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) Optical axis correction

- Service mode : SERVICE MODE > ADJUST > PRINT PATTERN > OPTICAL AXIS

Media type : Photo glossy paper

Media size : Media having a width equal toor larger then that of A2-size paper

2) Paper gap adjustment

- Service mode: SERVICE MODE > ADJUST > GAP CALIB.

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

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 encoder or feed roller.

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

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: Gloss photo paper

Check the printed pattern and enter values for adjustment.

4.5.4 Procedure after Replacing the Head Management Sensor

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.

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Adjustment item

Multi sensor replacement/removal

Carriage unit replacement/removal

Feed roller

Feed roller encoder

Head management sensor replacement/removal

Carriage unit replacement/removal

Carriage motor replacement/removal