Canon iPF8400S Series, Service Manual

Page: 166 / 312

Chapter 4
4-36
4.5 Adjustment and Setup Items
4.5.1 Adjustment Item List
0023-5489
The following adjustment procedures need to be performed when parts have been replaced or removed and then reinstalled:
4.5.2 Procedure after Replacing the Carriage Unit or Multi Sensor
0025-0406
a) Note on replacing the carriage unit and the multi sensor
- The multi sensor reference unit (QL2-8099: MOUNT, SENSOR ADJUSTING) must be replaced at the same time whenever the carriage or the multi sensor is
being replaced.
b) Multi Sensor Recalibration
Because the distance between the multi sensor (in the carriage unit) and the nozzles (in each printhead) is varied from one unit to another, the printer has its optical
axis corrected and paper gap adjustment sensor gain and calibration adjusted prior to shipment. When the carriage unit or multi sensor has been replaced, they should
require adjustment.
Execute service mode under the following conditions to launch automatic adjustment:
1) Carry out the following service mode without media loading.
- Service mode : SERVICE MODE > ADJUST > GAP CALIB.
2) Load the following media.
Media type : Photo glossy paper
Media size : Media having a width equal toor larger then that of A2-size paper
3) Carry out the following service mode.
- Service mode : SERVICE MODE > ADJUST > PRINT PATTERN > OPTICAL AXIS
c) Carriage Motor Adjustment
- After the carriage and carriage motor and carriage belt and linear encoder sensor has been removed or replaced, execute the following service mode.
Service mode: SERVICE MODE > ADJUST > CR MOTOR COG
4.5.3 Procedure after Replacing the Feed Roller or Feed Roller Encoder
0032-0782
Feed roller eccentricity is factory-adjusted (correction of variation in the paper feed amount per rotation). It is necessary to adjust feed roller eccentricity after re-
placing the feed roller or feed roller encoder.
In the service mode, perform automatic adjustment of feed roller eccentricity.
Service mode : SERVICE MODE > ADJUST > PRINT PATTERN > LF TUNING
- Media type: Photo glossy paper
- Media size (width): 36 inches or wider
If adjustment cannot be done properly by selecting "SERVICE MODE > ADJUST > PRINT PATTERN > LF TUNING" (auto adjustment), carry out manual ad-
justment.
Service mode : SERVICE MODE > ADJUST > PRINT PATTERN > LF TUNING2
- Media type: Photo glossy paper
- Media size (width): 36 inches or wider
Check the printed pattern and enter values for adjustment.
4.5.4 Procedure after Replacing the Head Management Sensor
0013-7146
Since the distance between the head management sensor and the carriage unit varies among printers, the optical axis is factory-adjusted to adjust the non-discharging
detection position. When you have replaced the head management sensor or performed assembly/reassembly of surrounding parts that can change the distance be-
tween the head management sensor and the carriage unit, readjustment is required.
Perform the readjustment in the service mode.
Service mode : SERVICE MODE > ADJUST > NOZZLE CHK POS.
Adjustment item Adjustment timing
Multi sensor recalibration Multi sensor replacement/removal
Carriage unit replacement/removal
Adjusting feed roller eccentricity Feed roller
Feed roller encoder
Head management sensor recalibration Head management sensor replacement/removal
Carriage unit replacement/removal
Carriage motor recalibration Carriage unit replacement/removal
Carriage motor replacement/removal
Carriage belt replacement/removal