Xerox DocuColor 1632 Service Manual Download

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6/02
6-79

DC1632/2240

dC612

General Procedures and Information

Prelaunch Training/Review

dC612 Color Test Pattern Print

Purpose

Prints the test patterns in the machine, to help identify Image Quality problems.

Procedure

Enter the

Diagnostic Mode

. Refer to

Entering Diagnostic Mode using the PWS

Select

Diagnostics

in the Service Entry Screen.

Select

Test Pattern (dc612)

To print a Test Pattern, select

Image Process System

Select the

Pattern Number

from the menu.

ii.

Select the

Paper Tray

iii.

Set the

number of prints

to output in the Print Count Box and select

Start

To print the Image Output Test Pattern, select

Image Output System

Image Output System

ii.

Paper (Simplex/Duplex)

iii.

Paper Tray/Size

iv.

Paper Type

Screen Type

vi.

Color Mode

vii. Set the number of prints to output and select

Start

Test Patterns

CAUTION

The patterns currently displayed do not match the descriptions in the table. The correct pattern
number/descriptions are TBD.

For details on the test pattern generation location and output path, see

Table 1

Table 1 Test Patterns

Patte
rn #

Pattern Name

Overview

Purpose

Location

ROS Check

Seal Glass Cleaning Guide: 20% Half Tone Full Band Width KCMRY Fast
Scan direction Stripe Pattern

The engine where defect has occurred can be determined as an
output sheet contains Seal Glass smearing. -> To determine defect
engine

IOT

Halftone (IOT)

Seal Glass Cleaning Guide: 20% Half Tone Full Band Width Full Half Tone.
Select the density from Cin=0~100.

Defect can be detected/evaluated (streaks, uneven density, band-
ing)

IOT

Grid 1dot

(For separating troubles) 512 dot Pitch Grid Pattern with 1 dot width

- Around Alignment and Color Regi
- Secondary Transfer part magnification failure

IOT

Fast Scan 8 Gradation (For separating troubles) Fast Scan direction 8 Gradation Pattern

For development.
For ASIC debug.

IOT

A1 Patch

Forms a bi-axial near the IN and OUT edges in full color. (Chevron Pattern)
At normal Regi Control cycle: Approx. half cycle of IBT Belt (2 sheets of A4
continuous) At Diag Regi Control cycle: Approx. 1 cycle of IBT Belt (1: 4
sheets of A4 continuous)

For Color Regi adjustment in Diag DC685-1 (Skew Fine Setup)
and DC685-2 (In/Out Setup) during JOB, at beginning of JOB and
end of JOB. Also, for Color Regi reading in DC681 and DC684.

Controller

A2 Patch

Forms a 1 axial near CNT for approx. 1 cycle (1: 4 sheets of A4 continuous)
of IBT Belt in full color. (Chevron Pattern)

For Color Regi adjustment in Diag DC685-3 (Center Setup)

Controller

B1 Patch

Forms a bi-axial near the IN and OUT edges for approx. 1 cycle (1: 4 sheets
of A4 continuous) in full color. ("<" pattern)

For Color Regi rough adjustment in Diag DC685-1 (Skew Fine
Setup) and 685-4 (Skew Rough Setup).

Controller

B2 Patch

Forms a 1 axial near CNT for approx. 1 cycle (1: 4 sheets of A4 continuous)
of IBT Belt in full color. ("<" pattern)

For Color Regi adjustment in Diag DC685-3 (Center Setup)

Controller

C Patch

Forms a three-axle IN/CNT/OUT in approx. 1 cycle (1: 4 sheets of A4 contin-
uous) of IBT Belt in single color C. (Chevron Pattern)

For Diag DC683 (to check Sensor, Cyan and position shift).

Controller

Binary/Auto Gradation
Correction PG (For
Printer) LUT: C-TRA
OFF IOT OFF

(For gradation correction) Gradation pattern for gradation correction for
printing LUT: C-TRA OFF IOT OFF

To output during Auto Gradation Correction. For checking
CTRACS feature. The same pattern as this output pattern is even
output in the CTRACS feature (Reads the output pattern by IIT
and sets up the color reproducibility) inside the Tools (opened to
customer). The test pattern here is able to check the setup effects
of the Printer feature.

Xerox DocuColor 1632, Service Manual

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