Technical Bulletin PAGE: 33/75
Reissued:21-Apr-14
5. Horizontal bands
5-1. 40mm wide dark bands appear in 314mm pitch
Excerpt from RTB RM077099
Image density appears uneven, darker compared to the surrounding area, when running
the machine in low temperature and low humidity environment.
Cause
Corona products penetrate the drum surface layer and changes the charge characteristics.
Solution
Keep the exhaust fans running continuously to completely get rid of corona products from
the system by modifying the settings below.
1. Enter User Tools System Settings Timer Setting, and set the Timer Setting to
OFF.
2. SP1-940-03: Ozone fan timer setting (default: 56min)
Change this value to “1270” min.
SP1-940-04: Development fan timer setting (default: 56min)
Change this value to “1270” min.
SP1-202-01: Heating roller temperature in low power mode (default: 110 degrees C)
Change this value to “0” degrees C.
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