Kyocera FS-2020, FS-3920, FS-4020 SERVICE MANUAL

FS-2000D, FS-3900DN, FS-4000DN, FS-2020D, FS-3920DN, FS-4020DN

GRAY BACKGROUND ISSUE

TROUBLESHOOTING GUIDE

KDE PRODUCT ENGINEERING

FS-2000D, FS-3900DN, FS-4000DN, FS-2020D, FS-3920DN, FS-4020DN

GRAY BACKGROUND ISSUE

TROUBLESHOOTING GUIDE INDEX

 Hardware issue Page 3
 Software issue Page 7
 Appendix Page 9

Page 2

HARDWARE ISSUE

Page 3

As countermeasures against the fog image from the discolored main charge roller surface, the following points were changed so that the main
charger roller surface can be better cleaned.

1. Change of the BUSH MC ROLL:

The hole of the bush was changed from oval to round in order to limit vertical movement of the cleaning brush within the oval hole.
(Change of the hole of the brush opposite to the drive side was informed by SB-2F8-0025-8520.)

2. Change of the ROLLER MC CLN B:

The brush density was changed from 180KF to 120KF in order to adjust contact pressure with the MC roller due to the change above.

3. Adding SHEET ROLLER DRUM:

The SHEET ROLLER DRUM was added in order to prevent toner from passing through to the drum (DK-320 only).

Detailled information you will find in Service Bulletin 2F8-0036(A053)