Ricoh M136 SPC352DN Ve-P1d

Problem

At the time of installation and soon after changing the PCDU, the following may occur:
• In half-tone images with low gradation, problems such as insufficient density and inadequate tone may occur. Furthermore, the density of halftone images may increase while in use.

Cause

This occurs because of variation in characteristics of components (for development) on the initial use of the PCDU. The density of half-tone images with low gradation is unstable only on the initial use.

Solution

1. Execute [Auto Image Density Adjustment & Colour Calibration] in the user mode.
2. If the adjustment by [Auto Image Density Adjustment & Colour Calibration] is insufficient, perform adjustment manually by referring to the color gradation correction sheet.

Correct the Color Gradation Automatically

This procedure varies between models depending on the control panel specifications (whether the panel is a fourline panel or touch panel). Read the section for your model.

1. Press the [User Tools] key.
2. [Maintenance: Image] > [Auto Image Density Adjustment & Colour Calibration] > [Adjustment and Calibration]
3. Select the resolution as follows.
   1st time: 600 x 600 (1-bit)
   2nd time: 600 x 600 (2-bit)
   3rd time: 600 x 600 (4-bit) 4th time: 1200 x 1200 (1-bit)
4. Press [OK]
5. Successful completion at first to third execution => Return to Step 3. Successful completion at fourth execution => Complete
   • If the execution has failed => In SP mode, check the execution results of MUSIC and process control to identify the cause of the problem.

Setting Gradation Correction Values

• Before performing this procedure, be sure to execute [Auto Image Density Adjustment & Colour Calibration].

Overview

The color gradation correction sheet is a tool for assessing whether the machine is printing images accurately when receiving customer complaints on the tone of printed images, and making corrections accordingly.

Procedure

1. Print test pattern 1. [User Tools] key > [Maintenance: Image] > [Color Calibration] > [Print Test Pattern 1 for Calibration]
2. Compare the printed test pattern of gradation correction sheet 1 with the color sample and select the numbers matching the color.
   • As the initial setting, the color values for K, M, and C/Y are set to 3, 3, and 3/3. Cyan and yellow are set as a combined value of C/Y. For example, the following pattern indicates C=5 and Y=2.
3. After entering the values, print the test pattern of graduation correction sheet and compare it with the color sample.
4. Check that the setting is correct and save the setting.
5. Perform gradation correction 2 according to Steps 2 to 4.