be improved.
2. Toner issue (environment dependent)
1. Check the environment and use condition of the machine
• Ambient temperature (The room temperature 30 degrees C and over is not
allowed.)
• Whether there was a occasion that internal cooling system did not function: JAM
or SC during continuous print
• Whether customer turn OFF main power switch just after completing printing daily.
• Toner storage condition (exposed to sun-light etc)
2. Conduct toner refresh mode and check whether ejecting soft clumps is effective.
Number of times of Toner refresh: Twice
If following condition(s) are applicable, conduct less than twice.
• Coverage (Last 5000 prints)
3% or more, and less than 5% Once
5% or more None
• Life of Transfer cleaning blade
50% or more Once
→ If this does not improve, go to “3. Toner issue (environment independent)”.
If the symptom is improved, print 50 sheets of test chart No. 53 (with 255 setting) in
the problem color on A3 to eject the soft clumping inside the developer for
improvement.
3. Toner issue (environment independent)
Clean (or replace) toner supply, toner hopper section and toner conveyance path then
replace developer.
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