Xerox 7142 Service Manual - page 153

RJ-901C/RJ-900C 　 Maintenance Manual

5 Self-Diagnosis Mode

5-35

5.5.7

Repeatability Adjustment Menu

This menu is used to align the head positions for repeatability printing.

To align the head position for repeatability printing, at first print out a Bi-D printing and identify the 

difference between the CW printing position and the CCW printing position. Then, enter the difference 

between the relevant parameters.

Due to head characteristics, only one adjustment value is used for all nozzle rows. Therefore, adjust the 

setting value so that performance of each row becomes average.

Adjustment items are shown in the tables below.

The actual procedure is as follows.

1. Set media as necessary.

2. After media is set, the machine prints out repeatability adjustment patterns.

Table 5-8 Bi-D Items

Adjustment Item

Contents

Repeatability adjustment 

Low 1

Bi-D adjustment for low head height, PG 1 value, using 3-peak waveform

Repeatability adjustment 

Low 2

Bi-D adjustment for low head height, PG 1 value, using 6-peak waveform

Repeatability adjustment 

High 1

Bi-D adjustment for high head height, PG 2 value, using 3-peak waveform

Repeatability adjustment 

High 2

Bi-D adjustment for high head height, PG 2 value, using 6-peak waveform