. Remove the reader rear cover.
Rear Cover" on page 136
3. Remove the right glass retainer.
4. Remove the platen glass.
on page 135
■ Procedure
1. Move the belt in the arrow direction and then the CIS unit
to the groove position of the frame.
"Removing the Reader
"Removing the Platen Glass"
2. Remove the CIS unit.
• Flexible cable
CAUTION:
When installing or removing the contact sensor unit, do
not touch the light guide and rod lens array.
Rod lens array
■ Action to Take When Replacing the
CIS Unit
After replacing the CIS unit, make the following adjustments:
● CIS white level automatic adjustment
1. Enter the service mode.
• SCAN> READER> FUNCTION> CCD> CCD-ADJ
2. Click the [OK] button.
When this step is complete, the contact sensor output is
adjusted and parameters are set automatically.
3. After completion of automatic adjustment, "OK" is
displayed.
● DF white level adjustment (platen board
cover scan/stream reading scan)
CAUTION:
Make this adjustment when the DADF is installed.
145
4. Disassembly/Assembly
Light guide