Image Quality Adjustment (Printing Function) - Toshiba e-STUDIO2330C Service Handbook

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
• Transfer belt
• Needle electrode
• Image quality sensor
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
Note:
Be sure that this adjustment be made after performing the image adjustment in
Performing Image Quality Control" and
Code
1004-0
1004-2
1004-3
1004-4
1004-5
1004-6
1004-7
1004-8
1008
* 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".
Pattern No.
70
74
76
78
80
82
84
86
e-STUDIO2330C/2820C/2830C/3520C/3530C/4520C
ADJUSTMENT
• Developer material
• 1st transfer roller
• Main charger grid
• SRAM board (LGC board, SYS board)
Paper type
Plain paper When the reproduction of gradation is not appropriate, the
gradation reproducibility of all colors Y, M, C and K can be
Recycled paper
corrected by performing this automatic gamma adjustment.
Thick paper 1
Thick paper 2
Thick paper 3
Thick paper 4
Special paper 1
Special paper 2
All paper types
Paper type
Plain paper
Recycled paper
Thick paper 1
Thick paper 2
Thick paper 3
Thick paper 4
Special paper 1
Special paper 2
• Laser optical unit
• Drum cleaning blade
• Image position aligning sensor
P.3-8 "3.1.6 Image Dimensional Adjustment".
Remarks
Remarks
Used when the code 1004-0 is performed
Used when the code 1004-2 is performed
Used when the code 1004-3 is performed
Used when the code 1004-4 is performed
Used when the code 1004-5 is performed
Used when the code 1004-6 is performed
Used when the code 1004-7 is performed
Used when the code 1004-8 is performed
© 2008, 2009 TOSHIBA TEC CORPORATION All rights reserved
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P.3-4 "3.1.3
<Adjustment Mode (05)>