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 HP sensor or feed roller encoder.

In the service mode, perform automatic adjustment of feed roller eccentricity.

Service mode : SERVICE MODE > ADJUST > PRINT PATTERN > LF TYNING

Media type : Photo glossy paper

Media size : Media having awidth equal to or larger than that of A2-size paper

4.5.2 Procedure after Replacing the Carriage Unit or Multi Sensor

a) Multi Sensor Recalibration

Since multi sensors have individual electrical specificity, the following are recalibrated at the factory, namely, the optical axis of the sensor, the sensor gain for

measuring the printhead height and color reproduction. Accordingly, carry out the following adjustments in the service mode whenever replacing the carriage unit

or multi sensor.

The multi sensor reference plate 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 > SENSOR CALIB

Test chart : CL-7( Tool No. : FY9-9323 Use anew chart.)

* 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

b) Adjusting the wire roller

To prevent the wire roller mounted on the carriage from contacting the duct and others during carriage operation, perform the following adjusutment whenever tou

have removed or replaced the carriage unit. This adjustment is not required when you have replaced only the multi sensor.

4-38

PG 641

Approx.20mg

F-4-101

PG-641

Approx.12mg

F-4-102

0012-6480

0012-6486

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