Since multi sensor has individual electrical specificity, the following are recalibrated at the factory, namely, the optical axis of the sensor, the sensor gain for meas-

uring the printhead height and sensor calibration. Accordingly, carry out the following adjustments in the service mode whenever replacing the carriage unit or

multi sensor.

The multi sensor reference plate(QL2-1738-000:BASE, MULTI SENSOR REFERENCE) must be replaced at the same time whenever the carriage or the

multi sensor is being replaced.

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

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

Media type : Photo glossy paper

Media size : Media having a width equal too larger than that of A2-size paper

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 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 : Media having awidth equal to or larger than that of 36inch-size 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 : Photo glossy paper

Media size : Media having awidth equal to or larger than that of 36inch-size 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, reasjustment is required

Peform the readjustment in the service mode.

Service mode : SERVICE MODE > ADJUST > NOZZLE CHK POS.

4-24

Adjustment item

Multi sensor recalibration

Adjusting feed roller eccentricity

Head management sensor recalibration

T-4-1

Adjustment timing

Multi sensor replacement/removal

Carriage unit replacement/removal