Canon iR C3380 series Service Manual page 524

Chapter 17
2. CCD
Sub item
DF-WLVL1/2
LUT-ADJ2
3. CST
Sub item
MF-A4R, MF-A6R, MF-
A4
4. CLEANING
Sub item
2TR-CLN
TNR-COAT
5. FIXING
Sub item
NIP-CHK
6. PANEL
Sub item
LCD-CHK
17-40
Use it to adjust the ADF white level.
Method of Operation
1) Place the type of original most often used by the user on the copyboard glass, and perform the following service mode
item: COPIER>FUNCTION>CCD>DF-WLVL1. (In response, the machine will read the white level for book mode,
checking the transmission quality of the glass for book mode).
2) Place the type of original most often used by the user in the DF, and perform the following service mode item:
COPIER>FUNCTION>CCD>DF-WLVL2. (In response, the machine will read the white level for DF mode (stream
reading mode), checking the transmission quality of the reading glass by reading both sides of the original.)
face reading: computes DFTAR-R/G/B
back reading: computes DFTAR2-R/G/B
Be sure to execute this item in combination with item 2.
CCD gain detailed compensation
Operation procedure
1) Place the 10-gradation chart (D-10 test sheet: FY9-9129) on the document glass surface, as shown in the figure below.
2) Select the item, and press the OK key. Automatic adjustment now commences.
3) Upon completion of the adjustments, operation automatically stops.
4) Set the COPIER>OPTION>BODY>CCD-LUT value to "1."
5) The service mode (COPIER>ADJUST>CCD) item is updated so print out the service sheet and keep it.
Registers basic value of manual feeder's (DADF's) paper width.
A4R width: 210mm, A6R width: 105mm, A4 width: 297mm
- Once registered, the basic value can be fine-tuned by performing COPIER> ADJUST > CST-ADJ > MF-A4R, MF-
A6R or MF-A4.
Operation method
1) Place A4R size paper in the manual feeder, and set the size guide to the A4R width.
2) In this service mode, select 'MF-A4R' to display the item in reverse. Press the OK key to perform automatic adjustment
and register the value.
3) Repeat Steps 1) and 2) to register the basic values for the A6R and A4 sizes.
COPIER>FUNCTION>CLEANING
Secondary transfer roller cleaning
This is for the bias cleaning of the secondary transfer roller.
It is used when the sheets are stained or smudged by dirt in the secondary transfer roller toner.
Secondary transfer outer roller toner application mode
When the right door is closed while the secondary transfer roller is not dirty (when a new roller is used), the substance
on the secondary transfer roller surfaces rubs against the ITB and becomes adhered to it, leaving areas of the images white
where the substance was rubbed onto the ITB. In order to remove this adhered substance, toner is transferred once to the
secondary transfer outer roller, and then the secondary transfer outer roller is cleaned.
This is used when the secondary transfer roller has been replaced with a new one.
Output for automatically measuring fixing nip width
The fixing nip width automatic measurement is started, and the measurement sheet is printed. The two-sided printing
operation is performed with solid magenta printed on the first side and nothing printed on the second side, and nipping
is performed when the second side is fixed.
This is used in order to check the nip width when the fixing unit, fixing film unit or pressure roller is replaced.
Operating procedure
1) Place A4 (LTR) size sheets in the stack bypass tray.
2) Press the OK key. (The paper in the stack bypass tray is fed.)
3) The sheets which have been fed stop temporarily at the fixing nip unit, and are delivered 15 seconds later.
4) Check that the nip width of the delivered sheets corresponds to the rating.
Nip width rating
Center area [b in figure below]: 8 mm or more
Left and right edges [a, c in figure below]: 1 mm or less
COPIER>FUNCTION>PANEL
Used to check missing dots in LCD.
Operation method
1) Select this item, then press the OK key to start the operation.
The touch panel's front surface should light repeatedly in the sequence: white, black, red, green and blue. (Check that it
does.)
2) Press the stop key (the clear key on printer models) to end the operation.
T-17-42
COPIER>FUNCTION>CCD
Description
T-17-43
COPIER>FUNCTION>CST
Description
T-17-44
Descripti
T-17-45
COPIER>FUNCTION>FIXING
Description
T-17-46
Description
level.
1
2
level.
1
level.
1
1
level.
1
level.
1