Image Quality Adjustment (Printing Function) - Toshiba e-STUDIO6520C 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 (IQC)" and
(General description)".
Code Code
(600dpi) (1200dpi)
1004-0 1005-0
1004-1 1005-1
1004-2 1005-2
1004-3 1005-3
1004-4 1005-4
1004-5 1005-5
1004-6 1005-6
1004-7 1005-7
1004-8 1005-8
1008 1009
* If the code 1008 (600dpi) or 1009 (1200dpi) is performed, the adjustment will be applied to all paper
types.
© 2008-2011 TOSHIBA TEC CORPORATION All rights reserved
• Developer material
• 1st transfer roller
• Main charger grid
• SRAM board (LGC board, SYS board)
P.3-7 "3.1.5 Image Dimensional Adjustment
Paper type
Plain paper 1
Plain paper 2
Recycled paper
Thick paper 1
Thick paper 2
Thick paper 3
Thick paper 4
Special paper 1
Special paper 2
All type paper
*
3 - 47
• Laser optical unit
• Drum cleaning blade
• Image position aligning sensor
P.3-4 "3.1.3
<Adjustment Mode (05)>
Remarks
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.
e-STUDIO5520C/6520C/6530C
3
ADJUSTMENT