All the color are washed out, and there is no error code number. The tech said the developer need changing. Is it that simple? The developer was changed very recently and not that many copies was made before the problem occurred. Changing the developer is very expensive.
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VK means black developer has reached end of life. You can safly carry on using the copier with this message displayed but over time the copy quality may slowly degrade. You will need to call a Sharp authorized dealer to replace the developer in the developer unit.
It's not developer light. It is drum unit light and maintenance. You have to replace the Drum, Blade and Developer. After changing them you have to reset the maintenance, drum,developer counter. This procedure must be made by a copier tech.
But if you still want only the developer the code is AR-202D
Possible bind in one or more of the developer units. Replace as needed.
Sec. 11 Page 11-61 it talks about Paper Feed Drive Motor, it is the
same motor as the Black Developer Drive Motor.
For L4-04 swap those two motors around to troubleshoot bad motor