Toshiba e-studio 2555c, Service Manual, Page: 477 / 1558

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© 2012-2013 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO2555C/3055C/3555C/4555C/5055C
SETTING / ADJUSTMENT
6 - 51
6.3 Image Quality Adjustment (Printing Function)
6.3.1 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
- LED head
- LED gap spacer
- Transfer belt
- 1st transfer roller
- Drum cleaning blade
- Needle electrode
- Main charger grid
- Image position aligning sensor (Front)
- Image position aligning sensor (Rear)/Image quality sensor
- SRAM board (SYS board)
- EEPROM (LGC board)
- HDD
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
• Screen switchover (for color: 08-8110, for black: 08-7310)
Notes:
Be sure to perform this adjustment after performing

P. 6-4 "6.1.3 Performing Image Quality
Control".