Canon Color iR C3480, Service Manual

Page: 655 / 774

Chapter 17
17-52
2. CCD
T-17-42
3. CST
T-17-43
4. CLEANING
T-17-44
5. FIXING
INIT-C C color toner density signal (SGNL, REF) initial value reading
This is used when more than 100 sheets have passed through in error with a new CRG used in investigating image
defects, etc.
2
INIT-K K color toner density signal (SGNL, REF) initial value reading
This is used when more than 100 sheets have passed through in error with a new CRG used in investigating image
defects, etc.
2
COPIER>FUNCTION>CCD
Sub item Description level.
DF-WLVL1/2 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.
1
LUT-ADJ2 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.
2
COPIER>FUNCTION>CST
Sub item Description level.
MF-A4R, MF-A6R, MF-
A4 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.
1
COPIER>FUNCTION>CLEANING
Sub item Descripti level.
2TR-CLN 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.
1
TNR-COAT 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.
1
COPIER>FUNCTION>INSTALL
Sub item Description level.