e-STUDIO2020C/2330C/2820C/2830C/3520C/3530C/4520C © 2008 - 2011 TOSHIBA TEC CORPORATION All rights reserved
ADJUSTMENT
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3.3 Image Quality Adjustment (Printing Function)
3.3.1 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. In case the gradation
reproduction of the image checked is not satisfactory, make this adjustment as described below at parts
replacement.
1. 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)
2. When any of the following parts are replaced or adjusted, make a print and check the image to
determine if adjustment is necessary:
• 2nd transfer roller
Be sure that this adjustment be made after performing the image adjustment in P.3-4 "3.1.3
Performing Image Quality Control (ICQ)" and P.3-8 "3.1.6 Image Dimensional Adjustment".
<Adjustment Mode (05)>
* If the code 1008 is performed, the adjustment will be applied to all paper types.
<Procedure>
1. While pressing [0] and [5] simultaneously, turn the power ON. → Adjustment Mode
2. Select the A4/LT drawer. Key in the pattern number and press the [FAX] button to output a “Patch
chart for adjustment”.
Code Paper type Remarks
1004-0 Plain paper 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.
1004-2 Recycled paper
1004-3 Thick paper 1
1004-4 Thick paper 2
1004-5 Thick paper 3
1004-6 Thick paper 4
1004-7 Special paper 1
1004-8 Special paper 2
1008 All paper types
Pattern No. Paper type Remarks
70 Plain paper Used when the code 1004-0 is performed
74 Recycled paper Used when the code 1004-2 is performed
76 Thick paper 1 Used when the code 1004-3 is performed
78 Thick paper 2 Used when the code 1004-4 is performed
80 Thick paper 3 Used when the code 1004-5 is performed
82 Thick paper 4 Used when the code 1004-6 is performed
84 Special paper 1 Used when the code 1004-7 is performed
86 Special paper 2 Used when the code 1004-8 is performed
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