Toshiba e-Studio 2330c
Adjustment. 1 Automatic gamma
When the reproduction of gradation is not appropriate, the gradation reproducibility of all colors Y, M, C and K can be corrected by performing this automatic gamma adjustment. In case the gradation reproduction of the image checked is not satisfactory, make this adjustment as described below at parts replacement.
- When unpacking or any of the following parts has been replaced, be sure to make this adjustment:
• Photoconductive drum • Developer material • Laser optical unit
• Transfer belt • 1st transfer roller • Drum cleaning blade
• Needle electrode • Main charger grid • Image position aligning sensor
• Image quality sensor • SRAM board (LGC board, SYS board) - When any of the following parts are replaced or adjusted, make a copy and check the image to determine if adjustment is necessary:
• 2nd transfer roller
Notes: 1. Be sure that this adjustment be made after performing the image adjustment in "Performing Image Quality Control (ICQ)" and "Image Dimensional Adjustment".
2. Normally, only the adjustment of color/black integrated pattern is needed. When the adjustment of "Beam level conversion setting" is made, color pattern and black pattern need to be adjusted individually.
Adjustment Mode (05)
| Code | Item to be adjusted | Contents |
|---|---|---|
| 1642 (1643) (580) | Automatic gamma adjustment | When the reproduction of gradation is not appropriate, the gradation reproducibility of all colors Y, M, C and K can be corrected by performing this automatic gamma adjustment. The result will be applied to all paper sizes. |
Procedure
- While pressing [0] and [5] simultaneously, turn the power ON. → Adjustment Mode
- Select the A4/LT drawer. Key in the pattern number and press the [FAX] button to output a gPatch chart for gamma adjustmenth.
Pattern No. Pattern No. Remark Paper type 4 Color/black integrated When performing code 05-1642 All paper types 200 Color/black integrated When performing code 05-1644-0 Plain paper 204 Color/black integrated When performing code 05-1644-2 Recycled paper 206 Color/black integrated When performing code 05-1644-3 Thick paper1 208 Color/black integrated When performing code 05-1644-4 Thick paper2 210 Color/black integrated When performing code 05-1644-5 Thick paper3 212 Color/black integrated When performing code 05-1644-6 Thick paper4 214 Color/black integrated When performing code 05-1644-7 Special paper 1 216 Color/black integrated When performing code 05-1644-8 Special paper 2 - Place the patch chart for adjustment printed in step (2) face down on the original glass. Place the chart aligning its side with 2 black squares against the original scale.
- Key in a code and press the [START] button. → The scanner reads the chart automatically and performs automatic gamma adjustment calculation (approx.30 sec.).
- When the adjustment has finished normally, “ENTER” is shown. Press the [ENTER] button to have the adjustment results reflected. (To cancel the reflection of adjustment results, press the [CANCEL] button.) In the case of an abnormal ending, “ADJUSTMENT ERROR” is shown. Press the [CANCEL] button to clear the error display. When it is cleared, the control panel display will return to the ready state. Then, check if the patch chart on the original glass is placed in the wrong direction or if it is placed inclined on the original glass, and then repeat step (3) and afterward.