Canon iPF825, Service Manual

Page: 254 / 316

Chapter 7
7-10
c) ADJUST
Performs adjustments and prints the adjustment and check patterns necessary for adjusting the printer parts.
1) PRINT PATTERN
SENSOR CHECK are intended for factory adjustment purposes.
No adjustment by service personnel is required.
2) HEAD ADJ.
Set or initialize the registration adjustment values of each printheads.
3) NOZZLE CHK POS.
This mode is for adjusting the optical axis of the head management sensor. For details, refer to "Disassembly/Reassembly" > "Adjustment and Setup Items" > "Pro-
cedure after replacing the head management sensor".
4) GAP CLIB.
This mode measures the gap between the printhead and media by using the multi sensor and corrects the calibration value.
5) CHANGE LF TYPE
Change the type of the feed roller.
0: Old feed roller
1: New feed roller
6) CR REG
Executes automatic head adjustment.
Make this adjustment if the registration remains partially misregistered after user-mode head adjustment.
EXECUTE: Execute automatic head adjustment.
RESET: Reset the registration adjustment value (0).
- Applicable media size is A2 (17inch) or larger.
- Applicable media type is photo glossy paper
If an error message appears when performing CR REG, check the following.
Replace the multi sensor if the error reoccurs after checking and performing CR REG again.
<CHECK>
1. Check for non-discharging of the printhead and dirty media, and replace the printhead and/or media if necessary.
2. Perform [Head Cleaning A].
3. Perform [Head Posi. Adj.]-[Auto].
Display Description
NOZZLE 1 Prints the nozzle check pattern by single direction/ single pass without using the non-
discharging back up.
It is used to check for the non-discharging nozzles.
- Media size: A4
- Media type: any
OPTICAL AXIS Prints the pattern and adjusts the optical axis of the multi sensor.
For details, refer to "Disassembly/Reassembly" > "Adjustment and Setup Items" > "Procedure
after replacing the carriage unit or multi sensor".
- Media type: photo glossy paper
LF TUNING Carry out automatic correction of eccentricity of the feed roller. For more details, refer to
"Disassembly/Reassembly" > "Adjustment and Setup Items" > "Procedure after Replacing the
Feed Roller or Feed Roller Encoder".
- Media type: Photo glossy paper
- Media size (width): 36 inches or wider
LF TUNING 2 Carry out manual correction of eccentricity of the feed roller. For more details, refer to
"Disassembly/Reassembly" > "Adjustment and Setup Items" > "Procedure after Replacing the
Feed Roller or Feed Roller Encoder".
- Media type: Photo glossy paper
- Media size (width): 36 inches or wider
Display Description
MANUAL HEAD ADJ DETAIL Prints the detail patterns for the manual head adjustment.
After printing, the mode will change to [ADJ. SETTING]. Check the printed patterns and input the set
values.
BASIC Prints the basic patterns for the manual head adjustment.
After printing, the mode will change to [ADJ. SETTING]. Check the printed patterns and input the set
values.
ADJ. SETTING A to F A-1 to F-2 This mode is to input the registration adjustment values.
It is possible to return the values to the former one by printing the status print before changing the value.
SAVE SETTINGS Save the registration adjustment values that has been input.
RESET SETTINGS Initialize the registration adjustment values (to 0).